diff options
Diffstat (limited to 'gr-digital')
-rw-r--r-- | gr-digital/python/Makefile.am | 25 | ||||
-rw-r--r-- | gr-digital/python/cpm.py | 249 | ||||
-rw-r--r-- | gr-digital/python/modulation_utils.py | 81 | ||||
-rw-r--r-- | gr-digital/python/modulation_utils2.py | 101 | ||||
-rw-r--r-- | gr-digital/python/packet_utils.py | 457 | ||||
-rw-r--r-- | gr-digital/python/pkt.py | 184 | ||||
-rwxr-xr-x | gr-digital/python/qa_constellation_receiver.py | 4 |
7 files changed, 1089 insertions, 12 deletions
diff --git a/gr-digital/python/Makefile.am b/gr-digital/python/Makefile.am index eea4dba955..164bafb998 100644 --- a/gr-digital/python/Makefile.am +++ b/gr-digital/python/Makefile.am @@ -45,16 +45,21 @@ noinst_PYTHON = \ qa_mpsk_receiver.py digital_PYTHON = \ - __init__.py \ - crc.py \ - bpsk.py \ - dbpsk.py \ - dqpsk.py \ - d8psk.py \ + __init__.py \ + bpsk.py \ + cpm.py \ + crc.py \ + d8psk.py \ + dbpsk.py \ + dqpsk.py \ generic_mod_demod.py \ - gmsk.py \ - psk.py \ - psk2.py \ - qam.py \ + gmsk.py \ + modulation_utils.py \ + modulation_utils2.py \ + packet_utils.py \ + pkt.py \ + psk.py \ + psk2.py \ + qam.py \ qpsk.py endif diff --git a/gr-digital/python/cpm.py b/gr-digital/python/cpm.py new file mode 100644 index 0000000000..8f593cd51e --- /dev/null +++ b/gr-digital/python/cpm.py @@ -0,0 +1,249 @@ +# +# CPM modulation and demodulation. +# +# +# Copyright 2005,2006,2007 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. +# + +# See gnuradio-examples/python/digital for examples + +from gnuradio import gr +from gnuradio import modulation_utils +from math import pi +import numpy +from pprint import pprint +import inspect + +# default values (used in __init__ and add_options) +_def_samples_per_symbol = 2 +_def_bits_per_symbol = 1 +_def_h_numerator = 1 +_def_h_denominator = 2 +_def_cpm_type = 0 # 0=CPFSK, 1=GMSK, 2=RC, 3=GENERAL +_def_bt = 0.35 +_def_symbols_per_pulse = 1 +_def_generic_taps = numpy.empty(1) +_def_verbose = False +_def_log = False + + +# ///////////////////////////////////////////////////////////////////////////// +# CPM modulator +# ///////////////////////////////////////////////////////////////////////////// + +class cpm_mod(gr.hier_block2): + def __init__(self, + samples_per_symbol=_def_samples_per_symbol, + bits_per_symbol=_def_bits_per_symbol, + h_numerator=_def_h_numerator, + h_denominator=_def_h_denominator, + cpm_type=_def_cpm_type, + bt=_def_bt, + symbols_per_pulse=_def_symbols_per_pulse, + generic_taps=_def_generic_taps, + verbose=_def_verbose, + log=_def_log): + """ + Hierarchical block for Continuous Phase + modulation. + + The input is a byte stream (unsigned char) + representing packed bits and the + output is the complex modulated signal at baseband. + + See Proakis for definition of generic CPM signals: + s(t)=exp(j phi(t)) + phi(t)= 2 pi h int_0^t f(t') dt' + f(t)=sum_k a_k g(t-kT) + (normalizing assumption: int_0^infty g(t) dt = 1/2) + + @param samples_per_symbol: samples per baud >= 2 + @type samples_per_symbol: integer + @param bits_per_symbol: bits per symbol + @type bits_per_symbol: integer + @param h_numerator: numerator of modulation index + @type h_numerator: integer + @param h_denominator: denominator of modulation index (numerator and denominator must be relative primes) + @type h_denominator: integer + @param cpm_type: supported types are: 0=CPFSK, 1=GMSK, 2=RC, 3=GENERAL + @type cpm_type: integer + @param bt: bandwidth symbol time product for GMSK + @type bt: float + @param symbols_per_pulse: shaping pulse duration in symbols + @type symbols_per_pulse: integer + @param generic_taps: define a generic CPM pulse shape (sum = samples_per_symbol/2) + @type generic_taps: array of floats + + @param verbose: Print information about modulator? + @type verbose: bool + @param debug: Print modulation data to files? + @type debug: bool + """ + + gr.hier_block2.