def __init__(self, sample_rate, freq_offset, queue, logger = None, group_description_csv = None):
gr.hier_block2.__init__(
self,
"SmartZone Control Channel",
gr.io_signature(1, 1, gr.sizeof_gr_complex), # input signature
gr.io_signature(0, 0, 0) # output signature
)
self._CC_DEVIATION = 4e3 # observed
self._symbol_rate = 3600.0 # control channel rate is 3.6kb/s
self._oversample = 4 # XXX reduce
# get close to the desired sample rate with decimation
channel_decimation = int(sample_rate / (self._oversample * self._symbol_rate)) & ~1
channel_rate = sample_rate / channel_decimation
samples_per_symbol = channel_rate / self._symbol_rate
# channel_bw = self._CC_DEVIATION + self._symbol_rate # from pager source
channel_bw = 3 * self._symbol_rate
# taps = firdes.low_pass(1, sample_rate, int(3.0 * self._symbol_rate), int(3.0 * self._symbol_rate / 10.0), firdes.WIN_HAMMING)
channel_taps = firdes.low_pass(1, sample_rate, channel_bw, channel_bw / 10.0, firdes.WIN_HAMMING)
channel_filter = filter.freq_xlating_fir_filter_ccf(channel_decimation, channel_taps, freq_offset, sample_rate)
#quad_demod = analog.quadrature_demod_cf(1.0)
quad_demod = analog.quadrature_demod_cf(channel_rate / (2 * math.pi * self._CC_DEVIATION))
clock = digital.clock_recovery_mm_ff(omega = samples_per_symbol, gain_omega = 0.001, mu = 0, gain_mu = 0.001, omega_relative_limit = 0.005)
slicer = digital.binary_slicer_fb()
digital_correlate = digital.correlate_access_code_bb("10101100", 0)
cc_sink = control_channel_sink(logger, queue, group_description_csv)
self.connect(self, channel_filter, quad_demod, clock, slicer, digital_correlate, cc_sink)
def __init__(self, samp_rate):
gr.hier_block2.__init__(
self,
"APRS demod",
gr.io_signature(1, 1, gr.sizeof_float),
gr.io_signature(0, 0, 0),
)
self.message_port_register_hier_out("out")
self.samp_rate = samp_rate
self.bit_rate = 1200
taps = firdes.low_pass(1, self.samp_rate, 1200, 200)
self.afsk_shift = filter.freq_xlating_fir_filter_fcc(
1, taps, (1200 + 2200) / 2, self.samp_rate)
self.afsk_demod = analog.quadrature_demod_cf(
1.0) # Don't care about gain just before binary slicer
self.threashold = digital.binary_slicer_fb()
self.clock_rec = igate.clock_recovery_timer_bb(self.samp_rate /
self.bit_rate)
self.diff_decode = digital.diff_decoder_bb(2)
self.negate = digital.map_bb(([1, 0]))
self.packetizer = digital.hdlc_deframer_bp(16, 1024)
self.parser = igate.aprs_decode_frame()
self.connect((self, 0), (self.afsk_shift, 0))
self.connect((self.afsk_shift, 0), (self.afsk_demod, 0))
self.connect((self.afsk_demod, 0), (self.threashold, 0))
self.connect((self.threashold, 0), (self.clock_rec, 0))
self.connect((self.clock_rec, 0), (self.diff_decode, 0))
self.connect((self.diff_decode, 0), (self.negate, 0))
self.connect((self.negate, 0), (self.packetizer, 0))
self.msg_connect((self.packetizer, 'out'), (self.parser, 'in'))
self.msg_connect((self.parser, 'out'), (self, 'out'))
def __init__(self, mode, syncword_threshold=None, options=None):
gr.hier_block2.__init__(self, "ax100_deframer",
gr.io_signature(1, 1, gr.sizeof_float),
gr.io_signature(0, 0, 0))
options_block.__init__(self, options)
self.message_port_register_hier_out('out')
if syncword_threshold is None:
syncword_threshold = self.options.syncword_threshold
if mode not in ['RS', 'ASM']:
raise Exception("Unsupported AX100 mode. Use 'RS' or 'ASM'")
self.slicer = digital.binary_slicer_fb()
if mode == 'RS':
self.descrambler = digital.descrambler_bb(0x21, 0, 16)
self.deframer = sync_to_pdu_packed(packlen = 256 if mode == 'RS' else 255,\
sync = _syncword,\
