def __init__(self, constellation, differential, rotation):
if constellation.arity() > 256:
# If this becomes limiting some of the blocks should be generalised so
# that they can work with shorts and ints as well as chars.
raise ValueError("Constellation cannot contain more than 256 points.")
gr.hier_block2.__init__(self, "mod_demod",
gr.io_signature(1, 1, gr.sizeof_char), # Input signature
gr.io_signature(1, 1, gr.sizeof_char)) # Output signature
arity = constellation.arity()
# TX
self.constellation = constellation
self.differential = differential
import weakref
self.blocks = [weakref.proxy(self)]
# We expect a stream of unpacked bits.
# First step is to pack them.
self.blocks.append(
gr.unpacked_to_packed_bb(1, gr.GR_MSB_FIRST))
# Second step we unpack them such that we have k bits in each byte where
# each constellation symbol hold k bits.
self.blocks.append(
gr.packed_to_unpacked_bb(self.constellation.bits_per_symbol(),
gr.GR_MSB_FIRST))
# Apply any pre-differential coding
# Gray-coding is done here if we're also using differential coding.
if self.constellation.apply_pre_diff_code():
self.blocks.append(gr.map_bb(self.constellation.pre_diff_code()))
# Differential encoding.
if self.differential:
self.blocks.append(gr.diff_encoder_bb(arity))
# Convert to constellation symbols.
self.blocks.append(gr.chunks_to_symbols_bc(self.constellation.points(),
self.constellation.dimensionality()))
# CHANNEL
# Channel just consists of a rotation to check differential coding.
if rotation is not None:
self.blocks.append(gr.multiply_const_cc(rotation))
# RX
# Convert the constellation symbols back to binary values.
self.blocks.append(digital_swig.constellation_decoder_cb(self.constellation.base()))
# Differential decoding.
if self.differential:
self.blocks.append(gr.diff_decoder_bb(arity))
# Decode any pre-differential coding.
if self.constellation.apply_pre_diff_code():
self.blocks.append(gr.map_bb(
mod_codes.invert_code(self.constellation.pre_diff_code())))
# unpack the k bit vector into a stream of bits
self.blocks.append(gr.unpack_k_bits_bb(
self.constellation.bits_per_symbol()))
# connect to block output
check_index = len(self.blocks)
self.blocks = self.blocks[:check_index]
self.blocks.append(weakref.proxy(self))
self.connect(*self.blocks)
def __init__(self,
sps, # Samples per symbol
excess_bw, # RRC filter excess bandwidth (typically 0.35-0.5)
amplitude, # DAC output level, 0-32767, typically 2000-8000
vector_source, # Indicate if it's the infinite sequence of 1, or by use the code to change the amplitude
):
gr.hier_block2.__init__(self, "bpsk_modulator",
gr.io_signature(0, 0, 0), # Input signature
gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature
# Create BERT data bit stream
self.vector_source = vector_source
self._scrambler = gr.scrambler_bb(0x8A, 0x7F, 31) # CCSDS 7-bit scrambler
# Map to constellation
self._constellation = [-1+0j, 1+0j]
self._mapper = gr.chunks_to_symbols_bc(self._constellation)
# Create RRC with specified excess bandwidth
taps = gr.firdes.root_raised_cosine(sps, # Gain
sps, # Sampling rate
1.0, # Symbol rate
excess_bw, # Roll-off factor
11*sps) # Number of taps
self._rrc = gr.interp_fir_filter_ccf(sps, # Interpolation rate
taps) # FIR taps
self.amp = gr.multiply_const_cc(amplitude)
# Wire block inputs and outputs
self.connect(self.vector_source, self._scrambler, self._mapper, self._rrc, self.amp, self)
def __init__(self,
sps, # Samples per symbol
excess_bw, # RRC filter excess bandwidth (typically 0.35-0.5)
amplitude # DAC output level, 0-32767, typically 2000-8000
):
gr.hier_block2.__init__(self, "transmit_path",
gr.io_signature(0, 0, 0), # Input signature
gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature
# Create BERT data bit stream
self._bits = gr.vector_source_b([1,], True) # Infinite stream of ones
self._scrambler = gr.scrambler_bb(0x8A, 0x7F, 7) # CCSDS 7-bit scrambler
# Map to constellation
self._constellation = [-1+0j, 1+0j]
