diff options
| author | jcorgan <jcorgan@221aa14e-8319-0410-a670-987f0aec2ac5> | 2007-09-18 18:59:00 +0000 |
|---|---|---|
| committer | jcorgan <jcorgan@221aa14e-8319-0410-a670-987f0aec2ac5> | 2007-09-18 18:59:00 +0000 |
| commit | e692e71305ecd71d3681fe37f3d76f350d67e276 (patch) | |
| tree | dc320c9261303aa9a92f4d12bdba85f82720d1bf /gnuradio-core/src | |
| parent | 6ad04a094ced626e46c210b9847eae46a1ae8e67 (diff) | |
Merge r6461:6464 from jcorgan/t162-staging into trunk.
* Final gr.top_block and gr.hier_block2 implementation inside
gnuradio-core/src/lib/runtime
* Implementation of gr.hier_block2 versions of all the old-style blocks
in blks. These live in blks2.
* Addition of gr.hier_block2 based versions of gr-wxgui blocks
* Conversion of all the example code in gnuradio-examples to use this
new code
* Conversion of all the gr-utils scripts to use the new code
The OFDM examples and related hierarchical blocks have not yet been
converted. Code in the rest of the tree that is outside the core
and example components has also not yet been converted.
git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@6466 221aa14e-8319-0410-a670-987f0aec2ac5
Diffstat (limited to 'gnuradio-core/src')
47 files changed, 3629 insertions, 298 deletions
diff --git a/gnuradio-core/src/lib/runtime/gr_hier_block2.cc b/gnuradio-core/src/lib/runtime/gr_hier_block2.cc index f531e76adc..23f274da7d 100644 --- a/gnuradio-core/src/lib/runtime/gr_hier_block2.cc +++ b/gnuradio-core/src/lib/runtime/gr_hier_block2.cc @@ -52,6 +52,12 @@ gr_hier_block2::~gr_hier_block2() } void +gr_hier_block2::connect(gr_basic_block_sptr block) +{ + d_detail->connect(block); +} + +void gr_hier_block2::connect(gr_basic_block_sptr src, int src_port, gr_basic_block_sptr dst, int dst_port) { @@ -59,6 +65,12 @@ gr_hier_block2::connect(gr_basic_block_sptr src, int src_port, } void +gr_hier_block2::disconnect(gr_basic_block_sptr block) +{ + d_detail->disconnect(block); +} + +void gr_hier_block2::disconnect(gr_basic_block_sptr src, int src_port, gr_basic_block_sptr dst, int dst_port) { @@ -66,6 +78,12 @@ gr_hier_block2::disconnect(gr_basic_block_sptr src, int src_port, } void +gr_hier_block2::disconnect_all() +{ + d_detail->disconnect_all(); +} + +void gr_hier_block2::lock() { d_detail->lock(); diff --git a/gnuradio-core/src/lib/runtime/gr_hier_block2.h b/gnuradio-core/src/lib/runtime/gr_hier_block2.h index 7ecc0d770b..6124e4d51a 100644 --- a/gnuradio-core/src/lib/runtime/gr_hier_block2.h +++ b/gnuradio-core/src/lib/runtime/gr_hier_block2.h @@ -58,32 +58,18 @@ protected: public: virtual ~gr_hier_block2(); + void connect(gr_basic_block_sptr block); + void connect(gr_basic_block_sptr src, int src_port, gr_basic_block_sptr dst, int dst_port); + void disconnect(gr_basic_block_sptr block); + void disconnect(gr_basic_block_sptr src, int src_port, gr_basic_block_sptr dst, int dst_port); - /*! - * Lock a flowgraph in preparation for reconfiguration. When an equal - * number of calls to lock() and unlock() have occurred, the flowgraph - * will be restarted automatically. - * - * N.B. lock() and unlock() cannot be called from a flowgraph thread - * (E.g., gr_block::work method) or deadlock will occur when - * reconfiguration happens. - */ + void disconnect_all(); virtual void lock(); - - /*! - * Lock a flowgraph in preparation for reconfiguration. When an equal - * number of calls to lock() and unlock() have occurred, the flowgraph - * will be restarted automatically. - * - * N.B. lock() and unlock() cannot be called from a flowgraph thread - * (E.g., gr_block::work method) or deadlock will occur when - * reconfiguration happens. - */ virtual void unlock(); gr_flat_flowgraph_sptr flatten() const; diff --git a/gnuradio-core/src/lib/runtime/gr_hier_block2.i b/gnuradio-core/src/lib/runtime/gr_hier_block2.i index b3882a6a87..5278eefceb 100644 --- a/gnuradio-core/src/lib/runtime/gr_hier_block2.i +++ b/gnuradio-core/src/lib/runtime/gr_hier_block2.i @@ -36,20 +36,24 @@ gr_hier_block2_sptr gr_make_hier_block2(const std::string name, class gr_hier_block2 : public gr_basic_block { private: - gr_hier_block2(const std::string name, - gr_io_signature_sptr input_signature, - gr_io_signature_sptr output_signature); - + gr_hier_block2(const std::string name, + gr_io_signature_sptr input_signature, + gr_io_signature_sptr output_signature); + public: - ~gr_hier_block2 (); - - // Add a named block to the container - void connect(gr_basic_block_sptr src, int src_port, - gr_basic_block_sptr dst, int dst_port) - throw (std::invalid_argument); - void disconnect(gr_basic_block_sptr src, int src_port, - gr_basic_block_sptr dst, int dst_port) - throw (std::invalid_argument); - void lock(); - void unlock(); + ~gr_hier_block2 (); + + void connect(gr_basic_block_sptr block) + throw (std::invalid_argument); + void connect(gr_basic_block_sptr src, int src_port, + gr_basic_block_sptr dst, int dst_port) + throw (std::invalid_argument); + void disconnect(gr_basic_block_sptr block) + throw (std::invalid_argument); + void disconnect(gr_basic_block_sptr src, int src_port, + gr_basic_block_sptr dst, int dst_port) + throw (std::invalid_argument); + void disconnect_all(); + void lock(); + void unlock(); }; diff --git a/gnuradio-core/src/lib/runtime/gr_hier_block2_detail.cc b/gnuradio-core/src/lib/runtime/gr_hier_block2_detail.cc index 76d23cab02..26a28fabd7 100644 --- a/gnuradio-core/src/lib/runtime/gr_hier_block2_detail.cc +++ b/gnuradio-core/src/lib/runtime/gr_hier_block2_detail.cc @@ -44,6 +44,27 @@ gr_hier_block2_detail::~gr_hier_block2_detail() d_owner = 0; // Don't use delete, we didn't allocate } +void +gr_hier_block2_detail::connect(gr_basic_block_sptr block) +{ + std::stringstream msg; + + // Check if duplicate + if (std::find(d_blocks.begin(), d_blocks.end(), block) != d_blocks.end()) { + msg << "Block " << block << " already connected."; + throw std::invalid_argument(msg.str()); + } + + // Check if has inputs or outputs + if (block->input_signature()->max_streams() != 0 || + block->output_signature()->max_streams() != 0) { + msg << "Block " << block << " must not have any input or output ports"; + throw std::invalid_argument(msg.str()); + } + + d_blocks.push_back(block); +} + void gr_hier_block2_detail::connect(gr_basic_block_sptr src, int src_port, gr_basic_block_sptr dst, int dst_port) @@ -100,6 +121,21 @@ gr_hier_block2_detail::connect(gr_basic_block_sptr src, int src_port, // TODO: connects to NC } +void +gr_hier_block2_detail::disconnect(gr_basic_block_sptr block) +{ + for (gr_basic_block_viter_t p = d_blocks.begin(); p != d_blocks.end(); p++) { + if (*p == block) { + d_blocks.erase(p); + return; + } + } + + std::stringstream msg; + msg << "cannot disconnect block " << block << ", not found"; + throw std::invalid_argument(msg.str()); +} + void gr_hier_block2_detail::disconnect(gr_basic_block_sptr src, int src_port, gr_basic_block_sptr dst, int dst_port) @@ -252,6 +288,15 @@ gr_hier_block2_detail::resolve_port(int port, bool is_input) return result; } +void +gr_hier_block2_detail::disconnect_all() +{ + d_fg->clear(); + d_blocks.clear(); + d_inputs.clear(); + d_outputs.clear(); +} + gr_endpoint gr_hier_block2_detail::resolve_endpoint(const gr_endpoint &endp, bool is_input) const { @@ -294,7 +339,15 @@ gr_hier_block2_detail::flatten_aux(gr_flat_flowgraph_sptr sfg) const sfg->connect(src_endp, dst_endp); } - gr_basic_block_vector_t blocks = d_fg->calc_used_blocks(); + // Construct unique list of blocks used either in edges or + // by themselves. I hate STL. + gr_basic_block_vector_t blocks, tmp = d_fg->calc_used_blocks(); + std::insert_iterator<gr_basic_block_vector_t> inserter(blocks, blocks.begin()); + std::vector<gr_basic_block_sptr>::const_iterator p; // Because flatten_aux is const + for (p = d_blocks.begin(); p != d_blocks.end(); p++) + tmp.push_back(*p); + sort(tmp.begin(), tmp.end()); + unique_copy(tmp.begin(), tmp.end(), inserter); // Recurse hierarchical children for (gr_basic_block_viter_t p = blocks.begin(); p != blocks.end(); p++) { diff --git a/gnuradio-core/src/lib/runtime/gr_hier_block2_detail.h b/gnuradio-core/src/lib/runtime/gr_hier_block2_detail.h index b692d10801..d31ae93e7e 100644 --- a/gnuradio-core/src/lib/runtime/gr_hier_block2_detail.h +++ b/gnuradio-core/src/lib/runtime/gr_hier_block2_detail.h @@ -27,37 +27,37 @@ class gr_hier_block2_detail : boost::noncopyable { -private: - friend class gr_hier_block2; - friend class gr_runtime_impl; - - // Constructor--it's private, only friends can instantiate - gr_hier_block2_detail(gr_hier_block2 *owner); - - // Private implementation data - gr_hier_block2 *d_owner; - gr_hier_block2_detail *d_parent_detail; - gr_flowgraph_sptr d_fg; - gr_endpoint_vector_t d_inputs; - gr_endpoint_vector_t d_outputs; +public: + gr_hier_block2_detail(gr_hier_block2 *owner); + ~gr_hier_block2_detail(); - // Private implementation methods - void connect(gr_basic_block_sptr src, int src_port, - gr_basic_block_sptr dst, int dst_port); - void disconnect(gr_basic_block_sptr, int src_port, - gr_basic_block_sptr, int dst_port); - void connect_input(int my_port, int port, gr_basic_block_sptr block); - void connect_output(int my_port, int port, gr_basic_block_sptr block); - void disconnect_input(int my_port, int port, gr_basic_block_sptr block); - void disconnect_output(int my_port, int port, gr_basic_block_sptr block); - void flatten_aux(gr_flat_flowgraph_sptr sfg) const; - gr_endpoint resolve_port(int port, bool is_input); - gr_endpoint resolve_endpoint(const gr_endpoint &endp, bool is_input) const; - void lock(); - void unlock(); + void connect(gr_basic_block_sptr block); + void connect(gr_basic_block_sptr src, int src_port, + gr_basic_block_sptr dst, int dst_port); + void disconnect(gr_basic_block_sptr block); + void disconnect(gr_basic_block_sptr, int src_port, + gr_basic_block_sptr, int dst_port); + void disconnect_all(); + void lock(); + void unlock(); + void flatten_aux(gr_flat_flowgraph_sptr sfg) const; -public: - ~gr_hier_block2_detail(); +private: + + // Private implementation data + gr_hier_block2 *d_owner; + gr_hier_block2_detail *d_parent_detail; + gr_flowgraph_sptr d_fg; + gr_endpoint_vector_t d_inputs; + gr_endpoint_vector_t d_outputs; + gr_basic_block_vector_t d_blocks; + + void connect_input(int my_port, int port, gr_basic_block_sptr block); + void connect_output(int my_port, int port, gr_basic_block_sptr block); + void disconnect_input(int my_port, int port, gr_basic_block_sptr block); + void disconnect_output(int my_port, int port, gr_basic_block_sptr block); + gr_endpoint resolve_port(int port, bool is_input); + gr_endpoint resolve_endpoint(const gr_endpoint &endp, bool is_input) const; }; #endif /* INCLUDED_GR_HIER_BLOCK2_DETAIL_H */ diff --git a/gnuradio-core/src/lib/runtime/gr_top_block.cc b/gnuradio-core/src/lib/runtime/gr_top_block.cc index 91248d3474..10e3772055 100644 --- a/gnuradio-core/src/lib/runtime/gr_top_block.cc +++ b/gnuradio-core/src/lib/runtime/gr_top_block.cc @@ -88,3 +88,9 @@ gr_top_block::unlock() { d_impl->unlock(); } + +bool +gr_top_block::is_running() +{ + return d_impl->is_running(); +} diff --git a/gnuradio-core/src/lib/runtime/gr_top_block.h b/gnuradio-core/src/lib/runtime/gr_top_block.h index d74903841e..57c36ad3be 100644 --- a/gnuradio-core/src/lib/runtime/gr_top_block.h +++ b/gnuradio-core/src/lib/runtime/gr_top_block.h @@ -97,6 +97,11 @@ public: * reconfiguration happens. */ virtual void unlock(); + + /*! + * Returns true if flowgraph is running + */ + bool is_running(); }; #endif /* INCLUDED_GR_TOP_BLOCK_H */ diff --git a/gnuradio-core/src/lib/runtime/gr_top_block.i b/gnuradio-core/src/lib/runtime/gr_top_block.i index 63ceec8b2f..78c2e0b95e 100644 --- a/gnuradio-core/src/lib/runtime/gr_top_block.i +++ b/gnuradio-core/src/lib/runtime/gr_top_block.i @@ -46,6 +46,7 @@ public: void run(); void lock(); void unlock(); + bool is_running(); }; %{ diff --git a/gnuradio-core/src/lib/runtime/gr_top_block_impl.h b/gnuradio-core/src/lib/runtime/gr_top_block_impl.h index 8052ce4fab..00cb7f9791 100644 --- a/gnuradio-core/src/lib/runtime/gr_top_block_impl.h +++ b/gnuradio-core/src/lib/runtime/gr_top_block_impl.h @@ -53,6 +53,9 @@ public: // Unlock the top block at end of reconfiguration void unlock(); + // Return true if flowgraph is running + bool is_running() const { return d_running; } + private: bool d_running; diff --git a/gnuradio-core/src/python/gnuradio/Makefile.am b/gnuradio-core/src/python/gnuradio/Makefile.am index d9815b5230..388681e550 100644 --- a/gnuradio-core/src/python/gnuradio/Makefile.am +++ b/gnuradio-core/src/python/gnuradio/Makefile.am @@ -21,7 +21,7 @@ include $(top_srcdir)/Makefile.common -SUBDIRS = gr gru gruimpl blks blksimpl blks2 blksimpl2 vocoder +SUBDIRS = gr gru gruimpl blks blksimpl blks2 blks2impl vocoder grpython_PYTHON = \ __init__.py \ diff --git a/gnuradio-core/src/python/gnuradio/blks2/__init__.py b/gnuradio-core/src/python/gnuradio/blks2/__init__.py index 227e2bf7f3..89ebb92299 100644 --- a/gnuradio-core/src/python/gnuradio/blks2/__init__.py +++ b/gnuradio-core/src/python/gnuradio/blks2/__init__.py @@ -27,11 +27,11 @@ import os.path # to manually update this file. for p in __path__: - filenames = glob.glob (os.path.join (p, "..", "blksimpl2", "*.py")) + filenames = glob.glob (os.path.join (p, "..", "blks2impl", "*.py")) for f in filenames: f = os.path.basename(f).lower() f = f[:-3] if f == '__init__': continue # print f - exec "from gnuradio.blksimpl2.%s import *" % (f,) + exec "from gnuradio.blks2impl.%s import *" % (f,) diff --git a/gnuradio-core/src/python/gnuradio/blksimpl2/Makefile.am b/gnuradio-core/src/python/gnuradio/blks2impl/Makefile.am index 3e63510339..3fb23caef3 100644 --- a/gnuradio-core/src/python/gnuradio/blksimpl2/Makefile.am +++ b/gnuradio-core/src/python/gnuradio/blks2impl/Makefile.am @@ -1,5 +1,5 @@ # -# Copyright 2005 Free Software Foundation, Inc. +# Copyright 2005,2007 Free Software Foundation, Inc. # # This file is part of GNU Radio # @@ -24,18 +24,41 @@ include $(top_srcdir)/Makefile.common # EXTRA_DIST = run_tests.in # TESTS = run_tests -grblkspythondir = $(grpythondir)/blksimpl2 +grblkspythondir = $(grpythondir)/blks2impl grblkspython_PYTHON = \ __init__.py \ + am_demod.py \ + channel_model.py \ dbpsk.py \ dqpsk.py \ d8psk.py \ filterbank.py \ + fm_demod.py \ + fm_emph.py \ gmsk.py \ + cpm.py \ + nbfm_rx.py \ + nbfm_tx.py \ + ofdm.py \ + ofdm_receiver.py \ + ofdm_sync_fixed.py \ + ofdm_sync_ml.py \ + ofdm_sync_pnac.py \ + ofdm_sync_pn.py \ pkt.py \ psk.py \ - rational_resampler.py + qam.py \ + qam8.py \ + qam16.py \ + qam64.py \ + qam256.py \ + rational_resampler.py \ + standard_squelch.py \ + wfm_rcv.py \ + wfm_rcv_pll.py \ + wfm_tx.py + noinst_PYTHON = diff --git a/gnuradio-core/src/python/gnuradio/blksimpl2/__init__.py b/gnuradio-core/src/python/gnuradio/blks2impl/__init__.py index a4917cf64c..a4917cf64c 100644 --- a/gnuradio-core/src/python/gnuradio/blksimpl2/__init__.py +++ b/gnuradio-core/src/python/gnuradio/blks2impl/__init__.py diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/am_demod.py b/gnuradio-core/src/python/gnuradio/blks2impl/am_demod.py new file mode 100644 index 0000000000..b454f0942d --- /dev/null +++ b/gnuradio-core/src/python/gnuradio/blks2impl/am_demod.py @@ -0,0 +1,76 @@ +# +# Copyright 2006,2007 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. +# + +from gnuradio import gr, optfir + +class am_demod_cf(gr.hier_block2): + """ + Generalized AM demodulation block with audio filtering. + + This block demodulates a band-limited, complex down-converted AM + channel into the the original baseband signal, applying low pass + filtering to the audio output. It produces a float stream in the + range [-1.0, +1.0]. + + @param channel_rate: incoming sample rate of the AM baseband + @type sample_rate: integer + @param audio_decim: input to output decimation rate + @type audio_decim: integer + @param audio_pass: audio low pass filter passband frequency + @type audio_pass: float + @param audio_stop: audio low pass filter stop frequency + @type audio_stop: float + """ + def __init__(self, channel_rate, audio_decim, audio_pass, audio_stop): + gr.hier_block2.__init__(self, "am_demod_cf", + gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature + gr.io_signature(1, 1, gr.sizeof_float)) # Input signature + + MAG = gr.complex_to_mag() + DCR = gr.add_const_ff(-1.0) + + audio_taps = optfir.low_pass(0.5, # Filter gain + channel_rate, # Sample rate + audio_pass, # Audio passband + audio_stop, # Audio stopband + 0.1, # Passband ripple + 60) # Stopband attenuation + LPF = gr.fir_filter_fff(audio_decim, audio_taps) + + self.connect(self, MAG, DCR, LPF, self) + +class demod_10k0a3e_cf(am_demod_cf): + """ + AM demodulation block, 10 KHz channel. + + This block demodulates an AM channel conformant to 10K0A3E emission + standards, such as broadcast band AM transmissions. + + @param channel_rate: incoming sample rate of the AM baseband + @type sample_rate: integer + @param audio_decim: input to output decimation rate + @type audio_decim: integer + """ + def __init__(self, channel_rate, audio_decim): + am_demod_cf.__init__(self, channel_rate, audio_decim, + 5000, # Audio passband + 5500) # Audio stopband +