threshold = syncword_threshold)
self.fec = ax100_decode(self.options.verbose_fec) if mode == 'RS'\
else u482c_decode(self.options.verbose_fec, 0, 1, 1)
self._blocks = [self, self.slicer]
if mode == 'RS':
self._blocks.append(self.descrambler)
self._blocks += [self.deframer]
self.connect(*self._blocks)
self.msg_connect((self.deframer, 'out'), (self.fec, 'in'))
self.msg_connect((self.fec, 'out'), (self, 'out'))
def __init__(self,
frame_size=223,
differential=False,
dual_basis=False,
syncword_threshold=None,
options=None):
gr.hier_block2.__init__(self, "ccsds_rs_deframer",
gr.io_signature(1, 1, gr.sizeof_float),
gr.io_signature(0, 0, 0))
options_block.__init__(self, options)
self.message_port_register_hier_out('out')
if syncword_threshold is None:
syncword_threshold = self.options.syncword_threshold
self.slicer = digital.binary_slicer_fb()
if differential:
self.differential = digital.diff_decoder_bb(2)
self.deframer = sync_to_pdu(packlen = (frame_size + 32) * 8,\
sync = _syncword,\
threshold = syncword_threshold)
self.scrambler = ccsds_descrambler()
self.fec = decode_rs(self.options.verbose_rs, 1 if dual_basis else 0)
self._blocks = [self, self.slicer]
if differential:
self._blocks.append(self.differential)
self._blocks += [self.deframer]
self.connect(*self._blocks)
self.msg_connect((self.deframer, 'out'), (self.scrambler, 'in'))
self.msg_connect((self.scrambler, 'out'), (self.fec, 'in'))
self.msg_connect((self.fec, 'out'), (self, 'out'))
def __init__(self, options):
gr.hier_block2.__init__(self, "ais_demod",
gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature
gr.io_signature(1, 1, gr.sizeof_char)) # Output signature
self._samples_per_symbol = options[ "samples_per_symbol" ]
self._bits_per_sec = options[ "bits_per_sec" ]
self._samplerate = self._samples_per_symbol * self._bits_per_sec
self._clockrec_gain = options[ "clockrec_gain" ]
self._omega_relative_limit = options[ "omega_relative_limit" ]
self.fftlen = options[ "fftlen" ]
self.freq_sync = gmsk_sync.square_and_fft_sync_cc(self._samplerate, self._bits_per_sec, self.fftlen)
self.agc = analog.feedforward_agc_cc(512, 2)
self.preamble = [1,1,0,0]*7
self.mod = digital.gmsk_mod(self._samples_per_symbol, 0.4)
self.mod_vector = ais.modulate_vector_bc(self.mod.to_basic_block(), self.preamble, [1])
self.preamble_detect = ais.corr_est_cc(self.mod_vector,
self._samples_per_symbol,
1, #mark delay
0.9) #threshold
self.clockrec = ais.msk_timing_recovery_cc(self._samples_per_symbol,
self._clockrec_gain, #gain
self._omega_relative_limit, #error lim
1) #output sps
sensitivity = (math.pi / 2)
self.demod = analog.quadrature_demod_cf(sensitivity) #param is gain
self.slicer = digital.binary_slicer_fb()
self.diff = digital.diff_decoder_bb(2)
self.invert = ais.invert() #NRZI signal diff decoded and inverted should give original signal
# self.connect(self, self.gmsk_sync)
self.connect(self, self.freq_sync, self.agc, (self.preamble_detect, 0), self.clockrec, self.demod, self.slicer, self.diff, self.invert, self)
def __init__(self, baudrate=1200, host_address='127.0.0.1', host_port=7355, output_file="/tmp/rx_data.bin", samp_rate=48000):
gr.top_block.__init__(self, "Udp Decoder")
##################################################
# Parameters
##################################################
self.baudrate = baudrate
self.host_address = host_address
self.host_port = host_port
self.output_file = output_file
self.samp_rate = samp_rate
##################################################
# Blocks
##################################################