self._mapper = gr.chunks_to_symbols_bc(self._constellation)
# Create RRC with specified excess bandwidth
taps = gr.firdes.root_raised_cosine(sps*amplitude, # Gain
sps, # Sampling rate
1.0, # Symbol rate
excess_bw, # Roll-off factor
11*sps) # Number of taps
self._rrc = gr.interp_fir_filter_ccf(sps, # Interpolation rate
taps) # FIR taps
# Wire block inputs and outputs
self.connect(self._bits, self._scrambler, self._mapper, self._rrc, self)
def key_factory(index):
print "FACTORY CALLED index = %d"%(index);
r = es.es_pyhandler();
excess_bw = 0.5;
sps = 4;
amplitude = sig_amp;
taps = gr.firdes.root_raised_cosine(sps*amplitude, # Gain
sps, # Sampling rate
1.0, # Symbol rate
excess_bw, # Roll-off factor
11*sps) # Number of taps
blocks = {};
blocks["src"] = es.vector_source([1])
blocks["scrambler"] = gr.scrambler_bb(0x8A, 0x7F, 7);
blocks["mapper"] = gr.chunks_to_symbols_bc( [-1+0j, 0+1j, 1+0j, 0-1j] );
blocks["rrc"] = gr.interp_fir_filter_ccf(sps, taps);
r.sink = es.vector_sink([gr.sizeof_gr_complex]);
r.set_pyb2(blocks);
tb = gr.top_block();
tb.connect( blocks["src"], blocks["scrambler"], blocks["mapper"], blocks["rrc"], r.sink );
r.tb = tb.to_top_block();
return r;
def __init__(self, sample_rate, symbol_rate):
gr.hier_block2.__init__(
self,
"dvb_s_modulator_bc",
gr.io_signature(1, 1, gr.sizeof_char), # Input signature
gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature
samples_per_symbol = sample_rate / symbol_rate
if samples_per_symbol < 2:
raise TypeError, "Samples per symbol must be >= 2"
# Form symbols with 2 bits per symbol
self.pack = gr.unpacked_to_packed_bb(1, gr.GR_MSB_FIRST)
self.reunpack = gr.packed_to_unpacked_bb(2, gr.GR_MSB_FIRST)
self.mapper = gr.chunks_to_symbols_bc(mod_constellation)
# Design FIR filter taps for square root raised cosine filter
ntaps = 11 * int(samples_per_symbol * nfilts)
rrc_taps = gr.firdes.root_raised_cosine(nfilts, nfilts, 1.0,
dvb_swig.RRC_ROLLOFF_FACTOR,
ntaps)
# Baseband pulse shaping filter
self.rrc_filter = gr.pfb_arb_resampler_ccf(samples_per_symbol,
rrc_taps)
self.connect(self, self.pack, self.reunpack, self.mapper,
self.rrc_filter, self)
def __init__(self, constellation, differential, rotation):
if constellation.arity() > 256:
# If this becomes limiting some of the blocks should be generalised so
# that they can work with shorts and ints as well as chars.
raise ValueError("Constellation cannot contain more than 256 points.")
gr.hier_block2.__init__(self, "mod_demod",
gr.io_signature(1, 1, gr.sizeof_char), # Input signature
gr.io_signature(1, 1, gr.sizeof_char)) # Output signature
arity = constellation.arity()
# TX
self.constellation = constellation
self.differential = differential
self.blocks = [self]
# We expect a stream of unpacked bits.
# First step is to pack them.
self.blocks.append(
gr.unpacked_to_packed_bb(1, gr.GR_MSB_FIRST))
# Second step we unpack them such that we have k bits in each byte where
# each constellation symbol hold k bits.
self.blocks.append(
gr.packed_to_unpacked_bb(self.constellation.bits_per_symbol(),
gr.GR_MSB_FIRST))
# Apply any pre-differential coding
# Gray-coding is done here if we're also using differential coding.
if self.constellation.apply_pre_diff_code():
self.blocks.append(gr.map_bb(self.constellation.pre_diff_code()))
# Differential encoding.
if self.differential:
self.blocks.append(gr.diff_encoder_bb(arity))
# Convert to constellation symbols.
self.blocks.append(gr.chunks_to_symbols_bc(self.constellation.points(),
self.constellation.dimensionality()))
# CHANNEL
# Channel just consists of a rotation to check differential coding.
if rotation is not None:
self.blocks.append(gr.multiply_const_cc(rotation))
# RX
# Convert the constellation symbols back to binary values.
self.blocks.append(digital_swig.constellation_decoder_cb(self.constellation.base()))
# Differential decoding.
if self.differential:
self.blocks.append(gr.diff_decoder_bb(arity))