__init__("cpm_mod", + gr.io_signature(1, 1, gr.sizeof_char), # Input signature + gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature + + self._samples_per_symbol = samples_per_symbol + self._bits_per_symbol = bits_per_symbol + self._h_numerator = h_numerator + self._h_denominator = h_denominator + self._cpm_type = cpm_type + self._bt=bt + if cpm_type == 0 or cpm_type == 2 or cpm_type == 3: # CPFSK, RC, Generic + self._symbols_per_pulse = symbols_per_pulse + elif cpm_type == 1: # GMSK + self._symbols_per_pulse = 4 + else: + raise TypeError, ("cpm_type must be an integer in {0,1,2,3}, is %r" % (cpm_type,)) + + self._generic_taps=numpy.array(generic_taps) + + if not isinstance(samples_per_symbol, int) or samples_per_symbol < 2: + raise TypeError, ("samples_per_symbol must be an integer >= 2, is %r" % (samples_per_symbol,)) + + self.nsymbols = 2**bits_per_symbol + self.sym_alphabet=numpy.arange(-(self.nsymbols-1),self.nsymbols,2) + + + self.ntaps = self._symbols_per_pulse * samples_per_symbol + sensitivity = 2 * pi * h_numerator / h_denominator / samples_per_symbol + + # Unpack Bytes into bits_per_symbol groups + self.B2s = gr.packed_to_unpacked_bb(bits_per_symbol,gr.GR_MSB_FIRST) + + + # Turn it into symmetric PAM data. + self.pam = gr.chunks_to_symbols_bf(self.sym_alphabet,1) + + # Generate pulse (sum of taps = samples_per_symbol/2) + if cpm_type == 0: # CPFSK + self.taps= (1.0/self._symbols_per_pulse/2,) * self.ntaps + elif cpm_type == 1: # GMSK + gaussian_taps = gr.firdes.gaussian( + 1.0/2, # gain + samples_per_symbol, # symbol_rate + bt, # bandwidth * symbol time + self.ntaps # number of taps + ) + sqwave = (1,) * samples_per_symbol # rectangular window + self.taps = numpy.convolve(numpy.array(gaussian_taps),numpy.array(sqwave)) + elif cpm_type == 2: # Raised Cosine + # generalize it for arbitrary roll-off factor + self.taps = (1-numpy.cos(2*pi*numpy.arange(0,self.ntaps)/samples_per_symbol/self._symbols_per_pulse))/(2*self._symbols_per_pulse) + elif cpm_type == 3: # Generic CPM + self.taps = generic_taps + else: + raise TypeError, ("cpm_type must be an integer in {0,1,2,3}, is %r" % (cpm_type,)) + + self.filter = gr.interp_fir_filter_fff(samples_per_symbol, self.taps) + + # FM modulation + self.fmmod = gr.frequency_modulator_fc(sensitivity) + + if verbose: + self._print_verbage() + + if log: + self._setup_logging() + + # Connect + self.connect(self, self.B2s, self.pam, self.filter, self.fmmod, self) + + #def samples_per_symbol(self): + #return self._samples_per_symbol + + #def bits_per_symbol(self): + #return self._bits_per_symbol + + #def h_numerator(self): + #return self._h_numerator + + #def h_denominator(self): + #return self._h_denominator + + #def cpm_type(self): + #return self._cpm_type + + #def bt(self): + #return self._bt + + #def symbols_per_pulse(self): + #return self._symbols_per_pulse + + + def _print_verbage(self): + print "Samples per symbol = %d" % self._samples_per_symbol + print "Bits per symbol = %d" % self._bits_per_symbol + print "h = " , self._h_numerator , " / " , self._h_denominator + print "Symbol alphabet = " , self.sym_alphabet + print "Symbols per pulse = %d" % self._symbols_per_pulse + print "taps = " , self.taps + + print "CPM type = %d" % self._cpm_type + if self._cpm_type == 1: + print "Gaussian filter BT = %.2f" % self._bt + + + def _setup_logging(self): + print "Modulation logging turned