self.digital_clock_recovery_mm_xx_0 = digital.clock_recovery_mm_ff(samp_rate/baudrate, 0.001, 0, 0.25, 0.001)
self.digital_binary_slicer_fb_0 = digital.binary_slicer_fb()
self.blocks_udp_source_0 = blocks.udp_source(gr.sizeof_short*1, host_address, host_port, 1472, True)
self.blocks_short_to_float_0 = blocks.short_to_float(1, 32767)
self.blocks_file_sink_0 = blocks.file_sink(gr.sizeof_char*1, output_file, False)
self.blocks_file_sink_0.set_unbuffered(False)
##################################################
# Connections
##################################################
self.connect((self.blocks_short_to_float_0, 0), (self.digital_clock_recovery_mm_xx_0, 0))
self.connect((self.blocks_udp_source_0, 0), (self.blocks_short_to_float_0, 0))
self.connect((self.digital_binary_slicer_fb_0, 0), (self.blocks_file_sink_0, 0))
self.connect((self.digital_clock_recovery_mm_xx_0, 0), (self.digital_binary_slicer_fb_0, 0))
def __init__(self, options=None):
gr.hier_block2.__init__(
self,
'ax5043_deframer',
gr.io_signature(1, 1, gr.sizeof_float),
gr.io_signature(0, 0, 0))
options_block.__init__(self, options)
self.message_port_register_hier_out('out')
self.slicer = digital.binary_slicer_fb()
# 4000 bits will leave enough room for the 200 byte packets
self.deframer = sync_to_pdu(
packlen=4000, sync=_syncword, threshold=4)
self.deinterleave = deinterleave()
self.viterbi = viterbi_decoder(5, [25, 23])
self.pdu2tag = blocks.pdu_to_tagged_stream(byte_t, 'packet_len')
self.hdlc = hdlc_deframer(True, 10000, crc_check_func=crc_check)
self.connect(self, self.slicer, self.deframer)
self.msg_connect((self.deframer, 'out'), (self.deinterleave, 'in'))
self.msg_connect((self.deinterleave, 'out'), (self.viterbi, 'in'))
self.msg_connect((self.viterbi, 'out'), (self.pdu2tag, 'pdus'))
self.connect(self.pdu2tag, self.hdlc)
self.msg_connect((self.hdlc, 'out'), (self, 'out'))
def __init__(self,
new_protocol=False,
syncword_threshold=None,
options=None):
gr.hier_block2.__init__(self, "smogp_signalling_deframer",
gr.io_signature(1, 1, gr.sizeof_float),
gr.io_signature(0, 0, 0))
options_block.__init__(self, options)
self.message_port_register_hier_out('out')
if syncword_threshold is None:
syncword_threshold = self.options.signalling_syncword_threshold
self.slicer = digital.binary_slicer_fb()
self.deframer = sync_to_pdu_packed(packlen = 64,\
sync = _syncword,\
threshold = syncword_threshold)
if new_protocol:
self.deframer_tx = sync_to_pdu_packed(packlen = 64,\
sync = _syncword_tx,\
threshold = syncword_threshold)
self.connect(self, self.slicer, self.deframer)
self.msg_connect((self.deframer, 'out'), (self, 'out'))
if new_protocol:
self.connect(self.slicer, self.deframer_tx)
self.msg_connect((self.deframer_tx, 'out'), (self, 'out'))
def __init__(self,
if_rate=None,
filter_type=None,
excess_bw=_def_excess_bw,
symbol_rate=_def_symbol_rate):
"""
Hierarchical block for P25 demodulation base class
@param if_rate: sample rate of complex input channel
@type if_rate: int
"""
self.if_rate = if_rate
self.symbol_rate = symbol_rate
self.bb_sink = None
self.null_sink = blocks.null_sink(gr.sizeof_float)
self.baseband_amp = blocks.multiply_const_ff(_def_bb_gain)
coeffs = op25_c4fm_mod.c4fm_taps(
sample_rate=self.if_rate,
span=9,
generator=op25_c4fm_mod.transfer_function_rx).generate()
sps = self.if_rate / 4800
if filter_type == 'rrc':
ntaps = 7 * sps
if ntaps & 1 == 0:
ntaps += 1
coeffs = filter.firdes.root_raised_cosine(1.0, if_rate,
symbol_rate, excess_bw,
ntaps)
if filter_type == 'gmsk':
# lifted from gmsk.py
_omega = sps
_gain_mu = _def_gmsk_mu
_mu = _def_mu
if not _gain_mu:
_gain_mu = 0.175
_gain_omega = .25 * _gain_mu * _gain_mu # critically damped
self.symbol_filter = blocks.multiply_const_ff(1.0)
self.fsk4_demod = digital.clock_recovery_mm_ff(
_omega, _gain_omega, _mu, _gain_mu, _def_omega_relative_limit)
self.slicer = digital.binary_slicer_fb()
elif filter_type == 'fsk4mm':
self.symbol_filter = filter.fir_filter_fff(1, coeffs)
_omega = sps
_gain_mu = _def_gmsk_mu
_mu = _def_mu
if not _gain_mu:
_gain_mu = 0.0175
_gain_omega = .25 * _gain_mu * _gain_mu # critically damped
self.fsk4_demod = digital.clock_recovery_mm_ff(
_omega, _gain_omega, _mu, _gain_mu, _def_omega_relative_limit)
levels = [-2.0, 0.0, 2.0, 4.0]
self.slicer = op25_repeater.fsk4_slicer_fb(levels)
else:
self.symbol_filter = filter.fir_filter_fff(1, coeffs)
autotuneq = gr.msg_queue(2)
self.fsk4_demod = op25.fsk4_demod_ff(autotuneq, self.if_rate,
self.symbol_rate)
levels = [-2.0, 0.0, 2.0, 4.0]
self.slicer = op25_repeater.fsk4_slicer_fb(levels)
def __init__(self, syncword_threshold=None, options=None):
gr.hier_block2.__init__(self, "reaktor_hello_world_deframer",
gr.io_signature(1, 1, gr.sizeof_float),
gr.io_signature(0, 0, 0))
options_block.__init__(self, options)
self.message_port_register_hier_out('out')
if syncword_threshold is None:
syncword_threshold = self.options.syncword_threshold
self.slicer = digital.binary_slicer_fb()
self.deframer = sync_to_pdu_packed(packlen = 255,\
sync = _syncword,\
threshold = syncword_threshold)
self.scrambler = pn9_scrambler()
self.crop = cc11xx_packet_crop(True)
self.crc = check_cc11xx_crc(self.options.verbose_crc)
self.crop2 = cc11xx_remove_length()
self.connect(self, self.slicer, self.deframer)
self.msg_connect((self.deframer, 'out'), (self.scrambler, 'in'))
self.msg_connect((self.scrambler, 'out'), (self.crop, 'in'))
self.msg_connect((self.crop, 'out'), (self.crc, 'in'))
self.msg_connect((self.crc, 'ok'), (self.crop2, 'in'))
self.msg_connect((self.crop2, 'out'), (self, 'out'))
def __init__(self, dc_block_len=1000, samp_per_sym=10, rx_bit_inv=1): gr.hier_block2.__init__( self, "GMSK Demodulator", gr.io_signature(1, 1, gr.sizeof_float*1), gr.io_signature(1, 1, gr.sizeof_char*1), ) ################################################## # Parameters ################################################## self.dc_block_len = dc_block_len self.samp_per_sym = samp_per_sym self.rx_bit_inv = rx_bit_inv ################################################## # Variables ################################################## self.samp_rate = samp_rate = 48000 ################################################## # Blocks ################################################## self.digital_clock_recovery_mm_xx_0_0 = digital.clock_recovery_mm_ff(samp_per_sym*(1+0.0), 0.25*0.175*0.175, 0.5, 0.175, 0.005) self.digital_binary_slicer_fb_0_0 = digital.binary_slicer_fb() self.dc_blocker_xx_0 = filter.dc_blocker_ff(dc_block_len, False) self.blocks_multiply_const_vxx_0_0 = blocks.multiply_const_vff((rx_bit_inv, )) ################################################## # Connections ################################################## self.connect((self.dc_blocker_xx_0, 0), (self.blocks_multiply_const_vxx_0_0, 0)) self.connect((self.digital_clock_recovery_mm_xx_0_0, 0), (self.digital_binary_slicer_fb_0_0, 0)) self.connect((self.blocks_multiply_const_vxx_0_0, 0), (self.digital_clock_recovery_mm_xx_0_0, 0)) self.connect((self.digital_binary_slicer_fb_0_0, 0), (self, 0)) self.connect((self, 0), (self.dc_blocker_xx_0, 0))
def __init__(self, ebn0, nbits):
gr.hier_block2.__init__(self, 'FSK',