# Decode any pre-differential coding.
if self.constellation.apply_pre_diff_code():
self.blocks.append(gr.map_bb(
mod_codes.invert_code(self.constellation.pre_diff_code())))
# unpack the k bit vector into a stream of bits
self.blocks.append(gr.unpack_k_bits_bb(
self.constellation.bits_per_symbol()))
# connect to block output
check_index = len(self.blocks)
self.blocks = self.blocks[:check_index]
self.blocks.append(self)
self.connect(*self.blocks)
def mod_bits_qpsk(strbits, syms=[0, 1, 3, 2], pts=[-1, 1j, 1, -1j]):
src = gr.vector_source_b(es.string_to_vector(strbits))
unpack = gr.packed_to_unpacked_bb(1, gr.GR_MSB_FIRST)
pack = gr.pack_k_bits_bb(2)
bts = gr.map_bb((syms))
mapper = gr.chunks_to_symbols_bc(pts, 1)
rrc_taps = gr.firdes.root_raised_cosine(1.0, 2.0, 1.0, 0.35, 91)
interp = gr.interp_fir_filter_ccc(2, (rrc_taps))
sink = gr.vector_sink_c()
tb = gr.top_block()
tb.connect(src, unpack, pack, bts, mapper, interp, sink)
tb.run()
return sink.data()
def mod_bits_qpsk(strbits, syms=[0,1,3,2], pts=[-1,1j,1,-1j]):
src = gr.vector_source_b(es.string_to_vector(strbits));
unpack = gr.packed_to_unpacked_bb(1, gr.GR_MSB_FIRST);
pack = gr.pack_k_bits_bb(2);
bts = gr.map_bb((syms));
mapper = gr.chunks_to_symbols_bc(pts, 1);
rrc_taps = gr.firdes.root_raised_cosine(1.0, 2.0, 1.0, 0.35, 91);
interp = gr.interp_fir_filter_ccc(2, (rrc_taps))
sink = gr.vector_sink_c();
tb=gr.top_block();
tb.connect(src,unpack,pack,bts,mapper,interp,sink);
tb.run();
return sink.data();
def __init__(self, EbN0):
gr.top_block.__init__(self)
self.const = digital.qpsk_constellation()
# Source is N_BITS bits, non-repeated
data = map(int, numpy.random.randint(0, self.const.arity(), N_BITS/self.const.bits_per_symbol()))
src = gr.vector_source_b(data, False)
mod = gr.chunks_to_symbols_bc((self.const.points()), 1)
add = gr.add_vcc()
noise = gr.noise_source_c(gr.GR_GAUSSIAN,
self.EbN0_to_noise_voltage(EbN0),
RAND_SEED)
demod = digital.constellation_decoder_cb(self.const.base())
ber = BitErrors(self.const.bits_per_symbol())
self.sink = gr.vector_sink_f()
self.connect(src, mod, add, demod, ber, self.sink)
self.connect(noise, (add, 1))
self.connect(src, (ber, 1))
def __init__(self, EbN0):
gr.top_block.__init__(self)
self.const = digital.qpsk_constellation()
# Source is N_BITS bits, non-repeated
data = map(
int,
numpy.random.randint(0, self.const.arity(),
N_BITS / self.const.bits_per_symbol()))
src = gr.vector_source_b(data, False)
mod = gr.chunks_to_symbols_bc((self.const.points()), 1)
add = gr.add_vcc()
noise = gr.noise_source_c(gr.GR_GAUSSIAN,
self.EbN0_to_noise_voltage(EbN0), RAND_SEED)
demod = digital.constellation_decoder_cb(self.const.base())
ber = BitErrors(self.const.bits_per_symbol())
self.sink = gr.vector_sink_f()
self.connect(src, mod, add, demod, ber, self.sink)
self.connect(noise, (add, 1))
self.connect(src, (ber, 1))
def __init__(self, sample_rate, symbol_rate): gr.hier_block2.__init__(self, "dvb_s_modulator_bc", gr.io_signature(1, 1, gr.sizeof_char), # Input signature gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature samples_per_symbol = sample_rate / symbol_rate if samples_per_symbol < 2: raise TypeError, "Samples per symbol must be >= 2" # Form symbols with 2 bits per symbol self.pack = gr.unpacked_to_packed_bb(1, gr.GR_MSB_FIRST) self.reunpack = gr.packed_to_unpacked_bb(2, gr.GR_MSB_FIRST) self.mapper = gr.chunks_to_symbols_bc(mod_constellation) # Design FIR filter taps for square root raised cosine filter ntaps = 11 * int(samples_per_symbol * nfilts) rrc_taps = gr.firdes.root_raised_cosine(nfilts, nfilts, 1.0, dvb_swig.RRC_ROLLOFF_FACTOR, ntaps) # Baseband pulse shaping filter self.rrc_filter = gr.pfb_arb_resampler_ccf(samples_per_symbol, rrc_taps) self.connect(self, self.pack, self.reunpack, self.mapper, self.rrc_filter, self)
def __init__(self, fg, spb, alpha, gain, use_barker=0):
if not isinstance(spb, int) or spb < 2:
raise TypeError, "sbp must be an integer >= 2"
self.spb = spb
self.bits_per_chunk = 1
ntaps = 2 * spb - 1
alpha = 0.5
self.bytes2chunks = gr.packed_to_unpacked_bb(self.bits_per_chunk,
gr.GR_MSB_FIRST)
constellation = ( (), ( -1-0j,1+0j ), ( 0.707+0.707j,-0.707-0.707j ),
( 0.707+0j,-0.707-0.707j ), ( -1+0j,-1j, 1j, 1+0j ),
( 1+0j,0+1j,-1+0j,0-1j ), ( 0+0j,1+0j ) )