\ No newline at end of file diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/channel_model.py b/gnuradio-core/src/python/gnuradio/blks2impl/channel_model.py new file mode 100644 index 0000000000..21980a22e5 --- /dev/null +++ b/gnuradio-core/src/python/gnuradio/blks2impl/channel_model.py @@ -0,0 +1,59 @@ +#!/usr/bin/env python +# +# Copyright 2007 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. +# + +from gnuradio import gr + +class channel_model(gr.hier_block): + def __init__(self, fg, noise_voltage=0.0, frequency_offset=0.0, epsilon=1.0, taps=[1.0,0.0]): + ''' Creates a channel model that includes: + - AWGN noise power in terms of noise voltage + - A frequency offest in the channel in ratio + - A timing offset ratio to model clock difference (epsilon) + - Multipath taps + ''' + + print epsilon + self.timing_offset = gr.fractional_interpolator_cc(0, epsilon) + + self.multipath = gr.fir_filter_ccc(1, taps) + + self.noise_adder = gr.add_cc() + self.noise = gr.noise_source_c(gr.GR_GAUSSIAN,noise_voltage) + self.freq_offset = gr.sig_source_c(1, gr.GR_SIN_WAVE, frequency_offset, 1.0, 0.0) + self.mixer_offset = gr.multiply_cc() + + fg.connect(self.timing_offset, self.multipath) + fg.connect(self.multipath, (self.mixer_offset,0)) + fg.connect(self.freq_offset,(self.mixer_offset,1)) + fg.connect(self.mixer_offset, (self.noise_adder,1)) + fg.connect(self.noise, (self.noise_adder,0)) + + gr.hier_block.__init__(self, fg, self.timing_offset, self.noise_adder) + + def set_noise_voltage(noise_voltage): + self.noise.set_amplitude(noise_voltage) + + def set_frequency_offset(frequency_offset): + self.freq_offset.set_frequency(frequency_offset) + + def set_taps(taps): + self.multipath.set_taps(taps) diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/cpm.py b/gnuradio-core/src/python/gnuradio/blks2impl/cpm.py new file mode 100644 index 0000000000..8f593cd51e --- /dev/null +++ b/gnuradio-core/src/python/gnuradio/blks2impl/cpm.py @@ -0,0 +1,249 @@ +# +# CPM modulation and demodulation. +# +# +# Copyright 2005,2006,2007 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. +# + +# See gnuradio-examples/python/digital for examples + +from gnuradio import gr +from gnuradio import modulation_utils +from math import pi +import numpy +from pprint import pprint +import inspect + +# default values (used in __init__ and add_options) +_def_samples_per_symbol = 2 +_def_bits_per_symbol = 1 +_def_h_numerator = 1 +_def_h_denominator = 2 +_def_cpm_type = 0 # 0=CPFSK, 1=GMSK, 2=RC, 3=GENERAL +_def_bt = 0.35 +_def_symbols_per_pulse = 1 +_def_generic_taps = numpy.empty(1) +_def_verbose = False +_def_log = False + + +# ///////////////////////////////////////////////////////////////////////////// +# CPM modulator +# ///////////////////////////////////////////////////////////////////////////// + +class cpm_mod(gr.hier_block2): + def __init__(self, + samples_per_symbol=_def_samples_per_symbol, + bits_per_symbol=_def_bits_per_symbol, + h_numerator=_def_h_numerator, + h_denominator=_def_h_denominator, + cpm_type=_def_cpm_type, + bt=_def_bt, + symbols_per_pulse=_def_symbols_per_pulse, + generic_taps=_def_generic_taps, + verbose=_def_verbose, + log=_def_log): + """ + Hierarchical block for Continuous Phase + modulation. + + The input is a byte stream (unsigned char) + representing packed bits and the + output is the complex modulated signal at baseband. + + See Proakis for definition of generic CPM signals: + s(t)=exp(j phi(t)) + phi(t)= 2 pi h int_0^t f(t') dt' + f(t)=sum_k a_k g(t-kT) + (normalizing assumption: int_0^infty g(t) dt = 1/2) + + @param samples_per_symbol: samples per baud >= 2 + @type samples_per_symbol: integer + @param bits_per_symbol: bits per symbol + @type bits_per_symbol: integer + @param h_numerator: numerator of modulation index + @type h_numerator: integer + @param h_denominator: denominator of modulation index (numerator and denominator must be relative primes) + @type h_denominator: integer + @param cpm_type: supported types are: 0=CPFSK, 1=GMSK, 2=RC, 3=GENERAL + @type cpm_type: integer + @param bt: bandwidth symbol time product for GMSK + @type bt: float + @param symbols_per_pulse: shaping pulse duration in symbols + @type symbols_per_pulse: integer + @param generic_taps: define a generic CPM pulse shape (sum = samples_per_symbol/2) + @type generic_taps: array of floats + + @param verbose: Print information about modulator? + @type verbose: bool + @param debug: Print modulation data to files? + @type debug: bool + """ + + gr.hier_block2.__init__("cpm_mod", + gr.io_signature(1, 1, gr.sizeof_char), # Input signature + gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature + + self._samples_per_symbol = samples_per_symbol + self._bits_per_symbol = bits_per_symbol + self._h_numerator = h_numerator + self._h_denominator = h_denominator + self._cpm_type = cpm_type + self._bt=bt + if cpm_type == 0 or cpm_type == 2 or cpm_type == 3: # CPFSK, RC, Generic + self._symbols_per_pulse = symbols_per_pulse + elif cpm_type == 1: # GMSK + self._symbols_per_pulse = 4 + else: + raise TypeError, ("cpm_type must be an integer in {0,1,2,3}, is %r" % (cpm_type,)) + + self._generic_taps=numpy.array(generic_taps) + + if not isinstance(samples_per_symbol, int) or samples_per_symbol < 2: + raise TypeError, ("samples_per_symbol must be an integer >= 2, is %r" % (samples_per_symbol,)) + + self.nsymbols = 2**bits_per_symbol + self.sym_alphabet=numpy.arange(-(self.nsymbols-1),self.nsymbols,2) + + + self.ntaps = self._symbols_per_pulse * samples_per_symbol + sensitivity = 2 * pi * h_numerator / h_denominator / samples_per_symbol + + # Unpack Bytes into bits_per_symbol groups + self.B2s = gr.packed_to_unpacked_bb(bits_per_symbol,gr.GR_MSB_FIRST) + + + # Turn it into symmetric PAM data. + self.pam = gr.chunks_to_symbols_bf(self.sym_alphabet,1) + + # Generate pulse (sum of taps = samples_per_symbol/2) + if cpm_type == 0: # CPFSK + self.taps= (1.0/self._symbols_per_pulse/2,) * self.ntaps + elif cpm_type == 1: # GMSK + gaussian_taps = gr.firdes.gaussian( + 1.0/2, # gain + samples_per_symbol, # symbol_rate + bt, # bandwidth * symbol time + self.ntaps # number of taps + ) + sqwave = (1,) * samples_per_symbol # rectangular window + self.taps = numpy.convolve(numpy.array(gaussian_taps),numpy.array(sqwave)) + elif cpm_type == 2: # Raised Cosine + # generalize it for arbitrary roll-off factor + self.taps = (1-numpy.cos(2*pi*numpy.arange(0,self.ntaps)/samples_per_symbol/self._symbols_per_pulse))/(2*self._symbols_per_pulse) + elif cpm_type == 3: # Generic CPM + self.taps = generic_taps + else: + raise TypeError, ("cpm_type must be an integer in {0,1,2,3}, is %r" % (cpm_type,)) + + self.filter = gr.interp_fir_filter_fff(samples_per_symbol, self.taps) + + # FM modulation + self.fmmod = gr.frequency_modulator_fc(sensitivity) + + if verbose: + self._print_verbage() + + if log: + self._setup_logging() + + # Connect + self.connect(self, self.B2s, self.pam, self.filter, self.fmmod, self) + + #def samples_per_symbol(self): + #return self._samples_per_symbol + + #def bits_per_symbol(self): + #return self._bits_per_symbol + + #def h_numerator(self): + #return self._h_numerator + + #def h_denominator(self): + #return self._h_denominator + + #def cpm_type(self): + #return self._cpm_type + + #def bt(self): + #return self._bt + + #def symbols_per_pulse(self): + #return self._symbols_per_pulse + + + def _print_verbage(self): + print "Samples per symbol = %d" % self._samples_per_symbol + print "Bits per symbol = %d" % self._bits_per_symbol + print "h = " , self._h_numerator , " / " , self._h_denominator + print "Symbol alphabet = " , self.sym_alphabet + print "Symbols per pulse = %d" % self._symbols_per_pulse + print "taps = " , self.taps + + print "CPM type = %d" % self._cpm_type + if self._cpm_type == 1: + print "Gaussian filter BT = %.2f" % self._bt + + + def _setup_logging(self): + print "Modulation logging turned on." + self.connect(self.B2s, + gr.file_sink(gr.sizeof_float, "symbols.dat")) + self.connect(self.pam, + gr.file_sink(gr.sizeof_float, "pam.dat")) + self.connect(self.filter, + gr.file_sink(gr.sizeof_float, "filter.dat")) + self.connect(self.fmmod, + gr.file_sink(gr.sizeof_gr_complex, "fmmod.dat")) + + + def add_options(parser): + """ + Adds CPM modulation-specific options to the standard parser + """ + parser.add_option("", "--bt", type="float", default=_def_bt, + help="set bandwidth-time product [default=%default] (GMSK)") + add_options=staticmethod(add_options) + + + def extract_kwargs_from_options(options): + """ + Given command line options, create dictionary suitable for passing to __init__ + """ + return modulation_utils.extract_kwargs_from_options(cpm_mod.__init__, + ('self',), options) + extract_kwargs_from_options=staticmethod(extract_kwargs_from_options) + + + +# ///////////////////////////////////////////////////////////////////////////// +# CPM demodulator +# ///////////////////////////////////////////////////////////////////////////// +# +# Not yet implemented +# + + + +# +# Add these to the mod/demod registry +# +modulation_utils.add_type_1_mod('cpm', cpm_mod) +#modulation_utils.add_type_1_demod('cpm', cpm_demod) diff --git a/gnuradio-core/src/python/gnuradio/blksimpl2/d8psk.py b/gnuradio-core/src/python/gnuradio/blks2impl/d8psk.py index f5461653d4..67cf9f5696 100644 --- a/gnuradio-core/src/python/gnuradio/blksimpl2/d8psk.py +++ b/gnuradio-core/src/python/gnuradio/blks2impl/d8psk.py @@ -38,14 +38,14 @@ _def_gray_code = True _def_verbose = False _def_log = False -_def_costas_alpha = 0.01 -_def_gain_mu = 0.05 +_def_costas_alpha = 0.175 +_def_gain_mu = 0.175 _def_mu = 0.5 _def_omega_relative_limit = 0.005 # ///////////////////////////////////////////////////////////////////////////// -# DQPSK modulator +# D8PSK modulator # ///////////////////////////////////////////////////////////////////////////// class d8psk_mod(gr.hier_block2): @@ -74,10 +74,10 @@ class d8psk_mod(gr.hier_block2): @type debug: bool """ - gr.hier_block2.__init__(self, "d8psk_mod", - gr.io_signature(1,1,gr.sizeof_char), # Input signature - gr.io_signature(1,1,gr.sizeof_gr_complex)) # Output signature - + gr.hier_block2.__init__(self, "d8psk_mod", + gr.io_signature(1, 1, gr.sizeof_char), # Input signature + gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature + self._samples_per_symbol = samples_per_symbol self._excess_bw = excess_bw self._gray_code = gray_code @@ -114,16 +114,15 @@ class d8psk_mod(gr.hier_block2): self.rrc_filter = gr.interp_fir_filter_ccf(self._samples_per_symbol, self.rrc_taps) - # Connect components - self.connect(self, self.bytes2chunks, self.symbol_mapper, self.chunks2symbols, - self.rrc_filter, self) - if verbose: self._print_verbage() if log: self._setup_logging() + # Connect & Initialize base class + self.connect(self, self.bytes2chunks, self.symbol_mapper, self.diffenc, + self.chunks2symbols, self.rrc_filter, self) def samples_per_symbol(self): return self._samples_per_symbol @@ -133,17 +132,22 @@ class d8psk_mod(gr.hier_block2): bits_per_symbol = staticmethod(bits_per_symbol) # make it a static method. RTFM def _print_verbage(self): - print "\nModulator:" print "bits per symbol = %d" % self.bits_per_symbol() print "Gray code = %s" % self._gray_code print "RS roll-off factor = %f" % self._excess_bw def _setup_logging(self): print "Modulation logging turned on." - self.connect(self.bytes2chunks, gr.file_sink(gr.sizeof_char, "tx_bytes2chunks.dat")) - self.connect(self.symbol_mapper, gr.file_sink(gr.sizeof_char, "tx_symbol_mapper.dat")) - self.connect(self.chunks2symbols, gr.file_sink(gr.sizeof_gr_complex, "tx_chunks2symbols.dat")) - self.connect(self.rrc_filter, gr.file_sink(gr.sizeof_gr_complex, "tx_rrc_filter.dat")) + self.connect(self.bytes2chunks, + gr.file_sink(gr.sizeof_char, "tx_bytes2chunks.dat")) + self.connect(self.symbol_mapper, + gr.file_sink(gr.sizeof_char, "tx_graycoder.dat")) + self.connect(self.diffenc, + gr.file_sink(gr.sizeof_char, "tx_diffenc.dat")) + self.connect(self.chunks2symbols, + gr.file_sink(gr.sizeof_gr_complex, "tx_chunks2symbols.dat")) + self.connect(self.rrc_filter, + gr.file_sink(gr.sizeof_gr_complex, "tx_rrc_filter.dat")) def add_options(parser): """ @@ -162,7 +166,7 @@ class d8psk_mod(gr.hier_block2): Given command line options, create dictionary suitable for passing to __init__ """ return modulation_utils.extract_kwargs_from_options(d8psk_mod.__init__, - ('self', 'fg'), options) + ('self',), options) extract_kwargs_from_options=staticmethod(extract_kwargs_from_options) @@ -172,7 +176,6 @@ class d8psk_mod(gr.hier_block2): # Differentially coherent detection of differentially encoded 8psk # ///////////////////////////////////////////////////////////////////////////// -WITH_SYNC = False class d8psk_demod(gr.hier_block2): def __init__(self, @@ -210,10 +213,10 @@ class d8psk_demod(gr.hier_block2): @param debug: Print modualtion data to files? @type debug: bool """ - - gr.hier_block2.__init__(self, "d8psk_demod", - gr.io_signature(1,1,gr.sizeof_gr_complex), # Input signature - gr.io_signature(1,1,gr.sizeof_char)) # Output signature + + gr.hier_block2.__init__(self, "d8psk_demod", + gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature + gr.io_signature(1, 1, gr.sizeof_char)) # Output signature self._samples_per_symbol = samples_per_symbol self._excess_bw = excess_bw @@ -231,8 +234,9 @@ class d8psk_demod(gr.hier_block2): # Automatic gain control scale = (1.0/16384.0) self.pre_scaler = gr.multiply_const_cc(scale) # scale the signal from full-range to +-1 - #self.agc = gr.agc2_cc(0.6e-1, 1e-3, 1, 1, 100) - self.agc = gr.feedforward_agc_cc(16, 1.0) + #self.agc = gr.agc_cc(1e-2, 1, 1, 100) + self.agc = gr.agc2_cc(1e-1, 1e-2, 1, 1, 100) + #self.agc = gr.feedforward_agc_cc(16, 1.0) # RRC data filter ntaps = 11 * samples_per_symbol @@ -248,17 +252,18 @@ class d8psk_demod(gr.hier_block2): self._mm_omega = self._samples_per_symbol self._mm_gain_omega = .25 * self._mm_gain_mu * self._mm_gain_mu self._costas_beta = 0.25 * self._costas_alpha * self._costas_alpha - fmin = -0.05 - fmax = 0.05 + fmin = -0.025 + fmax = 0.025 self.receiver=gr.mpsk_receiver_cc(arity, 0, - self._costas_alpha, self._costas_beta, - fmin, fmax, - self._mm_mu, self._mm_gain_mu, - self._mm_omega, self._mm_gain_omega, - self._mm_omega_relative_limit) + self._costas_alpha, self._costas_beta, + fmin, fmax, + self._mm_mu, self._mm_gain_mu, + self._mm_omega, self._mm_gain_omega, + self._mm_omega_relative_limit) - #self.diffdec = gr.diff_decoder_bb(arity) + # Perform Differential decoding on the constellation + self.diffdec = gr.diff_phasor_cc() # find closest constellation point rot = 1 @@ -274,17 +279,15 @@ class d8psk_demod(gr.hier_block2): # unpack the k bit vector into a stream of bits self.unpack = gr.unpack_k_bits_bb(self.bits_per_symbol()) - - # Connect and Initialize base class - self.connect(self, self.pre_scaler, self.agc, self.rrc_filter, self.receiver, - self.slicer, self.symbol_mapper, self.unpack, self) - if verbose: self._print_verbage() if log: self._setup_logging() - + + # Connect + self.connect(self, self.pre_scaler, self.agc, self.rrc_filter, self.receiver, + self.diffdec, self.slicer, self.symbol_mapper, self.unpack, self) def samples_per_symbol(self): return self._samples_per_symbol @@ -308,14 +311,23 @@ class d8psk_demod(gr.hier_block2): def _setup_logging(self): - print "Demodulation logging turned on." - self.connect(self.pre_scaler, gr.file_sink(gr.sizeof_gr_complex, "rx_prescaler.dat")) - self.connect(self.agc, gr.file_sink(gr.sizeof_gr_complex, "rx_agc.dat")) - self.connect(self.rrc_filter, gr.file_sink(gr.sizeof_gr_complex, "rx_rrc_filter.dat")) - self.connect(self.receiver, gr.file_sink(gr.sizeof_gr_complex, "rx_receiver.dat")) - self.connect(self.slicer, gr.file_sink(gr.sizeof_char, "rx_slicer.dat")) - self.connect(self.symbol_mapper, gr.file_sink(gr.sizeof_char, "rx_symbol_mapper.dat")) - self.connect(self.unpack, gr.file_sink(gr.sizeof_char, "rx_unpack.dat")) + print "Modulation logging turned on." + self.connect(self.pre_scaler, + gr.file_sink(gr.sizeof_gr_complex, "rx_prescaler.dat")) + self.connect(self.agc, + gr.file_sink(gr.sizeof_gr_complex, "rx_agc.dat")) + self.connect(self.rrc_filter, + gr.file_sink(gr.sizeof_gr_complex, "rx_rrc_filter.dat")) + self.connect(self.receiver, + gr.file_sink(gr.sizeof_gr_complex, "rx_receiver.dat")) + self.connect(self.diffdec, + gr.file_sink(gr.sizeof_gr_complex, "rx_diffdec.dat")) + self.connect(self.slicer, + gr.file_sink(gr.sizeof_char, "rx_slicer.dat")) + self.connect(self.symbol_mapper, + gr.file_sink(gr.sizeof_char, "rx_gray_decoder.dat")) + self.connect(self.unpack, + gr.file_sink(gr.sizeof_char, "rx_unpack.dat")) def add_options(parser): """ @@ -326,7 +338,7 @@ class d8psk_demod(gr.hier_block2): parser.add_option("", "--no-gray-code", dest="gray_code", action="store_false", default=_def_gray_code, help="disable gray coding on modulated bits (PSK)") - parser.add_option("", "--costas-alpha", type="float", default=None, + parser.add_option("", "--costas-alpha", type="float", default=_def_costas_alpha, help="set Costas loop alpha value [default=%default] (PSK)") parser.add_option("", "--gain-mu", type="float", default=_def_gain_mu, help="set M&M symbol sync loop gain mu value [default=%default] (PSK)") @@ -339,7 +351,7 @@ class d8psk_demod(gr.hier_block2): Given command line options, create dictionary suitable for passing to __init__ """ return modulation_utils.extract_kwargs_from_options( - d8psk_demod.__init__, ('self', 'fg'), options) + d8psk_demod.__init__, ('self',), options) extract_kwargs_from_options=staticmethod(extract_kwargs_from_options) @@ -347,5 +359,5 @@ class d8psk_demod(gr.hier_block2): # Add these to the mod/demod registry # # NOT READY TO BE USED YET -- ENABLE AT YOUR OWN RISK -#modulation_utils.add_type_1_mod('d8psk', d8psk_mod) -#modulation_utils.add_type_1_demod('d8psk', d8psk_demod) +modulation_utils.add_type_1_mod('d8psk', d8psk_mod) +modulation_utils.add_type_1_demod('d8psk', d8psk_demod) diff --git a/gnuradio-core/src/python/gnuradio/blksimpl2/dbpsk.py b/gnuradio-core/src/python/gnuradio/blks2impl/dbpsk.py index 90b7632c27..27063767c9 100644 --- a/gnuradio-core/src/python/gnuradio/blksimpl2/dbpsk.py +++ b/gnuradio-core/src/python/gnuradio/blks2impl/dbpsk.py @@ -38,8 +38,8 @@ _def_gray_code = True _def_verbose = False _def_log = False -_def_costas_alpha = 0.15 -_def_gain_mu = 0.1 +_def_costas_alpha = 0.1 +_def_gain_mu = None _def_mu = 0.5 _def_omega_relative_limit = 0.005 @@ -49,6 +49,7 @@ _def_omega_relative_limit = 0.005 # ///////////////////////////////////////////////////////////////////////////// class dbpsk_mod(gr.hier_block2): + def __init__(self, samples_per_symbol=_def_samples_per_symbol, excess_bw=_def_excess_bw, @@ -73,9 +74,9 @@ class dbpsk_mod(gr.hier_block2): @type log: bool """ - gr.hier_block2.__init__(self, "dbpsk_mod", - gr.io_signature(1,1,gr.sizeof_char), # Input signature - gr.io_signature(1,1,gr.sizeof_gr_complex)) # Output signature + gr.hier_block2.__init__(self, "dbpsk_mod", + gr.io_signature(1, 1, gr.sizeof_char), # Input signature + gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature self._samples_per_symbol = samples_per_symbol self._excess_bw = excess_bw @@ -112,15 +113,16 @@ class dbpsk_mod(gr.hier_block2): self.rrc_filter = gr.interp_fir_filter_ccf(self._samples_per_symbol, self.rrc_taps) - # Connect components - self.connect(self, self.bytes2chunks, self.symbol_mapper, self.diffenc, - self.chunks2symbols, self.rrc_filter, self) + # Connect + self.connect(self, self.bytes2chunks, self.symbol_mapper, self.diffenc, + self.chunks2symbols, self.rrc_filter, self) if verbose: self._print_verbage() if log: self._setup_logging() + def samples_per_symbol(self): return self._samples_per_symbol @@ -145,23 +147,28 @@ class dbpsk_mod(gr.hier_block2): Given command line options, create dictionary suitable for passing to __init__ """ return modulation_utils.extract_kwargs_from_options(dbpsk_mod.__init__, - ('self', 'fg'), options) + ('self',), options) extract_kwargs_from_options=staticmethod(extract_kwargs_from_options) def _print_verbage(self): print "\nModulator:" - print "bits per symbol = %d" % self.bits_per_symbol() - print "Gray code = %s" % self._gray_code - print "RRC roll-off factor = %.2f" % self._excess_bw + print "bits per symbol: %d" % self.bits_per_symbol() + print "Gray code: %s" % self._gray_code + print "RRC roll-off factor: %.2f" % self._excess_bw def _setup_logging(self): print "Modulation logging turned on." - self.connect(self.bytes2chunks, gr.file_sink(gr.sizeof_char, "tx_bytes2chunks.dat")) - self.connect(self.symbol_mapper, gr.file_sink(gr.sizeof_char, "tx_symbol_mapper.dat")) - self.connect(self.diffenc, gr.file_sink(gr.sizeof_char, "tx_diffenc.dat")) - self.connect(self.chunks2symbols, gr.file_sink(gr.sizeof_gr_complex, "tx_chunks2symbols.dat")) - self.connect(self.rrc_filter, gr.file_sink(gr.sizeof_gr_complex, "tx_rrc_filter.dat")) + self.connect(self.bytes2chunks, + gr.file_sink(gr.sizeof_char, "tx_bytes2chunks.dat")) + self.connect(self.symbol_mapper, + gr.file_sink(gr.sizeof_char, "tx_graycoder.dat")) + self.connect(self.diffenc, + gr.file_sink(gr.sizeof_char, "tx_diffenc.dat")) + self.connect(self.chunks2symbols, + gr.file_sink(gr.sizeof_gr_complex, "tx_chunks2symbols.dat")) + self.connect(self.rrc_filter, + gr.file_sink(gr.sizeof_gr_complex, "tx_rrc_filter.dat")) # ///////////////////////////////////////////////////////////////////////////// @@ -207,12 +214,11 @@ class dbpsk_demod(gr.hier_block2): @param debug: Print modualtion data to files? @type debug: bool """ - - gr.hier_block2.__init__(self, "dbpsk_demod", - gr.io_signature(1,1,gr.sizeof_gr_complex), # Input signature - gr.io_signature(1,1,gr.sizeof_char)) # Output signature - + gr.hier_block2.