diff options
| author | eb <eb@221aa14e-8319-0410-a670-987f0aec2ac5> | 2006-09-27 05:14:03 +0000 |
|---|---|---|
| committer | eb <eb@221aa14e-8319-0410-a670-987f0aec2ac5> | 2006-09-27 05:14:03 +0000 |
| commit | f1c41f807cb29472d0924149e39d6ec8ad90e6a2 (patch) | |
| tree | 47e42f8cdfc83aaa3b706e06862c3efa4ba16745 /gnuradio-core/src | |
| parent | 04bb51ec4f1539c51c861b7fcad2ca8047a872a3 (diff) | |
Merged changes from eb/digital-wip into trunk.
This includes:
* renaming gnuradio-examples/python/gmsk2 to gnuradio-examples/python/digital
* refactoring the digital data tx and rx test code into benchmark_tx
and benchmark_rx. These accept a -m <modulation> argument.
<modulation> can currently be selected from gmsk, dbpsk, dqpsk
* Two new AGC blocks: gr_agc2: separate attack and delay rates;
gr_feedforward_agc: FIR-ish compressor. Normalizes to peak envelope.
* Working DBPSK mod/demod (works fine)
* Working DQPSK mod/demod (works, but still needs more work)
git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@3662 221aa14e-8319-0410-a670-987f0aec2ac5
Diffstat (limited to 'gnuradio-core/src')
41 files changed, 2465 insertions, 396 deletions
diff --git a/gnuradio-core/src/lib/general/Makefile.am b/gnuradio-core/src/lib/general/Makefile.am index c22d8a7c05..ace399ab30 100644 --- a/gnuradio-core/src/lib/general/Makefile.am +++ b/gnuradio-core/src/lib/general/Makefile.am @@ -95,6 +95,8 @@ libgeneral_la_SOURCES = \ $(GENERATED_CC) \ gr_agc_cc.cc \ gr_agc_ff.cc \ + gr_agc2_cc.cc \ + gr_agc2_ff.cc \ gr_align_on_samplenumbers_ss.cc \ gr_binary_slicer_fb.cc \ gr_bytes_to_syms.cc \ @@ -120,6 +122,7 @@ libgeneral_la_SOURCES = \ gr_diff_phasor_cc.cc \ gr_fake_channel_coder_pp.cc \ gr_fast_atan2f.cc \ + gr_feedforward_agc_cc.cc \ gr_feval.cc \ gr_fft_vcc.cc \ gr_fft_vfc.cc \ @@ -213,6 +216,8 @@ grinclude_HEADERS = \ $(GENERATED_H) \ gr_agc_cc.h \ gr_agc_ff.h \ + gr_agc2_cc.h \ + gr_agc2_ff.h \ gr_align_on_samplenumbers_ss.h \ gr_binary_slicer_fb.h \ gr_bytes_to_syms.h \ @@ -239,6 +244,7 @@ grinclude_HEADERS = \ gr_endianness.h \ gr_expj.h \ gr_fake_channel_coder_pp.h \ + gr_feedforward_agc_cc.h \ gr_feval.h \ gr_fft_vcc.h \ gr_fft_vfc.h \ @@ -315,8 +321,10 @@ grinclude_HEADERS = \ gr_vector_to_stream.h \ gr_vector_to_streams.h \ gri_add_const_ss.h \ - gri_agc.h \ gri_agc_cc.h \ + gri_agc_ff.h \ + gri_agc2_cc.h \ + gri_agc2_ff.h \ gri_char_to_float.h \ gri_debugger_hook.h \ gri_fft.h \ @@ -348,6 +356,8 @@ swiginclude_HEADERS = \ general_generated.i \ gr_agc_cc.i \ gr_agc_ff.i \ + gr_agc2_cc.i \ + gr_agc2_ff.i \ gr_align_on_samplenumbers_ss.i \ gr_binary_slicer_fb.i \ gr_bytes_to_syms.i \ @@ -371,6 +381,7 @@ swiginclude_HEADERS = \ gr_deinterleave.i \ gr_endianness.i \ gr_fake_channel_coder_pp.i \ + gr_feedforward_agc_cc.i \ gr_feval.i \ gr_fft_vcc.i \ gr_fft_vfc.i \ @@ -432,9 +443,11 @@ swiginclude_HEADERS = \ gr_vco_f.i \ gr_vector_to_stream.i \ gr_vector_to_streams.i \ - gri_agc.i \ - gri_agc_cc.i \ - gr_unpack_k_bits_bb.i + gr_unpack_k_bits_bb.i \ + gri_agc_cc.i \ + gri_agc_ff.i \ + gri_agc2_cc.i \ + gri_agc2_ff.i CLEANFILES = $(BUILT_SOURCES) *.pyc diff --git a/gnuradio-core/src/lib/general/general.i b/gnuradio-core/src/lib/general/general.i index 2247a3e618..691cd83321 100644 --- a/gnuradio-core/src/lib/general/general.i +++ b/gnuradio-core/src/lib/general/general.i @@ -64,6 +64,8 @@ #include <gr_simple_squelch_cc.h> #include <gr_agc_ff.h> #include <gr_agc_cc.h> +#include <gr_agc2_ff.h> +#include <gr_agc2_cc.h> #include <gr_rms_cf.h> #include <gr_rms_ff.h> #include <gr_nlog10_ff.h> @@ -109,6 +111,7 @@ #include <gr_pwr_squelch_cc.h> #include <gr_pwr_squelch_ff.h> #include <gr_ctcss_squelch_ff.h> +#include <gr_feedforward_agc_cc.h> %} %include "gr_sync_block.i" @@ -154,6 +157,8 @@ %include "gr_simple_squelch_cc.i" %include "gr_agc_ff.i" %include "gr_agc_cc.i" +%include "gr_agc2_ff.i" +%include "gr_agc2_cc.i" %include "gr_rms_cf.i" %include "gr_rms_ff.i" %include "gr_nlog10_ff.i" @@ -199,5 +204,6 @@ %include "gr_pwr_squelch_cc.i" %include "gr_pwr_squelch_ff.i" %include "gr_ctcss_squelch_ff.i" +%include "gr_feedforward_agc_cc.i" %include "general_generated.i" diff --git a/gnuradio-core/src/lib/general/gr_agc2_cc.cc b/gnuradio-core/src/lib/general/gr_agc2_cc.cc new file mode 100644 index 0000000000..16bd64e3ea --- /dev/null +++ b/gnuradio-core/src/lib/general/gr_agc2_cc.cc @@ -0,0 +1,56 @@ +/* -*- c++ -*- */ +/* + * Copyright 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 2, 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. + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <gr_agc2_cc.h> +#include <gr_io_signature.h> +#include <gri_agc2_cc.h> + +gr_agc2_cc_sptr +gr_make_agc2_cc (float attack_rate, float decay_rate, float reference, + float gain, float max_gain) +{ + return gr_agc2_cc_sptr (new gr_agc2_cc (attack_rate, decay_rate, reference, gain, max_gain)); +} + +gr_agc2_cc::gr_agc2_cc (float attack_rate, float decay_rate, float reference, + float gain, float max_gain) + : gr_sync_block ("gr_agc2_cc", + gr_make_io_signature (1, 1, sizeof (gr_complex)), + gr_make_io_signature (1, 1, sizeof (gr_complex))), + gri_agc2_cc (attack_rate, decay_rate, reference, gain, max_gain) +{ +} + +int +gr_agc2_cc::work (int noutput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items) +{ + const gr_complex *in = (const gr_complex *) input_items[0]; + gr_complex *out = (gr_complex *) output_items[0]; + scaleN (out, in, noutput_items); + return noutput_items; +} diff --git a/gnuradio-core/src/lib/general/gr_agc2_cc.h b/gnuradio-core/src/lib/general/gr_agc2_cc.h new file mode 100644 index 0000000000..d022b780cb --- /dev/null +++ b/gnuradio-core/src/lib/general/gr_agc2_cc.h @@ -0,0 +1,54 @@ +/* -*- c++ -*- */ +/* + * Copyright 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 2, 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. + */ + +#ifndef INCLUDED_GR_AGC2_CC_H +#define INCLUDED_GR_AGC2_CC_H + +#include <gr_sync_block.h> +#include <gri_agc2_cc.h> + +class gr_agc2_cc; +typedef boost::shared_ptr<gr_agc2_cc> gr_agc2_cc_sptr; + +gr_agc2_cc_sptr +gr_make_agc2_cc (float attack_rate = 1e-1, float decay_rate = 1e-2, float reference = 1.0, + float gain = 1.0, float max_gain = 0.0); +/*! + * \brief high performance Automatic Gain Control class + * + * For Power the absolute value of the complex number is used. + */ + +class gr_agc2_cc : public gr_sync_block, public gri_agc2_cc +{ + friend gr_agc2_cc_sptr gr_make_agc2_cc (float attack_rate, float decay_rate, float reference, + float gain, float max_gain); + gr_agc2_cc (float attack_rate, float decay_rate, float reference, + float gain, float max_gain); + + public: + virtual int work (int noutput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items); +}; + +#endif /* INCLUDED_GR_AGC2_CC_H */ diff --git a/gnuradio-core/src/lib/general/gr_agc2_cc.i b/gnuradio-core/src/lib/general/gr_agc2_cc.i new file mode 100644 index 0000000000..666738ea74 --- /dev/null +++ b/gnuradio-core/src/lib/general/gr_agc2_cc.i @@ -0,0 +1,35 @@ +/* -*- c++ -*- */ +/* + * Copyright 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 2, 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. + */ + +GR_SWIG_BLOCK_MAGIC(gr,agc2_cc) + +%include <gri_agc2_cc.i> + +gr_agc2_cc_sptr +gr_make_agc2_cc (float attack_rate = 1e-1, float decay_rate = 1e-2, float reference = 1.0, + float gain = 1.0, float max_gain = 0.0); + +class gr_agc2_cc : public gr_sync_block , public gri_agc2_cc +{ + gr_agc2_cc (float attack_rate, float decay_rate, float reference, + float gain, float max_gain); +}; diff --git a/gnuradio-core/src/lib/general/gr_agc2_ff.cc b/gnuradio-core/src/lib/general/gr_agc2_ff.cc new file mode 100644 index 0000000000..23809934a5 --- /dev/null +++ b/gnuradio-core/src/lib/general/gr_agc2_ff.cc @@ -0,0 +1,57 @@ +/* -*- c++ -*- */ +/* + * 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 2, 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. + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <gr_agc2_ff.h> +#include <gr_io_signature.h> +#include <gri_agc2_ff.h> + +gr_agc2_ff_sptr +gr_make_agc2_ff (float attack_rate, float decay_rate, float reference, + float gain, float max_gain) +{ + return gr_agc2_ff_sptr (new gr_agc2_ff (attack_rate, decay_rate, reference, + gain, max_gain)); +} + +gr_agc2_ff::gr_agc2_ff (float attack_rate, float decay_rate, float reference, + float gain, float max_gain) + : gr_sync_block ("gr_agc2_ff", + gr_make_io_signature (1, 1, sizeof (float)), + gr_make_io_signature (1, 1, sizeof (float))) + , gri_agc2_ff (attack_rate, decay_rate, reference, gain, max_gain) +{ +} + +int +gr_agc2_ff::work (int noutput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items) +{ + const float *in = (const float *) input_items[0]; + float *out = (float *) output_items[0]; + scaleN (out, in, noutput_items); + return noutput_items; +} diff --git a/gnuradio-core/src/lib/general/gr_agc2_ff.h b/gnuradio-core/src/lib/general/gr_agc2_ff.h new file mode 100644 index 0000000000..25aa1d366c --- /dev/null +++ b/gnuradio-core/src/lib/general/gr_agc2_ff.h @@ -0,0 +1,52 @@ +/* -*- c++ -*- */ +/* + * 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 2, 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. + */ + +#ifndef INCLUDED_GR_AGC2_FF_H +#define INCLUDED_GR_AGC2_FF_H + +#include <gr_sync_block.h> +#include <gri_agc2_ff.h> +class gr_agc2_ff; +typedef boost::shared_ptr<gr_agc2_ff> gr_agc2_ff_sptr; + +gr_agc2_ff_sptr +gr_make_agc2_ff (float attack_rate = 1e-1, float decay_rate = 1e-2, float reference = 1.0, + float gain = 1.0, float max_gain = 0.0); +/*! + * \brief high performance Automatic Gain Control class + * + * Power is approximated by absolute value + */ + +class gr_agc2_ff : public gr_sync_block, public gri_agc2_ff +{ + friend gr_agc2_ff_sptr gr_make_agc2_ff (float attack_rate, float decay_rate, + float reference, float gain, float max_gain); + gr_agc2_ff (float attack_rate, float decay_rate, float reference, float gain, float max_gain); + + public: + virtual int work (int noutput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items); +}; + +#endif /* INCLUDED_GR_FLOAT_AGC2_FF_H */ diff --git a/gnuradio-core/src/lib/general/gr_agc2_ff.i b/gnuradio-core/src/lib/general/gr_agc2_ff.i new file mode 100644 index 0000000000..527dc61ae4 --- /dev/null +++ b/gnuradio-core/src/lib/general/gr_agc2_ff.i @@ -0,0 +1,35 @@ +/* -*- c++ -*- */ +/* + * 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 2, 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. + */ + +GR_SWIG_BLOCK_MAGIC(gr,agc2_ff) + +%include <gri_agc2_ff.i> + +gr_agc2_ff_sptr +gr_make_agc2_ff (float attack_rate = 1e-1, float decay_rate = 1e-2, float reference = 1.0, + float gain = 1.0, float max_gain = 0.0); + +class gr_agc2_ff : public gr_sync_block , public gri_agc2_ff +{ + gr_agc2_ff (float attack_rate, float decay_rate, float reference, + float gain, float max_gain); +}; diff --git a/gnuradio-core/src/lib/general/gr_agc_cc.cc b/gnuradio-core/src/lib/general/gr_agc_cc.cc index 6c6c4356d0..1aaa917e46 100644 --- a/gnuradio-core/src/lib/general/gr_agc_cc.cc +++ b/gnuradio-core/src/lib/general/gr_agc_cc.cc @@ -29,23 +29,25 @@ #include <gri_agc_cc.h> gr_agc_cc_sptr -gr_make_agc_cc (float rate, float reference, float gain, float max_gain) +gr_make_agc_cc (float rate, float reference, + float gain, float max_gain) { return gr_agc_cc_sptr (new gr_agc_cc (rate, reference, gain, max_gain)); } -gr_agc_cc::gr_agc_cc (float rate, float reference, float gain, float