on." + self.connect(self.B2s, + gr.file_sink(gr.sizeof_float, "symbols.dat")) + self.connect(self.pam, + gr.file_sink(gr.sizeof_float, "pam.dat")) + self.connect(self.filter, + gr.file_sink(gr.sizeof_float, "filter.dat")) + self.connect(self.fmmod, + gr.file_sink(gr.sizeof_gr_complex, "fmmod.dat")) + + + def add_options(parser): + """ + Adds CPM modulation-specific options to the standard parser + """ + parser.add_option("", "--bt", type="float", default=_def_bt, + help="set bandwidth-time product [default=%default] (GMSK)") + add_options=staticmethod(add_options) + + + def extract_kwargs_from_options(options): + """ + Given command line options, create dictionary suitable for passing to __init__ + """ + return modulation_utils.extract_kwargs_from_options(cpm_mod.__init__, + ('self',), options) + extract_kwargs_from_options=staticmethod(extract_kwargs_from_options) + + + +# ///////////////////////////////////////////////////////////////////////////// +# CPM demodulator +# ///////////////////////////////////////////////////////////////////////////// +# +# Not yet implemented +# + + + +# +# Add these to the mod/demod registry +# +modulation_utils.add_type_1_mod('cpm', cpm_mod) +#modulation_utils.add_type_1_demod('cpm', cpm_demod) diff --git a/gr-digital/python/modulation_utils.py b/gr-digital/python/modulation_utils.py new file mode 100644 index 0000000000..71ba773895 --- /dev/null +++ b/gr-digital/python/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 3, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License along +# with 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/gr-digital/python/modulation_utils2.py b/gr-digital/python/modulation_utils2.py new file mode 100644 index 0000000000..f30055f4ac --- /dev/null +++ b/gr-digital/python/modulation_utils2.py @@ -0,0 +1,101 @@ +# +# Copyright 2010 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License along +# with 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 + +# Also record the constellation making functions of the modulations +_type_1_constellations = {} + +def type_1_constellations(): + return _type_1_constellations + +def add_type_1_constellation(name, constellation): + _type_1_constellations[name] = constellation + + +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 + +def extract_kwargs_from_options_for_class(cls, options): + """ + Given command line options, create dictionary suitable for passing to __init__ + """ + d = extract_kwargs_from_options( + cls.__init__, ('self',), options) + for base in cls.__bases__: + if hasattr(base, 'extract_kwargs_from_options'): + d.update(base.extract_kwargs_from_options(options)) + return d diff --git a/gr-digital/python/packet_utils.py b/gr-digital/python/packet_utils.py new file mode 100644 index 0000000000..e36b05413e --- /dev/null +++ b/gr-digital/python/packet_utils.py @@ -0,0 +1,457 @@ +# +# Copyright 2005,2006,2007 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. +# + +import struct +import numpy +from gnuradio import gru + + +def conv_packed_binary_string_to_1_0_string(s): + """ + '\xAF' --> '10101111' + """ + r = [] + for ch in s: + x = ord(ch) + for i in range(7,-1,-1): + t = (x >> i) & 0x1 + r.append(t) + + return ''.join(map(lambda x: chr(x + ord('0')), r)) + +def conv_1_0_string_to_packed_binary_string(s): + """ + '10101111' -> ('\xAF', False) + + Basically the inverse of conv_packed_binary_string_to_1_0_string, + but also returns a flag indicating if we had to pad with leading zeros + to get to a multiple of 8. + """ + if not is_1_0_string(s): + raise ValueError, "Input must be a string containing only 0's and 1's" + + # pad to multiple of 8 + padded = False + rem = len(s) % 8 + if rem != 0: + npad = 8 - rem + s = '0' * npad + s + padded = True + + assert len(s) % 8 == 0 + + r = [] + i = 0 + while i < len(s): + t = 0 + for j in range(8): + t = (t << 1) | (ord(s[i + j]) - ord('0')) + r.append(chr(t)) + i += 8 + return (''.join(r), padded) + + +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('\xA4\xF2') + +def is_1_0_string(s): + if not isinstance(s, str): + return False + for ch in s: + if not ch in ('0', '1'): + return False + return True + +def string_to_hex_list(s): + return map(lambda x: hex(ord(x)), s) + + +def whiten(s, o): + sa = numpy.fromstring(s, numpy.uint8) + z = sa ^ random_mask_vec8[o:len(sa)+o] + return z.tostring() + +def dewhiten(s, o): + return whiten(s, o) # self inverse + + +def make_header(payload_len, whitener_offset=0): + # Upper nibble is offset, lower 12 bits is len + val = ((whitener_offset & 0xf) << 12) | (payload_len & 0x0fff) + #print "offset =", whitener_offset, " len =", payload_len, " val=", val + return struct.pack('!HH', val, val) + +def make_packet(payload, samples_per_symbol, bits_per_symbol, + access_code=default_access_code, pad_for_usrp=True, + whitener_offset=0, whitening=True): + """ + Build a packet, given access code, payload, and whitener offset + + @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 + @param whitener_offset offset into whitener string to use [0-16) + + Packet will have access code at the beginning, followed by length, payload + and finally CRC-32. + """ + if not is_1_0_string(access_code): + raise ValueError, "access_code must be a string containing only 0's and 1's (%r)" % (access_code,) + + if not whitener_offset >=0 and whitener_offset < 16: + raise ValueError, "whitener_offset must be between 0 and 15, inclusive (%i)" % (whitener_offset,) + + (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:]) + + L = len(payload_with_crc) + MAXLEN = len(random_mask_tuple) + if L > MAXLEN: + raise ValueError, "len(payload) must be in [0, %d]" % (MAXLEN,) + + if whitening: + pkt = ''.join((packed_preamble, packed_access_code, make_header(L, whitener_offset), + whiten(payload_with_crc, whitener_offset), '\x55')) + else: + pkt = ''.join((packed_preamble, packed_access_code, make_header(L, whitener_offset), + (payload_with_crc), '\x55')) + + if pad_for_usrp: + pkt = pkt + (_npadding_bytes(len(pkt), int(samples_per_symbol), bits_per_symbol) * '\x55') + + #print "make_packet: len(pkt) =", len(pkt) + return pkt + +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 + send 4-byte samples across the USB (16-bit I and 16-bit Q), thus + we want to pad so that after modulation the resulting packet + is a multiple of 128 samples. + + @param ptk_byte_len: len in bytes of packet, not including padding. + @param samples_per_symbol: samples per bit (1 bit / symbolwidth GMSK) + @type samples_per_symbol: int + @param bits_per_symbol: bits per symbol (log2(modulation order)) + @type bits_per_symbol: int + + @returns number of bytes of padding to append. + """ + modulus = 128 + 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 + return byte_modulus - r + + +def unmake_packet(whitened_payload_with_crc, whitener_offset=0, dewhitening=True): + """ + Return (ok, payload) + + @param whitened_payload_with_crc: string + """ + + if dewhitening: + payload_with_crc = dewhiten(whitened_payload_with_crc, whitener_offset) + else: + payload_with_crc = (whitened_payload_with_crc) + + ok, payload = gru.check_crc32(payload_with_crc) + + if 0: + print "payload_with_crc =", string_to_hex_list(payload_with_crc) + print "ok = %r, len(payload) = %d" % (ok, len(payload)) + print "payload =", string_to_hex_list(payload) + + return ok, payload + + +# FYI, this PN code is the output of a 15-bit LFSR +random_mask_tuple = ( + 255, 63, 0, 16, 0, 12, 0, 5, 192, 3, 16, 1, 204, 0, 85, 192, + 63, 16, 16, 12, 12, 