gr.io_signature(1, 1, gr.sizeof_char),
gr.io_signature(1, 1, gr.sizeof_char))
samp_rate = 48e3
sps = 5
deviation = 5000
bt = 1.0
self.head = blocks.head(gr.sizeof_char, nbits)
self.pack = blocks.pack_k_bits_bb(8)
self.modulator = digital.gfsk_mod(
samples_per_symbol = sps,
sensitivity = 2*np.pi*deviation/samp_rate,
bt = bt,
verbose = False,
log = False)
spb = sps
self.channel = channels.channel_model(np.sqrt(spb)/10**(ebn0/20), 0, 1.0, [1], RAND_SEED, False)
self.demod = fsk_demodulator(samp_rate/sps, samp_rate, deviation = deviation, iq = True)
self.slice = digital.binary_slicer_fb()
self.connect(self, self.head, self.pack, self.modulator, self.channel,
self.demod, self.slice, self)
def set_decoder(self, chan, num):
print("Add decoder for channel %d" % num)
decoder = btbr.btdecode(num)
# Both methods are quite equivalent
if 1:
quad_demod = analog.quadrature_demod_cf(self.samp_per_sym /
(2 * math.pi))
clock_recov = digital.clock_recovery_mm_ff(
omega=self.samp_per_sym,
gain_omega=0.25 * self.gain_mu**2,
mu=0.32,
gain_mu=self.gain_mu,
omega_relative_limit=0.005)
binary_slicer = digital.binary_slicer_fb()
self.connect(chan, quad_demod)
self.connect(quad_demod, clock_recov)
self.connect(clock_recov, binary_slicer)
self.connect(binary_slicer, decoder)
self.msg_connect((decoder, 'out'), (self.bthandler, 'in'))
else:
gfsk_demod = digital.gfsk_demod(
samples_per_symbol=self.samp_per_sym,
sensitivity=2 * math.pi / self.samp_per_sym,
gain_mu=self.gain_mu,
mu=0.32,
omega_relative_limit=0.005,
freq_error=0.0,
verbose=False,
log=False,
)
self.connect(chan, gfsk_demod)
self.connect(gfsk_demod, decoder)
self.msg_connect((decoder, 'out'), (self.bthandler, 'in'))
def __init__(self, dc_block_len=4, rx_gain=40):
gr.top_block.__init__(self, "Uhd Adsb 6")
##################################################
# Parameters
##################################################
self.dc_block_len = dc_block_len
self.rx_gain = rx_gain
##################################################
# Variables
##################################################
self.samp_rate = samp_rate = 2e6
self.freq = freq = 1090e6
self.filename = filename = "./bytes_" + str(dc_block_len) + ".csv"
##################################################
# Message Queues
##################################################
adsb_decoder_0_msgq_out = blocks_message_source_0_msgq_in = gr.msg_queue(
2)
adsb_framer_0_msgq_out = adsb_decoder_0_msgq_in = gr.msg_queue(2)
##################################################
# Blocks
##################################################
self.digital_correlate_access_code_tag_bb_0 = digital.correlate_access_code_tag_bb(
'1010000101000000', 0, 'adsb_preamble')
self.digital_binary_slicer_fb_0 = digital.binary_slicer_fb()
self.dc_blocker_xx_0 = filter.dc_blocker_ff(dc_block_len, True)
self.blocks_message_source_0 = blocks.message_source(
gr.sizeof_char * 1, blocks_message_source_0_msgq_in)
self.blocks_file_source_0 = blocks.file_source(
gr.sizeof_gr_complex * 1,
'/home/leffke/sandbox/adsb/adsb_20161212_2M_2.32fc', False)
self.blocks_file_sink_0 = blocks.file_sink(gr.sizeof_char * 1,
filename, True)
self.blocks_file_sink_0.set_unbuffered(True)
self.blocks_complex_to_mag_squared_0 = blocks.complex_to_mag_squared(1)
self.adsb_framer_0 = adsb.framer(tx_msgq=adsb_framer_0_msgq_out)
self.adsb_decoder_0 = adsb.decoder(rx_msgq=adsb_decoder_0_msgq_in,
tx_msgq=adsb_decoder_0_msgq_out,
output_type="csv",
check_parity=True)
##################################################
# Connections
##################################################