__init__(self, "dbpsk_demod", + gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature + gr.io_signature(1, 1, gr.sizeof_char)) # Output signature + self._samples_per_symbol = samples_per_symbol self._excess_bw = excess_bw self._costas_alpha = costas_alpha @@ -230,9 +236,8 @@ class dbpsk_demod(gr.hier_block2): scale = (1.0/16384.0) self.pre_scaler = gr.multiply_const_cc(scale) # scale the signal from full-range to +-1 #self.agc = gr.agc2_cc(0.6e-1, 1e-3, 1, 1, 100) - self.agc = gr.feedforward_agc_cc(16, 1.0) + self.agc = gr.feedforward_agc_cc(16, 2.0) - # RRC data filter ntaps = 11 * samples_per_symbol self.rrc_taps = gr.firdes.root_raised_cosine( @@ -244,20 +249,23 @@ class dbpsk_demod(gr.hier_block2): self.rrc_filter=gr.interp_fir_filter_ccf(1, self.rrc_taps) # symbol clock recovery + if not self._mm_gain_mu: + self._mm_gain_mu = 0.1 + self._mm_omega = self._samples_per_symbol self._mm_gain_omega = .25 * self._mm_gain_mu * self._mm_gain_mu self._costas_beta = 0.25 * self._costas_alpha * self._costas_alpha - fmin = -0.02 - fmax = 0.02 + fmin = -0.025 + fmax = 0.025 self.receiver=gr.mpsk_receiver_cc(arity, 0, - self._costas_alpha, self._costas_beta, - fmin, fmax, - self._mm_mu, self._mm_gain_mu, - self._mm_omega, self._mm_gain_omega, - self._mm_omega_relative_limit) + self._costas_alpha, self._costas_beta, + fmin, fmax, + self._mm_mu, self._mm_gain_mu, + self._mm_omega, self._mm_gain_omega, + self._mm_omega_relative_limit) - # Using differential decoding + # Do differential decoding based on phase change of symbols self.diffdec = gr.diff_phasor_cc() # find closest constellation point @@ -273,16 +281,16 @@ class dbpsk_demod(gr.hier_block2): # unpack the k bit vector into a stream of bits self.unpack = gr.unpack_k_bits_bb(self.bits_per_symbol()) - # Connect and Initialize base class - self.connect(self, self.pre_scaler, self.agc, self.rrc_filter, self.receiver, - self.diffdec, self.slicer, self.symbol_mapper, self.unpack, self) - if verbose: self._print_verbage() if log: self._setup_logging() + # Connect and Initialize base class + self.connect(self, self.pre_scaler, self.agc, self.rrc_filter, self.receiver, + self.diffdec, self.slicer, self.symbol_mapper, self.unpack, self) + def samples_per_symbol(self): return self._samples_per_symbol @@ -304,15 +312,23 @@ class dbpsk_demod(gr.hier_block2): print "M&M omega limit: %.2f" % self._mm_omega_relative_limit def _setup_logging(self): - print "Demodulation logging turned on." - self.connect(self.pre_scaler, gr.file_sink(gr.sizeof_gr_complex, "rx_prescaler.dat")) - self.connect(self.agc, gr.file_sink(gr.sizeof_gr_complex, "rx_agc.dat")) - self.connect(self.rrc_filter, gr.file_sink(gr.sizeof_gr_complex, "rx_rrc_filter.dat")) - self.connect(self.receiver, gr.file_sink(gr.sizeof_gr_complex, "rx_receiver.dat")) - self.connect(self.diffdec, gr.file_sink(gr.sizeof_gr_complex, "rx_diffdec.dat")) - self.connect(self.slicer, gr.file_sink(gr.sizeof_char, "rx_slicer.dat")) - self.connect(self.symbol_mapper, gr.file_sink(gr.sizeof_char, "rx_symbol_mapper.dat")) - self.connect(self.unpack, gr.file_sink(gr.sizeof_char, "rx_unpack.dat")) + print "Modulation logging turned on." + self.connect(self.pre_scaler, + gr.file_sink(gr.sizeof_gr_complex, "rx_prescaler.dat")) + self.connect(self.agc, + gr.file_sink(gr.sizeof_gr_complex, "rx_agc.dat")) + self.connect(self.rrc_filter, + gr.file_sink(gr.sizeof_gr_complex, "rx_rrc_filter.dat")) + self.connect(self.receiver, + gr.file_sink(gr.sizeof_gr_complex, "rx_receiver.dat")) + self.connect(self.diffdec, + gr.file_sink(gr.sizeof_gr_complex, "rx_diffdec.dat")) + self.connect(self.slicer, + gr.file_sink(gr.sizeof_char, "rx_slicer.dat")) + self.connect(self.symbol_mapper, + gr.file_sink(gr.sizeof_char, "rx_symbol_mapper.dat")) + self.connect(self.unpack, + gr.file_sink(gr.sizeof_char, "rx_unpack.dat")) def add_options(parser): """ @@ -338,7 +354,7 @@ class dbpsk_demod(gr.hier_block2): Given command line options, create dictionary suitable for passing to __init__ """ return modulation_utils.extract_kwargs_from_options( - dbpsk_demod.__init__, ('self'), options) + dbpsk_demod.__init__, ('self',), options) extract_kwargs_from_options=staticmethod(extract_kwargs_from_options) # # Add these to the mod/demod registry diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/digital_voice.py.real b/gnuradio-core/src/python/gnuradio/blks2impl/digital_voice.py.real new file mode 100644 index 0000000000..6ec66825c1 --- /dev/null +++ b/gnuradio-core/src/python/gnuradio/blks2impl/digital_voice.py.real @@ -0,0 +1,102 @@ +#!/usr/bin/env python +# +# Copyright 2005 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. +# + +""" +Digital voice Tx and Rx using GSM 13kbit vocoder and GMSK. + +Runs channel at 32kbit/sec. Currently uses fake channel coding, +but there's room for a rate 1/2 coder. +""" + +from gnuradio import gr, gru +from gnuradio.blksimpl.gmsk import gmsk_mod, gmsk_demod + +from gnuradio.vocoder import gsm_full_rate + +# Size of gsm full rate speech encoder output packet in bytes + +GSM_FRAME_SIZE = 33 + +# Size of packet in bytes that we send to GMSK modulator: +# +# Target: 256kS/sec air rate. +# +# 256kS 1 sym 1 bit 1 byte 0.020 sec 80 bytes +# ---- * ----- * ----- * ------ * --------- = -------- +# sec 8 S 1 sym 8 bits frame frame +# +# gr_simple_framer add 10 bytes of overhead. + +AIR_FRAME_SIZE = 70 + + +class digital_voice_tx(gr.hier_block): + """ + Hierarchical block for digital voice tranmission. + + The input is 8kS/sec floating point audio in the range [-1,+1] + The output is 256kS/sec GMSK modulated complex baseband signal in the range [-1,+1]. + """ + def __init__(self, fg): + samples_per_symbol = 8 + symbol_rate = 32000 + bt = 0.3 # Gaussian filter bandwidth * symbol time + + src_scale = gr.multiply_const_ff(32767) + f2s = gr.float_to_short() + voice_coder = gsm_full_rate.encode_sp() + + channel_coder = gr.fake_channel_encoder_pp(GSM_FRAME_SIZE, AIR_FRAME_SIZE) + p2s = gr.parallel_to_serial(gr.sizeof_char, AIR_FRAME_SIZE) + + mod = gmsk_mod(fg, sps=samples_per_symbol, + symbol_rate=symbol_rate, bt=bt, + p_size=AIR_FRAME_SIZE) + + fg.connect(src_scale, f2s, voice_coder, channel_coder, p2s, mod) + gr.hier_block.__init__(self, fg, src_scale, mod) + + +class digital_voice_rx(gr.hier_block): + """ + Hierarchical block for digital voice reception. + + The input is 256kS/sec GMSK modulated complex baseband signal. + The output is 8kS/sec floating point audio in the range [-1,+1] + """ + def __init__(self, fg): + samples_per_symbol = 8 + symbol_rate = 32000 + + demod = gmsk_demod(fg, sps=samples_per_symbol, + symbol_rate=symbol_rate, + p_size=AIR_FRAME_SIZE) + + s2p = gr.serial_to_parallel(gr.sizeof_char, AIR_FRAME_SIZE) + channel_decoder = gr.fake_channel_decoder_pp(AIR_FRAME_SIZE, GSM_FRAME_SIZE) + + voice_decoder = gsm_full_rate.decode_ps() + s2f = gr.short_to_float () + sink_scale = gr.multiply_const_ff(1.0/32767.) + + fg.connect(demod, s2p, channel_decoder, voice_decoder, s2f, sink_scale) + gr.hier_block.__init__(self, fg, demod, sink_scale) diff --git a/gnuradio-core/src/python/gnuradio/blksimpl2/dqpsk.py b/gnuradio-core/src/python/gnuradio/blks2impl/dqpsk.py index cc82cd2fe6..8c15d21734 100644 --- a/gnuradio-core/src/python/gnuradio/blksimpl2/dqpsk.py +++ b/gnuradio-core/src/python/gnuradio/blks2impl/dqpsk.py @@ -39,7 +39,7 @@ _def_verbose = False _def_log = False _def_costas_alpha = 0.15 -_def_gain_mu = 0.1 +_def_gain_mu = None _def_mu = 0.5 _def_omega_relative_limit = 0.005 @@ -49,6 +49,7 @@ _def_omega_relative_limit = 0.005 # ///////////////////////////////////////////////////////////////////////////// class dqpsk_mod(gr.hier_block2): + def __init__(self, samples_per_symbol=_def_samples_per_symbol, excess_bw=_def_excess_bw, @@ -73,9 +74,9 @@ class dqpsk_mod(gr.hier_block2): @type debug: bool """ - gr.hier_block2.__init__(self, "dqpsk_mod", - gr.io_signature(1,1,gr.sizeof_char), # Input signature - gr.io_signature(1,1,gr.sizeof_gr_complex)) # Output signature + gr.hier_block2.__init__(self, "dqpsk_mod", + gr.io_signature(1, 1, gr.sizeof_char), # Input signature + gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature self._samples_per_symbol = samples_per_symbol self._excess_bw = excess_bw @@ -112,16 +113,16 @@ class dqpsk_mod(gr.hier_block2): ntaps) self.rrc_filter = gr.interp_fir_filter_ccf(self._samples_per_symbol, self.rrc_taps) - - # Connect components - self.connect(self, self.bytes2chunks, self.symbol_mapper, self.diffenc, - self.chunks2symbols, self.rrc_filter, self) if verbose: self._print_verbage() if log: self._setup_logging() + + # Connect & Initialize base class + self.connect(self, self.bytes2chunks, self.symbol_mapper, self.diffenc, + self.chunks2symbols, self.rrc_filter, self) def samples_per_symbol(self): return self._samples_per_symbol @@ -132,17 +133,22 @@ class dqpsk_mod(gr.hier_block2): def _print_verbage(self): print "\nModulator:" - print "bits per symbol = %d" % self.bits_per_symbol() - print "Gray code = %s" % self._gray_code - print "RRS roll-off factor = %f" % self._excess_bw + print "bits per symbol: %d" % self.bits_per_symbol() + print "Gray code: %s" % self._gray_code + print "RRS roll-off factor: %f" % self._excess_bw def _setup_logging(self): print "Modulation logging turned on." - self.connect(self.bytes2chunks, gr.file_sink(gr.sizeof_char, "tx_bytes2chunks.dat")) - self.connect(self.symbol_mapper, gr.file_sink(gr.sizeof_char, "tx_symbol_mapper.dat")) - self.connect(self.diffenc, gr.file_sink(gr.sizeof_char, "tx_diffenc.dat")) - self.connect(self.chunks2symbols, gr.file_sink(gr.sizeof_gr_complex, "tx_chunks2symbols.dat")) - self.connect(self.rrc_filter, gr.file_sink(gr.sizeof_gr_complex, "tx_rrc_filter.dat")) + self.connect(self.bytes2chunks, + gr.file_sink(gr.sizeof_char, "tx_bytes2chunks.dat")) + self.connect(self.symbol_mapper, + gr.file_sink(gr.sizeof_char, "tx_graycoder.dat")) + self.connect(self.diffenc, + gr.file_sink(gr.sizeof_char, "tx_diffenc.dat")) + self.connect(self.chunks2symbols, + gr.file_sink(gr.sizeof_gr_complex, "tx_chunks2symbols.dat")) + self.connect(self.rrc_filter, + gr.file_sink(gr.sizeof_gr_complex, "tx_rrc_filter.dat")) def add_options(parser): """ @@ -161,7 +167,7 @@ class dqpsk_mod(gr.hier_block2): Given command line options, create dictionary suitable for passing to __init__ """ return modulation_utils.extract_kwargs_from_options(dqpsk_mod.__init__, - ('self', 'fg'), options) + ('self',), options) extract_kwargs_from_options=staticmethod(extract_kwargs_from_options) @@ -173,7 +179,7 @@ class dqpsk_mod(gr.hier_block2): class dqpsk_demod(gr.hier_block2): - def __init__(self, + def __init__(self, samples_per_symbol=_def_samples_per_symbol, excess_bw=_def_excess_bw, costas_alpha=_def_costas_alpha, @@ -209,9 +215,9 @@ class dqpsk_demod(gr.hier_block2): @type debug: bool """ - gr.hier_block2.__init__(self, "dqpsk_demod", - gr.io_signature(1,1,gr.sizeof_gr_complex), # Input signature - gr.io_signature(1,1,gr.sizeof_char)) # Output signature + gr.hier_block2.__init__(self, "dqpsk_demod", + gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature + gr.io_signature(1, 1, gr.sizeof_char)) # Output signature self._samples_per_symbol = samples_per_symbol self._excess_bw = excess_bw @@ -229,6 +235,7 @@ class dqpsk_demod(gr.hier_block2): # Automatic gain control scale = (1.0/16384.0) self.pre_scaler = gr.multiply_const_cc(scale) # scale the signal from full-range to +-1 + #self.agc = gr.agc2_cc(0.6e-1, 1e-3, 1, 1, 100) self.agc = gr.feedforward_agc_cc(16, 2.0) # RRC data filter @@ -241,23 +248,26 @@ class dqpsk_demod(gr.hier_block2): ntaps) self.rrc_filter=gr.interp_fir_filter_ccf(1, self.rrc_taps) - # symbol clock recovery + if not self._mm_gain_mu: + sbs_to_mm = {2: 0.050, 3: 0.075, 4: 0.11, 5: 0.125, 6: 0.15, 7: 0.15} + self._mm_gain_mu = sbs_to_mm[samples_per_symbol] + self._mm_omega = self._samples_per_symbol self._mm_gain_omega = .25 * self._mm_gain_mu * self._mm_gain_mu self._costas_beta = 0.25 * self._costas_alpha * self._costas_alpha - fmin = -0.01 - fmax = 0.01 + fmin = -0.025 + fmax = 0.025 self.receiver=gr.mpsk_receiver_cc(arity, pi/4.0, - self._costas_alpha, self._costas_beta, - fmin, fmax, - self._mm_mu, self._mm_gain_mu, - self._mm_omega, self._mm_gain_omega, - self._mm_omega_relative_limit) - + self._costas_alpha, self._costas_beta, + fmin, fmax, + self._mm_mu, self._mm_gain_mu, + self._mm_omega, self._mm_gain_omega, + self._mm_omega_relative_limit) + # Perform Differential decoding on the constellation self.diffdec = gr.diff_phasor_cc() - + # find closest constellation point rot = 1 rotated_const = map(lambda pt: pt * rot, psk.constellation[arity]) @@ -271,15 +281,15 @@ class dqpsk_demod(gr.hier_block2): # unpack the k bit vector into a stream of bits self.unpack = gr.unpack_k_bits_bb(self.bits_per_symbol()) - # Connect and Initialize base class - self.connect(self, self.pre_scaler, self.agc, self.rrc_filter, self.receiver, self.diffdec, - self.slicer, self.symbol_mapper, self.unpack, self) - if verbose: self._print_verbage() if log: self._setup_logging() + + # Connect & Initialize base class + self.connect(self, self.pre_scaler, self.agc, self.rrc_filter, self.receiver, + self.diffdec, self.slicer, self.symbol_mapper, self.unpack, self) def samples_per_symbol(self): return self._samples_per_symbol @@ -302,15 +312,23 @@ class dqpsk_demod(gr.hier_block2): print "M&M omega limit: %.2f" % self._mm_omega_relative_limit def _setup_logging(self): - print "Demodulation logging turned on." - self.connect(self.pre_scaler, gr.file_sink(gr.sizeof_gr_complex, "rx_prescaler.dat")) - self.connect(self.agc, gr.file_sink(gr.sizeof_gr_complex, "rx_agc.dat")) - self.connect(self.rrc_filter, gr.file_sink(gr.sizeof_gr_complex, "rx_rrc_filter.dat")) - self.connect(self.receiver, gr.file_sink(gr.sizeof_gr_complex, "rx_receiver.dat")) - self.connect(self.diffdec, gr.file_sink(gr.sizeof_gr_complex, "rx_diffdec.dat")) - self.connect(self.slicer, gr.file_sink(gr.sizeof_char, "rx_slicer.dat")) - self.connect(self.symbol_mapper, gr.file_sink(gr.sizeof_char, "rx_symbol_mapper.dat")) - self.connect(self.unpack, gr.file_sink(gr.sizeof_char, "rx_unpack.dat")) + print "Modulation logging turned on." + self.connect(self.pre_scaler, + gr.file_sink(gr.sizeof_gr_complex, "rx_prescaler.dat")) + self.connect(self.agc, + gr.file_sink(gr.sizeof_gr_complex, "rx_agc.dat")) + self.connect(self.rrc_filter, + gr.file_sink(gr.sizeof_gr_complex, "rx_rrc_filter.dat")) + self.connect(self.receiver, + gr.file_sink(gr.sizeof_gr_complex, "rx_receiver.dat")) + self.connect(self.diffdec, + gr.file_sink(gr.sizeof_gr_complex, "rx_diffdec.dat")) + self.connect(self.slicer, + gr.file_sink(gr.sizeof_char, "rx_slicer.dat")) + self.connect(self.symbol_mapper, + gr.file_sink(gr.sizeof_char, "rx_gray_decoder.dat")) + self.connect(self.unpack, + gr.file_sink(gr.sizeof_char, "rx_unpack.dat")) def add_options(parser): """ @@ -321,7 +339,7 @@ class dqpsk_demod(gr.hier_block2): parser.add_option("", "--no-gray-code", dest="gray_code", action="store_false", default=_def_gray_code, help="disable gray coding on modulated bits (PSK)") - parser.add_option("", "--costas-alpha", type="float", default=None, + parser.add_option("", "--costas-alpha", type="float", default=_def_costas_alpha, help="set Costas loop alpha value [default=%default] (PSK)") parser.add_option("", "--gain-mu", type="float", default=_def_gain_mu, help="set M&M symbol sync loop gain mu value [default=%default] (PSK)") @@ -334,7 +352,7 @@ class dqpsk_demod(gr.hier_block2): Given command line options, create dictionary suitable for passing to __init__ """ return modulation_utils.extract_kwargs_from_options( - dqpsk_demod.__init__, ('self', 'fg'), options) + dqpsk_demod.__init__, ('self',), options) extract_kwargs_from_options=staticmethod(extract_kwargs_from_options) diff --git a/gnuradio-core/src/python/gnuradio/blksimpl2/filterbank.py b/gnuradio-core/src/python/gnuradio/blks2impl/filterbank.py index 0cff78bef3..c1284565f3 100644 --- a/gnuradio-core/src/python/gnuradio/blksimpl2/filterbank.py +++ b/gnuradio-core/src/python/gnuradio/blks2impl/filterbank.py @@ -1,5 +1,5 @@ # -# Copyright 2005 Free Software Foundation, Inc. +# Copyright 2005,2007 Free Software Foundation, Inc. # # This file is part of GNU Radio # @@ -45,7 +45,6 @@ class synthesis_filterbank(gr.hier_block2): Takes M complex streams in, produces single complex stream out that runs at M times the input sample rate - @param fg: flow_graph @param mpoints: number of freq bins/interpolation factor/subbands @param taps: filter taps for subband filter @@ -83,9 +82,10 @@ class synthesis_filterbank(gr.hier_block2): utility. """ item_size = gr.sizeof_gr_complex - gr.hier_block2.__init__(self, "synthesis_filterbank", - gr.io_signature(mpoints, mpoints, item_size), - gr.io_signature(1, 1, item_size)) + gr.hier_block2.__init__(self, "synthesis_filterbank", + gr.io_signature(mpoints, mpoints, item_size), # Input signature + gr.io_signature(1, 1, item_size)) # Output signature + if taps is None: taps = _generate_synthesis_taps(mpoints) @@ -104,9 +104,9 @@ class synthesis_filterbank(gr.hier_block2): # mpoints filters go in here... self.ss2s = gr.streams_to_stream(item_size, mpoints) - for i in range(mpoints): - self.connect((self, i), (self.ss2v, i)) - + for i in range(mpoints): + self.connect((self, i), (self.ss2v, i)) + self.connect(self.ss2v, self.ifft, self.v2ss, self) # build mpoints fir filters... @@ -127,17 +127,16 @@ class analysis_filterbank(gr.hier_block2): Takes 1 complex stream in, produces M complex streams out that runs at 1/M times the input sample rate - @param fg: flow_graph @param mpoints: number of freq bins/interpolation factor/subbands @param taps: filter taps for subband filter Same channel to frequency mapping as described above. """ item_size = gr.sizeof_gr_complex - gr.hier_block2.__init__(self, "analysis_filterbank", - gr.io_signature(1, 1, item_size), - gr.io_signature(mpoints, mpoints, item_size)) - + gr.hier_block2.__init__(self, "analysis_filterbank", + gr.io_signature(1, 1, item_size), # Input signature + gr.io_signature(mpoints, mpoints, item_size)) # Output signature + if taps is None: taps = _generate_synthesis_taps(mpoints) @@ -157,18 +156,13 @@ class analysis_filterbank(gr.hier_block2): self.fft = gr.fft_vcc(mpoints, True, []) self.v2ss = gr.vector_to_streams(item_size, mpoints) - self.connect(self, self.s2ss) - + self.connect(self, self.s2ss) + # build mpoints fir filters... for i in range(mpoints): f = gr.fft_filter_ccc(1, sub_taps[mpoints-i-1]) self.connect((self.s2ss, i), f) self.connect(f, (self.ss2v, i)) - + self.connect((self.v2ss, i), (self, i)) + self.connect(self.ss2v, self.fft, self.v2ss) - - for i in range(mpoints): - self.connect((self.v2ss, i), (self, i)) - - - diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/fm_demod.py b/gnuradio-core/src/python/gnuradio/blks2impl/fm_demod.py new file mode 100644 index 0000000000..1910b50117 --- /dev/null +++ b/gnuradio-core/src/python/gnuradio/blks2impl/fm_demod.py @@ -0,0 +1,111 @@ +# +# Copyright 2006,2007 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. +# + +from gnuradio import gr, optfir +from gnuradio.blks2impl.fm_emph import fm_deemph +from math import pi + +class fm_demod_cf(gr.hier_block2): + """ + Generalized FM demodulation block with deemphasis and audio + filtering. + + This block demodulates a band-limited, complex down-converted FM + channel into the the original baseband signal, optionally applying + deemphasis. Low pass filtering is done on the resultant signal. It + produces an output float strem in the range of [-1.0, +1.0]. + + @param channel_rate: incoming sample rate of the FM baseband + @type sample_rate: integer + @param deviation: maximum FM deviation (default = 5000) + @type deviation: float + @param audio_decim: input to output decimation rate + @type audio_decim: integer + @param audio_pass: audio low pass filter passband frequency + @type audio_pass: float + @param audio_stop: audio low pass filter stop frequency + @type audio_stop: float + @param gain: gain applied to audio output (default = 1.0) + @type gain: float + @param tau: deemphasis time constant (default = 75e-6), specify 'None' + to prevent deemphasis + """ + def __init__(self, channel_rate, audio_decim, deviation, + audio_pass, audio_stop, gain=1.0, tau=75e-6): + gr.hier_block2.