self.chunks2symbols = gr.chunks_to_symbols_bc(constellation[2])
self.scrambler = bbn.scrambler_bb(True)
self.diff_encode = gr.diff_encoder_bb(2);
self.barker_taps = bbn.firdes_barker(spb)
self.rrc_taps = gr.firdes.root_raised_cosine(4 * gain, spb,
1.0, alpha, ntaps)
if use_barker:
self.tx_filter = gr.interp_fir_filter_ccf(spb, self.barker_taps)
else:
self.tx_filter = gr.interp_fir_filter_ccf(spb, self.rrc_taps)
fg.connect(self.scrambler, self.bytes2chunks)
fg.connect(self.bytes2chunks, self.diff_encode)
fg.connect(self.diff_encode, self.chunks2symbols)
fg.connect(self.chunks2symbols,self.tx_filter)
gr.hier_block.__init__(self, fg, self.scrambler, self.tx_filter)
bbn.crc16_init()
def __init__(self, sps, excess_bw, amplitude, vector_source):
try:
self.sps = 2
except KeyError:
pass
gr.hier_block2.__init__(self, "OQPSK Modulator",
gr.io_signature(0, 0, 0), # Input
gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output
if not isinstance(self.sps, int) or self.sps < 2:
raise TypeError, "sample per symbol sps ou spb must be an integer >= 2"
self.vector_source = vector_source
self.symbolsToChips = ucla.symbols_to_chips_bi()
self.chipsToSymbols = gr.packed_to_unpacked_ii(2, gr.GR_MSB_FIRST)
#self.symbolsToConstellation = gr.chunks_to_symbols_ic((-1-1j, -1+1j, 1-1j, 1+1j))
self.symbolsToConstellation = gr.chunks_to_symbols_bc((-1-1j, -1+1j, 1-1j, 1+1j))
#self._scrambler = gr.scrambler_bb(0x8A, 0x7F, 31) # CCSDS 7-bit scrambler
self.pskmod = ucla.qpsk_modulator_cc()
self.delay = ucla.delay_cc(self.sps)
self.amp = gr.multiply_const_cc(amplitude)
#self.connect(self.vector_source , self.symbolsToChips, self.chipsToSymbols, self.symbolsToConstellation, self.pskmod, self.delay, self.amp, self)
#self.connect(self.vector_source , self._scrambler, self.symbolsToConstellation, self.pskmod, self.delay, self.amp, self)
self.connect(self.vector_source, self.symbolsToConstellation, self.pskmod, self.delay, self.amp, self)
#self.connect(self, self.symbolsToChips, self.chipsToSymbols, self.symbolsToConstellation, self.pskmod, self)
def __init__(self,
samples_per_symbol=_def_samples_per_symbol,
excess_bw=_def_excess_bw,
gray_code=_def_gray_code,
verbose=_def_verbose,
log=_def_log):
"""
Hierarchical block for RRC-filtered differential BPSK modulation.
The input is a byte stream (unsigned char) and the
output is the complex modulated signal at baseband.
@param samples_per_symbol: samples per 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
"""
gr.hier_block2.__init__(self, "dbpsk_mod",
gr.io_signature(1, 1, gr.sizeof_char), # Input signature
gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature
self._samples_per_symbol = samples_per_symbol
self._excess_bw = excess_bw
self._gray_code = gray_code
if self._samples_per_symbol < 2:
raise TypeError, ("sbp must be an integer >= 2, is %d" % 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
nfilts = 32
ntaps = nfilts * 11 * int(self._samples_per_symbol) # make nfilts filters of ntaps each
self.rrc_taps = gr.firdes.root_raised_cosine(
nfilts, # gain
nfilts, # sampling rate based on 32 filters in resampler
1.0, # symbol rate
self._excess_bw, # excess bandwidth (roll-off factor)
ntaps)
self.rrc_filter = gr.pfb_arb_resampler_ccf(self._samples_per_symbol, self.rrc_taps)
# Connect
self.connect(self, self.bytes2chunks, self.symbol_mapper, self.diffenc,
self.chunks2symbols, self.rrc_filter, self)
if verbose:
self._print_verbage()
if log:
self._setup_logging()
def __init__(self, constellation,
samples_per_symbol=_def_samples_per_symbol,
differential=_def_differential,
excess_bw=_def_excess_bw,
gray_coded=True,
verbose=_def_verbose,
log=_def_log):
"""
Hierarchical block for RRC-filtered differential generic modulation.
The input is a byte stream (unsigned char) and the
output is the complex modulated signal at baseband.
@param constellation: determines the modulation type
@type constellation: gnuradio.digital.gr_constellation
@param samples_per_symbol: samples per baud >= 2
@type samples_per_symbol: float
@param excess_bw: Root-raised cosine filter excess bandwidth
@type excess_bw: float
@param gray_coded: turn gray coding on/off
@type gray_coded: bool
@param verbose: Print information about modulator?
@type verbose: bool
@param log: Log modulation data to files?