5, 197, 195, 19, 17, 205, 204, 85, 149, 255, 47, + 0, 28, 0, 9, 192, 6, 208, 2, 220, 1, 153, 192, 106, 208, 47, 28, + 28, 9, 201, 198, 214, 210, 222, 221, 152, 89, 170, 186, 255, 51, 0, 21, + 192, 15, 16, 4, 12, 3, 69, 193, 243, 16, 69, 204, 51, 21, 213, 207, + 31, 20, 8, 15, 70, 132, 50, 227, 85, 137, 255, 38, 192, 26, 208, 11, + 28, 7, 73, 194, 182, 209, 182, 220, 118, 217, 230, 218, 202, 219, 23, 27, + 78, 139, 116, 103, 103, 106, 170, 175, 63, 60, 16, 17, 204, 12, 85, 197, + 255, 19, 0, 13, 192, 5, 144, 3, 44, 1, 221, 192, 89, 144, 58, 236, + 19, 13, 205, 197, 149, 147, 47, 45, 220, 29, 153, 201, 170, 214, 255, 30, + 192, 8, 80, 6, 188, 2, 241, 193, 132, 80, 99, 124, 41, 225, 222, 200, + 88, 86, 186, 190, 243, 48, 69, 212, 51, 31, 85, 200, 63, 22, 144, 14, + 236, 4, 77, 195, 117, 145, 231, 44, 74, 157, 247, 41, 134, 158, 226, 232, + 73, 142, 182, 228, 118, 203, 102, 215, 106, 222, 175, 24, 124, 10, 161, 199, + 56, 82, 146, 189, 173, 177, 189, 180, 113, 183, 100, 118, 171, 102, 255, 106, + 192, 47, 16, 28, 12, 9, 197, 198, 211, 18, 221, 205, 153, 149, 170, 239, + 63, 12, 16, 5, 204, 3, 21, 193, 207, 16, 84, 12, 63, 69, 208, 51, + 28, 21, 201, 207, 22, 212, 14, 223, 68, 88, 51, 122, 149, 227, 47, 9, + 220, 6, 217, 194, 218, 209, 155, 28, 107, 73, 239, 118, 204, 38, 213, 218, + 223, 27, 24, 11, 74, 135, 119, 34, 166, 153, 186, 234, 243, 15, 5, 196, + 3, 19, 65, 205, 240, 85, 132, 63, 35, 80, 25, 252, 10, 193, 199, 16, + 82, 140, 61, 165, 209, 187, 28, 115, 73, 229, 246, 203, 6, 215, 66, 222, + 177, 152, 116, 106, 167, 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231, 18, 202, + 141, 151, 37, 174, 155, 60, 107, 81, 239, 124, 76, 33, 245, 216, 71, 26, + 178, 139, 53, 167, 87, 58, 190, 147, 48, 109, 212, 45, 159, 93, 168, 57, + 190, 146, 240, 109, 132, 45, 163, 93, 185, 249, 178, 194, 245, 145, 135, 44, + 98, 157, 233, 169, 142, 254, 228, 64, 75, 112, 55, 100, 22, 171, 78, 255, + 116, 64, 39, 112, 26, 164, 11, 59, 71, 83, 114, 189, 229, 177, 139, 52, + 103, 87, 106, 190, 175, 48, 124, 20, 33, 207, 88, 84, 58, 191, 83, 48, + 61, 212, 17, 159, 76, 104, 53, 238, 151, 12, 110, 133, 236, 99, 13, 233, + 197, 142, 211, 36, 93, 219, 121, 155, 98, 235, 105, 143, 110, 228, 44, 75, + 93, 247, 121, 134, 162, 226, 249, 137, 130, 230, 225, 138, 200, 103, 22, 170, + 142, 255, 36, 64, 27, 112, 11, 100, 7, 107, 66, 175, 113, 188, 36, 113, + 219, 100, 91, 107, 123, 111, 99, 108, 41, 237, 222, 205, 152, 85, 170, 191, + 63, 48, 16, 20, 12, 15, 69, 196, 51, 19, 85, 205, 255, 21, 128, 15, + 32, 4, 24, 3, 74, 129, 247, 32, 70, 152, 50, 234, 149, 143, 47, 36, + 28, 27, 73, 203, 118, 215, 102, 222, 170, 216, 127, 26, 160, 11, 56, 7, + 82, 130, 189, 161, 177, 184, 116, 114, 167, 101, 186, 171, 51, 63, 85, 208, + 63, 28, 16, 9, 204, 6, 213, 194, 223, 17, 152, 12, 106, 133, 239, 35, + 12, 25, 197, 202, 211, 23, 29, 206, 137, 148, 102, 239, 106, 204, 47, 21, + 220, 15, 25, 196, 10, 211, 71, 29, 242, 137, 133, 166, 227, 58, 201, 211, + 22, 221, 206, 217, 148, 90, 239, 123, 12, 35, 69, 217, 243, 26, 197, 203, + 19, 23, 77, 206, 181, 148, 119, 47, 102, 156, 42, 233, 223, 14, 216, 4, + 90, 131, 123, 33, 227, 88, 73, 250, 182, 195, 54, 209, 214, 220, 94, 217, + 248, 90, 194, 187, 17, 179, 76, 117, 245, 231, 7, 10, 130, 135, 33, 162, + 152, 121, 170, 162, 255, 57, 128, 18, 224, 13, 136, 5, 166, 131, 58, 225, + 211, 8, 93, 198, 185, 146, 242, 237, 133, 141, 163, 37, 185, 219, 50, 219, + 85, 155, 127, 43, 96, 31, 104, 8, 46, 134, 156, 98, 233, 233, 142, 206, + 228, 84, 75, 127, 119, 96, 38, 168, 26, 254, 139, 0, 103, 64, 42, 176, + 31, 52, 8, 23, 70, 142, 178, 228, 117, 139, 103, 39, 106, 154, 175, 43, + 60, 31, 81, 200, 60, 86, 145, 254, 236, 64, 77, 240, 