__init__(self, "fm_demod_cf", + gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature + gr.io_signature(1, 1, gr.sizeof_float)) # Output signature + + k = channel_rate/(2*pi*deviation) + QUAD = gr.quadrature_demod_cf(k) + + audio_taps = optfir.low_pass(gain, # Filter gain + channel_rate, # Sample rate + audio_pass, # Audio passband + audio_stop, # Audio stopband + 0.1, # Passband ripple + 60) # Stopband attenuation + LPF = gr.fir_filter_fff(audio_decim, audio_taps) + + if tau is not None: + DEEMPH = fm_deemph(channel_rate, tau) + self.connect(self, QUAD, DEEMPH, LPF, self) + else: + self.connect(self, QUAD, LPF, self) + +class demod_20k0f3e_cf(fm_demod_cf): + """ + NBFM demodulation block, 20 KHz channels + + This block demodulates a complex, downconverted, narrowband FM + channel conforming to 20K0F3E emission standards, outputting + floats in the range [-1.0, +1.0]. + + @param sample_rate: incoming sample rate of the FM baseband + @type sample_rate: integer + @param audio_decim: input to output decimation rate + @type audio_decim: integer + """ + def __init__(self, channel_rate, audio_decim): + fm_demod_cf.__init__(self, channel_rate, audio_decim, + 5000, # Deviation + 3000, # Audio passband frequency + 4000) # Audio stopband frequency + +class demod_200kf3e_cf(fm_demod_cf): + """ + WFM demodulation block, mono. + + This block demodulates a complex, downconverted, wideband FM + channel conforming to 200KF3E emission standards, outputting + floats in the range [-1.0, +1.0]. + + @param sample_rate: incoming sample rate of the FM baseband + @type sample_rate: integer + @param audio_decim: input to output decimation rate + @type audio_decim: integer + """ + def __init__(self, channel_rate, audio_decim): + fm_demod_cf.__init__(self, channel_rate, audio_decim, + 75000, # Deviation + 15000, # Audio passband + 16000, # Audio stopband + 20.0) # Audio gain diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/fm_emph.py b/gnuradio-core/src/python/gnuradio/blks2impl/fm_emph.py new file mode 100644 index 0000000000..fd19f5fd99 --- /dev/null +++ b/gnuradio-core/src/python/gnuradio/blks2impl/fm_emph.py @@ -0,0 +1,151 @@ +# +# Copyright 2005,2007 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. +# + +from gnuradio import gr +import math + + +# +# 1 +# H(s) = ------- +# 1 + s +# +# tau is the RC time constant. +# critical frequency: w_p = 1/tau +# +# We prewarp and use the bilinear z-transform to get our IIR coefficients. +# See "Digital Signal Processing: A Practical Approach" by Ifeachor and Jervis +# + +class fm_deemph(gr.hier_block2): + """ + FM Deemphasis IIR filter. + """ + + + def __init__(self, fs, tau=75e-6): + """ + @param fs: sampling frequency in Hz + @type fs: float + @param tau: Time constant in seconds (75us in US, 50us in EUR) + @type tau: float + """ + gr.hier_block2.__init__(self, "fm_deemph", + gr.io_signature(1, 1, gr.sizeof_float), # Input signature + gr.io_signature(1, 1, gr.sizeof_float)) # Output signature + + w_p = 1/tau + w_pp = math.tan (w_p / (fs * 2)) # prewarped analog freq + + a1 = (w_pp - 1)/(w_pp + 1) + b0 = w_pp/(1 + w_pp) + b1 = b0 + + btaps = [b0, b1] + ataps = [1, a1] + + if 0: + print "btaps =", btaps + print "ataps =", ataps + global plot1 + plot1 = gru.gnuplot_freqz (gru.freqz (btaps, ataps), fs, True) + + deemph = gr.iir_filter_ffd(btaps, ataps) + self.connect(self, deemph, self) + +# +# 1 + s*t1 +# H(s) = ---------- +# 1 + s*t2 +# +# I think this is the right transfer function. +# +# +# This fine ASCII rendition is based on Figure 5-15 +# in "Digital and Analog Communication Systems", Leon W. Couch II +# +# +# R1 +# +-----||------+ +# | | +# o------+ +-----+--------o +# | C1 | | +# +----/\/\/\/--+ \ +# / +# \ R2 +# / +# \ +# | +# o--------------------------+--------o +# +# f1 = 1/(2*pi*t1) = 1/(2*pi*R1*C) +# +# 1 R1 + R2 +# f2 = ------- = ------------ +# 2*pi*t2 2*pi*R1*R2*C +# +# t1 is 75us in US, 50us in EUR +# f2 should be higher than our audio bandwidth. +# +# +# The Bode plot looks like this: +# +# +# /---------------- +# / +# / <-- slope = 20dB/decade +# / +# -------------/ +# f1 f2 +# +# We prewarp and use the bilinear z-transform to get our IIR coefficients. +# See "Digital Signal Processing: A Practical Approach" by Ifeachor and Jervis +# + +class fm_preemph(gr.hier_block2): + """ + FM Preemphasis IIR filter. + """ + def __init__(self, fs, tau=75e-6): + """ + @param fs: sampling frequency in Hz + @type fs: float + @param tau: Time constant in seconds (75us in US, 50us in EUR) + @type tau: float + """ + + gr.hier_block2.__init__(self, "fm_deemph", + gr.io_signature(1, 1, gr.sizeof_float), # Input signature + gr.io_signature(1, 1, gr.sizeof_float)) # Output signature + + # FIXME make this compute the right answer + + btaps = [1] + ataps = [1] + + if 0: + print "btaps =", btaps + print "ataps =", ataps + global plot2 + plot2 = gru.gnuplot_freqz (gru.freqz (btaps, ataps), fs, True) + + preemph = gr.iir_filter_ffd(btaps, ataps) + self.connect(self, preemph, self) diff --git a/gnuradio-core/src/python/gnuradio/blksimpl2/gmsk.py b/gnuradio-core/src/python/gnuradio/blks2impl/gmsk.py index d1cf55c7ff..3b6c016a0b 100644 --- a/gnuradio-core/src/python/gnuradio/blksimpl2/gmsk.py +++ b/gnuradio-core/src/python/gnuradio/blks2impl/gmsk.py @@ -37,7 +37,7 @@ _def_bt = 0.35 _def_verbose = False _def_log = False -_def_gain_mu = 0.05 +_def_gain_mu = None _def_mu = 0.5 _def_freq_error = 0.0 _def_omega_relative_limit = 0.005 @@ -71,9 +71,9 @@ class gmsk_mod(gr.hier_block2): @type debug: bool """ - gr.hier_block2.__init__(self, "gmsk_mod", - gr.io_signature(1,1,gr.sizeof_char), # Input signature - gr.io_signature(1,1,gr.sizeof_gr_complex)) # Output signature + gr.hier_block2.__init__(self, "gmsk_mod", + gr.io_signature(1, 1, gr.sizeof_char), # Input signature + gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature self._samples_per_symbol = samples_per_symbol self._bt = bt @@ -103,15 +103,15 @@ class gmsk_mod(gr.hier_block2): # FM modulation self.fmmod = gr.frequency_modulator_fc(sensitivity) - # Connect components - self.connect(self, self.nrz, self.gaussian_filter, self.fmmod, self) - if verbose: self._print_verbage() if log: self._setup_logging() + # Connect & Initialize base class + self.connect(self, self.nrz, self.gaussian_filter, self.fmmod, self) + def samples_per_symbol(self): return self._samples_per_symbol @@ -127,9 +127,13 @@ class gmsk_mod(gr.hier_block2): def _setup_logging(self): print "Modulation logging turned on." - self.connect(self.nrz, gr.file_sink(gr.sizeof_float, "tx_nrz.dat")) - self.connect(self.gaussian_filter, gr.file_sink(gr.sizeof_float, "tx_gaussian_filter.dat")) - self.connect(self.fmmod, gr.file_sink(gr.sizeof_gr_complex, "tx_fmmod.dat")) + self.connect(self.nrz, + gr.file_sink(gr.sizeof_float, "nrz.dat")) + self.connect(self.gaussian_filter, + gr.file_sink(gr.sizeof_float, "gaussian_filter.dat")) + self.connect(self.fmmod, + gr.file_sink(gr.sizeof_gr_complex, "fmmod.dat")) + def add_options(parser): """ @@ -145,7 +149,7 @@ class gmsk_mod(gr.hier_block2): Given command line options, create dictionary suitable for passing to __init__ """ return modulation_utils.extract_kwargs_from_options(gmsk_mod.__init__, - ('self', 'fg'), options) + ('self',), options) extract_kwargs_from_options=staticmethod(extract_kwargs_from_options) @@ -190,9 +194,9 @@ class gmsk_demod(gr.hier_block2): @param float """ - gr.hier_block2.__init__(self, "gmsk_demod", - gr.io_signature(1,1,gr.sizeof_gr_complex), # Input signature - gr.io_signature(1,1,gr.sizeof_char)) # Output signature + gr.hier_block2.__init__(self, "gmsk_demod", + gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature + gr.io_signature(1, 1, gr.sizeof_char)) # Output signature self._samples_per_symbol = samples_per_symbol self._gain_mu = gain_mu @@ -205,6 +209,9 @@ class gmsk_demod(gr.hier_block2): self._omega = samples_per_symbol*(1+self._freq_error) + if not self._gain_mu: + self._gain_mu = 0.175 + self._gain_omega = .25 * self._gain_mu * self._gain_mu # critically damped # Demodulate FM @@ -220,15 +227,15 @@ class gmsk_demod(gr.hier_block2): # slice the floats at 0, outputting 1 bit (the LSB of the output byte) per sample self.slicer = gr.binary_slicer_fb() - # Connect components - self.connect(self, self.fmdemod, self.clock_recovery, self.slicer, self) - if verbose: self._print_verbage() if log: self._setup_logging() + # Connect & Initialize base class + self.connect(self, self.fmdemod, self.clock_recovery, self.slicer, self) + def samples_per_symbol(self): return self._samples_per_symbol @@ -236,6 +243,7 @@ class gmsk_demod(gr.hier_block2): return 1 bits_per_symbol = staticmethod(bits_per_symbol) # make it a static method. + def _print_verbage(self): print "bits per symbol = %d" % self.bits_per_symbol() print "M&M clock recovery omega = %f" % self._omega @@ -247,9 +255,12 @@ class gmsk_demod(gr.hier_block2): def _setup_logging(self): print "Demodulation logging turned on." - self.connect(self.fmdemod, gr.file_sink(gr.sizeof_float, "rx_fmdemod.dat")) - self.connect(self.clock_recovery, gr.file_sink(gr.sizeof_float, "rx_clock_recovery.dat")) - self.connect(self.slicer, gr.file_sink(gr.sizeof_char, "rx_slicer.dat")) + self.connect(self.fmdemod, + gr.file_sink(gr.sizeof_float, "fmdemod.dat")) + self.connect(self.clock_recovery, + gr.file_sink(gr.sizeof_float, "clock_recovery.dat")) + self.connect(self.slicer, + gr.file_sink(gr.sizeof_char, "slicer.dat")) def add_options(parser): """ @@ -270,7 +281,7 @@ class gmsk_demod(gr.hier_block2): Given command line options, create dictionary suitable for passing to __init__ """ return modulation_utils.extract_kwargs_from_options(gmsk_demod.__init__, - ('self', 'fg'), options) + ('self',), options) extract_kwargs_from_options=staticmethod(extract_kwargs_from_options) diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/nbfm_rx.py b/gnuradio-core/src/python/gnuradio/blks2impl/nbfm_rx.py new file mode 100644 index 0000000000..8a1704000a --- /dev/null +++ b/gnuradio-core/src/python/gnuradio/blks2impl/nbfm_rx.py @@ -0,0 +1,88 @@ +# +# Copyright 2005 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. +# + +import math +from gnuradio import gr, optfir +from gnuradio.blks2impl.fm_emph import fm_deemph +#from gnuradio.blks2impl.standard_squelch import standard_squelch + +class nbfm_rx(gr.hier_block2): + def __init__(self, audio_rate, quad_rate, tau=75e-6, max_dev=5e3): + """ + Narrow Band FM Receiver. + + Takes a single complex baseband input stream and produces a single + float output stream of audio sample in the range [-1, +1]. + + @param audio_rate: sample rate of audio stream, >= 16k + @type audio_rate: integer + @param quad_rate: sample rate of output stream + @type quad_rate: integer + @param tau: preemphasis time constant (default 75e-6) + @type tau: float + @param max_dev: maximum deviation in Hz (default 5e3) + @type max_dev: float + + quad_rate must be an integer multiple of audio_rate. + + Exported sub-blocks (attributes): + squelch + quad_demod + deemph + audio_filter + """ + + gr.hier_block2.__init__(self, "nbfm_rx", + gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature + gr.io_signature(1, 1, gr.sizeof_float)) # Output signature + + # FIXME audio_rate and quad_rate ought to be exact rationals + audio_rate = int(audio_rate) + quad_rate = int(quad_rate) + + if quad_rate % audio_rate != 0: + raise ValueError, "quad_rate is not an integer multiple of audio_rate" + + squelch_threshold = 20 # dB + #self.squelch = gr.simple_squelch_cc(squelch_threshold, 0.001) + + # FM Demodulator input: complex; output: float + k = quad_rate/(2*math.pi*max_dev) + self.quad_demod = gr.quadrature_demod_cf(k) + + # FM Deemphasis IIR filter + self.deemph = fm_deemph (quad_rate, tau=tau) + + # compute FIR taps for audio filter + audio_decim = quad_rate // audio_rate + audio_taps = gr.firdes.low_pass (1.0, # gain + quad_rate, # sampling rate + 4.5e3, # Audio LPF cutoff + 2.5e3, # Transition band + gr.firdes.WIN_HAMMING) # filter type + + print "len(audio_taps) =", len(audio_taps) + + # Decimating audio filter + # input: float; output: float; taps: float + self.audio_filter = gr.fir_filter_fff(audio_decim, audio_taps) + + self.connect(self, self.quad_demod, self.deemph, self.audio_filter, self) diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/nbfm_tx.py b/gnuradio-core/src/python/gnuradio/blks2impl/nbfm_tx.py new file mode 100644 index 0000000000..15818c2043 --- /dev/null +++ b/gnuradio-core/src/python/gnuradio/blks2impl/nbfm_tx.py @@ -0,0 +1,92 @@ +# +# Copyright 2005 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. +# + +import math +from gnuradio import gr, optfir +from gnuradio.blks2impl.fm_emph import fm_preemph + +#from gnuradio import ctcss + +class nbfm_tx(gr.hier_block2): + def __init__(self, audio_rate, quad_rate, tau=75e-6, max_dev=5e3): + """ + Narrow Band FM Transmitter. + + Takes a single float input stream of audio samples in the range [-1,+1] + and produces a single FM modulated complex baseband output. + + @param audio_rate: sample rate of audio stream, >= 16k + @type audio_rate: integer + @param quad_rate: sample rate of output stream + @type quad_rate: integer + @param tau: preemphasis time constant (default 75e-6) + @type tau: float + @param max_dev: maximum deviation in Hz (default 5e3) + @type max_dev: float + + quad_rate must be an integer multiple of audio_rate. + """ + + gr.hier_block2.__init__(self, "nbfm_tx", + gr.io_signature(1, 1, gr.sizeof_float), # Input signature + gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature + + # FIXME audio_rate and quad_rate ought to be exact rationals + audio_rate = int(audio_rate) + quad_rate = int(quad_rate) + + if quad_rate % audio_rate != 0: + raise ValueError, "quad_rate is not an integer multiple of audio_rate" + + + do_interp = audio_rate != quad_rate + + if do_interp: + interp_factor = quad_rate / audio_rate + interp_taps = optfir.low_pass (interp_factor, # gain + quad_rate, # Fs + 4500, # passband cutoff + 7000, # stopband cutoff + 0.1, # passband ripple dB + 40) # stopband atten dB + + #print "len(interp_taps) =", len(interp_taps) + self.interpolator = gr.interp_fir_filter_fff (interp_factor, interp_taps) + + self.preemph = fm_preemph (quad_rate, tau=tau) + + k = 2 * math.pi * max_dev / quad_rate + self.modulator = gr.frequency_modulator_fc (k) + + if do_interp: + self.connect (self, self.interpolator, self.preemph, self.modulator, self) + else: + self.connect(self, self.preemph, self.modulator, self) + + +class ctcss_gen_f(gr.hier_block2): + def __init__(self, sample_rate, tone_freq): + gr.hier_block2.__init__(self, "ctcss_gen_f", + gr.io_signature(0, 0, 0), # Input signature + gr.io_signature(1, 1, gr.sizeof_float)) # Output signature + + self.plgen = gr.sig_source_f(sample_rate, gr.GR_SIN_WAVE, tone_freq, 0.1, 0.0) + self.connect(self.plgen, self) diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/ofdm.py b/gnuradio-core/src/python/gnuradio/blks2impl/ofdm.py new file mode 100644 index 0000000000..b040d8c7f4 --- /dev/null +++ b/gnuradio-core/src/python/gnuradio/blks2impl/ofdm.py @@ -0,0 +1,305 @@ + +# +# Copyright 2006,2007 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. +# + +import math +from numpy import fft +from gnuradio import gr, ofdm_packet_utils +import gnuradio.gr.gr_threading as _threading +import psk, qam + +from gnuradio.blksimpl.ofdm_receiver import ofdm_receiver + + +# ///////////////////////////////////////////////////////////////////////////// +# mod/demod with packets as i/o +# ///////////////////////////////////////////////////////////////////////////// + +class ofdm_mod(gr.hier_block): + """ + Modulates an OFDM stream. Based on the options fft_length, occupied_tones, and + cp_length, this block creates OFDM symbols using a specified modulation option. + + Send packets by calling send_pkt + """ + def __init__(self, fg, options, msgq_limit=2, pad_for_usrp=True): + """ + Hierarchical block for sending packets + + Packets to be sent are enqueued by calling send_pkt. + The output is the complex modulated signal at baseband. + + @param fg: flow graph + @type fg: flow graph + @param options: pass modulation options from higher layers (fft length, occupied tones, etc.) + @param msgq_limit: maximum number of messages in message queue + @type msgq_limit: int + @param pad_for_usrp: If true, packets are padded such that they end up a multiple of 128 samples + """ + + self._pad_for_usrp = pad_for_usrp + self._modulation = options.modulation + self._fft_length = options.fft_length + self._occupied_tones = options.occupied_tones + self._cp_length = options.cp_length + + win = [] #[1 for i in range(self._fft_length)] + + # Use freq domain to get doubled-up known symbol for correlation in time domain + zeros_on_left = int(math.ceil((self._fft_length - self._occupied_tones)/2.0)) + ksfreq = known_symbols_4512_3[0:self._occupied_tones] + for i in range(len(ksfreq)): + if((zeros_on_left + i) & 1): + ksfreq[i] = 0 + + # hard-coded known symbols + preambles = (ksfreq, + known_symbols_4512_1[0:self._occupied_tones], + known_symbols_4512_2[0:self._occupied_tones]) + + padded_preambles = list() + for pre in preambles: + padded = self._fft_length*[0,] + padded[zeros_on_left : zeros_on_left + self._occupied_tones] = pre + padded_preambles.append(padded) + + symbol_length = options.fft_length + options.cp_length + + mods = {"bpsk": 2, "qpsk": 4, "8psk": 8, "qam8": 8, "qam16": 16, "qam64": 64, "qam256": 256} + arity = mods[self._modulation] + + rot = 1 + if self._modulation == "qpsk": + rot = (0.707+0.707j) + + if(self._modulation.find("psk") >= 0): + rotated_const = map(lambda pt: pt * rot, psk.gray_constellation[arity]) + elif(self._modulation.find("qam") >= 0): + rotated_const = map(lambda pt: pt * rot, qam.constellation[arity]) + #print rotated_const + self._pkt_input = gr.ofdm_mapper_bcv(rotated_const, msgq_limit, + options.occupied_tones, options.fft_length) + + self.preambles = gr.ofdm_insert_preamble(self._fft_length, padded_preambles) + self.ifft = gr.fft_vcc(self._fft_length, False, win, True) + self.cp_adder = gr.ofdm_cyclic_prefixer(self._fft_length, symbol_length) + self.scale = gr.multiply_const_cc(1.0 / math.sqrt(self._fft_length)) + + fg.connect((self._pkt_input, 0), (self.preambles, 0)) + fg.connect((self._pkt_input, 1), (self.preambles, 1)) + fg.connect(self.preambles, self.ifft, self.cp_adder, self.scale) + + if options.verbose: + self._print_verbage() + + if options.log: + fg.connect(self._pkt_input, gr.file_sink(gr.sizeof_gr_complex*options.fft_length, + "ofdm_mapper_c.dat")) + + gr.hier_block.