max_gain) +gr_agc_cc::gr_agc_cc (float rate, float reference, + float gain, float max_gain) : gr_sync_block ("gr_agc_cc", gr_make_io_signature (1, 1, sizeof (gr_complex)), - gr_make_io_signature (1, 1, sizeof (gr_complex))) - , gri_agc_cc (rate, reference, gain, max_gain) + gr_make_io_signature (1, 1, sizeof (gr_complex))), + gri_agc_cc (rate, reference, gain, max_gain) { } int gr_agc_cc::work (int noutput_items, - gr_vector_const_void_star &input_items, - gr_vector_void_star &output_items) + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items) { const gr_complex *in = (const gr_complex *) input_items[0]; gr_complex *out = (gr_complex *) output_items[0]; diff --git a/gnuradio-core/src/lib/general/gr_agc_cc.h b/gnuradio-core/src/lib/general/gr_agc_cc.h index 7bddd49998..18145da4b8 100644 --- a/gnuradio-core/src/lib/general/gr_agc_cc.h +++ b/gnuradio-core/src/lib/general/gr_agc_cc.h @@ -29,7 +29,8 @@ class gr_agc_cc; typedef boost::shared_ptr<gr_agc_cc> gr_agc_cc_sptr; gr_agc_cc_sptr -gr_make_agc_cc (float rate = 1e-4, float reference = 1.0, float gain = 1.0, float max_gain = 0.0); +gr_make_agc_cc (float rate = 1e-4, float reference = 1.0, + float gain = 1.0, float max_gain = 0.0); /*! * \brief high performance Automatic Gain Control class * @@ -38,8 +39,10 @@ gr_make_agc_cc (float rate = 1e-4, float reference = 1.0, float gain = 1.0, floa class gr_agc_cc : public gr_sync_block, public gri_agc_cc { - friend gr_agc_cc_sptr gr_make_agc_cc (float rate, float reference, float gain, float max_gain); - gr_agc_cc (float rate, float reference, float gain, float max_gain); + friend gr_agc_cc_sptr gr_make_agc_cc (float rate, float reference, + float gain, float max_gain); + gr_agc_cc (float rate, float reference, + float gain, float max_gain); public: virtual int work (int noutput_items, diff --git a/gnuradio-core/src/lib/general/gr_agc_cc.i b/gnuradio-core/src/lib/general/gr_agc_cc.i index aae327d837..c936f03f00 100644 --- a/gnuradio-core/src/lib/general/gr_agc_cc.i +++ b/gnuradio-core/src/lib/general/gr_agc_cc.i @@ -25,9 +25,11 @@ GR_SWIG_BLOCK_MAGIC(gr,agc_cc) %include <gri_agc_cc.i> gr_agc_cc_sptr -gr_make_agc_cc (float rate = 1e-4, float reference = 1.0, float gain = 1.0, float max_gain = 0.0); +gr_make_agc_cc (float rate = 1e-4, float reference = 1.0, + float gain = 1.0, float max_gain = 0.0); class gr_agc_cc : public gr_sync_block , public gri_agc_cc { - gr_agc_cc (float rate, float reference, float gain, float max_gain); + gr_agc_cc (float rate, float reference, + float gain, float max_gain); }; diff --git a/gnuradio-core/src/lib/general/gr_agc_ff.cc b/gnuradio-core/src/lib/general/gr_agc_ff.cc index 0fa2bc5b0d..581b78c8be 100644 --- a/gnuradio-core/src/lib/general/gr_agc_ff.cc +++ b/gnuradio-core/src/lib/general/gr_agc_ff.cc @@ -26,7 +26,7 @@ #include <gr_agc_ff.h> #include <gr_io_signature.h> -#include <gri_agc.h> +#include <gri_agc_ff.h> gr_agc_ff_sptr gr_make_agc_ff (float rate, float reference, float gain, float max_gain) @@ -38,7 +38,7 @@ gr_agc_ff::gr_agc_ff (float rate, float reference, float gain, float max_gain) : gr_sync_block ("gr_agc_ff", gr_make_io_signature (1, 1, sizeof (float)), gr_make_io_signature (1, 1, sizeof (float))) - , gri_agc (rate, reference, gain, max_gain) + , gri_agc_ff (rate, reference, gain, max_gain) { } diff --git a/gnuradio-core/src/lib/general/gr_agc_ff.h b/gnuradio-core/src/lib/general/gr_agc_ff.h index 8931b5afe9..a12026b62f 100644 --- a/gnuradio-core/src/lib/general/gr_agc_ff.h +++ b/gnuradio-core/src/lib/general/gr_agc_ff.h @@ -24,21 +24,24 @@ #define INCLUDED_GR_AGC_FF_H #include <gr_sync_block.h> -#include <gri_agc.h> +#include <gri_agc_ff.h> class gr_agc_ff; typedef boost::shared_ptr<gr_agc_ff> gr_agc_ff_sptr; gr_agc_ff_sptr -gr_make_agc_ff (float rate = 1e-4, float reference = 1.0, float gain = 1.0, float max_gain = 0.0); +gr_make_agc_ff (float rate = 1e-4, float reference = 1.0, + float gain = 1.0, float max_gain = 0.0); + /*! * \brief high performance Automatic Gain Control class * * Power is approximated by absolute value */ -class gr_agc_ff : public gr_sync_block, public gri_agc +class gr_agc_ff : public gr_sync_block, public gri_agc_ff { - friend gr_agc_ff_sptr gr_make_agc_ff (float rate, float reference, float gain, float max_gain); + friend gr_agc_ff_sptr gr_make_agc_ff (float rate, float reference, + float gain, float max_gain); gr_agc_ff (float rate, float reference, float gain, float max_gain); public: diff --git a/gnuradio-core/src/lib/general/gr_agc_ff.i b/gnuradio-core/src/lib/general/gr_agc_ff.i index d3ba282872..8abea082a5 100644 --- a/gnuradio-core/src/lib/general/gr_agc_ff.i +++ b/gnuradio-core/src/lib/general/gr_agc_ff.i @@ -22,12 +22,13 @@ GR_SWIG_BLOCK_MAGIC(gr,agc_ff) -%include <gri_agc.i> +%include <gri_agc_ff.i> gr_agc_ff_sptr -gr_make_agc_ff (float rate = 1e-4, float reference = 1.0, float gain = 1.0, float max_gain = 0.0); +gr_make_agc_ff (float rate = 1e-4, float reference = 1.0, + float gain = 1.0, float max_gain = 0.0); -class gr_agc_ff : public gr_sync_block , public gri_agc +class gr_agc_ff : public gr_sync_block , public gri_agc_ff { gr_agc_ff (float rate, float reference, float gain, float max_gain); }; diff --git a/gnuradio-core/src/lib/general/gr_clock_recovery_mm_cc.cc b/gnuradio-core/src/lib/general/gr_clock_recovery_mm_cc.cc index 31338e9403..88cd140773 100644 --- a/gnuradio-core/src/lib/general/gr_clock_recovery_mm_cc.cc +++ b/gnuradio-core/src/lib/general/gr_clock_recovery_mm_cc.cc @@ -48,7 +48,7 @@ gr_clock_recovery_mm_cc::gr_clock_recovery_mm_cc (float omega, float gain_omega, float gain_mu, float omega_relative_limit) : gr_block ("clock_recovery_mm_cc", gr_make_io_signature (1, 1, sizeof (gr_complex)), - gr_make_io_signature (1, 1, sizeof (gr_complex))), + gr_make_io_signature (1, 2, sizeof (gr_complex))), d_mu (mu), d_omega(omega), d_gain_omega(gain_omega), d_omega_relative_limit(omega_relative_limit), d_gain_mu(gain_mu), d_last_sample(0), d_interp(new gri_mmse_fir_interpolator_cc()), @@ -119,6 +119,9 @@ gr_clock_recovery_mm_cc::general_work (int noutput_items, { const gr_complex *in = (const gr_complex *) input_items[0]; gr_complex *out = (gr_complex *) output_items[0]; + gr_complex *foptr = (gr_complex *) output_items[1]; + + bool write_foptr = output_items.size() >= 2; int ii = 0; // input index int oo = 0; // output index @@ -165,6 +168,10 @@ gr_clock_recovery_mm_cc::general_work (int noutput_items, printf("%f\t%f\n", d_omega, d_mu); } + // write the error signal to the second output + if (write_foptr) + foptr[oo-1] = gr_complex(d_mu,0); + if (ii < 0) // clamp it. This should only happen with bogus input ii = 0; } diff --git a/gnuradio-core/src/lib/general/gr_costas_loop_cc.cc b/gnuradio-core/src/lib/general/gr_costas_loop_cc.cc index 1c2e4a3ee5..f06be47eba 100644 --- a/gnuradio-core/src/lib/general/gr_costas_loop_cc.cc +++ b/gnuradio-core/src/lib/general/gr_costas_loop_cc.cc @@ -49,7 +49,7 @@ gr_costas_loop_cc::gr_costas_loop_cc (float alpha, float beta, ) throw (std::invalid_argument) : gr_sync_block ("costas_loop_cc", gr_make_io_signature (1, 1, sizeof (gr_complex)), - gr_make_io_signature (1, 1, sizeof (gr_complex))), + gr_make_io_signature (1, 2, sizeof (gr_complex))), d_alpha(alpha), d_beta(beta), d_max_freq(max_freq), d_min_freq(min_freq), d_phase(0), d_freq((max_freq+min_freq)/2), @@ -92,6 +92,9 @@ gr_costas_loop_cc::work (int noutput_items, { const gr_complex *iptr = (gr_complex *) input_items[0]; gr_complex *optr = (gr_complex *) output_items[0]; + gr_complex *foptr = (gr_complex *) output_items[1]; + + bool write_foptr = output_items.size() >= 2; float error; gr_complex nco_out; @@ -101,18 +104,28 @@ gr_costas_loop_cc::work (int noutput_items, optr[i] = iptr[i] * nco_out; error = (*this.*d_phase_detector)(optr[i]); + if (error > 1) + error = 1; + else if (error < -1) + error = -1; d_freq = d_freq + d_beta * error; d_phase = d_phase + d_freq + d_alpha * error; + while(d_phase>M_TWOPI) d_phase -= M_TWOPI; while(d_phase<-M_TWOPI) d_phase += M_TWOPI; - if (d_freq > d_max_freq) + if (d_freq > d_max_freq) d_freq = d_max_freq; else if (d_freq < d_min_freq) d_freq = d_min_freq; + + if (write_foptr){ + foptr[i] = gr_complex(d_freq,0); + //foptr[i] = gr_complex(error, 0); + } } return noutput_items; } diff --git a/gnuradio-core/src/lib/general/gr_costas_loop_cc.h b/gnuradio-core/src/lib/general/gr_costas_loop_cc.h index 46d73b816c..d7d0db67b3 100644 --- a/gnuradio-core/src/lib/general/gr_costas_loop_cc.h +++ b/gnuradio-core/src/lib/general/gr_costas_loop_cc.h @@ -26,6 +26,7 @@ #include <gr_sync_block.h> #include <stdexcept> +#include <fstream> class gr_costas_loop_cc; typedef boost::shared_ptr<gr_costas_loop_cc> gr_costas_loop_cc_sptr; diff --git a/gnuradio-core/src/lib/general/gr_feedforward_agc_cc.cc b/gnuradio-core/src/lib/general/gr_feedforward_agc_cc.cc new file mode 100644 index 0000000000..7d15e1d77f --- /dev/null +++ b/gnuradio-core/src/lib/general/gr_feedforward_agc_cc.cc @@ -0,0 +1,91 @@ +/* -*- c++ -*- */ +/* + * Copyright 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 2, 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. + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <gr_feedforward_agc_cc.h> +#include <gr_io_signature.h> +#include <stdexcept> + +gr_feedforward_agc_cc_sptr +gr_make_feedforward_agc_cc(int nsamples, float reference) +{ + return gr_feedforward_agc_cc_sptr(new gr_feedforward_agc_cc (nsamples, reference)); +} + +gr_feedforward_agc_cc::gr_feedforward_agc_cc (int nsamples, float reference) + : gr_sync_block ("gr_feedforward_agc_cc", + gr_make_io_signature (1, 1, sizeof (gr_complex)), + gr_make_io_signature (1, 1, sizeof (gr_complex))), + d_nsamples(nsamples), d_reference(reference) +{ + if (nsamples < 1) + throw std::invalid_argument("gr_feedforward_agc_cc: nsamples must be >= 1"); + + set_history(nsamples); +} + +gr_feedforward_agc_cc::~gr_feedforward_agc_cc() +{ +} + +inline static float +mag_squared(gr_complex x) +{ + return x.real() * x.real() + x.imag() * x.imag(); +} + +// approximate sqrt(x^2 + y^2) +inline static float +envelope(gr_complex x) +{ + float r_abs = std::fabs(x.real()); + float i_abs = std::fabs(x.imag()); + + if (r_abs > i_abs) + return r_abs + 0.4 * i_abs; + else + return i_abs + 0.4 * r_abs; +} + +int +gr_feedforward_agc_cc::work(int noutput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items) +{ + const gr_complex *in = (const gr_complex *) input_items[0]; + gr_complex *out = (gr_complex *) output_items[0]; + int nsamples = d_nsamples; + float gain; + + for (int i = 0; i < noutput_items; i++){ + //float max_env = 1e-12; // avoid divide by zero + float max_env = 1e-4; // avoid divide by zero, indirectly set max gain + for (int j = 0; j < nsamples; j++) + max_env = std::max(max_env, envelope(in[i+j])); + gain = d_reference / max_env; + out[i] = gain * in[i]; + } + return noutput_items; +} diff --git a/gnuradio-core/src/lib/general/gr_feedforward_agc_cc.h b/gnuradio-core/src/lib/general/gr_feedforward_agc_cc.h new file mode 100644 index 0000000000..ba7c83669f --- /dev/null +++ b/gnuradio-core/src/lib/general/gr_feedforward_agc_cc.h @@ -0,0 +1,55 @@ +/* -*- c++ -*- */ +/* + * Copyright 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 2, 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. + */ + +#ifndef INCLUDED_GR_FEEDFORWARD_AGC_CC_H +#define INCLUDED_GR_FEEDFORWARD_AGC_CC_H + +#include <gr_sync_block.h> + +class gr_feedforward_agc_cc; +typedef