@type log: bool
"""
gr.hier_block2.__init__(self, "generic_mod",
gr.io_signature(1, 1, gr.sizeof_char), # Input signature
gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature
self._constellation = constellation.base()
self._samples_per_symbol = samples_per_symbol
self._excess_bw = excess_bw
self._differential = differential
if self._samples_per_symbol < 2:
raise TypeError, ("sbp must be >= 2, is %f" % 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 gray_coded == True:
self.symbol_mapper = gr.map_bb(self._constellation.pre_diff_code())
if differential:
self.diffenc = gr.diff_encoder_bb(arity)
self.chunks2symbols = gr.chunks_to_symbols_bc(self._constellation.points())
# pulse shaping filter
nfilts = 32
ntaps = nfilts * 11 * int(self._samples_per_symbol) # make nfilts filters of ntaps each
self.rrc_taps = gr.firdes.root_raised_cosine(
nfilts, # gain
nfilts, # sampling rate based on 32 filters in resampler
1.0, # symbol rate
self._excess_bw, # excess bandwidth (roll-off factor)
ntaps)
self.rrc_filter = gr.pfb_arb_resampler_ccf(self._samples_per_symbol,
self.rrc_taps)
# Connect
blocks = [self, self.bytes2chunks]
if gray_coded == True:
blocks.append(self.symbol_mapper)
if differential:
blocks.append(self.diffenc)
blocks += [self.chunks2symbols, self.rrc_filter, self]
self.connect(*blocks)
if verbose:
self._print_verbage()
if log:
self._setup_logging()
def __init__(self,
samples_per_symbol=_def_samples_per_symbol,
excess_bw=_def_excess_bw,
gray_code=_def_gray_code,
verbose=_def_verbose,
log=_def_log):
"""
Hierarchical block for RRC-filtered QPSK modulation.
The input is a byte stream (unsigned char) and the
output is the complex modulated signal at baseband.
@param samples_per_symbol: samples per symbol >= 2
@type samples_per_symbol: integer
@param excess_bw: Root-raised cosine filter excess bandwidth
@type excess_bw: float
@param gray_code: Tell modulator to Gray code the bits
@type gray_code: bool
@param verbose: Print information about modulator?
@type verbose: bool
@param debug: Print modualtion data to files?
@type debug: bool
"""
gr.hier_block2.__init__(
self,
"qam8_mod",
gr.io_signature(1, 1, gr.sizeof_char), # Input signature
gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature
self._samples_per_symbol = samples_per_symbol
self._excess_bw = excess_bw
self._gray_code = gray_code
if not isinstance(samples_per_symbol, int) or samples_per_symbol < 2:
raise TypeError, ("sbp must be an integer >= 2, is %d" %
samples_per_symbol)
ntaps = 11 * samples_per_symbol
arity = pow(2, self.bits_per_symbol())
# turn bytes into k-bit vectors
self.bytes2chunks = \
gr.packed_to_unpacked_bb(self.bits_per_symbol(), gr.GR_MSB_FIRST)
if self._gray_code:
self.symbol_mapper = gr.map_bb(qam.binary_to_gray[arity])
else:
self.symbol_mapper = gr.map_bb(qam.binary_to_ungray[arity])
self.diffenc = gr.diff_encoder_bb(arity)
rot = 1.0
print "constellation with %d arity" % arity
rotated_const = map(lambda pt: pt * rot, qam.constellation[arity])
self.chunks2symbols = gr.chunks_to_symbols_bc(rotated_const)
# pulse shaping filter
self.rrc_taps = gr.firdes.root_raised_cosine(
self.
_samples_per_symbol, # gain (sps since we're interpolating by sps)
self._samples_per_symbol, # sampling rate
1.0, # symbol rate
self._excess_bw, # excess bandwidth (roll-off factor)
ntaps)
self.rrc_filter = gr.interp_fir_filter_ccf(self._samples_per_symbol,
self.rrc_taps)
if verbose:
self._print_verbage()
if log:
self._setup_logging()
# Connect
self.connect(self, self.bytes2chunks, self.symbol_mapper, self.diffenc,
self.chunks2symbols, self.rrc_filter, self)
def __init__(self,
samples_per_symbol=_def_samples_per_symbol,
excess_bw=_def_excess_bw,
gray_code=_def_gray_code,
verbose=_def_verbose,
log=_def_log):
"""
Hierarchical block for RRC-filtered QPSK modulation.
The input is a byte stream (unsigned char) and the
output is the complex modulated signal at baseband.
@param samples_per_symbol: samples per symbol >= 2
@type samples_per_symbol: integer
@param excess_bw: Root-raised cosine filter excess bandwidth
@type excess_bw: float
@param gray_code: Tell modulator to Gray code the bits
@type gray_code: bool
@param verbose: Print information about modulator?
@type verbose: bool
@param debug: Print modualtion data to files?