__init__(self, fg, None, self.scale) + + def send_pkt(self, payload='', eof=False): + """ + Send the payload. + + @param payload: data to send + @type payload: string + """ + if eof: + msg = gr.message(1) # tell self._pkt_input we're not sending any more packets + else: + # print "original_payload =", string_to_hex_list(payload) + pkt = ofdm_packet_utils.make_packet(payload, 1, 1, self._pad_for_usrp, whitening=True) + + #print "pkt =", string_to_hex_list(pkt) + msg = gr.message_from_string(pkt) + self._pkt_input.msgq().insert_tail(msg) + + def add_options(normal, expert): + """ + Adds OFDM-specific options to the Options Parser + """ + normal.add_option("-m", "--modulation", type="string", default="bpsk", + help="set modulation type (bpsk or qpsk) [default=%default]") + expert.add_option("", "--fft-length", type="intx", default=512, + help="set the number of FFT bins [default=%default]") + expert.add_option("", "--occupied-tones", type="intx", default=200, + help="set the number of occupied FFT bins [default=%default]") + expert.add_option("", "--cp-length", type="intx", default=128, + help="set the number of bits in the cyclic prefix [default=%default]") + # Make a static method to call before instantiation + add_options = staticmethod(add_options) + + def _print_verbage(self): + """ + Prints information about the OFDM modulator + """ + print "\nOFDM Modulator:" + print "Modulation Type: %s" % (self._modulation) + print "FFT length: %3d" % (self._fft_length) + print "Occupied Tones: %3d" % (self._occupied_tones) + print "CP length: %3d" % (self._cp_length) + + +class ofdm_demod(gr.hier_block): + """ + Demodulates a received OFDM stream. Based on the options fft_length, occupied_tones, and + cp_length, this block performs synchronization, FFT, and demodulation of incoming OFDM + symbols and passes packets up the a higher layer. + + The input is complex baseband. When packets are demodulated, they are passed to the + app via the callback. + """ + + def __init__(self, fg, options, callback=None): + """ + Hierarchical block for demodulating and deframing packets. + + The input is the complex modulated signal at baseband. + Demodulated packets are sent to the handler. + + @param fg: flow graph + @type fg: flow graph + @param options: pass modulation options from higher layers (fft length, occupied tones, etc.) + @param callback: function of two args: ok, payload + @type callback: ok: bool; payload: string + """ + self._rcvd_pktq = gr.msg_queue() # holds packets from the PHY + + self._modulation = options.modulation + self._fft_length = options.fft_length + self._occupied_tones = options.occupied_tones + self._cp_length = options.cp_length + self._snr = options.snr + + + # Use freq domain to get doubled-up known symbol for correlation in time domain + ksfreq = known_symbols_4512_3[0:self._occupied_tones] + for i in range(len(ksfreq)): + if(i&1): + ksfreq[i] = 0 + + zeros_on_left = int(math.ceil((self._fft_length - self._occupied_tones)/2.0)) + zeros_on_right = self._fft_length - self._occupied_tones - zeros_on_left + ks0 = zeros_on_left*[0.0,] + ks0.extend(ksfreq) + ks0.extend(zeros_on_right*[0.0,]) + + ks0time = fft.ifft(ks0) + # ADD SCALING FACTOR + ks0time = ks0time.tolist() + + # hard-coded known symbols + preambles = (ks0time, + known_symbols_4512_1[0:self._occupied_tones], + known_symbols_4512_2[0:self._occupied_tones]) + + symbol_length = self._fft_length + self._cp_length + self.ofdm_recv = ofdm_receiver(fg, self._fft_length, self._cp_length, + self._occupied_tones, self._snr, preambles, + options.log) + + mods = {"bpsk": 2, "qpsk": 4, "8psk": 8, "qam8": 8, "qam16": 16, "qam64": 64, "qam256": 256} + arity = mods[self._modulation] + + rot = 1 + if self._modulation == "qpsk": + rot = (0.707+0.707j) + + if(self._modulation.find("psk") >= 0): + rotated_const = map(lambda pt: pt * rot, psk.gray_constellation[arity]) + elif(self._modulation.find("qam") >= 0): + rotated_const = map(lambda pt: pt * rot, qam.constellation[arity]) + #print rotated_const + self.ofdm_demod = gr.ofdm_frame_sink(rotated_const, range(arity), + self._rcvd_pktq, + self._occupied_tones) + + fg.connect((self.ofdm_recv, 0), (self.ofdm_demod, 0)) + fg.connect((self.ofdm_recv, 1), (self.ofdm_demod, 1)) + + if options.verbose: + self._print_verbage() + + gr.hier_block.__init__(self, fg, self.ofdm_recv, None) + self._watcher = _queue_watcher_thread(self._rcvd_pktq, callback) + + + def add_options(normal, expert): + """ + Adds OFDM-specific options to the Options Parser + """ + normal.add_option("-m", "--modulation", type="string", default="bpsk", + help="set modulation type (bpsk or qpsk) [default=%default]") + expert.add_option("", "--fft-length", type="intx", default=512, + help="set the number of FFT bins [default=%default]") + expert.add_option("", "--occupied-tones", type="intx", default=200, + help="set the number of occupied FFT bins [default=%default]") + expert.add_option("", "--cp-length", type="intx", default=128, + help="set the number of bits in the cyclic prefix [default=%default]") + # Make a static method to call before instantiation + add_options = staticmethod(add_options) + + def _print_verbage(self): + """ + Prints information about the OFDM demodulator + """ + print "\nOFDM Demodulator:" + print "Modulation Type: %s" % (self._modulation) + print "FFT length: %3d" % (self._fft_length) + print "Occupied Tones: %3d" % (self._occupied_tones) + print "CP length: %3d" % (self._cp_length) + + + +class _queue_watcher_thread(_threading.Thread): + def __init__(self, rcvd_pktq, callback): + _threading.Thread.__init__(self) + self.setDaemon(1) + self.rcvd_pktq = rcvd_pktq + self.callback = callback + self.keep_running = True + self.start() + + + def run(self): + while self.keep_running: + msg = self.rcvd_pktq.delete_head() + ok, payload = ofdm_packet_utils.unmake_packet(msg.to_string()) + if self.callback: + self.callback(ok, payload) + +# Generating known symbols with: +# i = [2*random.randint(0,1)-1 for i in range(4512)] + +known_symbols_200_1 = [1.0, 1.0, -1.0, 1.0, -1.0, -1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, 1.0, -1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, -1.0, 1.0, -1.0, 1.0, -1.0, -1.0, -1.0, -1.0, 1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, -1.0, -1.0, -1.0, -1.0, 1.0, -1.0, -1.0, -1.0, -1.0, 1.0, -1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, 1.0, -1.0, 1.0, 1.0, -1.0, 1.0, -1.0, -1.0, -1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, -1.0, -1.0, 1.0, 1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, 1.0, -1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, -1.0, 1.0, -1.0, -1.0, -1.0, -1.0, -1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, 1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, 1.0, -1.0, 1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, 1.0, 1.0, -1.0, -1.0, -1.0, 1.0, -1.0, 1.0, 1.0, 1.0, -1.0, -1.0, -1.0, -1.0, -1.0, 1.0, -1.0, -1.0, -1.0, 1.0, -1.0, -1.0, -1.0, 1.0, 1.0, -1.0, 1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, 1.0, 1.0, -1.0, 1.0, 1.0, -1.0] + +known_symbols_200_2 = [-1.0, -1.0, -1.0, 1.0, 1.0, 1.0, -1.0, -1.0, -1.0, 1.0, 1.0, -1.0, -1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, -1.0, -1.0, 1.0, -1.0, 1.0, 1.0, 1.0, -1.0, -1.0, -1.0, -1.0, 1.0, -1.0, -1.0, 1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, 1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, 1.0, -1.0, -1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, -1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, 1.0, -1.0, -1.0, -1.0, 1.0, 1.0, 1.0, 1.0, -1.0, -1.0, -1.0, -1.0, -1.0, 1.0, -1.0, 1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, 1.0, -1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, -1.0, -1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, 1.0, -1.0, -1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, 1.0, -1.0, 1.0, -1.0, -1.0, -1.0, 1.0, 1.0, -1.0, -1.0, 1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, -1.0, -1.0, 1.0, -1.0, -1.0, -1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, -1.0, -1.0, -1.0, -1.0, 1.0, -1.0, -1.0, -1.0, 1.0, 1.0, 1.0] + + +known_symbols_4512_1 = [-1, 1, 1, 1, -1, -1, 1, -1, 1, -1, 1, 1, 1, 1, 1, -1, -1, 1, 1, -1, -1, 1, 1, -1, 1, -1, 1, -1, 1, 1, -1, -1, 1, 1, 1, 1, -1, 1, 1, -1, -1, 1, 1, -1, -1, 1, -1, 1, -1, -1, 1, -1, 1, 1, 1, 1, 1, 1, 1, -1, -1, -1, 1, -1, 1, 1, -1, 1, 1, 1, 1, 1, -1, -1, -1, 1, 1, -1, -1, 1, -1, -1, 1, 1, -1, 1, -1, -1, -1, -1, 1, 1, -1, 1, 1, 1, 1, 1, -1, 1, -1, -1, -1, 1, 1, -1, 1, -1, 1, 1, -1, 1, -1, 1, 1, -1, 1, 1, 1, -1, -1, -1, 1, -1, -1, -1, 1, 1, 1, -1, -1, -1, -1, 1, -1, 1, 1, -1, 1, -1, 1, -1, -1, -1, -1, -1, -1, -1, 1, 1, -1, 1, -1, -1, -1, 1, -1, 1, -1, 1, -1, 1, -1, -1, -1, -1, 1, -1, -1, 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b/gnuradio-core/src/python/gnuradio/blks2impl/ofdm_receiver.py new file mode 100644 index 0000000000..d16d2e2940 --- /dev/null +++ b/gnuradio-core/src/python/gnuradio/blks2impl/ofdm_receiver.py @@ -0,0 +1,64 @@ +#!/usr/bin/env python +# +# Copyright 2006, 2007 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. +# + +import math +from gnuradio import gr +from gnuradio.blksimpl.ofdm_sync_ml import ofdm_sync_ml +from gnuradio.blksimpl.ofdm_sync_pn import ofdm_sync_pn +from gnuradio.blksimpl.ofdm_sync_pnac import ofdm_sync_pnac + +class ofdm_receiver(gr.hier_block): + def __init__(self, fg, fft_length, cp_length, occupied_tones, snr, ks, logging=False): + self.fg = fg + + bw = (float(occupied_tones) / float(fft_length)) / 2.0 + tb = bw*0.08 + chan_coeffs = gr.firdes.low_pass (1.0, # gain + 1.0, # sampling rate + bw+tb, # midpoint of trans. band + tb, # width of trans. band + gr.firdes.WIN_HAMMING) # filter type + self.chan_filt = gr.fft_filter_ccc(1, chan_coeffs) + + win = [1 for i in range(fft_length)] + + SYNC = "pn" + if SYNC == "ml": + self.ofdm_sync = ofdm_sync_ml(fg, fft_length, cp_length, snr, logging) + elif SYNC == "pn": + self.ofdm_sync = ofdm_sync_pn(fg, fft_length, cp_length, logging) + elif SYNC == "pnac": + self.ofdm_sync = ofdm_sync_pnac(fg, fft_length, cp_length, ks[0]) + + self.fft_demod = gr.fft_vcc(fft_length, True, win, True) + self.ofdm_corr = gr.ofdm_correlator(occupied_tones, fft_length, + cp_length, ks[1], ks[2]) + + self.fg.connect(self.chan_filt, self.ofdm_sync, self.fft_demod, self.ofdm_corr) + + if logging: + self.fg.connect(self.chan_filt, gr.file_sink(gr.sizeof_gr_complex, "chan_filt_c.dat")) + self.fg.connect(self.fft_demod, gr.file_sink(gr.sizeof_gr_complex*fft_length, "fft_out_c.dat")) + self.fg.connect(self.ofdm_corr, gr.file_sink(gr.sizeof_gr_complex*occupied_tones, "ofdm_corr_out_c.dat")) + self.fg.connect((self.ofdm_corr,1), gr.file_sink(1, "found_corr_b.dat")) + + gr.hier_block.__init__(self, fg, self.chan_filt, self.ofdm_corr) diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/ofdm_sync_fixed.py b/gnuradio-core/src/python/gnuradio/blks2impl/ofdm_sync_fixed.py new file mode 100644 index 0000000000..b56f65660e --- /dev/null +++ b/gnuradio-core/src/python/gnuradio/blks2impl/ofdm_sync_fixed.py @@ -0,0 +1,41 @@ +#!/usr/bin/env python +# +# Copyright 2007 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. +# + +import math +from gnuradio import gr + +class ofdm_sync_fixed(gr.hier_block): + def __init__(self, fg, fft_length, cp_length, snr): + self.fg = fg + + # Use a fixed trigger point instead of sync block + data = (fft_length+cp_len)*[0,] + data[(fft_length+cp_len)-1] = 1 + peak_trigger = gr.vector_source_b(data, True) + + self.fg.connect(peak_trigger, (self.sampler,1)) + + if 1: + self.fg.connect(self.sampler, gr.file_sink(gr.sizeof_gr_complex*fft_length, + "ofdm_sync_fixed-sampler_c.dat")) + + gr.hier_block.__init__(self, fg, (self.sampler,0), self.sampler) diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/ofdm_sync_ml.py b/gnuradio-core/src/python/gnuradio/blks2impl/ofdm_sync_ml.py new file mode 100644 index 0000000000..d58f56cffc --- /dev/null +++ b/gnuradio-core/src/python/gnuradio/blks2impl/ofdm_sync_ml.py @@ -0,0 +1,135 @@ +#!/usr/bin/env python +# +# Copyright 2007 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. +# + +import math +from gnuradio import gr + +class ofdm_sync_ml(gr.hier_block): + def __init__(self, fg, fft_length, cp_length, snr, logging): + ''' Maximum Likelihood OFDM synchronizer: + J. van de Beek, M. Sandell, and P. O. Borjesson, "ML Estimation + of Time and Frequency Offset in OFDM Systems," IEEE Trans. + Signal Processing, vol. 45, no. 7, pp. 1800-1805, 1997. + ''' + + self.fg = fg + + # FIXME: when converting to hier_block2's, the output signature + # should be the output of the divider (the normalized peaks) and + # the angle value out of the sample and hold block + + self.input = gr.add_const_cc(0) + + SNR = 10.0**(snr/10.0) + rho = SNR / (SNR + 1.0) + symbol_length = fft_length + cp_length + + # ML Sync + + # Energy Detection from ML Sync + + # Create a delay line + self.delay = gr.delay(gr.sizeof_gr_complex, fft_length) + self.fg.connect(self.input, self.delay) + + # magnitude squared blocks + self.magsqrd1 = gr.complex_to_mag_squared() + self.magsqrd2 = gr.complex_to_mag_squared() + self.adder = gr.add_ff() + + moving_sum_taps = [rho/2 for i in range(cp_length)] + self.moving_sum_filter = gr.fir_filter_fff(1,moving_sum_taps) + + self.fg.connect(self.input,self.magsqrd1) + self.fg.connect(self.delay,self.magsqrd2) + self.fg.connect(self.magsqrd1,(self.adder,0)) + self.fg.connect(self.magsqrd2,(self.adder,1)) + self.fg.connect(self.adder,self.moving_sum_filter) + + + # Correlation from ML Sync + self.conjg = gr.conjugate_cc(); + self.mixer = gr.multiply_cc(); + + movingsum2_taps = [1.0 for i in range(cp_length)] + self.movingsum2 = gr.fir_filter_ccf(1,movingsum2_taps) + + # Correlator data handler + self.c2mag = gr.complex_to_mag() + self.angle = gr.complex_to_arg() + self.fg.connect(self.input,(self.mixer,1)) + self.fg.connect(self.delay,self.conjg,(self.mixer,0)) + self.fg.connect(self.mixer,self.movingsum2,self.c2mag) + self.fg.connect(self.movingsum2,self.angle) + + # ML Sync output arg, need to find maximum point of this + self.diff = gr.sub_ff() + self.fg.connect(self.c2mag,(self.diff,0)) + self.fg.connect(self.moving_sum_filter,(self.diff,1)) + + #ML measurements input to sampler block and detect + nco_sensitivity = -1.0/fft_length + self.f2c = gr.float_to_complex() + self.sampler = gr.ofdm_sampler(fft_length,symbol_length) + self.pk_detect = gr.peak_detector_fb(0.2, 0.25, 30, 0.0005) + self.sample_and_hold = gr.sample_and_hold_ff() + self.nco = gr.frequency_modulator_fc(nco_sensitivity) + self.sigmix = gr.multiply_cc() + + # Mix the signal with an NCO controlled by the sync loop + self.fg.connect(self.input, (self.sigmix,0)) + self.fg.connect(self.nco, (self.sigmix,1)) + self.fg.connect(self.sigmix, (self.sampler,0)) + + # use the sync loop values to set the sampler and the NCO + # self.diff = theta + # self.angle = epsilon + + self.fg.connect(self.diff, self.pk_detect) + + use_dpll = 1 + if use_dpll: + self.dpll = gr.dpll_bb(float(symbol_length),0.01) + self.fg.connect(self.pk_detect, self.dpll) + self.fg.connect(self.dpll, (self.sampler,1)) + self.fg.connect(self.dpll, (self.sample_and_hold,1)) + else: + self.fg.connect(self.pk_detect, (self.sampler,1)) + self.fg.connect(self.pk_detect, (self.sample_and_hold,1)) + + self.fg.connect(self.angle, (self.sample_and_hold,0)) + self.fg.connect(self.sample_and_hold, self.nco) + + if logging: + self.fg.connect(self.diff, gr.file_sink(gr.sizeof_float, "ofdm_sync_ml-theta_f.dat")) + self.fg.connect(self.angle, gr.file_sink(gr.sizeof_float, "ofdm_sync_ml-epsilon_f.dat")) + self.fg.connect(self.pk_detect, gr.file_sink(gr.sizeof_char, "ofdm_sync_ml-peaks_b.dat")) + if use_dpll: + self.fg.connect(self.dpll, gr.file_sink(gr.sizeof_char, "ofdm_sync_ml-dpll_b.dat")) + + self.fg.connect(self.sigmix, gr.file_sink(gr.sizeof_gr_complex, "ofdm_sync_ml-sigmix_c.dat")) + self.fg.connect(self.sampler, gr.file_sink(gr.sizeof_gr_complex*fft_length, "ofdm_sync_ml-sampler_c.dat")) + self.fg.connect(self.sample_and_hold, gr.file_sink(gr.sizeof_float, "ofdm_sync_ml-sample_and_hold_f.dat")) + self.fg.connect(self.nco, gr.file_sink(gr.sizeof_gr_complex, "ofdm_sync_ml-nco_c.dat")) + self.fg.connect(self.input, gr.file_sink(gr.sizeof_gr_complex, "ofdm_sync_ml-input_c.dat")) + + gr.hier_block.__init__(self, fg, self.input, self.sampler) diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/ofdm_sync_pn.py b/gnuradio-core/src/python/gnuradio/blks2impl/ofdm_sync_pn.py new file mode 100644 index 0000000000..56425868f9 --- /dev/null +++ b/gnuradio-core/src/python/gnuradio/blks2impl/ofdm_sync_pn.py @@ -0,0 +1,135 @@ +#!/usr/bin/env python +# +# Copyright 2007 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. +# + +import math +from numpy import fft +from gnuradio import gr + +class ofdm_sync_pn(gr.hier_block): + def __init__(self, fg, fft_length, cp_length, logging=False): + ''' OFDM synchronization using PN Correlation: + T. M. Schmidl and D. C. Cox, "Robust Frequency and Timing + Synchonization for OFDM," IEEE Trans. Communications, vol. 45, + no. 12, 1997. + ''' + + self.fg = fg + + # FIXME: when converting to hier_block2's, the output signature + # should be the output of the divider (the normalized peaks) and + # the angle value out of the sample and hold block + + self.input = gr.add_const_cc(0) + + symbol_length = fft_length + cp_length + + # PN Sync + + # Create a delay line + self.delay = gr.delay(gr.sizeof_gr_complex, fft_length/2) + + # Correlation from ML Sync + self.conjg = gr.conjugate_cc(); + self.corr = gr.multiply_cc(); + + # Create a moving sum filter for the corr output + if 1: + moving_sum_taps = [1.0 for i in range(fft_length//2)] + self.moving_sum_filter = gr.fir_filter_ccf(1,moving_sum_taps) + else: + moving_sum_taps = [complex(1.0,0.0) for i in range(fft_length//2)] + self.moving_sum_filter = gr.fft_filter_ccc(1,moving_sum_taps) + + # Create a moving sum filter for the input + self.inputmag2 = gr.complex_to_mag_squared() + movingsum2_taps = [1.0 for i in range(fft_length//2)] + + if 1: + self.inputmovingsum = gr.fir_filter_fff(1,movingsum2_taps) + else: + self.inputmovingsum = gr.fft_filter_fff(1,movingsum2_taps) + + self.square = gr.multiply_ff() + self.normalize = gr.divide_ff() + + # Get magnitude (peaks) and angle (phase/freq error) + self.c2mag = gr.complex_to_mag_squared() + self.angle = gr.complex_to_arg() + + self.sample_and_hold = gr.sample_and_hold_ff() + + # Mix the signal with an NCO controlled by the sync loop + nco_sensitivity = -2.0/fft_length + self.nco = gr.frequency_modulator_fc(nco_sensitivity) + self.sigmix = gr.multiply_cc() + + #ML measurements input to sampler block and detect + self.sub1 = gr.add_const_ff(-1) + self.pk_detect = gr.peak_detector_fb(0.2, 0.25, 30, 0.0005) + self.regen = gr.regenerate_bb(symbol_length) + + self.sampler = gr.ofdm_sampler(fft_length,symbol_length) + + self.fg.connect(self.input, self.delay) + self.fg.connect(self.input, (self.corr,0)) + self.fg.connect(self.delay, self.conjg) + self.fg.connect(self.conjg, (self.corr,1)) + self.fg.connect(self.corr, self.moving_sum_filter) + self.fg.connect(self.moving_sum_filter, self.c2mag) + self.fg.connect(self.moving_sum_filter, self.angle) + self.fg.connect(self.angle, (self.sample_and_hold,0)) + self.fg.connect(self.sample_and_hold, self.nco) + + self.fg.connect(self.input, (self.sigmix,0)) + self.fg.connect(self.nco, (self.sigmix,1)) + self.fg.connect(self.sigmix, (self.sampler,0)) + + self.fg.connect(self.input, self.inputmag2, self.inputmovingsum) + self.fg.connect(self.inputmovingsum, (self.square,0)) + self.fg.connect(self.inputmovingsum, (self.square,1)) + self.fg.connect(self.square, (self.normalize,1)) + self.fg.connect(self.c2mag, (self.normalize,0)) + + # Create a moving sum filter for the corr output + matched_filter_taps = [1.0/cp_length for i in range(cp_length)] + self.matched_filter = gr.fir_filter_fff(1,matched_filter_taps) + self.fg.connect(self.normalize, self.matched_filter) + + self.fg.connect(self.matched_filter, self.sub1, self.pk_detect) + self.fg.connect(self.pk_detect, self.regen) + self.fg.connect(self.regen, (self.sampler,1)) + self.fg.connect(self.pk_detect, (self.sample_and_hold,1)) + + + if logging: + self.fg.connect(self.matched_filter, gr.file_sink(gr.sizeof_float, "ofdm_sync_pn-mf_f.dat")) + self.fg.connect(self.normalize, gr.file_sink(gr.sizeof_float, "ofdm_sync_pn-theta_f.dat")) + self.fg.connect(self.angle, gr.file_sink(gr.sizeof_float, "ofdm_sync_pn-epsilon_f.dat")) + self.fg.connect(self.pk_detect, gr.file_sink(gr.sizeof_char, "ofdm_sync_pn-peaks_b.dat")) + self.fg.connect(self.regen, gr.file_sink(gr.sizeof_char, "ofdm_sync_pn-regen_b.dat")) + self.fg.connect(self.sigmix, gr.file_sink(gr.sizeof_gr_complex, "ofdm_sync_pn-sigmix_c.dat")) + self.fg.connect(self.sampler, gr.file_sink(gr.sizeof_gr_complex*fft_length, "ofdm_sync_pn-sampler_c.dat")) + self.fg.connect(self.sample_and_hold, gr.file_sink(gr.sizeof_float, "ofdm_sync_pn-sample_and_hold_f.dat")) + self.fg.connect(self.nco, gr.file_sink(gr.sizeof_gr_complex, "ofdm_sync_pn-nco_c.dat")) + self.fg.connect(self.input, gr.file_sink(gr.sizeof_gr_complex, "ofdm_sync_pn-input_c.dat")) + + gr.hier_block.