boost::shared_ptr<gr_feedforward_agc_cc> gr_feedforward_agc_cc_sptr; + +gr_feedforward_agc_cc_sptr +gr_make_feedforward_agc_cc(int nsamples, float reference = 1.0); + +/*! + * \brief Non-causal AGC which computes required gain based on max absolute value over nsamples + */ +class gr_feedforward_agc_cc : public gr_sync_block +{ + friend gr_feedforward_agc_cc_sptr + gr_make_feedforward_agc_cc(int nsamples, float reference); + + int d_nsamples; + float d_reference; + + gr_feedforward_agc_cc(int nsamples, float reference); + + public: + ~gr_feedforward_agc_cc(); + + int work(int noutput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items); +}; + +#endif /* INCLUDED_GR_FEEDFORWARD_AGC_CC_H */ diff --git a/gnuradio-core/src/lib/general/gr_feedforward_agc_cc.i b/gnuradio-core/src/lib/general/gr_feedforward_agc_cc.i new file mode 100644 index 0000000000..064e72e653 --- /dev/null +++ b/gnuradio-core/src/lib/general/gr_feedforward_agc_cc.i @@ -0,0 +1,34 @@ +/* -*- c++ -*- */ +/* + * Copyright 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 2, 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. + */ + +GR_SWIG_BLOCK_MAGIC(gr,feedforward_agc_cc); + +gr_feedforward_agc_cc_sptr +gr_make_feedforward_agc_cc(int nsamples, float reference = 1.0); + +class gr_feedforward_agc_cc : public gr_sync_block +{ + gr_feedforward_agc_cc(int nsamples, float reference); + + public: + ~gr_feedforward_agc_cc(); +}; diff --git a/gnuradio-core/src/lib/general/gri_agc2_cc.h b/gnuradio-core/src/lib/general/gri_agc2_cc.h new file mode 100644 index 0000000000..a8ca699c5d --- /dev/null +++ b/gnuradio-core/src/lib/general/gri_agc2_cc.h @@ -0,0 +1,91 @@ +/* -*- c++ -*- */ +/* + * Copyright 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 2, 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. + */ + +#ifndef _GRI_AGC2_CC_H_ +#define _GRI_AGC2_CC_H_ + +#include <math.h> + +/*! + * \brief high performance Automatic Gain Control class + * + * For Power the absolute value of the complex number is used. + */ + +class gri_agc2_cc { + + public: + gri_agc2_cc (float attack_rate = 1e-1, float decay_rate = 1e-2, float reference = 1.0, + float gain = 1.0, float max_gain = 0.0) + : _attack_rate(attack_rate), _decay_rate(decay_rate), _reference(reference), + _gain(gain), _max_gain(max_gain) {}; + + float decay_rate () const { return _decay_rate; } + float attack_rate () const { return _attack_rate; } + float reference () const { return _reference; } + float gain () const { return _gain; } + float max_gain() const { return _max_gain; } + + void set_decay_rate (float rate) { _decay_rate = rate; } + void set_attack_rate (float rate) { _attack_rate = rate; } + void set_reference (float reference) { _reference = reference; } + void set_gain (float gain) { _gain = gain; } + void set_max_gain(float max_gain) { _max_gain = max_gain; } + + gr_complex scale (gr_complex input){ + gr_complex output = input * _gain; + + float tmp = -_reference + sqrt(output.real()*output.real() + + output.imag()*output.imag()); + float rate = _decay_rate; + if((tmp) > _gain) + rate = _attack_rate; + _gain -= tmp*rate; + +#if 0 + fprintf(stdout, "rate = %f\ttmp = %f\t gain = %f\n", rate, tmp, _gain); +#endif + + // Not sure about this; will blow up if _gain < 0 (happens when rates are too high), + // but is this the solution? + if (_gain < 0.0) + _gain = 10e-5; + + if (_max_gain > 0.0 && _gain > _max_gain) + _gain = _max_gain; + return output; + } + + void scaleN (gr_complex output[], const gr_complex input[], unsigned n){ + for (unsigned i = 0; i < n; i++) + output[i] = scale (input[i]); + } + + protected: + float _decay_rate; // decay rate for slow changing signals + float _attack_rate; // attack rate for fast changing signals + float _reference; // reference value + float _gain; // current gain + float _max_gain; // max allowable gain +}; + +#endif /* _GRI_AGC2_CC_H_ */ diff --git a/gnuradio-core/src/lib/general/gri_agc2_cc.i b/gnuradio-core/src/lib/general/gri_agc2_cc.i new file mode 100644 index 0000000000..0257e905f2 --- /dev/null +++ b/gnuradio-core/src/lib/general/gri_agc2_cc.i @@ -0,0 +1,42 @@ +/* -*- c++ -*- */ +/* + * Copyright 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 2, 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. + */ + +#include <math.h> + +/*! + * \brief high performance Automatic Gain Control class with attack and decay rates + * + * For Power the absolute value of the complex number is used. + */ + + +class gri_agc2_cc { + + public: + gri_agc2_cc (float attack_rate = 1e-1, float decay_rate = 1e-2, float reference = 1.0, + float gain = 1.0, float max_gain = 0.0); + float decay_rate (); + float attack_rate (); + float reference (); + float gain (); + float max_gain (); + }; diff --git a/gnuradio-core/src/lib/general/gri_agc2_ff.h b/gnuradio-core/src/lib/general/gri_agc2_ff.h new file mode 100644 index 0000000000..b0bff04c38 --- /dev/null +++ b/gnuradio-core/src/lib/general/gri_agc2_ff.h @@ -0,0 +1,89 @@ +/* -*- c++ -*- */ +/* + * Copyright 2002,2006 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 2, 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. + */ + +#ifndef _GRI_AGC2_FF_H_ +#define _GRI_AGC2_FF_H_ + +#include <math.h> + +/*! + * \brief high performance Automatic Gain Control class with attack and decay rate + * + * Power is approximated by absolute value + */ + +class gri_agc2_ff { + + public: + gri_agc2_ff (float attack_rate = 1e-1, float decay_rate = 1e-2, float reference = 1.0, + float gain = 1.0, float max_gain = 0.0) + : _attack_rate(attack_rate), _decay_rate(decay_rate), _reference(reference), + _gain(gain), _max_gain(max_gain) {}; + + float decay_rate () const { return _decay_rate; } + float attack_rate () const { return _attack_rate; } + float reference () const { return _reference; } + float gain () const { return _gain; } + float max_gain () const { return _max_gain; } + + void set_decay_rate (float rate) { _decay_rate = rate; } + void set_attack_rate (float rate) { _attack_rate = rate; } + void set_reference (float reference) { _reference = reference; } + void set_gain (float gain) { _gain = gain; } + void set_max_gain (float max_gain) { _max_gain = max_gain; } + + float scale (float input){ + float output = input * _gain; + + float tmp = (fabsf(output)) - _reference; + float rate = _decay_rate; + if(fabsf(tmp) > _gain) + rate = _attack_rate; + _gain -= tmp*rate; + +#if 0 + fprintf(stdout, "rate = %f\ttmp = %f\t gain = %f\n", rate, tmp, _gain); +#endif + + // Not sure about this + if (_gain < 0.0) + _gain = 10e-5; + + if (_max_gain > 0.0 && _gain > _max_gain) + _gain = _max_gain; + return output; + } + + void scaleN (float output[], const float input[], unsigned n){ + for (unsigned i = 0; i < n; i++) + output[i] = scale (input[i]); + } + + protected: + float _decay_rate; // decay rate for slow changing signals + float _attack_rate; // attack_rate for fast changing signals + float _reference; // reference value + float _gain; // current gain + float _max_gain; // maximum gain +}; + +#endif /* _GRI_AGC2_FF_H_ */ diff --git a/gnuradio-core/src/lib/general/gri_agc2_ff.i b/gnuradio-core/src/lib/general/gri_agc2_ff.i new file mode 100644 index 0000000000..56bb3651db --- /dev/null +++ b/gnuradio-core/src/lib/general/gri_agc2_ff.i @@ -0,0 +1,37 @@ +/* -*- c++ -*- */ +/* + * 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 2, 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. + */ + +#include <math.h> + +/*! + * \brief high performance Automatic Gain Control class + * + * Power is approximated by absolute value + */ + + +class gri_agc2_ff { + + public: + gri_agc2_ff (float attack_rate = 1e-1, float decay_rate = 1e-2, + float reference = 1.0, float gain = 1.0, float max_gain = 0.0); + }; diff --git a/gnuradio-core/src/lib/general/gri_agc_cc.h b/gnuradio-core/src/lib/general/gri_agc_cc.h index f68eec4cfa..5ebd67ccf9 100644 --- a/gnuradio-core/src/lib/general/gri_agc_cc.h +++ b/gnuradio-core/src/lib/general/gri_agc_cc.h @@ -20,8 +20,8 @@ * Boston, MA 02110-1301, USA. */ -#ifndef _GRI_AGC_CC_H_ -#define _GRI_AGC_CC_H_ +#ifndef INCLUDED_GRI_AGC_CC_H +#define INCLUDED_GRI_AGC_CC_H #include <math.h> @@ -34,8 +34,10 @@ class gri_agc_cc { public: - gri_agc_cc (float rate = 1e-4, float reference = 1.0, float gain = 1.0, float max_gain = 0.0) - : _rate(rate), _reference(reference), _gain(gain), _max_gain(max_gain) {}; + gri_agc_cc (float rate = 1e-4, float reference = 1.0, + float gain = 1.0, float max_gain = 0.0) + : _rate(rate), _reference(reference), + _gain(gain), _max_gain(max_gain) {}; float rate () const { return _rate; } float reference () const { return _reference; } @@ -46,11 +48,12 @@ class gri_agc_cc { void set_reference (float reference) { _reference = reference; } void set_gain (float gain) { _gain = gain; } void set_max_gain(float max_gain) { _max_gain = max_gain; } - + gr_complex scale (gr_complex input){ gr_complex output = input * _gain; - _gain += (_reference - sqrt(output.real()*output.real()+output.imag()*output.imag())) * _rate; //use abs or cabs to get approximation by absolute value, - //note that abs is computationally more intensive then norm for a complex number + + _gain += _rate * (_reference - sqrt(output.real()*output.real() + + output.imag()*output.imag())); if (_max_gain > 0.0 && _gain > _max_gain) _gain = _max_gain; return output; @@ -68,4 +71,4 @@ class gri_agc_cc { float _max_gain; // max allowable gain }; -#endif /* _GRI_AGC_CC_H_ */ +#endif /* INCLUDED_GRI_AGC_CC_H */ diff --git a/gnuradio-core/src/lib/general/gri_agc_cc.i b/gnuradio-core/src/lib/general/gri_agc_cc.i index 88473bc5e0..7e109ea5b2 100644 --- a/gnuradio-core/src/lib/general/gri_agc_cc.i +++ b/gnuradio-core/src/lib/general/gri_agc_cc.i @@ -32,7 +32,8 @@ class gri_agc_cc { public: - gri_agc_cc (float rate = 1e-4, float reference = 1.0, float gain = 1.0, float max_gain = 0.0); + gri_agc_cc (float rate = 1e-4, float reference = 1.0, + float gain = 1.0, float max_gain = 0.0); float rate (); float reference (); float gain (); diff --git a/gnuradio-core/src/lib/general/gri_agc.h b/gnuradio-core/src/lib/general/gri_agc_ff.h index aff81c35db..cdf1b23af2 100644 --- a/gnuradio-core/src/lib/general/gri_agc.h +++ b/gnuradio-core/src/lib/general/gri_agc_ff.h @@ -20,8 +20,8 @@ * Boston, MA 02110-1301, USA. */ -#ifndef _GRI_AGC_H_ -#define _GRI_AGC_H_ +#ifndef INCLUDED_GRI_AGC_FF_H +#define INCLUDED_GRI_AGC_FF_H #include <math.h> @@ -31,10 +31,11 @@ * Power is approximated by absolute value */ -class gri_agc { +class gri_agc_ff { public: - gri_agc (float rate = 1e-4, float reference = 1.0, float gain = 1.0, float max_gain = 0.0) + gri_agc_ff (float rate = 1e-4, float reference = 1.0, + float gain = 1.0, float max_gain = 0.0) : _rate(rate), _reference(reference), _gain(gain), _max_gain(max_gain) {}; float rate () const { return _rate; } @@ -67,4 +68,5 @@ class gri_agc { float _max_gain; // maximum gain }; -#endif /* _GRI_AGC_H_ */ +#endif /* INCLUDED_GRI_AGC_FF_H */ + diff --git a/gnuradio-core/src/lib/general/gri_agc.i b/gnuradio-core/src/lib/general/gri_agc_ff.i index 037813883f..20bd6c051c 100644 --- a/gnuradio-core/src/lib/general/gri_agc.i +++ b/gnuradio-core/src/lib/general/gri_agc_ff.i @@ -28,9 +28,9 @@ * Power is approximated by absolute value */ - -class gri_agc { +class gri_agc_ff { public: - gri_agc (float rate = 1e-4, float reference = 1.0, float gain = 1.0, float max_gain = 0.0); - }; + gri_agc_ff (float rate = 1e-4, float reference = 1.0, + float gain = 1.0, float