53, 132, 23, 35, + 78, 153, 244, 106, 199, 111, 18, 172, 13, 189, 197, 177, 147, 52, 109, 215, + 109, 158, 173, 168, 125, 190, 161, 176, 120, 116, 34, 167, 89, 186, 186, 243, + 51, 5, 213, 195, 31, 17, 200, 12, 86, 133, 254, 227, 0, 73, 192, 54, + 208, 22, 220, 14, 217, 196, 90, 211, 123, 29, 227, 73, 137, 246, 230, 198, + 202, 210, 215, 29, 158, 137, 168, 102, 254, 170, 192, 127, 16, 32, 12, 24, + 5, 202, 131, 23, 33, 206, 152, 84, 106, 191, 111, 48, 44, 20, 29, 207, + 73, 148, 54, 239, 86, 204, 62, 213, 208, 95, 28, 56, 9, 210, 134, 221, + 162, 217, 185, 154, 242, 235, 5, 143, 67, 36, 49, 219, 84, 91, 127, 123, + 96, 35, 104, 25, 238, 138, 204, 103, 21, 234, 143, 15, 36, 4, 27, 67, + 75, 113, 247, 100, 70, 171, 114, 255, 101, 128, 43, 32, 31, 88, 8, 58, + 134, 147, 34, 237, 217, 141, 154, 229, 171, 11, 63, 71, 80, 50, 188, 21, + 177, 207, 52, 84, 23, 127, 78, 160, 52, 120, 23, 98, 142, 169, 164, 126, + 251, 96, 67, 104, 49, 238, 148, 76, 111, 117, 236, 39, 13, 218, 133, 155, + 35, 43, 89, 223, 122, 216, 35, 26, 153, 203, 42, 215, 95, 30, 184, 8, + 114, 134, 165, 162, 251, 57, 131, 82, 225, 253, 136, 65, 166, 176, 122, 244, + 35, 7, 89, 194, 186, 209, 179, 28, 117, 201, 231, 22, 202, 142, 215, 36, + 94, 155, 120, 107, 98, 175, 105, 188, 46, 241, 220, 68, 89, 243, 122, 197, + 227, 19, 9, 205, 198, 213, 146, 223, 45, 152, 29, 170, 137, 191, 38, 240, + 26, 196, 11, 19, 71, 77, 242, 181, 133, 183, 35, 54, 153, 214, 234, 222, + 207, 24, 84, 10, 191, 71, 48, 50, 148, 21, 175, 79, 60, 52, 17, 215, + 76, 94, 181, 248, 119, 2, 166, 129, 186, 224, 115, 8, 37, 198, 155, 18, + 235, 77, 143, 117, 164, 39, 59, 90, 147, 123, 45, 227, 93, 137, 249, 166, + 194, 250, 209, 131, 28, 97, 201, 232, 86, 206, 190, 212, 112, 95, 100, 56, + 43, 82, 159, 125, 168, 33, 190, 152, 112, 106, 164, 47, 59, 92, 19, 121, + 205, 226, 213, 137, 159, 38, 232, 26, 206, 139, 20, 103, 79, 106, 180, 47, + 55, 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160, 109, 184, 45, 178, 157, 181, 169, + 183, 62, 246, 144, 70, 236, 50, 205, 213, 149, 159, 47, 40, 28, 30, 137, + 200, 102, 214, 170, 222, 255, 24, 64, 10, 176, 7, 52, 2, 151, 65, 174, + 176, 124, 116, 33, 231, 88, 74, 186, 183, 51, 54, 149, 214, 239, 30, 204, + 8, 85, 198, 191, 18, 240, 13, 132, 5, 163, 67, 57, 241, 210, 196, 93, + 147, 121, 173, 226, 253, 137, 129, 166, 224, 122, 200, 35, 22, 153, 206, 234, + 212, 79, 31, 116, 8, 39, 70, 154, 178, 235, 53, 143, 87, 36, 62, 155, + 80, 107, 124, 47, 97, 220, 40, 89, 222, 186, 216, 115, 26, 165, 203, 59, + 23, 83, 78, 189, 244, 113, 135, 100, 98, 171, 105, 191, 110, 240, 44, 68, + 29, 243, 73, 133, 246, 227, 6, 201, 194, 214, 209, 158, 220, 104, 89, 238, + 186, 204, 115, 21, 229, 207, 11, 20, 7, 79, 66, 180, 49, 183, 84, 118, + 191, 102, 240, 42, 196, 31, 19, 72, 13, 246, 133, 134, 227, 34, 201, 217, + 150, 218, 238, 219, 12, 91, 69, 251, 115, 3, 101, 193, 235, 16, 79, 76, + 52, 53, 215, 87, 30, 190, 136, 112, 102, 164, 42, 251, 95, 3, 120, 1, + 226, 128, 73, 160, 54, 248, 22, 194, 142, 209, 164, 92, 123, 121, 227, 98, + 201, 233, 150, 206, 238, 212, 76, 95, 117, 248, 39, 2, 154, 129, 171, 32, + 127, 88, 32, 58, 152, 19, 42, 141, 223, 37, 152, 27, 42, 139, 95, 39, + 120, 26, 162, 139, 57, 167, 82, 250, 189, 131, 49, 161, 212, 120, 95, 98, + 184, 41, 178, 158, 245, 168, 71, 62, 178, 144, 117, 172, 39, 61, 218, 145, + 155, 44, 107, 93, 239, 121, 140, 34, 229, 217, 139, 26, 231, 75, 10, 183, + 71, 54, 178, 150, 245, 174, 199, 60, 82, 145, 253, 172, 65, 189, 240, 113, + 132, 36, 99, 91, 105, 251, 110, 195, 108, 81, 237, 252, 77, 129, 245, 160, + 71, 56, 50, 146, 149, 173, 175, 61, 188, 17, 177, 204, 116, 85, 231, 127, + 10, 160, 7, 56, 2, 146, 129, 173, 160, 