@type debug: bool
"""
gr.hier_block2.__init__(self, "qam8_mod",
gr.io_signature(1, 1, gr.sizeof_char), # Input signature
gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature
self._samples_per_symbol = samples_per_symbol
self._excess_bw = excess_bw
self._gray_code = gray_code
if not isinstance(samples_per_symbol, int) or samples_per_symbol < 2:
raise TypeError, ("sbp must be an integer >= 2, is %d" % samples_per_symbol)
ntaps = 11 * samples_per_symbol
arity = pow(2, self.bits_per_symbol())
# turn bytes into k-bit vectors
self.bytes2chunks = \
gr.packed_to_unpacked_bb(self.bits_per_symbol(), gr.GR_MSB_FIRST)
if self._gray_code:
self.symbol_mapper = gr.map_bb(qam.binary_to_gray[arity])
else:
self.symbol_mapper = gr.map_bb(qam.binary_to_ungray[arity])
self.diffenc = gr.diff_encoder_bb(arity)
rot = 1.0
print "constellation with %d arity" % arity
rotated_const = map(lambda pt: pt * rot, qam.constellation[arity])
self.chunks2symbols = gr.chunks_to_symbols_bc(rotated_const)
# pulse shaping filter
self.rrc_taps = gr.firdes.root_raised_cosine(
self._samples_per_symbol, # gain (sps since we're interpolating by sps)
self._samples_per_symbol, # sampling rate
1.0, # symbol rate
self._excess_bw, # excess bandwidth (roll-off factor)
ntaps)
self.rrc_filter = gr.interp_fir_filter_ccf(self._samples_per_symbol, self.rrc_taps)
if verbose:
self._print_verbage()
if log:
self._setup_logging()
# Connect
self.connect(self, self.bytes2chunks, self.symbol_mapper, self.diffenc,
self.chunks2symbols, self.rrc_filter, self)
def __init__(self,
constellation,
samples_per_symbol=_def_samples_per_symbol,
differential=_def_differential,
excess_bw=_def_excess_bw,
gray_coded=True,
verbose=_def_verbose,
log=_def_log):
"""
Hierarchical block for RRC-filtered differential generic modulation.
The input is a byte stream (unsigned char) and the
output is the complex modulated signal at baseband.
@param constellation: determines the modulation type
@type constellation: gnuradio.digital.gr_constellation
@param samples_per_symbol: samples per baud >= 2
@type samples_per_symbol: float
@param excess_bw: Root-raised cosine filter excess bandwidth
@type excess_bw: float
@param gray_coded: turn gray coding on/off
@type gray_coded: bool
@param verbose: Print information about modulator?
@type verbose: bool
@param log: Log modulation data to files?
@type log: bool
"""
gr.hier_block2.__init__(
self,
"generic_mod",
gr.io_signature(1, 1, gr.sizeof_char), # Input signature
gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature
self._constellation = constellation.base()
self._samples_per_symbol = samples_per_symbol
self._excess_bw = excess_bw
self._differential = differential
if self._samples_per_symbol < 2:
raise TypeError, ("sbp must be >= 2, is %f" %
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 gray_coded == True:
self.symbol_mapper = gr.map_bb(self._constellation.pre_diff_code())
if differential:
self.diffenc = gr.diff_encoder_bb(arity)
self.chunks2symbols = gr.chunks_to_symbols_bc(
self._constellation.points())
# pulse shaping filter
nfilts = 32
ntaps = nfilts * 11 * int(
self._samples_per_symbol) # make nfilts filters of ntaps each
self.rrc_taps = gr.firdes.root_raised_cosine(
nfilts, # gain
nfilts, # sampling rate based on 32 filters in resampler
1.0, # symbol rate
self._excess_bw, # excess bandwidth (roll-off factor)
ntaps)
self.rrc_filter = gr.pfb_arb_resampler_ccf(self._samples_per_symbol,
self.rrc_taps)
# Connect
blocks = [self, self.bytes2chunks]
if gray_coded == True:
blocks.append(self.symbol_mapper)
if differential:
blocks.append(self.diffenc)
blocks += [self.chunks2symbols, self.rrc_filter, self]
self.connect(*blocks)
if verbose:
self._print_verbage()
if log:
self._setup_logging()
def __init__(self, gui, options):
gr.hier_block2.__init__(self, "bpsk_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 = options.sps
self.amplitude = options.amplitude
self.verbose = options.verbose
self._excess_bw = _def_excess_bw
self._gray_code = _def_gray_code
if not isinstance(self._samples_per_symbol, int) or self._samples_per_symbol < 2:
raise TypeError, ("sample per symbol must be an integer >= 2, is %d" % self._samples_per_symbol)
arity = pow(2,self.bits_per_symbol())
# turn bytes into k-bit vectors
self.packed_to_unpacked_bb = \
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.diff_encoder_bb = gr.diff_encoder_bb(arity)
#This bloc allow to decode the stream
#self.scrambler = gr.scrambler_bb(0x8A, 0x7F, 7)
#Transform symbols to chips