max_gain = 0.0); +}; diff --git a/gnuradio-core/src/python/gnuradio/Makefile.am b/gnuradio-core/src/python/gnuradio/Makefile.am index 05e42a7378..4f8972f09a 100644 --- a/gnuradio-core/src/python/gnuradio/Makefile.am +++ b/gnuradio-core/src/python/gnuradio/Makefile.am @@ -28,6 +28,7 @@ grpython_PYTHON = \ audio.py \ eng_notation.py \ eng_option.py \ + modulation_utils.py \ packet_utils.py \ gr_unittest.py \ optfir.py \ diff --git a/gnuradio-core/src/python/gnuradio/blksimpl/Makefile.am b/gnuradio-core/src/python/gnuradio/blksimpl/Makefile.am index 184aa7a29b..8122bfa6a7 100644 --- a/gnuradio-core/src/python/gnuradio/blksimpl/Makefile.am +++ b/gnuradio-core/src/python/gnuradio/blksimpl/Makefile.am @@ -29,14 +29,16 @@ grblkspythondir = $(grpythondir)/blksimpl grblkspython_PYTHON = \ __init__.py \ am_demod.py \ + dbpsk.py \ + dqpsk.py \ filterbank.py \ fm_demod.py \ fm_emph.py \ - gmsk2.py \ - gmsk2_pkt.py \ + gmsk.py \ nbfm_rx.py \ nbfm_tx.py \ pkt.py \ + psk.py \ rational_resampler.py \ standard_squelch.py \ wfm_rcv.py \ diff --git a/gnuradio-core/src/python/gnuradio/blksimpl/dbpsk.py b/gnuradio-core/src/python/gnuradio/blksimpl/dbpsk.py new file mode 100644 index 0000000000..20b940bf05 --- /dev/null +++ b/gnuradio-core/src/python/gnuradio/blksimpl/dbpsk.py @@ -0,0 +1,370 @@ +# +# 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 2, 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/gmsk2 for examples + +""" +differential BPSK modulation and demodulation. +""" + +from gnuradio import gr, gru, modulation_utils +from math import pi, sqrt +import psk +import cmath +import Numeric +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 = 0.05 +_def_gain_mu = 0.03 +_def_mu = 0.05 +_def_omega_relative_limit = 0.005 + + +# ///////////////////////////////////////////////////////////////////////////// +# DBPSK modulator +# ///////////////////////////////////////////////////////////////////////////// + +class dbpsk_mod(gr.hier_block): + + def __init__(self, fg, + 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 differential BPSK modulation. + + The input is a byte stream (unsigned char) and the + output is the complex modulated signal at baseband. + + @param fg: flow graph + @type fg: flow graph + @param samples_per_symbol: samples per baud >= 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 log: Log modulation data to files? + @type log: bool + """ + + self._fg = fg + self._samples_per_symbol = samples_per_symbol + self._excess_bw = excess_bw + self._gray_code = gray_code + + if not isinstance(self._samples_per_symbol, int) or self._samples_per_symbol < 2: + raise TypeError, ("sbp must be an integer >= 2, is %d" % self._samples_per_symbol) + + ntaps = 11 * self._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(psk.binary_to_gray[arity]) + else: + self.symbol_mapper = gr.map_bb(psk.binary_to_ungray[arity]) + + self.diffenc = gr.diff_encoder_bb(arity) + + self.chunks2symbols = gr.chunks_to_symbols_bc(psk.constellation[arity]) + + # pulse shaping filter + self.rrc_taps = gr.firdes.root_raised_cosine( + self._samples_per_symbol, # gain (samples_per_symbol since we're + # interpolating by samples_per_symbol) + 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) + + # Connect + fg.connect(self.bytes2chunks, self.symbol_mapper, self.diffenc, + self.chunks2symbols, self.rrc_filter) + + if verbose: + self._print_verbage() + + if log: + self._setup_logging() + + # Initialize base class + gr.hier_block.__init__(self, self._fg, self.bytes2chunks, self.rrc_filter) + + def samples_per_symbol(self): + return self._samples_per_symbol + + def bits_per_symbol(self=None): # static method that's also callable on an instance + return 1 + bits_per_symbol = staticmethod(bits_per_symbol) # make it a static method. RTFM + + def add_options(parser): + """ + Adds DBPSK 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]") + parser.add_option("", "--no-gray-code", dest="gray_code", + action="store_false", default=True, + 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(dbpsk_mod.__init__, + ('self', 'fg'), options) + extract_kwargs_from_options=staticmethod(extract_kwargs_from_options) + + + def _print_verbage(self): + 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._fg.connect(self.bytes2chunks, + gr.file_sink(gr.sizeof_char, "bytes2chunks.dat")) + self._fg.connect(self.symbol_mapper, + gr.file_sink(gr.sizeof_char, "graycoder.dat")) + self._fg.connect(self.diffenc, + gr.file_sink(gr.sizeof_char, "diffenc.dat")) + self._fg.connect(self.chunks2symbols, + gr.file_sink(gr.sizeof_gr_complex, "chunks2symbols.dat")) + self._fg.connect(self.rrc_filter, + gr.file_sink(gr.sizeof_gr_complex, "rrc_filter.dat")) + + +# ///////////////////////////////////////////////////////////////////////////// +# DBPSK demodulator +# +# Differentially coherent detection of differentially encoded BPSK +# ///////////////////////////////////////////////////////////////////////////// + +class dbpsk_demod(gr.hier_block): + + def __init__(self, fg, + 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): + """ + Hierarchical block for RRC-filtered differential BPSK demodulation + + The input is the complex modulated signal at baseband. + The output is a stream of bits packed 1 bit per byte (LSB) + + @param fg: flow graph + @type fg: flow graph + @param samples_per_symbol: samples per symbol >= 2 + @type samples_per_symbol: float + @param excess_bw: Root-raised cosine filter excess bandwidth + @type excess_bw: float + @param costas_alpha: loop filter gain + @type costas_alphas: float + @param gain_mu: for M&M block + @type gain_mu: float + @param mu: for M&M block + @type mu: float + @param omega_relative_limit: for M&M block + @type omega_relative_limit: 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 + """ + + self._fg = fg + self._samples_per_symbol = samples_per_symbol + self._excess_bw = excess_bw + self._costas_alpha = costas_alpha + self._gain_mu = gain_mu + self._mu = mu + self._omega_relative_limit = omega_relative_limit + self._gray_code = gray_code + + if samples_per_symbol < 2: + raise TypeError, "samples_per_symbol must be >= 2, is %r" % (samples_per_symbol,) + + arity = pow(2,self.bits_per_symbol()) + + # 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) + + + # Costas loop (carrier tracking) + # FIXME: need to decide how to handle this more generally; do we pull it from higher layer? + costas_order = 2 + beta = .25 * self._costas_alpha * self._costas_alpha + self.costas_loop = gr.costas_loop_cc(self._costas_alpha, beta, 0.002, -0.002, costas_order) + + # RRC data filter + ntaps = 11 * self._samples_per_symbol + self.rrc_taps = gr.firdes.root_raised_cosine( + 1.0, # gain + self._samples_per_symbol, # sampling rate + 1.0, # symbol rate + self._excess_bw, # excess bandwidth (roll-off factor) + ntaps) + + self.rrc_filter=gr.fir_filter_ccf(1, self.rrc_taps) + + # symbol clock recovery + omega = self._samples_per_symbol + gain_omega = .25 * self._gain_mu * self._gain_mu + self.clock_recovery=gr.clock_recovery_mm_cc(omega, gain_omega, + self._mu, self._gain_mu, + self._omega_relative_limit) + + # find closest constellation point + rot = 1 + rotated_const = map(lambda pt: pt * rot, psk.constellation[arity]) + #print "rotated_const =", rotated_const + + self.diffdec = gr.diff_phasor_cc() + #self.diffdec = gr.diff_decoder_bb(arity) + + self.slicer = gr.constellation_decoder_cb(rotated_const, range(arity)) + + if self._gray_code: + self.symbol_mapper = gr.map_bb(psk.gray_to_binary[arity]) + else: + self.symbol_mapper = gr.map_bb(psk.ungray_to_binary[arity]) + + # unpack the k bit vector into a stream of bits + self.unpack = gr.unpack_k_bits_bb(self.bits_per_symbol()) + + if verbose: + self._print_verbage() + + if log: + self._setup_logging() + + # Connect and Initialize base class + self._fg.connect(self.pre_scaler, self.agc, self.costas_loop, + self.rrc_filter, self.clock_recovery, self.diffdec, + self.slicer, self.symbol_mapper, self.unpack) + + gr.hier_block.__init__(self, self._fg, self.pre_scaler, self.unpack) + + 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 1 + 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 "RRC roll-off factor = %.2f" % self._excess_bw + print "Costas Loop alpha = %.5f" % self._costas_alpha + print "M&M symbol sync gain = %.5f" % self._gain_mu + print "M&M symbol sync mu = %.5f" % self._mu + print "M&M omega relative limit = %.5f" % self._omega_relative_limit + + def _setup_logging(self): + print "Modulation logging turned on." + self._fg.connect(self.pre_scaler, + gr.file_sink(gr.sizeof_gr_complex, "prescaler.dat")) + self._fg.connect(self.agc, + gr.file_sink(gr.sizeof_gr_complex, "agc.dat")) + self._fg.connect(self.costas_loop, + gr.file_sink(gr.sizeof_gr_complex, "costas_loop.dat")) + self._fg.connect((self.costas_loop,1), + gr.file_sink(gr.sizeof_gr_complex, "costas_error.dat")) + self._fg.connect(self.rrc_filter, + gr.file_sink(gr.sizeof_gr_complex, "rrc_filter.dat")) + self._fg.connect(self.clock_recovery, + gr.file_sink(gr.sizeof_gr_complex, "clock_recovery.dat")) + self._fg.connect((self.clock_recovery,1), + gr.file_sink(gr.sizeof_gr_complex, "clock_recovery_error.dat")) + self._fg.connect(self.diffdec, + gr.file_sink(gr.sizeof_gr_complex, "diffdec.dat")) + self._fg.connect(self.slicer, + gr.file_sink(gr.sizeof_char, "slicer.dat")) + self._fg.connect(self.gray_decoder, + gr.file_sink(gr.sizeof_char, "gray_decoder.dat")) + self._fg.connect(self.unpack, + gr.file_sink(gr.sizeof_char, "unpack.dat")) + + def add_options(parser): + """ + Adds DBPSK demodulation-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)") + parser.add_option("", "--costas-alpha", type="float", default=None, + 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] (GMSK/PSK)") + parser.add_option("", "--mu", type="float", default=_def_mu, + help="set M&M symbol sync loop mu value [default=%default] (GMSK/PSK)") + parser.add_option("", "--omega-relative-limit", type="float", default=_def_omega_relative_limit, + help="M&M clock recovery omega relative limit [default=%default] (GMSK/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( + dbpsk_demod.__init__, ('self', 'fg'), options) + extract_kwargs_from_options=staticmethod(extract_kwargs_from_options) + +# +# Add these to the mod/demod registry +# +modulation_utils.add_type_1_mod('dbpsk', dbpsk_mod) +modulation_utils.add_type_1_demod('dbpsk', dbpsk_demod) diff --git a/gnuradio-core/src/python/gnuradio/blksimpl/dqpsk.py b/gnuradio-core/src/python/gnuradio/blksimpl/dqpsk.py new file mode 100644 index 0000000000..3b60f2242e --- /dev/null +++ b/gnuradio-core/src/python/gnuradio/blksimpl/dqpsk.py @@ -0,0 +1,370 @@ +# +# 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 2, 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/gmsk2 for examples + +""" +differential QPSK modulation and demodulation. +""" + +from gnuradio import gr, gru, modulation_utils +from math import pi, sqrt +import psk +import cmath +import Numeric +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 = 0.10 +_def_gain_mu = 0.03 +_def_mu = 0.05 +_def_omega_relative_limit = 0.005 + + +# ///////////////////////////////////////////////////////////////////////////// +# DQPSK modulator +# ///////////////////////////////////////////////////////////////////////////// + +class dqpsk_mod(gr.hier_block): + + def __init__(self, fg, + 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 fg: flow graph + @type fg: flow graph + @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 + """ + + self._fg = fg + 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(psk.binary_to_gray[arity]) + else: + self.symbol_mapper = gr.map_bb(psk.binary_to_ungray[arity]) + + self.diffenc = gr.diff_encoder_bb(arity) + + rot = .707 + .707j + rotated_const = map(lambda pt: pt * rot, psk.