125, 184, 33, 178, 152, 117, 170, + 167, 63, 58, 144, 19, 44, 13, 221, 197, 153, 147, 42, 237, 223, 13, 152, + 5, 170, 131, 63, 33, 208, 24, 92, 10, 185, 199, 50, 210, 149, 157, 175, + 41, 188, 30, 241, 200, 68, 86, 179, 126, 245, 224, 71, 8, 50, 134, 149, + 162, 239, 57, 140, 18, 229, 205, 139, 21, 167, 79, 58, 180, 19, 55, 77, + 214, 181, 158, 247, 40, 70, 158, 178, 232, 117, 142, 167, 36, 122, 155, 99, + 43, 105, 223, 110, 216, 44, 90, 157, 251, 41, 131, 94, 225, 248, 72, 66, + 182, 177, 182, 244, 118, 199, 102, 210, 170, 221, 191, 25, 176, 10, 244, 7, + 7, 66, 130, 177, 161, 180, 120, 119, 98, 166, 169, 186, 254, 243, 0, 69, + 192, 51, 16, 21, 204, 15, 21, 196, 15, 19, 68, 13, 243, 69, 133, 243, + 35, 5, 217, 195, 26, 209, 203, 28, 87, 73, 254, 182, 192, 118, 208, 38, + 220, 26, 217, 203, 26, 215, 75, 30, 183, 72, 118, 182, 166, 246, 250, 198, + 195, 18, 209, 205, 156, 85, 169, 255, 62, 192, 16, 80, 12, 60, 5, 209, + 195, 28, 81, 201, 252, 86, 193, 254, 208, 64, 92, 48, 57, 212, 18, 223, + 77, 152, 53, 170, 151, 63, 46, 144, 28, 108, 9, 237, 198, 205, 146, 213, + 173, 159, 61, 168, 17, 190, 140, 112, 101, 228, 43, 11, 95, 71, 120, 50, + 162, 149, 185, 175, 50, 252, 21, 129, 207, 32, 84, 24, 63, 74, 144, 55, + 44, 22, 157, 206, 233, 148, 78, 239, 116, 76, 39, 117, 218, 167, 27, 58, + 139, 83, 39, 125, 218, 161, 155, 56, 107, 82, 175, 125, 188, 33, 177, 216, + 116, 90, 167, 123, 58, 163, 83, 57, 253, 210, 193, 157, 144, 105, 172, 46, + 253, 220, 65, 153, 240, 106, 196, 47, 19, 92, 13, 249, 197, 130, 211, 33, + 157, 216, 105, 154, 174, 235, 60, 79, 81, 244, 60, 71, 81, 242, 188, 69, + 177, 243, 52, 69, 215, 115, 30, 165, 200, 123, 22, 163, 78, 249, 244, 66, + 199, 113, 146, 164, 109, 187, 109, 179, 109, 181, 237, 183, 13, 182, 133, 182, + 227, 54, 201, 214, 214, 222, 222, 216, 88, 90, 186, 187, 51, 51, 255, 63 ) + +random_mask_vec8 = numpy.array(random_mask_tuple, numpy.uint8) + diff --git a/gr-digital/python/pkt.py b/gr-digital/python/pkt.py new file mode 100644 index 0000000000..aa720d1a52 --- /dev/null +++ b/gr-digital/python/pkt.py @@ -0,0 +1,184 @@ +# +# Copyright 2005, 2006, 2007 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. +# + +from math import pi +from gnuradio import gr, packet_utils +import gnuradio.gr.gr_threading as _threading + + +# ///////////////////////////////////////////////////////////////////////////// +# mod/demod with packets as i/o +# ///////////////////////////////////////////////////////////////////////////// + +class mod_pkts(gr.hier_block2): + """ + Wrap an arbitrary digital modulator in our packet handling framework. + + Send packets by calling send_pkt + """ + def __init__(self, modulator, access_code=None, msgq_limit=2, pad_for_usrp=True, use_whitener_offset=False, + modulate=True): + """ + Hierarchical block for sending packets + + Packets to be sent are enqueued by calling send_pkt. + The output is the complex modulated signal at baseband. + + @param modulator: instance of modulator class (gr_block or hier_block2) + @type modulator: complex baseband out + @param access_code: AKA sync vector + @type access_code: string of 1's and 0's between 1 and 64 long + @param msgq_limit: maximum number of messages in message queue + @type msgq_limit: int + @param pad_for_usrp: If true, packets are padded such that they end up a multiple of 128 samples + @param use_whitener_offset: If true, start of whitener XOR string is incremented each packet + @param modulate: If false, no modulation will be performed. + + See gmsk_mod for remaining parameters + """ + if modulate: + output_size = gr.sizeof_gr_complex + else: + output_size = gr.sizeof_char + + gr.hier_block2.