self.symbols_to_chips = ieee.symbols_to_chips_bs()
#self.chunks2symbols = gr.chunks_to_symbols_ic(psk.constellation[arity])
self.chunks2symbols = gr.chunks_to_symbols_sc([-1+0j, 1+0j])
self.chunks2symbols_b = gr.chunks_to_symbols_bc([-1+0j, 1+0j])
# transform chips to symbols
print "bits_per_symbol", self.bits_per_symbol()
self.packed_to_unpacked_ss = \
gr.packed_to_unpacked_ss(self.bits_per_symbol(), gr.GR_MSB_FIRST)
ntaps = 11 * self._samples_per_symbol
# pulse shaping filter
self.rrc_taps = gr.firdes.root_raised_cosine(
self._samples_per_symbol * self.amplitude, # 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
#self.connect(self, self.bytes2chunks, self.symbol_mapper,self.scrambler, self.chunks2symbols, self.rrc_filter, self)
# self.wxgui_constellationsink2_0 = constsink_gl.const_sink_c(
# gui.GetWin(),
# title="Constellation Plot",
# sample_rate=self._samples_per_symbol,
# frame_rate=5,
# const_size=2048,
# M=2,
# theta=0,
# alpha=0.005,
# fmax=0.06,
# mu=0.5,
# gain_mu=0.005,
# symbol_rate=self._samples_per_symbol/2,
# omega_limit=0.005,
# )
# gui.Add(self.wxgui_constellationsink2_0.win)
#Modefied for IEEE 802.15.4
#self.connect(self, self.packed_to_unpacked_bb, self.symbol_mapper, self.diff_encoder_bb, self.symbols_to_chips, self.packed_to_unpacked_ss, self.chunks2symbols, self.rrc_filter, self)
self.connect(self, self.packed_to_unpacked_bb, self.symbol_mapper, self.symbols_to_chips, self.packed_to_unpacked_ss, self.chunks2symbols, self.rrc_filter, self)
#self.connect(self, self.symbols_to_chips, self.packed_to_unpacked_ss, self.chunks2symbols, self.rrc_filter, self)
#self.connect(self, self.packed_to_unpacked_ss, self.chunks2symbols, self.rrc_filter, self)
#self.connect(self, self._scrambler, self.chunks2symbols_b, self.rrc_filter, self)
#self.connect(self.rrc_filter, self.wxgui_constellationsink2_0)
if self.verbose:
self._print_verbage()
def __init__(self,
samples_per_symbol=_def_samples_per_symbol,
excess_bw=_def_excess_bw,
verbose=_def_verbose,
log=_def_log):
"""
Hierarchical block for RRC-filtered QPSK modulation.
The input is a byte stream (unsigned char) and the
output is the complex modulated signal at baseband.
@param samples_per_symbol: samples per symbol >= 2
@type samples_per_symbol: integer
@param excess_bw: Root-raised cosine filter excess bandwidth
@type excess_bw: float
@param verbose: Print information about modulator?
@type verbose: bool
@param debug: Print modualtion data to files?
@type debug: bool
"""
gr.hier_block2.__init__(self, "cqpsk_mod",
gr.io_signature(1, 1, gr.sizeof_char), # Input signature
gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature
self._samples_per_symbol = samples_per_symbol
self._excess_bw = excess_bw
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 = 8
# turn bytes into k-bit vectors
self.bytes2chunks = \
gr.packed_to_unpacked_bb(self.bits_per_symbol(), gr.GR_MSB_FIRST)
# 0 +45 1 [+1]
# 1 +135 3 [+3]
# 2 -45 7 [-1]
# 3 -135 5 [-3]
self.pi4map = [1, 3, 7, 5]
self.symbol_mapper = gr.map_bb(self.pi4map)
self.diffenc = gr.diff_encoder_bb(arity)
self.chunks2symbols = gr.chunks_to_symbols_bc(psk.constellation[arity])
# pulse shaping filter
self.rrc_taps = 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 = filter.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.connect(self, self.bytes2chunks, self.symbol_mapper, self.diffenc,
self.chunks2symbols, self.rrc_filter, self)
def __init__(self, fg, spb, alpha, gain, use_barker=0):
"""
Hierarchical block for RRC-filtered PSK modulation
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 alpha: Root-raised cosine filter excess bandwidth
@type alpha: float
"""
if not isinstance(spb, int) or spb < 2:
raise TypeError, "sbp must be an integer >= 2"
self.spb = spb
self.bits_per_chunk = 1
ntaps = 2 * spb - 1
alpha = 0.5
# turn bytes into symbols
self.bytes2chunks = gr.packed_to_unpacked_bb(self.bits_per_chunk,
gr.GR_MSB_FIRST)
constellation = ( (),
( -1-0j,1+0j ),
( 0.707+0.707j,-0.707-0.707j ),
( 0.707+0j,-0.707-0.707j ),
( -1+0j,-1j, 1j, 1+0j),
( 1+0j,0+1j,-1+0j,0-1j ),
( 0+0j,1+0j ),
)
self.chunks2symbols = gr.chunks_to_symbols_bc(constellation[2])
self.scrambler = bbn.scrambler_bb(True)
self.diff_encode = gr.diff_encoder_bb(2);
self.barker_taps = bbn.firdes_barker(spb)
# Form Raised Cosine filter
self.rrc_taps = gr.firdes.root_raised_cosine(
4 * gain, # gain FIXME may need to be spb
spb, # sampling freq
1.0, # symbol_rate
alpha,
ntaps)
if use_barker:
self.tx_filter = gr.interp_fir_filter_ccf(spb, self.barker_taps)