__init__(self, fg, self.input, self.sampler) diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/ofdm_sync_pnac.py b/gnuradio-core/src/python/gnuradio/blks2impl/ofdm_sync_pnac.py new file mode 100644 index 0000000000..e3774e3410 --- /dev/null +++ b/gnuradio-core/src/python/gnuradio/blks2impl/ofdm_sync_pnac.py @@ -0,0 +1,126 @@ +#!/usr/bin/env python +# +# Copyright 2007 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. +# + +import math +from numpy import fft +from gnuradio import gr + +class ofdm_sync_pnac(gr.hier_block): + def __init__(self, fg, fft_length, cp_length, ks): + self.fg = fg + + # FIXME: when converting to hier_block2's, the output signature + # should be the output of the divider (the normalized peaks) and + # the angle value out of the sample and hold block + + self.input = gr.add_const_cc(0) + + symbol_length = fft_length + cp_length + + # PN Sync + + # autocorrelate with the known symbol + ks = ks[0:fft_length//2] + ks.reverse() + self.crosscorr_filter = gr.fir_filter_ccc(1, ks) + self.fg.connect(self.crosscorr_filter, gr.file_sink(gr.sizeof_gr_complex, "crosscorr.dat")) + + # Create a delay line + self.delay = gr.delay(gr.sizeof_gr_complex, fft_length/2) + + # Correlation from ML Sync + self.conjg = gr.conjugate_cc(); + self.corr = gr.multiply_cc(); + + # Create a moving sum filter for the corr output + moving_sum_taps = [1.0 for i in range(fft_length//2)] + self.moving_sum_filter = gr.fir_filter_ccf(1,moving_sum_taps) + + # Create a moving sum filter for the input + self.inputmag2 = gr.complex_to_mag_squared() + movingsum2_taps = [1.0 for i in range(fft_length/2)] + self.inputmovingsum = gr.fir_filter_fff(1,movingsum2_taps) + self.square = gr.multiply_ff() + self.normalize = gr.divide_ff() + + # Get magnitude (peaks) and angle (phase/freq error) + self.c2mag = gr.complex_to_mag_squared() + self.angle = gr.complex_to_arg() + + self.sample_and_hold = gr.sample_and_hold_ff() + + # Mix the signal with an NCO controlled by the sync loop + nco_sensitivity = -1.0/fft_length + self.nco = gr.frequency_modulator_fc(nco_sensitivity) + self.sigmix = gr.multiply_cc() + + #ML measurements input to sampler block and detect + self.sub1 = gr.add_const_ff(-1) + self.pk_detect = gr.peak_detector_fb(0.2, 0.25, 30, 0.0005) + + self.sampler = gr.ofdm_sampler(fft_length,symbol_length) + + self.fg.connect(self.input, self.crosscorr_filter) + self.fg.connect(self.crosscorr_filter, self.delay) + self.fg.connect(self.crosscorr_filter, (self.corr,0)) + self.fg.connect(self.delay, self.conjg) + self.fg.connect(self.conjg, (self.corr,1)) + self.fg.connect(self.corr, self.moving_sum_filter) + self.fg.connect(self.moving_sum_filter, self.c2mag) + self.fg.connect(self.moving_sum_filter, self.angle) + self.fg.connect(self.angle, (self.sample_and_hold,0)) + self.fg.connect(self.sample_and_hold, self.nco) + + self.fg.connect(self.input, (self.sigmix,0)) + self.fg.connect(self.nco, (self.sigmix,1)) + self.fg.connect(self.sigmix, (self.sampler,0)) + + self.fg.connect(self.input, self.inputmag2, self.inputmovingsum) + self.fg.connect(self.inputmovingsum, (self.square,0)) + self.fg.connect(self.inputmovingsum, (self.square,1)) + self.fg.connect(self.square, (self.normalize,1)) + self.fg.connect(self.c2mag, (self.normalize,0)) + self.fg.connect(self.normalize, self.sub1, self.pk_detect) + + self.fg.connect(self.pk_detect, (self.sampler,1)) + self.fg.connect(self.pk_detect, (self.sample_and_hold,1)) + + + if 1: + self.fg.connect(self.normalize, gr.file_sink(gr.sizeof_float, + "ofdm_sync_pnac-theta_f.dat")) + self.fg.connect(self.angle, gr.file_sink(gr.sizeof_float, + "ofdm_sync_pnac-epsilon_f.dat")) + self.fg.connect(self.pk_detect, gr.file_sink(gr.sizeof_char, + "ofdm_sync_pnac-peaks_b.dat")) + self.fg.connect(self.sigmix, gr.file_sink(gr.sizeof_gr_complex, + "ofdm_sync_pnac-sigmix_c.dat")) + self.fg.connect(self.sampler, gr.file_sink(gr.sizeof_gr_complex*fft_length, + "ofdm_sync_pnac-sampler_c.dat")) + self.fg.connect(self.sample_and_hold, gr.file_sink(gr.sizeof_float, + "ofdm_sync_pnac-sample_and_hold_f.dat")) + self.fg.connect(self.nco, gr.file_sink(gr.sizeof_gr_complex, + "ofdm_sync_pnac-nco_c.dat")) + self.fg.connect(self.input, gr.file_sink(gr.sizeof_gr_complex, + "ofdm_sync_pnac-input_c.dat")) + + gr.hier_block.__init__(self, fg, self.input, self.sampler) diff --git a/gnuradio-core/src/python/gnuradio/blksimpl2/pkt.py b/gnuradio-core/src/python/gnuradio/blks2impl/pkt.py index 70eab5bfb9..908437ef2b 100644 --- a/gnuradio-core/src/python/gnuradio/blksimpl2/pkt.py +++ b/gnuradio-core/src/python/gnuradio/blks2impl/pkt.py @@ -1,5 +1,5 @@ # -# Copyright 2005,2006,2007 Free Software Foundation, Inc. +# Copyright 2005, 2006, 2007 Free Software Foundation, Inc. # # This file is part of GNU Radio # @@ -34,29 +34,34 @@ class mod_pkts(gr.hier_block2): Send packets by calling send_pkt """ - def __init__(self, modulator, access_code=None, msgq_limit=2, pad_for_usrp=True): + def __init__(self, modulator, access_code=None, msgq_limit=2, pad_for_usrp=True, use_whitener_offset=False): """ Hierarchical block for sending packets Packets to be sent are enqueued by calling send_pkt. The output is the complex modulated signal at baseband. - @param modulator: instance of modulator class (gr_block or hier_block) + @param modulator: instance of modulator class (gr_block or hier_block2) @type modulator: complex baseband out @param access_code: AKA sync vector @type access_code: string of 1's and 0's between 1 and 64 long @param msgq_limit: maximum number of messages in message queue @type msgq_limit: int @param pad_for_usrp: If true, packets are padded such that they end up a multiple of 128 samples + @param use_whitener_offset: If true, start of whitener XOR string is incremented each packet + + See gmsk_mod for remaining parameters """ - gr.hier_block2.__init__(self, "mod_pkts", - gr.io_signature(0,0,0), # Input signature - gr.io_signature(1,1,gr.sizeof_gr_complex)) # Output signature + gr.hier_block2.__init__(self, "mod_pkts", + gr.io_signature(0, 0, 0), # Input signature + gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature self._modulator = modulator self._pad_for_usrp = pad_for_usrp - + self._use_whitener_offset = use_whitener_offset + self._whitener_offset = 0 + if access_code is None: access_code = packet_utils.default_access_code if not packet_utils.is_1_0_string(access_code): @@ -65,7 +70,7 @@ class mod_pkts(gr.hier_block2): # accepts messages from the outside world self._pkt_input = gr.message_source(gr.sizeof_char, msgq_limit) - self.connect(self._pkt_input, self._modulator, self) + self.connect(self._pkt_input, self._modulator, self) def send_pkt(self, payload='', eof=False): """ @@ -82,9 +87,13 @@ class mod_pkts(gr.hier_block2): self._modulator.samples_per_symbol(), self._modulator.bits_per_symbol(), self._access_code, - self._pad_for_usrp) + self._pad_for_usrp, + self._whitener_offset) #print "pkt =", string_to_hex_list(pkt) msg = gr.message_from_string(pkt) + if self._use_whitener_offset is True: + self._whitener_offset = (self._whitener_offset + 1) % 16 + self._pkt_input.msgq().insert_tail(msg) @@ -104,7 +113,7 @@ class demod_pkts(gr.hier_block2): The input is the complex modulated signal at baseband. Demodulated packets are sent to the handler. - @param demodulator: instance of demodulator class (gr_block or hier_block) + @param demodulator: instance of demodulator class (gr_block or hier_block2) @type demodulator: complex baseband in @param access_code: AKA sync vector @type access_code: string of 1's and 0's @@ -114,10 +123,10 @@ class demod_pkts(gr.hier_block2): @type threshold: int """ - gr.hier_block2.__init__(self, "demod_pkts", - gr.io_signature(1,1,gr.sizeof_gr_complex), # Input signature - gr.io_signature(0,0,0)) # Output signature - + gr.hier_block2.__init__(self, "demod_pkts", + gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature + gr.io_signature(0, 0, 0)) # Output signature + self._demodulator = demodulator if access_code is None: access_code = packet_utils.default_access_code @@ -129,11 +138,11 @@ class demod_pkts(gr.hier_block2): threshold = 12 # FIXME raise exception self._rcvd_pktq = gr.msg_queue() # holds packets from the PHY + self.correlator = gr.correlate_access_code_bb(access_code, threshold) - self._correlator = gr.correlate_access_code_bb(access_code, threshold) - self._framer_sink = gr.framer_sink_1(self._rcvd_pktq) - self.connect(self, self._demodulator, self._correlator, self._framer_sink) - + self.framer_sink = gr.framer_sink_1(self._rcvd_pktq) + self.connect(self, self._demodulator, self.correlator, self.framer_sink) + self._watcher = _queue_watcher_thread(self._rcvd_pktq, callback) @@ -150,6 +159,6 @@ class _queue_watcher_thread(_threading.Thread): def run(self): while self.keep_running: msg = self.rcvd_pktq.delete_head() - ok, payload = packet_utils.unmake_packet(msg.to_string()) + ok, payload = packet_utils.unmake_packet(msg.to_string(), int(msg.arg1())) if self.callback: self.callback(ok, payload) diff --git a/gnuradio-core/src/python/gnuradio/blksimpl2/psk.py b/gnuradio-core/src/python/gnuradio/blks2impl/psk.py index 69899ebe3e..acedf3b69a 100644 --- a/gnuradio-core/src/python/gnuradio/blksimpl2/psk.py +++ b/gnuradio-core/src/python/gnuradio/blks2impl/psk.py @@ -38,14 +38,14 @@ def make_gray_constellation(m): re = math.cos(theta) im = math.sin(theta) const_map.append(complex(re, im)) # plug it into the constellation - + # return the constellation; by default, it is normalized return const_map # This makes a constellation that increments around the unit circle def make_constellation(m): return [cmath.exp(i * 2 * pi / m * 1j) for i in range(m)] - + # Common definition of constellations for Tx and Rx constellation = { 2 : make_constellation(2), # BPSK @@ -53,6 +53,12 @@ constellation = { 8 : make_constellation(8) # 8PSK } +gray_constellation = { + 2 : make_gray_constellation(2), # BPSK + 4 : make_gray_constellation(4), # QPSK + 8 : make_gray_constellation(8) # 8PSK + } + # ----------------------- # Do Gray code # ----------------------- @@ -62,7 +68,7 @@ binary_to_gray = { 4 : [0,1,3,2], 8 : [0, 1, 3, 2, 7, 6, 4, 5] } - + # gray to binary gray_to_binary = { 2 : range(2), @@ -79,7 +85,7 @@ binary_to_ungray = { 4 : range(4), 8 : range(8) } - + # identity mapping ungray_to_binary = { 2 : range(2), diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/qam.py b/gnuradio-core/src/python/gnuradio/blks2impl/qam.py new file mode 100644 index 0000000000..22b1e1dabb --- /dev/null +++ b/gnuradio-core/src/python/gnuradio/blks2impl/qam.py @@ -0,0 +1,113 @@ +# +# Copyright 2005,2006 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. +# + +from math import pi, sqrt +import math + +# These constellations are generated for Gray coding when symbos [1, ..., m] are used +# Mapping to Gray coding is therefore unnecessary + +def make_constellation(m): + # number of bits/symbol (log2(M)) + k = int(math.log10(m) / math.log10(2.0)) + + coeff = 1 + const_map = [] + for i in range(m): + a = (i&(0x01 << k-1)) >> k-1 + b = (i&(0x01 << k-2)) >> k-2 + bits_i = [((i&(0x01 << k-j-1)) >> k-j-1) for j in range(2, k, 2)] + bits_q = [((i&(0x01 << k-j-1)) >> k-j-1) for j in range(3, k, 2)] + + ss = 0 + ll = len(bits_i) + for ii in range(ll): + rr = 0 + for jj in range(ll-ii): + rr = abs(bits_i[jj] - rr) + ss += rr*pow(2.0, ii+1) + re = (2*a-1)*(ss+1) + + ss = 0 + ll = len(bits_q) + for ii in range(ll): + rr = 0 + for jj in range(ll-ii): + rr = abs(bits_q[jj] - rr) + ss += rr*pow(2.0, ii+1) + im = (2*b-1)*(ss+1) + + a = max(re, im) + if a > coeff: + coeff = a + const_map.append(complex(re, im)) + + norm_map = [complex(i.real/coeff, i.imag/coeff) for i in const_map] + return norm_map + +# Common definition of constellations for Tx and Rx +constellation = { + 4 : make_constellation(4), # QAM4 (QPSK) + 8 : make_constellation(8), # QAM8 + 16: make_constellation(16), # QAM16 + 64: make_constellation(64), # QAM64 + 256: make_constellation(256) # QAM256 + } + +# ----------------------- +# Do Gray code +# ----------------------- +# binary to gray coding +binary_to_gray = { + 4 : range(4), + 8 : range(8), + 16: range(16), + 64: range(64), + 256: range(256) + } + +# gray to binary +gray_to_binary = { + 4 : range(4), + 8 : range(8), + 16: range(16), + 64: range(64), + 256: range(256) + } + +# ----------------------- +# Don't Gray code +# ----------------------- +# identity mapping +binary_to_ungray = { + 4 : range(4), + 8 : range(8), + 16: range(16), + 64: range(64) + } + +# identity mapping +ungray_to_binary = { + 4 : range(4), + 8 : range(8), + 16: range(16), + 64: range(64) + } diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/qam16.py b/gnuradio-core/src/python/gnuradio/blks2impl/qam16.py new file mode 100644 index 0000000000..0bdb9c6fb8 --- /dev/null +++ b/gnuradio-core/src/python/gnuradio/blks2impl/qam16.py @@ -0,0 +1,208 @@ +# +# Copyright 2005,2006,2007 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. +# + +# See gnuradio-examples/python/digital for examples + +""" +QAM16 modulation and demodulation. +""" + +from gnuradio import gr, gru, modulation_utils +from math import pi, sqrt +import qam +import cmath +from pprint import pprint + +# default values (used in __init__ and add_options) +_def_samples_per_symbol = 2 +_def_excess_bw = 0.35 +_def_gray_code = True +_def_verbose = False +_def_log = False + +_def_costas_alpha = None +_def_gain_mu = 0.03 +_def_mu = 0.05 +_def_omega_relative_limit = 0.005 + + +# ///////////////////////////////////////////////////////////////////////////// +# QAM16 modulator +# ///////////////////////////////////////////////////////////////////////////// + +class qam16_mod(gr.hier_block2): + + def __init__(self, + samples_per_symbol=_def_samples_per_symbol, + excess_bw=_def_excess_bw, + gray_code=_def_gray_code, + verbose=_def_verbose, + log=_def_log): + + """ + Hierarchical block for RRC-filtered QPSK modulation. + + The input is a byte stream (unsigned char) and the + output is the complex modulated signal at baseband. + + @param samples_per_symbol: samples per symbol >= 2 + @type samples_per_symbol: integer + @param excess_bw: Root-raised cosine filter excess bandwidth + @type excess_bw: float + @param gray_code: Tell modulator to Gray code the bits + @type gray_code: bool + @param verbose: Print information about modulator? + @type verbose: bool + @param debug: Print modualtion data to files? + @type debug: bool + """ + + gr.hier_block2.__init__(self, "qam16_mod", + gr.io_signature(1, 1, gr.sizeof_char), # Input signature + gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature + + self._samples_per_symbol = samples_per_symbol + self._excess_bw = excess_bw + self._gray_code = gray_code + + if not isinstance(samples_per_symbol, int) or samples_per_symbol < 2: + raise TypeError, ("sbp must be an integer >= 2, is %d" % samples_per_symbol) + + ntaps = 11 * samples_per_symbol + + arity = pow(2, self.bits_per_symbol()) + + # turn bytes into k-bit vectors + self.bytes2chunks = \ + gr.packed_to_unpacked_bb(self.bits_per_symbol(), gr.GR_MSB_FIRST) + + if self._gray_code: + self.symbol_mapper = gr.map_bb(qam.binary_to_gray[arity]) + else: + self.symbol_mapper = gr.map_bb(qam.binary_to_ungray[arity]) + + self.diffenc = gr.diff_encoder_bb(arity) + + rot = 1.0 + print "constellation with %d arity" % arity + rotated_const = map(lambda pt: pt * rot, qam.constellation[arity]) + self.chunks2symbols = gr.chunks_to_symbols_bc(rotated_const) + + # pulse shaping filter + self.rrc_taps = gr.firdes.root_raised_cosine( + self._samples_per_symbol, # gain (sps since we're interpolating by sps) + self._samples_per_symbol, # sampling rate + 1.0, # symbol rate + self._excess_bw, # excess bandwidth (roll-off factor) + ntaps) + + self.rrc_filter = gr.interp_fir_filter_ccf(self._samples_per_symbol, self.rrc_taps) + + if verbose: + self._print_verbage() + + if log: + self._setup_logging() + + # Connect + self.connect(self, self.bytes2chunks, self.symbol_mapper, self.diffenc, + self.chunks2symbols, self.rrc_filter, self) + + def samples_per_symbol(self): + return self._samples_per_symbol + + def bits_per_symbol(self=None): # staticmethod that's also callable on an instance + return 4 + bits_per_symbol = staticmethod(bits_per_symbol) # make it a static method. RTFM + + def _print_verbage(self): + print "bits per symbol = %d" % self.bits_per_symbol() + print "Gray code = %s" % self._gray_code + print "RRS roll-off factor = %f" % self._excess_bw + + def _setup_logging(self): + print "Modulation logging turned on." + self.connect(self.bytes2chunks, + gr.file_sink(gr.sizeof_char, "bytes2chunks.dat")) + self.connect(self.symbol_mapper, + gr.file_sink(gr.sizeof_char, "graycoder.dat")) + self.connect(self.diffenc, + gr.file_sink(gr.sizeof_char, "diffenc.dat")) + self.connect(self.chunks2symbols, + gr.file_sink(gr.sizeof_gr_complex, "chunks2symbols.dat")) + self.connect(self.rrc_filter, + gr.file_sink(gr.sizeof_gr_complex, "rrc_filter.dat")) + + def add_options(parser): + """ + Adds QAM modulation-specific options to the standard parser + """ + parser.add_option("", "--excess-bw", type="float", default=_def_excess_bw, + help="set RRC excess bandwith factor [default=%default] (PSK)") + parser.add_option("", "--no-gray-code", dest="gray_code", + action="store_false", default=_def_gray_code, + help="disable gray coding on modulated bits (PSK)") + add_options=staticmethod(add_options) + + + def extract_kwargs_from_options(options): + """ + Given command line options, create dictionary suitable for passing to __init__ + """ + return modulation_utils.extract_kwargs_from_options(qam16_mod.__init__, + ('self',), options) + extract_kwargs_from_options=staticmethod(extract_kwargs_from_options) + + +# ///////////////////////////////////////////////////////////////////////////// +# QAM16 demodulator +# +# ///////////////////////////////////////////////////////////////////////////// + +class qam16_demod(gr.hier_block2): + + def __init__(self, + samples_per_symbol=_def_samples_per_symbol, + excess_bw=_def_excess_bw, + costas_alpha=_def_costas_alpha, + gain_mu=_def_gain_mu, + mu=_def_mu, + omega_relative_limit=_def_omega_relative_limit, + gray_code=_def_gray_code, + verbose=_def_verbose, + log=_def_log): + + gr.hier_block2.