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 & Initialize base class + self._fg.connect(self.bytes2chunks, self.symbol_mapper, self.diffenc, + self.chunks2symbols, self.rrc_filter) + gr.hier_block.__init__(self, self._fg, self.bytes2chunks, self.rrc_filter) + + 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 2 + 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._fg.connect(self.bytes2chunks, + gr.file_sink(gr.sizeof_char, "bytes2chunks.dat")) + self._fg.connect(self.symbol_mapper, + gr.file_sink(gr.sizeof_char, "graycoder.dat")) + self._fg.connect(self.diffenc, + gr.file_sink(gr.sizeof_char, "diffenc.dat")) + self._fg.connect(self.chunks2symbols, + gr.file_sink(gr.sizeof_gr_complex, "chunks2symbols.dat")) + self._fg.connect(self.rrc_filter, + gr.file_sink(gr.sizeof_gr_complex, "rrc_filter.dat")) + + def add_options(parser): + """ + Adds QPSK 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(dqpsk_mod.__init__, + ('self', 'fg'), options) + extract_kwargs_from_options=staticmethod(extract_kwargs_from_options) + + +# ///////////////////////////////////////////////////////////////////////////// +# DQPSK demodulator +# +# Differentially coherent detection of differentially encoded qpsk +# ///////////////////////////////////////////////////////////////////////////// + +class dqpsk_demod(gr.hier_block): + + def __init__(self, fg, + 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): + """ + Hierarchical block for RRC-filtered DQPSK demodulation + + The input is the complex modulated signal at baseband. + The output is a stream of bits packed 1 bit per byte (LSB) + + @param fg: flow graph + @type fg: flow graph + @param samples_per_symbol: samples per symbol >= 2 + @type samples_per_symbol: float + @param excess_bw: Root-raised cosine filter excess bandwidth + @type excess_bw: float + @param costas_alpha: loop filter gain + @type costas_alphas: float + @param gain_mu: for M&M block + @type gain_mu: float + @param mu: for M&M block + @type mu: float + @param omega_relative_limit: for M&M block + @type omega_relative_limit: 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 + """ + + self._fg = fg + self._samples_per_symbol = samples_per_symbol + self._excess_bw = excess_bw + self._costas_alpha = costas_alpha + self._gain_mu = gain_mu + self._mu = mu + self._omega_relative_limit = omega_relative_limit + self._gray_code = gray_code + + if samples_per_symbol < 2: + raise TypeError, "sbp must be >= 2, is %d" % samples_per_symbol + + arity = pow(2,self.bits_per_symbol()) + + # 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) + + # Costas loop (carrier tracking) + # FIXME: need to decide how to handle this more generally; do we pull it from higher layer? + costas_order = 4 + beta = .25 * self._costas_alpha * self._costas_alpha + #self.costas_loop = gr.costas_loop_cc(self._costas_alpha, beta, 0.1, -0.1, costas_order) + self.costas_loop = gr.costas_loop_cc(self._costas_alpha, beta, 0.002, -0.002, costas_order) + + # RRC data filter + ntaps = 11 * samples_per_symbol + self.rrc_taps = gr.firdes.root_raised_cosine( + self._samples_per_symbol, # gain + self._samples_per_symbol, # sampling rate + 1.0, # symbol rate + self._excess_bw, # excess bandwidth (roll-off factor) + ntaps) + + self.rrc_filter=gr.fir_filter_ccf(1, self.rrc_taps) + + # symbol clock recovery + omega = self._samples_per_symbol + gain_omega = .25 * self._gain_mu * self._gain_mu + self.clock_recovery=gr.clock_recovery_mm_cc(omega, gain_omega, + self._mu, self._gain_mu, + self._omega_relative_limit) + + self.diffdec = gr.diff_phasor_cc() + #self.diffdec = gr.diff_decoder_bb(arity) + + # find closest constellation point + rot = 1 + #rot = .707 + .707j + rotated_const = map(lambda pt: pt * rot, psk.constellation[arity]) + #print "rotated_const = %s" % rotated_const + + self.slicer = gr.constellation_decoder_cb(rotated_const, range(arity)) + + if self._gray_code: + self.symbol_mapper = gr.map_bb(psk.gray_to_binary[arity]) + else: + self.symbol_mapper = gr.map_bb(psk.ungray_to_binary[arity]) + + + # unpack the k bit vector into a stream of bits + self.unpack = gr.unpack_k_bits_bb(self.bits_per_symbol()) + + if verbose: + self._print_verbage() + + if log: + self._setup_logging() + + # Connect & Initialize base class + self._fg.connect(self.pre_scaler, self.agc, self.costas_loop, + self.rrc_filter, self.clock_recovery, + self.diffdec, self.slicer, self.symbol_mapper, + self.unpack) + gr.hier_block.__init__(self, self._fg, self.pre_scaler, self.unpack) + + 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 2 + 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 "RRC roll-off factor = %.2f" % self._excess_bw + print "Costas Loop alpha = %.5f" % self._costas_alpha + print "M&M symbol sync gain = %.5f" % self._gain_mu + print "M&M symbol sync mu = %.5f" % self._mu + print "M&M omega relative limit = %.5f" % self._omega_relative_limit + + + def _setup_logging(self): + print "Modulation logging turned on." + self._fg.connect(self.pre_scaler, + gr.file_sink(gr.sizeof_gr_complex, "prescaler.dat")) + self._fg.connect(self.agc, + gr.file_sink(gr.sizeof_gr_complex, "agc.dat")) + self._fg.connect(self.costas_loop, + gr.file_sink(gr.sizeof_gr_complex, "costas_loop.dat")) + self._fg.connect((self.costas_loop,1), + gr.file_sink(gr.sizeof_gr_complex, "costas_error.dat")) + self._fg.connect(self.rrc_filter, + gr.file_sink(gr.sizeof_gr_complex, "rrc_filter.dat")) + self._fg.connect(self.clock_recovery, + gr.file_sink(gr.sizeof_gr_complex, "clock_recovery.dat")) + self._fg.connect((self.clock_recovery,1), + gr.file_sink(gr.sizeof_gr_complex, "clock_recovery_error.dat")) + self._fg.connect(self.diffdec, + gr.file_sink(gr.sizeof_gr_complex, "diffdec.dat")) + self._fg.connect(self.slicer, + gr.file_sink(gr.sizeof_char, "slicer.dat")) + self._fg.connect(self.symbol_mapper, + gr.file_sink(gr.sizeof_char, "gray_decoder.dat")) + self._fg.connect(self.unpack, + gr.file_sink(gr.sizeof_char, "unpack.dat")) + + def add_options(parser): + """ + Adds 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)") + parser.add_option("", "--costas-alpha", type="float", default=None, + 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)") + parser.add_option("", "--mu", type="float", default=_def_mu, + help="set M&M symbol sync loop mu value [default=%default] (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( + dqpsk_demod.__init__, ('self', 'fg'), options) + extract_kwargs_from_options=staticmethod(extract_kwargs_from_options) + + +# +# Add these to the mod/demod registry +# +modulation_utils.add_type_1_mod('dqpsk', dqpsk_mod) +modulation_utils.add_type_1_demod('dqpsk', dqpsk_demod) diff --git a/gnuradio-core/src/python/gnuradio/blksimpl/gmsk.py b/gnuradio-core/src/python/gnuradio/blksimpl/gmsk.py new file mode 100644 index 0000000000..098aa74bb5 --- /dev/null +++ b/gnuradio-core/src/python/gnuradio/blksimpl/gmsk.py @@ -0,0 +1,289 @@ +# +# GMSK modulation and demodulation. +# +# +# 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 2, 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/gmsk2 for examples + +from gnuradio import gr +from gnuradio import modulation_utils +from math import pi +import Numeric +from pprint import pprint +import inspect + +# default values (used in __init__ and add_options) +_def_samples_per_symbol = 2 +_def_bt = 0.35 +_def_verbose = False +_def_log = False + +_def_gain_mu = 0.05 +_def_mu = 0.5 +_def_freq_error = 0.0 +_def_omega_relative_limit = 0.005 + + +# ///////////////////////////////////////////////////////////////////////////// +# GMSK modulator +# ///////////////////////////////////////////////////////////////////////////// + +class gmsk_mod(gr.hier_block): + + def __init__(self, fg, + samples_per_symbol=_def_samples_per_symbol, + bt=_def_bt, + verbose=_def_verbose, + log=_def_log): + """ + Hierarchical block for Gaussian Minimum Shift Key (GMSK) + modulation. + + The input is a byte stream (unsigned char) and the + output is the complex modulated signal at baseband. + + @param fg: flow graph + @type fg: flow graph + @param samples_per_symbol: samples per baud >= 2 + @type samples_per_symbol: integer + @param bt: Gaussian filter bandwidth * symbol time + @type bt: float + @param verbose: Print information about modulator? + @type verbose: bool + @param debug: Print modualtion data to files? + @type debug: bool + """ + + self._fg = fg + self._samples_per_symbol = samples_per_symbol + self._bt = bt + + 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,)) + + ntaps = 4 * samples_per_symbol # up to 3 bits in filter at once + sensitivity = (pi / 2) / samples_per_symbol # phase change per bit = pi / 2 + + # Turn it into NRZ data. + self.nrz = gr.bytes_to_syms() + + # Form Gaussian filter + # Generate Gaussian response (Needs to be convolved with window below). + self.gaussian_taps = gr.firdes.gaussian( + 1, # gain + samples_per_symbol, # symbol_rate + bt, # bandwidth * symbol time + ntaps # number of taps + ) + + self.sqwave = (1,) * samples_per_symbol # rectangular window + self.taps = Numeric.convolve(Numeric.array(self.gaussian_taps),Numeric.array(self.sqwave)) + self.gaussian_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 & Initialize base class + self._fg.connect(self.nrz, self.gaussian_filter, self.fmmod) + gr.hier_block.__init__(self, self._fg, self.nrz, self.fmmod) + + 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 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 "Gaussian filter bt = %.2f" % self._bt + + + def _setup_logging(self): + print "Modulation logging turned on." + self._fg.connect(self.nrz, + gr.file_sink(gr.sizeof_float, "nrz.dat")) + self._fg.connect(self.gaussian_filter, + gr.file_sink(gr.sizeof_float, "gaussian_filter.dat")) + self._fg.connect(self.fmmod, + gr.file_sink(gr.sizeof_gr_complex, "fmmod.dat")) + + + def add_options(parser): + """ + Adds GMSK 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(gmsk_mod.