__init__(self, "mod_pkts", + gr.io_signature(0, 0, 0), # Input signature + gr.io_signature(1, 1, output_size)) # Output signature + + self._modulator = modulator + self._pad_for_usrp = pad_for_usrp + self._use_whitener_offset = use_whitener_offset + self._whitener_offset = 0 + + if access_code is None: + access_code = packet_utils.default_access_code + if not packet_utils.is_1_0_string(access_code): + 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) + if modulate: + self.connect(self._pkt_input, self._modulator, self) + else: + self.connect(self._pkt_input, self) + + 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._modulator.samples_per_symbol(), + self._modulator.bits_per_symbol(), + self._access_code, + self._pad_for_usrp, + self._whitener_offset) + #print "pkt =", string_to_hex_list(pkt) + msg = gr.message_from_string(pkt) + if self._use_whitener_offset is True: + self._whitener_offset = (self._whitener_offset + 1) % 16 + + self._pkt_input.msgq().insert_tail(msg) + + + +class demod_pkts(gr.hier_block2): + """ + Wrap an arbitrary digital demodulator in our packet handling framework. + + The input is complex baseband. When packets are demodulated, they are passed to the + app via the callback. + """ + + def __init__(self, demodulator, access_code=None, callback=None, threshold=-1, demodulate=True): + """ + Hierarchical block for demodulating and deframing packets. + + The input is the complex modulated signal at baseband. + Demodulated packets are sent to the handler. + + If demodulator is None it is assumed the input is already demodulated. + + @param demodulator: instance of demodulator class (gr_block or hier_block2) + @type demodulator: complex baseband in + @param access_code: AKA sync vector + @type access_code: string of 1's and 0's + @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 + """ + + if demodulator is not None: + input_size = gr.sizeof_gr_complex + else: + input_size = gr.sizeof_char + + gr.hier_block2.__init__(self, "demod_pkts", + gr.io_signature(1, 1, input_size), # Input signature + gr.io_signature(0, 0, 0)) # Output signature + + self._demodulator = demodulator + if access_code is None: + access_code = packet_utils.default_access_code + 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.correlator = gr.correlate_access_code_bb(access_code, threshold) + + self.framer_sink = gr.framer_sink_1(self._rcvd_pktq) + if self._demodulator is not None: + self.connect(self, self._demodulator, self.correlator, self.framer_sink) + else: + self.connect(self, self.correlator, self.framer_sink) + + if callback is not None: + self._watcher = _queue_watcher_thread(self._rcvd_pktq, callback) + + +class _queue_watcher_thread(_threading.Thread): + def __init__(self, rcvd_pktq, callback): + _threading.Thread.__init__(self) + self.setDaemon(1) + self.rcvd_pktq = rcvd_pktq + self.callback = callback + self.keep_running = True + self.start() + + + def run(self): + while self.keep_running: + msg = self.rcvd_pktq.delete_head() + ok, payload = packet_utils.unmake_packet(msg.to_string(), int(msg.arg1())) + if self.callback: + self.callback(ok, payload) diff --git a/gr-digital/python/qa_constellation_receiver.py b/gr-digital/python/qa_constellation_receiver.py index 70b62c7aab..cb4a0c10e7 100755 --- a/gr-digital/python/qa_constellation_receiver.py +++ b/gr-digital/python/qa_constellation_receiver.py @@ -22,9 +22,9 @@ import random -from gnuradio import gr, blks2, packet_utils, gr_unittest +from gnuradio import gr, blks2, gr_unittest from utils import mod_codes, alignment -import digital_swig +import digital_swig, packet_utils from generic_mod_demod import generic_mod, generic_demod from qa_constellation import tested_constellations, twod_constell |