else:
self.tx_filter = gr.interp_fir_filter_ccf(spb, self.rrc_taps)
# Connect
fg.connect(self.scrambler, self.bytes2chunks)
fg.connect(self.bytes2chunks, self.diff_encode)
fg.connect(self.diff_encode, self.chunks2symbols)
fg.connect(self.chunks2symbols,self.tx_filter)
# Initialize base class
gr.hier_block.__init__(self, fg, self.scrambler, self.tx_filter)
bbn.crc16_init()
def __init__(self, principal_gui, options):
gr.hier_block2.__init__(self, "bpsk_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 = options.sps
self.amplitude = options.amplitude
self.verbose = options.verbose
self._excess_bw = _def_excess_bw
self._gray_code = _def_gray_code
if not isinstance(self._samples_per_symbol, int) or self._samples_per_symbol < 2:
raise TypeError, ("sample per symbol must be an integer >= 2, is %d" % self._samples_per_symbol)
arity = pow(2,self.bits_per_symbol())
#arity = pow (2, 2)
# turn bytes into k-bit vectors
self.packed_to_unpacked_bb = \
gr.packed_to_unpacked_bb(self.bits_per_symbol(), gr.GR_MSB_FIRST)
if self._gray_code:
map_param = psk.binary_to_gray[arity]
self.symbol_mapper = gr.map_bb(map_param)
else:
self.symbol_mapper = gr.map_bb(psk.binary_to_ungray[arity])
self.diff_encoder_bb = gr.diff_encoder_bb(arity)
#This bloc allow to decode the stream
#self.scrambler = gr.scrambler_bb(0x8A, 0x7F, 7)
#Transform symbols to chips
self.symbols_to_chips = ieee.symbols_to_chips_bs()
#self.chunks2symbols = gr.chunks_to_symbols_ic(psk.constellation[arity])
self.chunks2symbols = gr.chunks_to_symbols_sc([-1+0j, 1+0j])
self.chunks2symbols_b = gr.chunks_to_symbols_bc([-1+0j, 1+0j])
# transform chips to symbols
print "bits_per_symbol", self.bits_per_symbol()
self.packed_to_unpacked_ss = \
gr.packed_to_unpacked_ss(self.bits_per_symbol(), gr.GR_MSB_FIRST)
ntaps = 11 * self._samples_per_symbol
# 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
#self.connect(self, self.bytes2chunks, self.symbol_mapper,self.scrambler, self.chunks2symbols, self.rrc_filter, self)
#Modefied for IEEE 802.15.4
#self.connect(self, self.packed_to_unpacked_bb, self.symbol_mapper, self.diff_encoder_bb, self.symbols_to_chips, self.packed_to_unpacked_ss, self.chunks2symbols, self.rrc_filter, self)
#For IEEE 802.15.4 915 868 MHz standard
self.connect(self, self.packed_to_unpacked_bb, self.symbol_mapper, self.symbols_to_chips, self.packed_to_unpacked_ss, self.chunks2symbols, self.rrc_filter, self)
#self.connect(self, self.symbols_to_chips, self.packed_to_unpacked_ss, self.chunks2symbols, self.rrc_filter, self)
#self.connect(self, self.packed_to_unpacked_ss, self.chunks2symbols, self.rrc_filter, self)
#case when we use a stream of bits
#self.connect(self, self.chunks2symbols_b, self.rrc_filter, self)
if self.verbose:
self._print_verbage()
def __init__(self,
samples_per_symbol=_def_samples_per_symbol,
excess_bw=_def_excess_bw,
gray_code=_def_gray_code,
verbose=_def_verbose,
log=_def_log):
"""
Hierarchical block for RRC-filtered QPSK modulation.
The input is a byte stream (unsigned char) and the
output is the complex modulated signal at baseband.
@param samples_per_symbol: samples per symbol >= 2
@type samples_per_symbol: integer
@param excess_bw: Root-raised cosine filter excess bandwidth
@type excess_bw: float
@param gray_code: Tell modulator to Gray code the bits
@type gray_code: bool
@param verbose: Print information about modulator?
@type verbose: bool
@param debug: Print modualtion data to files?
@type debug: bool
"""
gr.hier_block2.__init__(
self,
"dqpsk2_mod",
gr.io_signature(1, 1, gr.sizeof_char), # Input signature
gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature
self._samples_per_symbol = samples_per_symbol
self._excess_bw = excess_bw
self._gray_code = gray_code
if samples_per_symbol < 2:
raise TypeError, ("sbp must be >= 2, is %f" % 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
nfilts = 32
ntaps = 11 * int(
nfilts *
self._samples_per_symbol) # make nfilts filters of ntaps each
self.rrc_taps = gr.firdes.root_raised_cosine(
nfilts, # gain
nfilts, # sampling rate based on 32 filters in resampler
1.0, # symbol rate
self._excess_bw, # excess bandwidth (roll-off factor)
ntaps)
self.rrc_filter = gr.pfb_arb_resampler_ccf(self._samples_per_symbol,
self.rrc_taps)
if verbose:
self._print_verbage()
if log:
self._setup_logging()
# Connect & Initialize base class
self.connect(self, self.bytes2chunks, self.symbol_mapper, self.diffenc,
self.chunks2symbols, self.rrc_filter, self)
def __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)