__init__, + ('self', 'fg'), options) + extract_kwargs_from_options=staticmethod(extract_kwargs_from_options) + + + +# ///////////////////////////////////////////////////////////////////////////// +# GMSK demodulator +# ///////////////////////////////////////////////////////////////////////////// + +class gmsk_demod(gr.hier_block): + + def __init__(self, fg, + samples_per_symbol=_def_samples_per_symbol, + gain_mu=_def_gain_mu, + mu=_def_mu, + omega_relative_limit=_def_omega_relative_limit, + freq_error=_def_freq_error, + verbose=_def_verbose, + log=_def_log): + """ + Hierarchical block for Gaussian Minimum Shift Key (GMSK) + demodulation. + + The input is the complex modulated signal at baseband. + The output is a stream of bits packed 1 bit per byte (the LSB) + + @param fg: flow graph + @type fg: flow graph + @param samples_per_symbol: samples per baud + @type samples_per_symbol: integer + @param verbose: Print information about modulator? + @type verbose: bool + @param log: Print modualtion data to files? + @type log: bool + + Clock recovery parameters. These all have reasonble defaults. + + @param gain_mu: controls rate of mu adjustment + @type gain_mu: float + @param mu: fractional delay [0.0, 1.0] + @type mu: float + @param omega_relative_limit: sets max variation in omega + @type omega_relative_limit: float, typically 0.000200 (200 ppm) + @param freq_error: bit rate error as a fraction + @param float + """ + + self._fg = fg + self._samples_per_symbol = samples_per_symbol + self._gain_mu = gain_mu + self._mu = mu + self._omega_relative_limit = omega_relative_limit + self._freq_error = freq_error + + if samples_per_symbol < 2: + raise TypeError, "samples_per_symbol >= 2, is %f" % samples_per_symbol + + self._omega = samples_per_symbol*(1+self._freq_error) + + self._gain_omega = .25 * self._gain_mu * self._gain_mu # critically damped + + # Demodulate FM + sensitivity = (pi / 2) / samples_per_symbol + self.fmdemod = gr.quadrature_demod_cf(1.0 / sensitivity) + + # the clock recovery block tracks the symbol clock and resamples as needed. + # the output of the block is a stream of soft symbols (float) + self.clock_recovery = gr.clock_recovery_mm_ff(self._omega, self._gain_omega, + self._mu, self._gain_mu, + self._omega_relative_limit) + + # slice the floats at 0, outputting 1 bit (the LSB of the output byte) per sample + self.slicer = gr.binary_slicer_fb() + + if verbose: + self._print_verbage() + + if log: + self._setup_logging() + + # Connect & Initialize base class + self._fg.connect(self.fmdemod, self.clock_recovery, self.slicer) + gr.hier_block.__init__(self, self._fg, self.fmdemod, self.slicer) + + 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 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 + print "M&M clock recovery gain mu = %f" % self._gain_mu + print "M&M clock recovery mu = %f" % self._mu + print "M&M clock recovery omega rel. limit = %f" % self._omega_relative_limit + print "frequency error = %f" % self._freq_error + + + def _setup_logging(self): + print "Demodulation logging turned on." + self._fg.connect(self.fmdemod, + gr.file_sink(gr.sizeof_float, "fmdemod.dat")) + self._fg.connect(self.clock_recovery, + gr.file_sink(gr.sizeof_float, "clock_recovery.dat")) + self._fg.connect(self.slicer, + gr.file_sink(gr.sizeof_char, "slicer.dat")) + + def add_options(parser): + """ + Adds GMSK demodulation-specific options to the standard parser + """ + parser.add_option("", "--gain-mu", type="float", default=_def_gain_mu, + help="M&M clock recovery gain mu [default=%default] (GMSK/PSK)") + parser.add_option("", "--mu", type="float", default=_def_mu, + help="M&M clock recovery mu [default=%default] (GMSK/PSK)") + parser.add_option("", "--omega-relative-limit", type="float", default=_def_omega_relative_limit, + help="M&M clock recovery omega relative limit [default=%default] (GMSK/PSK)") + parser.add_option("", "--freq-error", type="float", default=_def_freq_error, + help="M&M clock recovery frequency error [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(gmsk_demod.__init__, + ('self', 'fg'), options) + extract_kwargs_from_options=staticmethod(extract_kwargs_from_options) + + +# +# Add these to the mod/demod registry +# +modulation_utils.add_type_1_mod('gmsk', gmsk_mod) +modulation_utils.add_type_1_demod('gmsk', gmsk_demod) diff --git a/gnuradio-core/src/python/gnuradio/blksimpl/gmsk2.py b/gnuradio-core/src/python/gnuradio/blksimpl/gmsk2.py deleted file mode 100644 index 4fc033977b..0000000000 --- a/gnuradio-core/src/python/gnuradio/blksimpl/gmsk2.py +++ /dev/null @@ -1,159 +0,0 @@ -# -# GMSK modulation and demodulation. -# -# -# 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 2, 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/gmsk2 for examples - -from gnuradio import gr -from math import pi -import Numeric - -# ///////////////////////////////////////////////////////////////////////////// -# GMSK mod/demod with steams of bytes as data i/o -# ///////////////////////////////////////////////////////////////////////////// - -class gmsk2_mod(gr.hier_block): - - def __init__(self, fg, spb = 2, bt = 0.3): - """ - Hierarchical block for Gaussian Minimum Shift Key (GMSK) - modulation. - - The input is a byte stream (unsigned char) and the - output is the complex modulated signal at baseband. - - @param fg: flow graph - @type fg: flow graph - @param spb: samples per baud >= 2 - @type spb: integer - @param bt: Gaussian filter bandwidth * symbol time - @type bt: float - """ - if not isinstance(spb, int) or spb < 2: - raise TypeError, "sbp must be an integer >= 2" - self.spb = spb - - ntaps = 4 * spb # up to 3 bits in filter at once - sensitivity = (pi / 2) / spb # phase change per bit = pi / 2 - - # Turn it into NRZ data. - self.nrz = gr.bytes_to_syms() - - # Form Gaussian filter - - # Generate Gaussian response (Needs to be convolved with window below). - self.gaussian_taps = gr.firdes.gaussian( - 1, # gain - spb, # symbol_rate - bt, # bandwidth * symbol time - ntaps # number of taps - ) - - self.sqwave = (1,) * spb # rectangular window - self.taps = Numeric.convolve(Numeric.array(self.gaussian_taps),Numeric.array(self.sqwave)) - self.gaussian_filter = gr.interp_fir_filter_fff(spb, self.taps) - - # FM modulation - self.fmmod = gr.frequency_modulator_fc(sensitivity) - - # Connect - fg.connect(self.nrz, self.gaussian_filter, self.fmmod) - - # Initialize base class - gr.hier_block.__init__(self, fg, self.nrz, self.fmmod) - - def samples_per_baud(self): - return self.spb - - def bits_per_baud(self=None): # staticmethod that's also callable on an instance - return 1 - bits_per_baud = staticmethod(bits_per_baud) # make it a static method. RTFM - - -class gmsk2_demod(gr.hier_block): - - def __init__(self, fg, spb=2, omega=None, gain_mu=0.03, mu=0.5, - omega_relative_limit=0.000200, freq_error=0.0): - """ - Hierarchical block for Gaussian Minimum Shift Key (GMSK) - demodulation. - - The input is the complex modulated signal at baseband. - The output is a stream of symbols ready to be sliced at zero. - - @param fg: flow graph - @type fg: flow graph - @param spb: samples per baud - @type spb: integer - - Clock recovery parameters. These all have reasonble defaults. - - @param omega: nominal relative freq (defaults to spb) - @type omega: float - @param gain_mu: controls rate of mu adjustment - @type gain_mu: float - @param mu: fractional delay [0.0, 1.0] - @type mu: float - @param omega_relative_limit: sets max variation in omega - @type omega_relative_limit: float, typically 0.000200 (200 ppm) - @param freq_error: bit rate error as a fraction - @param float - """ - if spb < 2: - raise TypeError, "sbp >= 2" - self.spb = spb - - if omega is None: - omega = spb*(1+freq_error) - - gain_omega = .25*gain_mu*gain_mu # critically damped - - # Automatic gain control - self.preamp = gr.multiply_const_cc(10e-5) - self.agc = gr.agc_cc(1e-3, 1, 1, 1000) - - # Demodulate FM - sensitivity = (pi / 2) / spb - self.fmdemod = gr.quadrature_demod_cf(1.0 / sensitivity) - - alpha = 0.0008 - - # the clock recovery block tracks the symbol clock and resamples as needed. - # the output of the block is a stream of soft symbols (float) - self.clock_recovery = gr.clock_recovery_mm_ff(omega, gain_omega, mu, gain_mu, - omega_relative_limit) - - # slice the floats at 0, outputting 1 bit (the LSB of the output byte) per sample - self.slicer = gr.binary_slicer_fb() - - fg.connect(self.preamp, self.agc, self.fmdemod, self.clock_recovery, self.slicer) - - # Initialize base class - gr.hier_block.__init__(self, fg, self.preamp, self.slicer) - - def samples_per_baud(self): - return self.spb - - def bits_per_baud(self=None): # staticmethod that's also callable on an instance - return 1 - bits_per_baud = staticmethod(bits_per_baud) # make it a static method. RTFM diff --git a/gnuradio-core/src/python/gnuradio/blksimpl/gmsk2_pkt.py b/gnuradio-core/src/python/gnuradio/blksimpl/gmsk2_pkt.py deleted file mode 100644 index 672dbbd698..0000000000 --- a/gnuradio-core/src/python/gnuradio/blksimpl/gmsk2_pkt.py +++ /dev/null @@ -1,174 +0,0 @@ -# -# 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 2, 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 -import Numeric - -from gnuradio import gr, packet_utils -import gnuradio.gr.gr_threading as _threading -import gmsk2 - - -def _deprecation_warning(old_name, new_name): - print '#' - print '# Warning: %s is deprecated and will be removed soon.' % (old_name,) - print '# Please use the modulation independent block, %s.' % (new_name,) - print "#" - - -# ///////////////////////////////////////////////////////////////////////////// -# GMSK mod/demod with packets as i/o -# ///////////////////////////////////////////////////////////////////////////// - -class gmsk2_mod_pkts(gr.hier_block): - """ - GSM modulator that is a GNU Radio source. - - Send packets by calling send_pkt - """ - def __init__(self, fg, access_code=None, msgq_limit=2, pad_for_usrp=True, *args, **kwargs): - """ - Hierarchical block for Gaussian Minimum Shift Key (GMSK) modulation. - - 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 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 - - See gmsk_mod for remaining parameters - """ - _deprecation_warning('gmsk2_mod_pkts', 'mod_pkts') - - self.pad_for_usrp = pad_for_usrp - if access_code is None: - access_code = packet_utils.default_access_code - if not packet_utils.is_1_0_string(access_code): - raise ValueError, "Invalid access_code %r. Must be string of 1's and 0's" % (access_code,) - self._access_code = access_code - - # accepts messages from the outside world - self.pkt_input = gr.message_source(gr.sizeof_char, msgq_limit) - self.gmsk_mod = gmsk2.gmsk2_mod(fg, *args, **kwargs) - fg.connect(self.pkt_input, self.gmsk_mod) - gr.hier_block.__init__(self, fg, None, self.gmsk_mod) - - 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 = packet_utils.make_packet(payload, - self.gmsk_mod.samples_per_baud(), - self.gmsk_mod.bits_per_baud(), - self._access_code, - self.pad_for_usrp) - #print "pkt =", string_to_hex_list(pkt) - msg = gr.message_from_string(pkt) - self.pkt_input.msgq().insert_tail(msg) - - - -class gmsk2_demod_pkts(gr.hier_block): - """ - GSM demodulator that is a GNU Radio sink. - - The input is complex baseband. When packets are demodulated, they are passed to the - app via the callback. - """ - - def __init__(self, fg, access_code=None, callback=None, threshold=-1, *args, **kwargs): - """ - Hierarchical block for Gaussian Minimum Shift Key (GMSK) - demodulation. - - 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 access_code: AKA sync vector - @type access_code: string of 1's and 0's - @param callback: function of two args: ok, payload - @type callback: ok: bool; payload: string - @param threshold: detect access_code with up to threshold bits wrong (-1 -> use default) - @type threshold: int - - See gmsk_demod for remaining parameters. - """ - - _deprecation_warning('gmsk2_demod_pkts', 'demod_pkts') - - if access_code is None: - access_code = packet_utils.default_access_code - if not packet_utils.is_1_0_string(access_code): - raise ValueError, "Invalid access_code %r. Must be string of 1's and 0's" % (access_code,) - self._access_code = access_code - - if threshold == -1: - threshold = 12 # FIXME raise exception - - self._rcvd_pktq = gr.msg_queue() # holds packets from the PHY - self.gmsk_demod = gmsk2.gmsk2_demod(fg, *args, **kwargs) - self.correlator = gr.correlate_access_code_bb(access_code, threshold) - - self.framer_sink = gr.framer_sink_1(self._rcvd_pktq) - fg.connect(self.gmsk_demod, self.correlator, self.framer_sink) - - gr.hier_block.