__init__(self, "qam16_demod", + gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature + gr.io_signature(1, 1, gr.sizeof_char)) # Output signature + # do this + pass + + def bits_per_symbol(self=None): # staticmethod that's also callable on an instance + return 4 + bits_per_symbol = staticmethod(bits_per_symbol) # make it a static method. RTFM + +# +# Add these to the mod/demod registry +# +# NOT READY TO BE USED YET -- ENABLE AT YOUR OWN RISK +#modulation_utils.add_type_1_mod('qam16', qam16_mod) +#modulation_utils.add_type_1_demod('qam16', qam16_demod) diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/qam256.py b/gnuradio-core/src/python/gnuradio/blks2impl/qam256.py new file mode 100644 index 0000000000..fc455f17c1 --- /dev/null +++ b/gnuradio-core/src/python/gnuradio/blks2impl/qam256.py @@ -0,0 +1,209 @@ +# +# Copyright 2005,2006,2007 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. +# + +# See gnuradio-examples/python/digital for examples + +""" +QAM256 modulation and demodulation. +""" + +from gnuradio import gr, gru, modulation_utils +from math import pi, sqrt +import qam +import cmath +from pprint import pprint + +# default values (used in __init__ and add_options) +_def_samples_per_symbol = 2 +_def_excess_bw = 0.35 +_def_gray_code = True +_def_verbose = False +_def_log = False + +_def_costas_alpha = None +_def_gain_mu = 0.03 +_def_mu = 0.05 +_def_omega_relative_limit = 0.005 + + +# ///////////////////////////////////////////////////////////////////////////// +# QAM256 modulator +# ///////////////////////////////////////////////////////////////////////////// + +class qam256_mod(gr.hier_block2): + + def __init__(self, + samples_per_symbol=_def_samples_per_symbol, + excess_bw=_def_excess_bw, + gray_code=_def_gray_code, + verbose=_def_verbose, + log=_def_log): + + """ + Hierarchical block for RRC-filtered QPSK modulation. + + The input is a byte stream (unsigned char) and the + output is the complex modulated signal at baseband. + + @param samples_per_symbol: samples per symbol >= 2 + @type samples_per_symbol: integer + @param excess_bw: Root-raised cosine filter excess bandwidth + @type excess_bw: float + @param gray_code: Tell modulator to Gray code the bits + @type gray_code: bool + @param verbose: Print information about modulator? + @type verbose: bool + @param debug: Print modualtion data to files? + @type debug: bool + """ + + gr.hier_block2.__init__(self, "qam256_mod", + gr.io_signature(1, 1, gr.sizeof_char), # Input signature + gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature + + self._samples_per_symbol = samples_per_symbol + self._excess_bw = excess_bw + self._gray_code = gray_code + + if not isinstance(samples_per_symbol, int) or samples_per_symbol < 2: + raise TypeError, ("sbp must be an integer >= 2, is %d" % samples_per_symbol) + + ntaps = 11 * samples_per_symbol + + arity = pow(2, self.bits_per_symbol()) + + # turn bytes into k-bit vectors + self.bytes2chunks = \ + gr.packed_to_unpacked_bb(self.bits_per_symbol(), gr.GR_MSB_FIRST) + + if self._gray_code: + self.symbol_mapper = gr.map_bb(qam.binary_to_gray[arity]) + else: + self.symbol_mapper = gr.map_bb(qam.binary_to_ungray[arity]) + + self.diffenc = gr.diff_encoder_bb(arity) + + rot = 1.0 + print "constellation with %d arity" % arity + rotated_const = map(lambda pt: pt * rot, qam.constellation[arity]) + self.chunks2symbols = gr.chunks_to_symbols_bc(rotated_const) + + # pulse shaping filter + self.rrc_taps = gr.firdes.root_raised_cosine( + self._samples_per_symbol, # gain (sps since we're interpolating by sps) + self._samples_per_symbol, # sampling rate + 1.0, # symbol rate + self._excess_bw, # excess bandwidth (roll-off factor) + ntaps) + + self.rrc_filter = gr.interp_fir_filter_ccf(self._samples_per_symbol, self.rrc_taps) + + if verbose: + self._print_verbage() + + if log: + self._setup_logging() + + # Connect + self.connect(self, self.bytes2chunks, self.symbol_mapper, self.diffenc, + self.chunks2symbols, self.rrc_filter, self) + + def samples_per_symbol(self): + return self._samples_per_symbol + + def bits_per_symbol(self=None): # staticmethod that's also callable on an instance + return 8 + bits_per_symbol = staticmethod(bits_per_symbol) # make it a static method. RTFM + + def _print_verbage(self): + print "bits per symbol = %d" % self.bits_per_symbol() + print "Gray code = %s" % self._gray_code + print "RRS roll-off factor = %f" % self._excess_bw + + def _setup_logging(self): + print "Modulation logging turned on." + self.connect(self.bytes2chunks, + gr.file_sink(gr.sizeof_char, "bytes2chunks.dat")) + self.connect(self.symbol_mapper, + gr.file_sink(gr.sizeof_char, "graycoder.dat")) + self.connect(self.diffenc, + gr.file_sink(gr.sizeof_char, "diffenc.dat")) + self.connect(self.chunks2symbols, + gr.file_sink(gr.sizeof_gr_complex, "chunks2symbols.dat")) + self.connect(self.rrc_filter, + gr.file_sink(gr.sizeof_gr_complex, "rrc_filter.dat")) + + def add_options(parser): + """ + Adds QAM modulation-specific options to the standard parser + """ + parser.add_option("", "--excess-bw", type="float", default=_def_excess_bw, + help="set RRC excess bandwith factor [default=%default] (PSK)") + parser.add_option("", "--no-gray-code", dest="gray_code", + action="store_false", default=_def_gray_code, + help="disable gray coding on modulated bits (PSK)") + add_options=staticmethod(add_options) + + + def extract_kwargs_from_options(options): + """ + Given command line options, create dictionary suitable for passing to __init__ + """ + return modulation_utils.extract_kwargs_from_options(qam256_mod.__init__, + ('self',), options) + extract_kwargs_from_options=staticmethod(extract_kwargs_from_options) + + +# ///////////////////////////////////////////////////////////////////////////// +# QAM256 demodulator +# +# ///////////////////////////////////////////////////////////////////////////// + +class qam256_demod(gr.hier_block2): + + def __init__(self, + samples_per_symbol=_def_samples_per_symbol, + excess_bw=_def_excess_bw, + costas_alpha=_def_costas_alpha, + gain_mu=_def_gain_mu, + mu=_def_mu, + omega_relative_limit=_def_omega_relative_limit, + gray_code=_def_gray_code, + verbose=_def_verbose, + log=_def_log): + + gr.hier_block2.__init__(self, "qam256_demod", + gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature + gr.io_signature(1, 1, gr.sizeof_char)) # Output signature + + # do this + pass + + def bits_per_symbol(self=None): # staticmethod that's also callable on an instance + return 8 + bits_per_symbol = staticmethod(bits_per_symbol) # make it a static method. RTFM + +# +# Add these to the mod/demod registry +# +# NOT READY TO BE USED YET -- ENABLE AT YOUR OWN RISK +#modulation_utils.add_type_1_mod('qam256', qam256_mod) +#modulation_utils.add_type_1_demod('qam256', qam256_demod) diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/qam64.py b/gnuradio-core/src/python/gnuradio/blks2impl/qam64.py new file mode 100644 index 0000000000..5509f37458 --- /dev/null +++ b/gnuradio-core/src/python/gnuradio/blks2impl/qam64.py @@ -0,0 +1,208 @@ +# +# Copyright 2005,2006,2007 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. +# + +# See gnuradio-examples/python/digital for examples + +""" +differential QPSK modulation and demodulation. +""" + +from gnuradio import gr, gru, modulation_utils +from math import pi, sqrt +import qam +import cmath +from pprint import pprint + +# default values (used in __init__ and add_options) +_def_samples_per_symbol = 2 +_def_excess_bw = 0.35 +_def_gray_code = True +_def_verbose = False +_def_log = False + +_def_costas_alpha = None +_def_gain_mu = 0.03 +_def_mu = 0.05 +_def_omega_relative_limit = 0.005 + + +# ///////////////////////////////////////////////////////////////////////////// +# QAM64 modulator +# ///////////////////////////////////////////////////////////////////////////// + +class qam64_mod(gr.hier_block2): + + def __init__(self, + samples_per_symbol=_def_samples_per_symbol, + excess_bw=_def_excess_bw, + gray_code=_def_gray_code, + verbose=_def_verbose, + log=_def_log): + + """ + Hierarchical block for RRC-filtered QPSK modulation. + + The input is a byte stream (unsigned char) and the + output is the complex modulated signal at baseband. + + @param samples_per_symbol: samples per symbol >= 2 + @type samples_per_symbol: integer + @param excess_bw: Root-raised cosine filter excess bandwidth + @type excess_bw: float + @param gray_code: Tell modulator to Gray code the bits + @type gray_code: bool + @param verbose: Print information about modulator? + @type verbose: bool + @param debug: Print modualtion data to files? + @type debug: bool + """ + + gr.hier_block2.__init__(self, "qam64_mod", + gr.io_signature(1, 1, gr.sizeof_char), # Input signature + gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature + self._samples_per_symbol = samples_per_symbol + self._excess_bw = excess_bw + self._gray_code = gray_code + + if not isinstance(samples_per_symbol, int) or samples_per_symbol < 2: + raise TypeError, ("sbp must be an integer >= 2, is %d" % samples_per_symbol) + + ntaps = 11 * samples_per_symbol + + arity = pow(2, self.bits_per_symbol()) + + # turn bytes into k-bit vectors + self.bytes2chunks = \ + gr.packed_to_unpacked_bb(self.bits_per_symbol(), gr.GR_MSB_FIRST) + + if self._gray_code: + self.symbol_mapper = gr.map_bb(qam.binary_to_gray[arity]) + else: + self.symbol_mapper = gr.map_bb(qam.binary_to_ungray[arity]) + + self.diffenc = gr.diff_encoder_bb(arity) + + rot = 1.0 + print "constellation with %d arity" % arity + rotated_const = map(lambda pt: pt * rot, qam.constellation[arity]) + self.chunks2symbols = gr.chunks_to_symbols_bc(rotated_const) + + # pulse shaping filter + self.rrc_taps = gr.firdes.root_raised_cosine( + self._samples_per_symbol, # gain (sps since we're interpolating by sps) + self._samples_per_symbol, # sampling rate + 1.0, # symbol rate + self._excess_bw, # excess bandwidth (roll-off factor) + ntaps) + + self.rrc_filter = gr.interp_fir_filter_ccf(self._samples_per_symbol, self.rrc_taps) + + if verbose: + self._print_verbage() + + if log: + self._setup_logging() + + # Connect + self.connect(self, self.bytes2chunks, self.symbol_mapper, self.diffenc, + self.chunks2symbols, self.rrc_filter, self) + + def samples_per_symbol(self): + return self._samples_per_symbol + + def bits_per_symbol(self=None): # staticmethod that's also callable on an instance + return 6 + bits_per_symbol = staticmethod(bits_per_symbol) # make it a static method. RTFM + + def _print_verbage(self): + print "bits per symbol = %d" % self.bits_per_symbol() + print "Gray code = %s" % self._gray_code + print "RRS roll-off factor = %f" % self._excess_bw + + def _setup_logging(self): + print "Modulation logging turned on." + self.connect(self.bytes2chunks, + gr.file_sink(gr.sizeof_char, "bytes2chunks.dat")) + self.connect(self.symbol_mapper, + gr.file_sink(gr.sizeof_char, "graycoder.dat")) + self.connect(self.diffenc, + gr.file_sink(gr.sizeof_char, "diffenc.dat")) + self.connect(self.chunks2symbols, + gr.file_sink(gr.sizeof_gr_complex, "chunks2symbols.dat")) + self.connect(self.rrc_filter, + gr.file_sink(gr.sizeof_gr_complex, "rrc_filter.dat")) + + def add_options(parser): + """ + Adds QAM modulation-specific options to the standard parser + """ + parser.add_option("", "--excess-bw", type="float", default=_def_excess_bw, + help="set RRC excess bandwith factor [default=%default] (PSK)") + parser.add_option("", "--no-gray-code", dest="gray_code", + action="store_false", default=_def_gray_code, + help="disable gray coding on modulated bits (PSK)") + add_options=staticmethod(add_options) + + + def extract_kwargs_from_options(options): + """ + Given command line options, create dictionary suitable for passing to __init__ + """ + return modulation_utils.extract_kwargs_from_options(qam64_mod.__init__, + ('self',), options) + extract_kwargs_from_options=staticmethod(extract_kwargs_from_options) + + +# ///////////////////////////////////////////////////////////////////////////// +# QAM16 demodulator +# +# ///////////////////////////////////////////////////////////////////////////// + +class qam64_demod(gr.hier_block2): + + def __init__(self, + samples_per_symbol=_def_samples_per_symbol, + excess_bw=_def_excess_bw, + costas_alpha=_def_costas_alpha, + gain_mu=_def_gain_mu, + mu=_def_mu, + omega_relative_limit=_def_omega_relative_limit, + gray_code=_def_gray_code, + verbose=_def_verbose, + log=_def_log): + + gr.hier_block2.__init__(self, "qam64_demod", + gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature + gr.io_signature(1, 1, gr.sizeof_char)) # Output signature + + # do this + pass + + def bits_per_symbol(self=None): # staticmethod that's also callable on an instance + return 6 + bits_per_symbol = staticmethod(bits_per_symbol) # make it a static method. RTFM + +# +# Add these to the mod/demod registry +# +# NOT READY TO BE USED YET -- ENABLE AT YOUR OWN RISK +#modulation_utils.add_type_1_mod('qam64', qam64_mod) +#modulation_utils.add_type_1_demod('qam16', qam16_demod) diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/qam8.py b/gnuradio-core/src/python/gnuradio/blks2impl/qam8.py new file mode 100644 index 0000000000..977dec930a --- /dev/null +++ b/gnuradio-core/src/python/gnuradio/blks2impl/qam8.py @@ -0,0 +1,209 @@ +# +# Copyright 2005,2006,2007 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. +# + +# See gnuradio-examples/python/digital for examples + +""" +QAM8 modulation and demodulation. +""" + +from gnuradio import gr, gru, modulation_utils +from math import pi, sqrt +import qam +import cmath +from pprint import pprint + +# default values (used in __init__ and add_options) +_def_samples_per_symbol = 2 +_def_excess_bw = 0.35 +_def_gray_code = True +_def_verbose = False +_def_log = False + +_def_costas_alpha = None +_def_gain_mu = 0.03 +_def_mu = 0.05 +_def_omega_relative_limit = 0.005 + + +# ///////////////////////////////////////////////////////////////////////////// +# QAM8 modulator +# ///////////////////////////////////////////////////////////////////////////// + +class qam8_mod(gr.hier_block2): + + def __init__(self, + samples_per_symbol=_def_samples_per_symbol, + excess_bw=_def_excess_bw, + gray_code=_def_gray_code, + verbose=_def_verbose, + log=_def_log): + + """ + Hierarchical block for RRC-filtered QPSK modulation. + + The input is a byte stream (unsigned char) and the + output is the complex modulated signal at baseband. + + @param samples_per_symbol: samples per symbol >= 2 + @type samples_per_symbol: integer + @param excess_bw: Root-raised cosine filter excess bandwidth + @type excess_bw: float + @param gray_code: Tell modulator to Gray code the bits + @type gray_code: bool + @param verbose: Print information about modulator? + @type verbose: bool + @param debug: Print modualtion data to files? + @type debug: bool + """ + + gr.hier_block2.__init__(self, "qam8_mod", + gr.io_signature(1, 1, gr.sizeof_char), # Input signature + gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature + + self._samples_per_symbol = samples_per_symbol + self._excess_bw = excess_bw + self._gray_code = gray_code + + if not isinstance(samples_per_symbol, int) or samples_per_symbol < 2: + raise TypeError, ("sbp must be an integer >= 2, is %d" % samples_per_symbol) + + ntaps = 11 * samples_per_symbol + + arity = pow(2, self.bits_per_symbol()) + + # turn bytes into k-bit vectors + self.bytes2chunks = \ + gr.packed_to_unpacked_bb(self.bits_per_symbol(), gr.GR_MSB_FIRST) + + if self._gray_code: + self.symbol_mapper = gr.map_bb(qam.binary_to_gray[arity]) + else: + self.symbol_mapper = gr.map_bb(qam.binary_to_ungray[arity]) + + self.diffenc = gr.diff_encoder_bb(arity) + + rot = 1.0 + print "constellation with %d arity" % arity + rotated_const = map(lambda pt: pt * rot, qam.constellation[arity]) + self.chunks2symbols = gr.chunks_to_symbols_bc(rotated_const) + + # pulse shaping filter + self.rrc_taps = gr.firdes.root_raised_cosine( + self._samples_per_symbol, # gain (sps since we're interpolating by sps) + self._samples_per_symbol, # sampling rate + 1.0, # symbol rate + self._excess_bw, # excess bandwidth (roll-off factor) + ntaps) + + self.rrc_filter = gr.interp_fir_filter_ccf(self._samples_per_symbol, self.rrc_taps) + + if verbose: + self._print_verbage() + + if log: + self._setup_logging() + + # Connect + self.connect(self, self.bytes2chunks, self.symbol_mapper, self.diffenc, + self.chunks2symbols, self.rrc_filter, self) + + def samples_per_symbol(self): + return self._samples_per_symbol + + def bits_per_symbol(self=None): # staticmethod that's also callable on an instance + return 3 + bits_per_symbol = staticmethod(bits_per_symbol) # make it a static method. RTFM + + def _print_verbage(self): + print "bits per symbol = %d" % self.bits_per_symbol() + print "Gray code = %s" % self._gray_code + print "RRS roll-off factor = %f" % self._excess_bw + + def _setup_logging(self): + print "Modulation logging turned on." + self.connect(self.bytes2chunks, + gr.file_sink(gr.sizeof_char, "bytes2chunks.dat")) + self.connect(self.symbol_mapper, + gr.file_sink(gr.sizeof_char, "graycoder.dat")) + self.connect(self.diffenc, + gr.file_sink(gr.sizeof_char, "diffenc.dat")) + self.connect(self.chunks2symbols, + gr.file_sink(gr.sizeof_gr_complex, "chunks2symbols.dat")) + self.connect(self.rrc_filter, + gr.file_sink(gr.sizeof_gr_complex, "rrc_filter.dat")) + + def add_options(parser): + """ + Adds QAM modulation-specific options to the standard parser + """ + parser.add_option("", "--excess-bw", type="float", default=_def_excess_bw, + help="set RRC excess bandwith factor [default=%default] (PSK)") + parser.add_option("", "--no-gray-code", dest="gray_code", + action="store_false", default=_def_gray_code, + help="disable gray coding on modulated bits (PSK)") + add_options=staticmethod(add_options) + + + def extract_kwargs_from_options(options): + """ + Given command line options, create dictionary suitable for passing to __init__ + """ + return modulation_utils.extract_kwargs_from_options(qam8_mod.__init__, + ('self',), options) + extract_kwargs_from_options=staticmethod(extract_kwargs_from_options) + + +# ///////////////////////////////////////////////////////////////////////////// +# QAM8 demodulator +# +# ///////////////////////////////////////////////////////////////////////////// + +class qam8_demod(gr.hier_block2): + + def __init__(self, + samples_per_symbol=_def_samples_per_symbol, + excess_bw=_def_excess_bw, + costas_alpha=_def_costas_alpha, + gain_mu=_def_gain_mu, + mu=_def_mu, + omega_relative_limit=_def_omega_relative_limit, + gray_code=_def_gray_code, + verbose=_def_verbose, + log=_def_log): + + gr.hier_block2.__init__(self, "qam8_demod", + gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature + gr.io_signature(1, 1, gr.sizeof_gr_char)) # Output signature + + # do this + pass + + def bits_per_symbol(self=None): # staticmethod that's also callable on an instance + return 3 + bits_per_symbol = staticmethod(bits_per_symbol) # make it a static method. RTFM + +# +# Add these to the mod/demod registry +# +# NOT READY TO BE USED YET -- ENABLE AT YOUR OWN RISK +modulation_utils.add_type_1_mod('qam8', qam8_mod) +#modulation_utils.add_type_1_demod('qam8', qam8_demod) diff --git a/gnuradio-core/src/python/gnuradio/blksimpl2/rational_resampler.py b/gnuradio-core/src/python/gnuradio/blks2impl/rational_resampler.py index cbd59b08a2..b7de0de7cf 100644 --- a/gnuradio-core/src/python/gnuradio/blksimpl2/rational_resampler.py +++ b/gnuradio-core/src/python/gnuradio/blks2impl/rational_resampler.py @@ -96,9 +96,9 @@ class _rational_resampler_base(gr.hier_block2): taps = design_filter(interpolation, decimation, fractional_bw) resampler = resampler_base(interpolation, decimation, taps) - gr.hier_block2.__init__(self, resampler.name(), + gr.hier_block2.__init__(self, "rational_resampler", gr.io_signature(1, 1, resampler.input_signature().sizeof_stream_item(0)), - gr.io_signature(1, 1, resampler.output_signature().sizeof_stream_item(1))) + gr.io_signature(1, 1, resampler.output_signature().sizeof_stream_item(0))) self.connect(self, resampler, self) diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/standard_squelch.py b/gnuradio-core/src/python/gnuradio/blks2impl/standard_squelch.py new file mode 100644 index 0000000000..c5fdc01dbc --- /dev/null +++ b/gnuradio-core/src/python/gnuradio/blks2impl/standard_squelch.py @@ -0,0 +1,76 @@ +# +# Copyright 2005,2007 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. +# + +import math +from gnuradio import gr, optfir + +class standard_squelch(gr.hier_block2): + def __init__(self, audio_rate): + gr.hier_block2.