__init__(self, fg, self.gmsk_demod, None) - self._watcher = _queue_watcher_thread(self._rcvd_pktq, callback) - - def carrier_sensed(self): - """ - Return True if we detect carrier. - """ - return False # FIXME - - -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 stop(self): - # self.keep_running = False - - def run(self): - while self.keep_running: - msg = self.rcvd_pktq.delete_head() - ok, payload = packet_utils.unmake_packet(msg.to_string()) - if self.callback: - self.callback(ok, payload) diff --git a/gnuradio-core/src/python/gnuradio/blksimpl/pkt.py b/gnuradio-core/src/python/gnuradio/blksimpl/pkt.py index 05e22c90e5..a1ece893df 100644 --- a/gnuradio-core/src/python/gnuradio/blksimpl/pkt.py +++ b/gnuradio-core/src/python/gnuradio/blksimpl/pkt.py @@ -81,8 +81,8 @@ class mod_pkts(gr.hier_block): else: # print "original_payload =", string_to_hex_list(payload) pkt = packet_utils.make_packet(payload, - self._modulator.samples_per_baud(), - self._modulator.bits_per_baud(), + self._modulator.samples_per_symbol(), + self._modulator.bits_per_symbol(), self._access_code, self._pad_for_usrp) #print "pkt =", string_to_hex_list(pkt) diff --git a/gnuradio-core/src/python/gnuradio/blksimpl/psk.py b/gnuradio-core/src/python/gnuradio/blksimpl/psk.py new file mode 100644 index 0000000000..fdb6c9e693 --- /dev/null +++ b/gnuradio-core/src/python/gnuradio/blksimpl/psk.py @@ -0,0 +1,67 @@ +# +# 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 2, 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 cmath + +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 + 4 : make_constellation(4), # QPSK + 8 : make_constellation(8) # 8PSK + } + +# ----------------------- +# Do Gray code +# ----------------------- +# binary to gray coding +binary_to_gray = { + 2 : (0, 1), + 4 : (0, 1, 3, 2), + 8 : (0, 1, 3, 2, 7, 6, 4, 5) + } + +# gray to binary +gray_to_binary = { + 2 : (0, 1), + 4 : (0, 1, 3, 2), + 8 : (0, 1, 3, 2, 6, 7, 5, 4) + } + +# ----------------------- +# Don't Gray code +# ----------------------- +# identity mapping +binary_to_ungray = { + 2 : (0, 1), + 4 : (0, 1, 2, 3), + 8 : (0, 1, 2, 3, 4, 5, 6, 7) + } + +# identity mapping +ungray_to_binary = { + 2 : (0, 1), + 4 : (0, 1, 2, 3), + 8 : (0, 1, 2, 3, 4, 5, 6, 7) + } diff --git a/gnuradio-core/src/python/gnuradio/gr/Makefile.am b/gnuradio-core/src/python/gnuradio/gr/Makefile.am index 538f27172f..f562cd7177 100644 --- a/gnuradio-core/src/python/gnuradio/gr/Makefile.am +++ b/gnuradio-core/src/python/gnuradio/gr/Makefile.am @@ -44,6 +44,7 @@ grgrpython_PYTHON = \ noinst_PYTHON = \ qa_add_and_friends.py \ + qa_agc.py \ qa_basic_flow_graph.py \ qa_complex_to_xxx.py \ qa_correlate_access_code.py \ diff --git a/gnuradio-core/src/python/gnuradio/gr/qa_agc.py b/gnuradio-core/src/python/gnuradio/gr/qa_agc.py new file mode 100755 index 0000000000..01159173cc --- /dev/null +++ b/gnuradio-core/src/python/gnuradio/gr/qa_agc.py @@ -0,0 +1,433 @@ +#!/usr/bin/env python +# +# Copyright 2004 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 2, 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, gr_unittest +import math + +test_output = False + +class test_sig_source (gr_unittest.TestCase): + + def setUp (self): + self.fg = gr.flow_graph () + + def tearDown (self): + self.fg = None + + + def test_001(self): + ''' Test the complex AGC loop (single rate input) ''' + fg = self.fg + + expected_result = ( + (100.000244140625+7.2191943445432116e-07j), + (72.892257690429688+52.959323883056641j), + (25.089065551757812+77.216217041015625j), + (-22.611061096191406+69.589706420898438j), + (-53.357715606689453+38.766635894775391j), + (-59.458671569824219+3.4792964243024471e-07j), + (-43.373462677001953-31.512666702270508j), + (-14.94139289855957-45.984889984130859j), + (13.478158950805664-41.48150634765625j), + (31.838506698608398-23.132022857666016j), + (35.519271850585938-3.1176801940091536e-07j), + (25.942903518676758+18.848621368408203j), + (8.9492912292480469+27.5430908203125j), + (-8.0852642059326172+24.883890151977539j), + (-19.131628036499023+13.899936676025391j), + (-21.383295059204102+3.1281737733479531e-07j), + (-15.650330543518066-11.370632171630859j), + (-5.4110145568847656-16.65339469909668j), + (4.9008159637451172-15.083160400390625j), + (11.628337860107422-8.4484796524047852j), + (13.036135673522949-2.288476110834381e-07j), + (9.5726661682128906+6.954948902130127j), + (3.3216962814331055+10.223132133483887j), + (-3.0204284191131592+9.2959251403808594j), + (-7.1977195739746094+5.2294478416442871j), + (-8.1072216033935547+1.8976157889483147e-07j), + (-5.9838657379150391-4.3475332260131836j), + (-2.0879747867584229-6.4261269569396973j), + (1.9100792407989502-5.8786196708679199j), + (4.5814824104309082-3.3286411762237549j), + (5.1967458724975586-1.3684227440080576e-07j), + (3.8647139072418213+2.8078789710998535j), + (1.3594740629196167+4.1840314865112305j), + (-1.2544282674789429+3.8607344627380371j), + (-3.0366206169128418+2.2062335014343262j), + (-3.4781389236450195+1.1194014604143376e-07j), + (-2.6133756637573242-1.8987287282943726j), + (-0.9293016791343689-2.8600969314575195j), + (0.86727333068847656-2.6691930294036865j), + (2.1243946552276611-1.5434627532958984j), + (2.4633183479309082-8.6486437567145913e-08j), + (1.8744727373123169+1.3618841171264648j), + (0.67528903484344482+2.0783262252807617j), + (-0.63866174221038818+1.965599536895752j), + (-1.5857341289520264+1.152103066444397j), + (-1.8640764951705933+7.6355092915036948e-08j), + (-1.4381576776504517-1.0448826551437378j), + (-0.52529704570770264-1.6166983842849731j), + (0.50366902351379395-1.5501341819763184j), + (1.26766037940979-0.92100900411605835j)) + + sampling_freq = 100 + src1 = gr.sig_source_c (sampling_freq, gr.GR_SIN_WAVE, + sampling_freq * 0.10, 100.0) + dst1 = gr.vector_sink_c () + head = gr.head (gr.sizeof_gr_complex, int (5*sampling_freq * 0.10)) + + agc = gr.agc_cc(1e-3, 1, 1, 1000) + + fg.connect (src1, head) + fg.connect (head, agc) + fg.connect (agc, dst1) + + if test_output == True: + fg.connect (agc, gr.file_sink(gr.sizeof_gr_complex, "test_agc_cc.dat")) + + fg.run () + dst_data = dst1.data () + self.assertComplexTuplesAlmostEqual (expected_result, dst_data, 4) + + def test_002(self): + ''' Test the floating point AGC loop (single rate input) ''' + fg = self.fg + + expected_result = ( + 7.2191943445432116e-07, + 58.837181091308594, + 89.700050354003906, + 81.264183044433594, + 45.506141662597656, + 4.269894304798072e-07, + -42.948936462402344, + -65.50335693359375, + -59.368724822998047, + -33.261005401611328, + -4.683740257860336e-07, + 31.423542022705078, + 47.950984954833984, + 43.485683441162109, + 24.378345489501953, + 5.7254135299444897e-07, + -23.062990188598633, + -35.218441009521484, + -31.964075088500977, + -17.934831619262695, + -5.0591745548445033e-07, + 16.998210906982422, + 25.982204437255859, + 23.606258392333984, + 13.260685920715332, + 4.9936483037527069e-07, + -12.59880542755127, + -19.28221321105957, + -17.54347038269043, + -9.8700437545776367, + -4.188150626305287e-07, + 9.4074573516845703, + 14.422011375427246, + 13.145503044128418, + 7.41046142578125, + 3.8512698097292741e-07, + -7.0924453735351562, + -10.896408081054688, + -9.9552040100097656, + -5.6262712478637695, + -3.1982864356905338e-07, + 5.4131259918212891, + 8.3389215469360352, + 7.6409502029418945, + 4.3320145606994629, + 2.882407841298118e-07, + -4.194943904876709, + -6.4837145805358887, + -5.9621825218200684, + -3.3931560516357422) + + sampling_freq = 100 + src1 = gr.sig_source_f (sampling_freq, gr.GR_SIN_WAVE, + sampling_freq * 0.10, 100.0) + dst1 = gr.vector_sink_f () + head = gr.head (gr.sizeof_float, int (5*sampling_freq * 0.10)) + + agc = gr.agc_ff(1e-3, 1, 1, 1000) + + fg.connect (src1, head) + fg.connect (head, agc) + fg.connect (agc, dst1) + + if test_output == True: + fg.connect (agc, gr.file_sink(gr.sizeof_float, "test_agc_ff.dat")) + + fg.run () + dst_data = dst1.data () + self.assertFloatTuplesAlmostEqual (expected_result, dst_data, 4) + + def test_003(self): + ''' Test the complex AGC loop (attack and decay rate inputs) ''' + fg = self.fg + + expected_result = \ + ((100.000244140625+7.2191943445432116e-07j), + (0.80881959199905396+0.58764183521270752j), + (0.30894950032234192+0.95084899663925171j), + (-0.30895623564720154+0.95086973905563354j), + (-0.80887287855148315+0.58768033981323242j), + (-0.99984413385391235+5.850709250410091e-09j), + (-0.80889981985092163-0.58770018815994263j), + (-0.30897706747055054-0.95093393325805664j), + (0.30898112058639526-0.95094609260559082j), + (0.80893135070800781-0.58772283792495728j), + (0.99990922212600708-8.7766354184282136e-09j), + (0.80894720554351807+0.58773452043533325j), + (0.30899339914321899+0.95098406076431274j), + (-0.30899572372436523+0.95099133253097534j), + (-0.80896598100662231+0.58774799108505249j), + (-0.99994778633117676+1.4628290578855285e-08j), + (-0.80897533893585205-0.58775502443313599j), + (-0.30900305509567261-0.95101380348205566j), + (0.30900448560714722-0.95101797580718994j), + (0.80898630619049072-0.58776277303695679j), + (0.99997037649154663-1.7554345532744264e-08j), + (0.80899184942245483+0.58776694536209106j), + (0.30900871753692627+0.95103120803833008j), + (-0.30900952219963074+0.95103377103805542j), + (-0.8089984655380249+0.58777159452438354j), + (-0.99998390674591064+2.3406109050938539e-08j), + (-0.809001624584198-0.58777409791946411j), + (-0.30901208519935608-0.95104163885116577j), + (0.30901262164115906-0.95104306936264038j), + (0.80900543928146362-0.587776780128479j), + (0.99999171495437622-2.6332081404234486e-08j), + (0.80900734663009644+0.58777821063995361j), + (0.30901408195495605+0.95104765892028809j), + (-0.30901429057121277+0.95104855298995972j), + (-0.80900967121124268+0.58777981996536255j), + (-0.99999648332595825+3.2183805842578295e-08j), + (-0.80901080369949341-0.58778077363967896j), + (-0.30901527404785156-0.95105135440826416j), + (0.30901545286178589-0.95105189085006714j), + (0.80901217460632324-0.58778166770935059j), + (0.99999916553497314-3.5109700036173308e-08j), + (0.809012770652771+0.58778214454650879j), + (0.30901595950126648+0.9510534405708313j), + (-0.30901598930358887+0.95105385780334473j), + (-0.80901366472244263+0.58778274059295654j), + (-1.0000008344650269+4.0961388947380328e-08j), + (-0.8090139627456665-0.58778303861618042j), + (-0.30901634693145752-0.95105475187301636j), + (0.30901640653610229-0.95105493068695068j), + (0.80901449918746948-0.5877833366394043j)) + + sampling_freq = 100 + src1 = gr.sig_source_c (sampling_freq, gr.GR_SIN_WAVE, + sampling_freq * 0.10, 100) + dst1 = gr.vector_sink_c () + head = gr.head (gr.sizeof_gr_complex, int (5*sampling_freq * 0.10)) + + agc = gr.agc2_cc(1e-2, 1e-3, 1, 1, 1000) + + fg.connect (src1, head) + fg.connect (head, agc) + fg.connect (agc, dst1) + + if test_output == True: + fg.connect (agc, gr.file_sink(gr.sizeof_gr_complex, "test_agc2_cc.dat")) + + fg.run () + dst_data = dst1.data () + self.assertComplexTuplesAlmostEqual (expected_result, dst_data, 4) + + def test_004(self): + ''' Test the floating point AGC loop (attack and decay rate inputs) ''' + fg = self.fg + + expected_result = \ + (7.2191943445432116e-07, + 58.837181091308594, + 40.194305419921875, + 2.9183335304260254, + 0.67606079578399658, + 8.6260438791896377e-09, + -1.4542514085769653, + -1.9210131168365479, + -1.0450780391693115, + -0.61939650774002075, + -1.2590258613442984e-08, + 1.4308931827545166, + 1.9054338932037354, + 1.0443156957626343, + 0.61937344074249268, + 2.0983527804219193e-08, + -1.4308838844299316, + -1.9054274559020996, + -1.0443152189254761, + -0.61937344074249268, + -2.5180233009791664e-08, + 1.4308837652206421, + 1.9054274559020996, + 1.0443154573440552, + 0.61937344074249268, + 3.3573645197293445e-08, + -1.4308838844299316, + -1.9054274559020996, + -1.0443152189254761, + -0.61937350034713745, + -3.7770352179222755e-08, + 1.4308837652206421, + 1.9054274559020996, + 1.0443154573440552, + 0.61937350034713745, + 4.6163762590367696e-08, + -1.4308838844299316, + -1.9054274559020996, + -1.0443153381347656, + -0.61937344074249268, + -5.0360466019583328e-08, + 1.4308837652206421, + 1.9054274559020996, + 1.0443155765533447, + 0.61937344074249268, + 5.8753879983441948e-08, + -1.4308837652206421, + -1.9054274559020996, + -1.0443153381347656, + -0.61937344074249268) + + sampling_freq = 100 + src1 = gr.sig_source_f (sampling_freq, gr.GR_SIN_WAVE, + sampling_freq * 0.10, 100) + dst1 = gr.vector_sink_f () + head = gr.head (gr.sizeof_float, int (5*sampling_freq * 0.10)) + + agc = gr.agc2_ff(1e-2, 1e-3, 1, 1, 1000) + + fg.connect (src1, head) + fg.connect (head, agc) + fg.connect (agc, dst1) + + if test_output == True: + fg.connect (agc, gr.file_sink(gr.sizeof_float, "test_agc2_ff.dat")) + + fg.run () + dst_data = dst1.data () + self.assertFloatTuplesAlmostEqual (expected_result, dst_data, 4) + + + def test_005(self): + ''' Test the complex AGC loop (attack and decay rate inputs) ''' + fg = self.fg + + expected_result = \ + ((100.000244140625+7.2191943445432116e-07j), + (0.80881959199905396+0.58764183521270752j), + (0.30894950032234192+0.95084899663925171j), + (-0.30895623564720154+0.95086973905563354j), + (-0.80887287855148315+0.58768033981323242j), + (-0.99984413385391235+5.850709250410091e-09j), + (-0.80889981985092163-0.58770018815994263j), + (-0.30897706747055054-0.95093393325805664j), + (0.30898112058639526-0.95094609260559082j), + (0.80893135070800781-0.58772283792495728j), + (0.99990922212600708-8.7766354184282136e-09j), + (0.80894720554351807+0.58773452043533325j), + (0.30899339914321899+0.95098406076431274j), + (-0.30899572372436523+0.95099133253097534j), + (-0.80896598100662231+0.58774799108505249j), + (-0.99994778633117676+1.4628290578855285e-08j), + (-0.80897533893585205-0.58775502443313599j), + (-0.30900305509567261-0.95101380348205566j), + (0.30900448560714722-0.95101797580718994j), + (0.80898630619049072-0.58776277303695679j), + (0.99997037649154663-1.7554345532744264e-08j), + (0.80899184942245483+0.58776694536209106j), + (0.30900871753692627+0.95103120803833008j), + (-0.30900952219963074+0.95103377103805542j), + (-0.8089984655380249+0.58777159452438354j), + (-0.99998390674591064+2.3406109050938539e-08j), + (-0.809001624584198-0.58777409791946411j), + (-0.30901208519935608-0.95104163885116577j), + (0.30901262164115906-0.95104306936264038j), + (0.80900543928146362-0.587776780128479j), + (0.99999171495437622-2.6332081404234486e-08j), + (0.80900734663009644+0.58777821063995361j), + (0.30901408195495605+0.95104765892028809j), + (-0.30901429057121277+0.95104855298995972j), + (-0.80900967121124268+0.58777981996536255j), + (-0.99999648332595825+3.2183805842578295e-08j), + (-0.80901080369949341-0.58778077363967896j), + (-0.30901527404785156-0.95105135440826416j), + (0.30901545286178589-0.95105189085006714j), + (0.80901217460632324-0.58778166770935059j), + (0.99999916553497314-3.5109700036173308e-08j), + (0.809012770652771+0.58778214454650879j), + (0.30901595950126648+0.9510534405708313j), + (-0.30901598930358887+0.95105385780334473j), + (-0.80901366472244263+0.58778274059295654j), + (-1.0000008344650269+4.0961388947380328e-08j), + (-0.8090139627456665-0.58778303861618042j), + (-0.30901634693145752-0.95105475187301636j), + (0.30901640653610229-0.95105493068695068j), + (0.80901449918746948-0.5877833366394043j)) + + sampling_freq = 100 + src1 = gr.sig_source_c (sampling_freq, gr.GR_SIN_WAVE, + sampling_freq * 0.10, 100) + dst1 = gr.vector_sink_c () + head = gr.head (gr.sizeof_gr_complex, int (5*sampling_freq * 0.10)) + + agc = gr.agc2_cc(1e-2, 1e-3, 1, 1, 1000) + + fg.connect (src1, head) + fg.connect (head, agc) + fg.connect (agc, dst1) + + if test_output == True: + fg.connect (agc, gr.file_sink(gr.sizeof_gr_complex, "test_agc2_cc.dat")) + + fg.run () + dst_data = dst1.data () + self.assertComplexTuplesAlmostEqual (expected_result, dst_data, 4) + + + def test_100(self): # FIXME needs work + ''' Test complex feedforward agc with constant input ''' + input_data = 16*(0.0,) + 64*(1.0,) + 64*(0.0,) + expected_result = () + + src = gr.vector_source_c(input_data) + agc = gr.feedforward_agc_cc(16, 2.0) + dst = gr.vector_sink_c () + self.fg.connect (src, agc, dst) + + if test_output == True: + self.fg.connect (agc, gr.file_sink(gr.sizeof_gr_complex, "test_feedforward_cc.dat")) + + self.fg.run () + dst_data = dst.data () + #self.assertComplexTuplesAlmostEqual (expected_result, dst_data, 4) + + +if __name__ == '__main__': + gr_unittest.main () diff --git a/gnuradio-core/src/python/gnuradio/modulation_utils.py b/gnuradio-core/src/python/gnuradio/modulation_utils.py new file mode 100644 index 0000000000..a8bd7189f5 --- /dev/null +++ b/gnuradio-core/src/python/gnuradio/modulation_utils.py @@ -0,0 +1,81 @@ +# +# Copyright 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 2, 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 this program; if not, write to the Free Software Foundation, Inc., +# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +# + +""" +Miscellaneous utilities for managing mods and demods, as well as other items +useful in dealing with generalized handling of different modulations and demods. +""" + +import inspect + + +# Type 1 modulators accept a stream of bytes on their input and produce complex baseband output +_type_1_modulators = {} + +def type_1_mods(): + return _type_1_modulators + +def add_type_1_mod(name, mod_class): + _type_1_modulators[name] = mod_class + + +# Type 1 demodulators accept complex baseband input and produce a stream of bits, packed +# 1 bit / byte as their output. Their output is completely unambiguous. There is no need +# to resolve phase or polarity ambiguities. +_type_1_demodulators = {} + +def type_1_demods(): + return _type_1_demodulators + +def add_type_1_demod(name, demod_class): + _type_1_demodulators[name] = demod_class + + +def extract_kwargs_from_options(function, excluded_args, options): + """ + Given a function, a list of excluded arguments and the result of + parsing command line options, create a dictionary of key word + arguments suitable for passing to the function. The dictionary + will be populated with key/value pairs where the keys are those + that are common to the function's argument list (minus the + excluded_args) and the attributes in options. The values are the + corresponding values from options unless that value is None. + In that case, the corresponding dictionary entry is not populated. + + (This allows different modulations that have the same parameter + names, but different default values to coexist. The downside is + that --help in the option parser will list the default as None, + but in that case the default provided in the __init__ argument + list will be used since there is no kwargs entry.) + + @param function: the function whose parameter list will be examined + @param excluded_args: function arguments that are NOT to be added to the dictionary + @type excluded_args: sequence of strings + @param options: result of command argument parsing + @type options: optparse.Values + """ + # Try this in C++ ;) + args, varargs, varkw, defaults = inspect.getargspec(function) + d = {} + for kw in [a for a in args if a not in excluded_args]: + if hasattr(options, kw): + if getattr(options, kw) is not None: + d[kw] = getattr(options, kw) + return d diff --git a/gnuradio-core/src/python/gnuradio/packet_utils.py b/gnuradio-core/src/python/gnuradio/packet_utils.py index 7d4871473c..1dab48ab42 100644 --- a/gnuradio-core/src/python/gnuradio/packet_utils.py +++ b/gnuradio-core/src/python/gnuradio/packet_utils.py @@ -71,7 +71,8 @@ def conv_1_0_string_to_packed_binary_string(s): default_access_code = \ conv_packed_binary_string_to_1_0_string('\xAC\xDD\xA4\xE2\xF2\x8C\x20\xFC') - +preamble = \ + conv_packed_binary_string_to_1_0_string('\xAA\xAA\xAA\xAB') def is_1_0_string(s): if not isinstance(s, str): @@ -97,16 +98,17 @@ def dewhiten(s): def make_header(payload_len): return struct.pack('!HH', payload_len, payload_len) -def make_packet(payload, spb, bits_per_baud, access_code=default_access_code, pad_for_usrp=True): +def make_packet(payload, samples_per_symbol, bits_per_symbol, + access_code=default_access_code, pad_for_usrp=True): """ Build a packet, given access code and payload. - @param payload: packet payload, len [0, 4096] - @param spb: samples per baud (needed for padding calculation) - @type spb: int - @param bits_per_baud: (needed for padding calculation) - @type bits_per_baud: int - @param access_code: string of ascii 0's and 1's + @param payload: packet payload, len [0, 4096] + @param samples_per_symbol: samples per symbol (needed for padding calculation) + @type samples_per_symbol: int + @param bits_per_symbol: (needed for padding calculation) + @type bits_per_symbol: int + @param access_code: string of ascii 0's and 1's Packet will have access code at the beginning, followed by length, payload and finally CRC-32. @@ -115,6 +117,7 @@ def make_packet(payload, spb, bits_per_baud, access_code=default_access_code, pa raise ValueError, "access_code must be a string containing only 0's and 1's (%r)" % (access_code,) (packed_access_code, padded) = conv_1_0_string_to_packed_binary_string(access_code) + (packed_preamble, ignore) = conv_1_0_string_to_packed_binary_string(preamble) payload_with_crc = gru.gen_and_append_crc32(payload) #print "outbound crc =", string_to_hex_list(payload_with_crc[-4:]) @@ -124,14 +127,14 @@ def make_packet(payload, spb, bits_per_baud, access_code=default_access_code, pa if L > MAXLEN: raise ValueError, "len(payload) must be in [0, %d]" % (MAXLEN,) - pkt = ''.join((packed_access_code, make_header(L), whiten(payload_with_crc), '\x55')) + pkt = ''.join((packed_preamble, packed_access_code, make_header(L), whiten(payload_with_crc), '\x55')) if pad_for_usrp: - pkt = pkt + (_npadding_bytes(len(pkt), spb, bits_per_baud) * '\x55') + pkt = pkt + (_npadding_bytes(len(pkt), samples_per_symbol, bits_per_symbol) * '\x55') #print "make_packet: len(pkt) =", len(pkt) return pkt -def _npadding_bytes(pkt_byte_len, spb, bits_per_baud): +def _npadding_bytes(pkt_byte_len, samples_per_symbol, bits_per_symbol): """ Generate sufficient padding such that each packet ultimately ends up being a multiple of 512 bytes when sent across the USB. We @@ -140,13 +143,13 @@ def _npadding_bytes(pkt_byte_len, spb, bits_per_baud): is a multiple of 128 samples. @param ptk_byte_len: len in bytes of packet, not including padding. - @param spb: samples per baud == samples per bit (1 bit / baud with GMSK) - @type spb: int + @param samples_per_symbol: samples per bit (1 bit / symbolwith GMSK) + @type samples_per_symbol: int @returns number of bytes of padding to append. """ modulus = 128 - byte_modulus = gru.lcm(modulus/8, spb) * bits_per_baud / spb + byte_modulus = gru.lcm(modulus/8, samples_per_symbol) * bits_per_symbol / samples_per_symbol r = pkt_byte_len % byte_modulus if r == 0: return 0 |