__init__(self, "standard_squelch", + gr.io_signature(1, 1, gr.sizeof_float), # Input signature + gr.io_signature(1, 1, gr.sizeof_float)) # Output signature + + self.input_node = gr.add_const_ff(0) # FIXME kludge + + self.low_iir = gr.iir_filter_ffd((0.0193,0,-0.0193),(1,1.9524,-0.9615)) + self.low_square = gr.multiply_ff() + self.low_smooth = gr.single_pole_iir_filter_ff(1/(0.01*audio_rate)) # 100ms time constant + + self.hi_iir = gr.iir_filter_ffd((0.0193,0,-0.0193),(1,1.3597,-0.9615)) + self.hi_square = gr.multiply_ff() + self.hi_smooth = gr.single_pole_iir_filter_ff(1/(0.01*audio_rate)) + + self.sub = gr.sub_ff(); + self.add = gr.add_ff(); + self.gate = gr.threshold_ff(0.3,0.43,0) + self.squelch_lpf = gr.single_pole_iir_filter_ff(1/(0.01*audio_rate)) + + self.div = gr.divide_ff() + self.squelch_mult = gr.multiply_ff() + + self.connect (self, self.input_node) + self.connect (self.input_node, (self.squelch_mult, 0)) + + self.connect (self.input_node,self.low_iir) + self.connect (self.low_iir,(self.low_square,0)) + self.connect (self.low_iir,(self.low_square,1)) + self.connect (self.low_square,self.low_smooth,(self.sub,0)) + self.connect (self.low_smooth, (self.add,0)) + + self.connect (self.input_node,self.hi_iir) + self.connect (self.hi_iir,(self.hi_square,0)) + self.connect (self.hi_iir,(self.hi_square,1)) + self.connect (self.hi_square,self.hi_smooth,(self.sub,1)) + self.connect (self.hi_smooth, (self.add,1)) + + self.connect (self.sub, (self.div, 0)) + self.connect (self.add, (self.div, 1)) + self.connect (self.div, self.gate, self.squelch_lpf, (self.squelch_mult,1)) + self.connect (self.squelch_mult, self) + + def set_threshold(self, threshold): + self.gate.set_hi(threshold) + + def threshold(self): + return self.gate.hi() + + def squelch_range(self): + return (0.0, 1.0, 1.0/100) diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/wfm_rcv.py b/gnuradio-core/src/python/gnuradio/blks2impl/wfm_rcv.py new file mode 100644 index 0000000000..3bdb22cce9 --- /dev/null +++ b/gnuradio-core/src/python/gnuradio/blks2impl/wfm_rcv.py @@ -0,0 +1,69 @@ +# +# Copyright 2005,2007 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. +# + +from gnuradio import gr +from gnuradio.blks2impl.fm_emph import fm_deemph +import math + +class wfm_rcv(gr.hier_block2): + def __init__ (self, quad_rate, audio_decimation): + """ + Hierarchical block for demodulating a broadcast FM signal. + + The input is the downconverted complex baseband signal (gr_complex). + The output is the demodulated audio (float). + + @param quad_rate: input sample rate of complex baseband input. + @type quad_rate: float + @param audio_decimation: how much to decimate quad_rate to get to audio. + @type audio_decimation: integer + """ + gr.hier_block2.__init__(self, "wfm_rcv", + gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature + gr.io_signature(1, 1, gr.sizeof_float)) # Output signature + + volume = 20. + + max_dev = 75e3 + fm_demod_gain = quad_rate/(2*math.pi*max_dev) + audio_rate = quad_rate / audio_decimation + + + # We assign to self so that outsiders can grab the demodulator + # if they need to. E.g., to plot its output. + # + # input: complex; output: float + self.fm_demod = gr.quadrature_demod_cf (fm_demod_gain) + + # input: float; output: float + self.deemph = fm_deemph (audio_rate) + + # compute FIR filter taps for audio filter + width_of_transition_band = audio_rate / 32 + audio_coeffs = gr.firdes.low_pass (1.0, # gain + quad_rate, # sampling rate + audio_rate/2 - width_of_transition_band, + width_of_transition_band, + gr.firdes.WIN_HAMMING) + # input: float; output: float + self.audio_filter = gr.fir_filter_fff (audio_decimation, audio_coeffs) + + self.connect (self, self.fm_demod, self.audio_filter, self.deemph, self) diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/wfm_rcv_pll.py b/gnuradio-core/src/python/gnuradio/blks2impl/wfm_rcv_pll.py new file mode 100644 index 0000000000..d7a930754b --- /dev/null +++ b/gnuradio-core/src/python/gnuradio/blks2impl/wfm_rcv_pll.py @@ -0,0 +1,192 @@ +# +# Copyright 2005,2006 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. +# + +from gnuradio import gr +from gnuradio.blks2impl.fm_emph import fm_deemph +import math + +class wfm_rcv_pll(gr.hier_block2): + def __init__ (self, demod_rate, audio_decimation): + """ + Hierarchical block for demodulating a broadcast FM signal. + + The input is the downconverted complex baseband signal (gr_complex). + The output is two streams of the demodulated audio (float) 0=Left, 1=Right. + + @param demod_rate: input sample rate of complex baseband input. + @type demod_rate: float + @param audio_decimation: how much to decimate demod_rate to get to audio. + @type audio_decimation: integer + """ + gr.hier_block2.__init__(self, "wfm_rcv_pll", + gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature + gr.io_signature(1, 2, gr.sizeof_float)) # Output signature + bandwidth = 200e3 + audio_rate = demod_rate / audio_decimation + + + # We assign to self so that outsiders can grab the demodulator + # if they need to. E.g., to plot its output. + # + # input: complex; output: float + alpha = 0.25*bandwidth * math.pi / demod_rate + beta = alpha * alpha / 4.0 + max_freq = 2.0*math.pi*100e3/demod_rate + + self.fm_demod = gr.pll_freqdet_cf (alpha,beta,max_freq,-max_freq) + + # input: float; output: float + self.deemph_Left = fm_deemph (audio_rate) + self.deemph_Right = fm_deemph (audio_rate) + + # compute FIR filter taps for audio filter + width_of_transition_band = audio_rate / 32 + audio_coeffs = gr.firdes.low_pass (1.0 , # gain + demod_rate, # sampling rate + 15000 , + width_of_transition_band, + gr.firdes.WIN_HAMMING) + # input: float; output: float + self.audio_filter = gr.fir_filter_fff (audio_decimation, audio_coeffs) + if 1: + # Pick off the stereo carrier/2 with this filter. It attenuated 10 dB so apply 10 dB gain + # We pick off the negative frequency half because we want to base band by it! + ## NOTE THIS WAS HACKED TO OFFSET INSERTION LOSS DUE TO DEEMPHASIS + + stereo_carrier_filter_coeffs = gr.firdes.complex_band_pass(10.0, + demod_rate, + -19020, + -18980, + width_of_transition_band, + gr.firdes.WIN_HAMMING) + + #print "len stereo carrier filter = ",len(stereo_carrier_filter_coeffs) + #print "stereo carrier filter ", stereo_carrier_filter_coeffs + #print "width of transition band = ",width_of_transition_band, " audio rate = ", audio_rate + + # Pick off the double side band suppressed carrier Left-Right audio. It is attenuated 10 dB so apply 10 dB gain + + stereo_dsbsc_filter_coeffs = gr.firdes.complex_band_pass(20.0, + demod_rate, + 38000-15000/2, + 38000+15000/2, + width_of_transition_band, + gr.firdes.WIN_HAMMING) + #print "len stereo dsbsc filter = ",len(stereo_dsbsc_filter_coeffs) + #print "stereo dsbsc filter ", stereo_dsbsc_filter_coeffs + # construct overlap add filter system from coefficients for stereo carrier + + self.stereo_carrier_filter = gr.fir_filter_fcc(audio_decimation, stereo_carrier_filter_coeffs) + + # carrier is twice the picked off carrier so arrange to do a commplex multiply + + self.stereo_carrier_generator = gr.multiply_cc(); + + # Pick off the rds signal + + stereo_rds_filter_coeffs = gr.firdes.complex_band_pass(30.0, + demod_rate, + 57000 - 1500, + 57000 + 1500, + width_of_transition_band, + gr.firdes.WIN_HAMMING) + #print "len stereo dsbsc filter = ",len(stereo_dsbsc_filter_coeffs) + #print "stereo dsbsc filter ", stereo_dsbsc_filter_coeffs + # construct overlap add filter system from coefficients for stereo carrier + + self.stereo_carrier_filter = gr.fir_filter_fcc(audio_decimation, stereo_carrier_filter_coeffs) + self.rds_signal_filter = gr.fir_filter_fcc(audio_decimation, stereo_rds_filter_coeffs) + + + + + + + self.rds_carrier_generator = gr.multiply_cc(); + self.rds_signal_generator = gr.multiply_cc(); + self_rds_signal_processor = gr.null_sink(gr.sizeof_gr_complex); + + + + alpha = 5 * 0.25 * math.pi / (audio_rate) + beta = alpha * alpha / 4.0 + max_freq = -2.0*math.pi*18990/audio_rate; + min_freq = -2.0*math.pi*19010/audio_rate; + + self.stereo_carrier_pll_recovery = gr.pll_refout_cc(alpha,beta,max_freq,min_freq); + #self.stereo_carrier_pll_recovery.squelch_enable(False) #pll_refout does not have squelch yet, so disabled for now + + + # set up mixer (multiplier) to get the L-R signal at baseband + + self.stereo_basebander = gr.multiply_cc(); + + # pick off the real component of the basebanded L-R signal. The imaginary SHOULD be zero + + self.LmR_real = gr.complex_to_real(); + self.Make_Left = gr.add_ff(); + self.Make_Right = gr.sub_ff(); + + self.stereo_dsbsc_filter = gr.fir_filter_fcc(audio_decimation, stereo_dsbsc_filter_coeffs) + + + if 1: + + # send the real signal to complex filter to pick off the carrier and then to one side of a multiplier + self.connect (self, self.fm_demod,self.stereo_carrier_filter,self.stereo_carrier_pll_recovery, (self.stereo_carrier_generator,0)) + # send the already filtered carrier to the otherside of the carrier + self.connect (self.stereo_carrier_pll_recovery, (self.stereo_carrier_generator,1)) + # the resulting signal from this multiplier is the carrier with correct phase but at -38000 Hz. + + # send the new carrier to one side of the mixer (multiplier) + self.connect (self.stereo_carrier_generator, (self.stereo_basebander,0)) + # send the demphasized audio to the DSBSC pick off filter, the complex + # DSBSC signal at +38000 Hz is sent to the other side of the mixer/multiplier + self.connect (self.fm_demod,self.stereo_dsbsc_filter, (self.stereo_basebander,1)) + # the result is BASEBANDED DSBSC with phase zero! + + # Pick off the real part since the imaginary is theoretically zero and then to one side of a summer + self.connect (self.stereo_basebander, self.LmR_real, (self.Make_Left,0)) + #take the same real part of the DSBSC baseband signal and send it to negative side of a subtracter + self.connect (self.LmR_real,(self.Make_Right,1)) + + # Make rds carrier by taking the squared pilot tone and multiplying by pilot tone + self.connect (self.stereo_basebander,(self.rds_carrier_generator,0)) + self.connect (self.stereo_carrier_pll_recovery,(self.rds_carrier_generator,1)) + # take signal, filter off rds, send into mixer 0 channel + self.connect (self.fm_demod,self.rds_signal_filter,(self.rds_signal_generator,0)) + # take rds_carrier_generator output and send into mixer 1 channel + self.connect (self.rds_carrier_generator,(self.rds_signal_generator,1)) + # send basebanded rds signal and send into "processor" which for now is a null sink + self.connect (self.rds_signal_generator,self_rds_signal_processor) + + + if 1: + # pick off the audio, L+R that is what we used to have and send it to the summer + self.connect(self.fm_demod, self.audio_filter, (self.Make_Left, 1)) + # take the picked off L+R audio and send it to the PLUS side of the subtractor + self.connect(self.audio_filter,(self.Make_Right, 0)) + # The result of Make_Left gets (L+R) + (L-R) and results in 2*L + # The result of Make_Right gets (L+R) - (L-R) and results in 2*R + self.connect(self.Make_Left , self.deemph_Left, (self, 0)) + self.connect(self.Make_Right, self.deemph_Right, (self, 1)) + else: + self.connect (self.fm_demod, self.audio_filter, self) diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/wfm_tx.py b/gnuradio-core/src/python/gnuradio/blks2impl/wfm_tx.py new file mode 100644 index 0000000000..c7c831ca16 --- /dev/null +++ b/gnuradio-core/src/python/gnuradio/blks2impl/wfm_tx.py @@ -0,0 +1,79 @@ +# +# Copyright 2005,2007 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. +# + +import math +from gnuradio import gr, optfir +from gnuradio.blks2impl.fm_emph import fm_preemph + +class wfm_tx(gr.hier_block2): + def __init__(self, audio_rate, quad_rate, tau=75e-6, max_dev=75e3): + """ + Wide Band FM Transmitter. + + Takes a single float input stream of audio samples in the range [-1,+1] + and produces a single FM modulated complex baseband output. + + @param audio_rate: sample rate of audio stream, >= 16k + @type audio_rate: integer + @param quad_rate: sample rate of output stream + @type quad_rate: integer + @param tau: preemphasis time constant (default 75e-6) + @type tau: float + @param max_dev: maximum deviation in Hz (default 75e3) + @type max_dev: float + + quad_rate must be an integer multiple of audio_rate. + """ + gr.hier_block2.__init__(self, "wfm_tx", + gr.io_signature(1, 1, gr.sizeof_float), # Input signature + gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature + + # FIXME audio_rate and quad_rate ought to be exact rationals + audio_rate = int(audio_rate) + quad_rate = int(quad_rate) + + if quad_rate % audio_rate != 0: + raise ValueError, "quad_rate is not an integer multiple of audio_rate" + + + do_interp = audio_rate != quad_rate + + if do_interp: + interp_factor = quad_rate / audio_rate + interp_taps = optfir.low_pass (interp_factor, # gain + quad_rate, # Fs + 16000, # passband cutoff + 18000, # stopband cutoff + 0.1, # passband ripple dB + 40) # stopband atten dB + + print "len(interp_taps) =", len(interp_taps) + self.interpolator = gr.interp_fir_filter_fff (interp_factor, interp_taps) + + self.preemph = fm_preemph (quad_rate, tau=tau) + + k = 2 * math.pi * max_dev / quad_rate + self.modulator = gr.frequency_modulator_fc (k) + + if do_interp: + self.connect (self, self.interpolator, self.preemph, self.modulator, self) + else: + self.connect(self, self.preemph, self.modulator, self) diff --git a/gnuradio-core/src/python/gnuradio/gr/hier_block2.py b/gnuradio-core/src/python/gnuradio/gr/hier_block2.py index bc6402b872..1c096b709e 100644 --- a/gnuradio-core/src/python/gnuradio/gr/hier_block2.py +++ b/gnuradio-core/src/python/gnuradio/gr/hier_block2.py @@ -37,13 +37,17 @@ class hier_block2(object): return getattr(self._hb, name) def connect(self, *points): - '''connect requires two or more arguments that can be coerced to endpoints. + '''connect requires one or more arguments that can be coerced to endpoints. If more than two arguments are provided, they are connected together successively. ''' - if len (points) < 2: - raise ValueError, ("connect requires at least two endpoints; %d provided." % (len (points),)) - for i in range (1, len (points)): - self._connect(points[i-1], points[i]) + if len (points) < 1: + raise ValueError, ("connect requires at least one endpoint; %d provided." % (len (points),)) + else: + if len(points) == 1: + self._hb.connect(points[0].basic_block()) + else: + for i in range (1, len (points)): + self._connect(points[i-1], points[i]) def _connect(self, src, dst): (src_block, src_port) = self._coerce_endpoint(src) @@ -61,13 +65,17 @@ class hier_block2(object): raise ValueError("unable to coerce endpoint") def disconnect(self, *points): - '''connect requires two or more arguments that can be coerced to endpoints. + '''connect requires one or more arguments that can be coerced to endpoints. If more than two arguments are provided, they are disconnected successively. ''' - if len (points) < 2: + if len (points) < 1: raise ValueError, ("disconnect requires at least two endpoints; %d provided." % (len (points),)) - for i in range (1, len (points)): - self._disconnect(points[i-1], points[i]) + else: + if len (points) == 1: + self._hb.disconnect(points[0].basic_block()) + else: + for i in range (1, len (points)): + self._disconnect(points[i-1], points[i]) def _disconnect(self, src, dst): (src_block, src_port) = self._coerce_endpoint(src) diff --git a/gnuradio-core/src/python/gnuradio/gr/qa_hier_block2.py b/gnuradio-core/src/python/gnuradio/gr/qa_hier_block2.py index d07d4cb389..7249a2194f 100755 --- a/gnuradio-core/src/python/gnuradio/gr/qa_hier_block2.py +++ b/gnuradio-core/src/python/gnuradio/gr/qa_hier_block2.py @@ -187,5 +187,58 @@ class test_hier_block2(gr_unittest.TestCase): hblock.run() self.assertEquals(data, dst.data()) + def test_021_connect_single(self): + hblock = gr.top_block("test_block") + blk = gr.hier_block2("block", + gr.io_signature(0, 0, 0), + gr.io_signature(0, 0, 0)) + hblock.connect(blk) + + def test_022_connect_single_with_ports(self): + hblock = gr.top_block("test_block") + blk = gr.hier_block2("block", + gr.io_signature(1, 1, 1), + gr.io_signature(1, 1, 1)) + self.assertRaises(ValueError, + lambda: hblock.connect(blk)) + + def test_023_connect_single_twice(self): + hblock = gr.top_block("test_block") + blk = gr.hier_block2("block", + gr.io_signature(0, 0, 0), + gr.io_signature(0, 0, 0)) + hblock.connect(blk) + self.assertRaises(ValueError, + lambda: hblock.connect(blk)) + + def test_024_disconnect_single(self): + hblock = gr.top_block("test_block") + blk = gr.hier_block2("block", + gr.io_signature(0, 0, 0), + gr.io_signature(0, 0, 0)) + hblock.connect(blk) + hblock.disconnect(blk) + + def test_025_disconnect_single_not_connected(self): + hblock = gr.top_block("test_block") + blk = gr.hier_block2("block", + gr.io_signature(0, 0, 0), + gr.io_signature(0, 0, 0)) + self.assertRaises(ValueError, + lambda: hblock.disconnect(blk)) + + def test_026_run_single(self): + expected_data = (1.0,) + tb = gr.top_block("top_block") + hb = gr.hier_block2("block", + gr.io_signature(0, 0, 0), + gr.io_signature(0, 0, 0)) + src = gr.vector_source_f(expected_data) + dst = gr.vector_sink_f() + hb.connect(src, dst) + tb.connect(hb) + tb.run() + self.assertEquals(expected_data, dst.data()) + if __name__ == "__main__": gr_unittest.main() diff --git a/gnuradio-core/src/python/gnuradio/gr/top_block.py b/gnuradio-core/src/python/gnuradio/gr/top_block.py index 9b709c01dd..8bd4052c9f 100644 --- a/gnuradio-core/src/python/gnuradio/gr/top_block.py +++ b/gnuradio-core/src/python/gnuradio/gr/top_block.py @@ -51,13 +51,17 @@ class top_block(object): # in the original C++ class (gr_hier_block2), then they would all be inherited here def connect(self, *points): - '''connect requires two or more arguments that can be coerced to endpoints. + '''connect requires one or more arguments that can be coerced to endpoints. If more than two arguments are provided, they are connected together successively. ''' - if len (points) < 2: - raise ValueError, ("connect requires at least two endpoints; %d provided." % (len (points),)) - for i in range (1, len (points)): - self._connect(points[i-1], points[i]) + if len (points) < 1: + raise ValueError, ("connect requires at least one endpoint; %d provided." % (len (points),)) + else: + if len(points) == 1: + self._tb.connect(points[0].basic_block()) + else: + for i in range (1, len (points)): + self._connect(points[i-1], points[i]) def _connect(self, src, dst): (src_block, src_port) = self._coerce_endpoint(src) @@ -75,13 +79,17 @@ class top_block(object): raise ValueError("unable to coerce endpoint") def disconnect(self, *points): - '''connect requires two or more arguments that can be coerced to endpoints. + '''connect requires one or more arguments that can be coerced to endpoints. If more than two arguments are provided, they are disconnected successively. ''' - if len (points) < 2: + if len (points) < 1: raise ValueError, ("disconnect requires at least two endpoints; %d provided." % (len (points),)) - for i in range (1, len (points)): - self._disconnect(points[i-1], points[i]) + else: + if len(points) == 1: + self._tb.disconnect(points[0].basic_block()) + else: + for i in range (1, len (points)): + self._disconnect(points[i-1], points[i]) def _disconnect(self, src, dst): (src_block, src_port) = self._coerce_endpoint(src) |