self.connect((self.blocks_complex_to_mag_squared_0, 0),
(self.dc_blocker_xx_0, 0))
self.connect((self.blocks_file_source_0, 0),
(self.blocks_complex_to_mag_squared_0, 0))
self.connect((self.blocks_message_source_0, 0),
(self.blocks_file_sink_0, 0))
self.connect((self.dc_blocker_xx_0, 0),
(self.digital_binary_slicer_fb_0, 0))
self.connect((self.digital_binary_slicer_fb_0, 0),
(self.digital_correlate_access_code_tag_bb_0, 0))
self.connect((self.digital_correlate_access_code_tag_bb_0, 0),
(self.adsb_framer_0, 0))
def __init__(self):
gr.top_block.__init__(self)
self.samp_rate = samp_rate = 1000000
self.dump_freq = dump_freq = 2400490000
self._u = uhd.usrp_source(
device_addr="%default",
io_type=uhd.io_type.COMPLEX_FLOAT32,
num_channels=1)
self._u.set_gain(0, 0)
self._u.set_samp_rate(self.samp_rate)
treq = uhd.tune_request(self.dump_freq, 0)
tr = self._u.set_center_freq(treq)
if tr == None:
sys.stderr.write('Failed to set center frequency\n')
raise SystemExit, 1
self.filter1 = gr.interp_fir_filter_ccf(1, firdes.low_pass(1, samp_rate, 500000, 10000, firdes.WIN_HAMMING, 6.76))
self.squelch = gr.pwr_squelch_cc(-100, 0.001, 0, True)
self.demod = gr.quadrature_demod_cf(1)
self.sync = digital.clock_recovery_mm_ff(2, 0.0076562, 0.5, 0.175, 0.005)
self.slicer = digital.binary_slicer_fb()
self.detect_seq = digital.correlate_access_code_bb("01010101010101010101010101010101", 1)
self.dump = flysky.dumpsync()
self.connect(self._u,self.filter1,self.squelch,self.demod,self.sync,self.slicer,self.detect_seq, self.dump)
def __init__(self, syncword_threshold=None, nrzi=True, options=None):
gr.hier_block2.__init__(
self,
'astrocast_fx25_deframer',
gr.io_signature(1, 1, gr.sizeof_float),
gr.io_signature(0, 0, 0))
options_block.__init__(self, options)
self.message_port_register_hier_out('out')
if syncword_threshold is None:
syncword_threshold = self.options.syncword_threshold
self.slicer = digital.binary_slicer_fb()
if nrzi:
self.nrzi = nrzi_decode()
self.deframer = sync_to_pdu_packed(
packlen=255, sync=_syncword, threshold=syncword_threshold)
self.reflect = reflect_bytes()
self.rs = decode_rs(True, 1)
self.crc = check_astrocast_crc(self.options.verbose_crc)
blocks = [self, self.slicer]
if nrzi:
blocks.append(self.nrzi)
blocks.append(self.deframer)
self.connect(*blocks)
self.msg_connect((self.deframer, 'out'), (self.reflect, 'in'))
self.msg_connect((self.reflect, 'out'), (self.rs, 'in'))
self.msg_connect((self.rs, 'out'), (self.crc, 'in'))
self.msg_connect((self.crc, 'ok'), (self, 'out'))
def __init__(self, interpolation=36, decimation=125):
gr.hier_block2.__init__(self, "indri_smartnet_control_channel",
gr.io_signature(1,1,gr.sizeof_float),
gr.io_signature(1,1,1))
# Figure out where zero should be, despite RTL-SDR drift
avglen = 1000 # should be big enough to catch drifts
offset = blocks.moving_average_ff(avglen, 1.0/avglen, 40*avglen)
differential = blocks.sub_ff()
self.connect(self, (differential,0))
self.connect(self, offset)
self.connect(offset, (differential,1))
# sample off the offsets to adjust tuning
offset_sampler = blocks.keep_one_in_n(gr.sizeof_float, 10*avglen)
offset_mag_block = blocks.probe_signal_f()
self.offset_mag = offset_mag_block
self.connect(offset, offset_sampler, offset_mag_block)
rational_resampler = gr_filter.rational_resampler_fff(
interpolation=interpolation,
decimation=decimation,
taps=None,
fractional_bw=0.45,
)
slicer = digital.binary_slicer_fb()
self.connect(differential, rational_resampler, slicer, self)
def __init__(self, syncword_threshold=None, options=None):
gr.hier_block2.__init__(
self,
'swiatowid_deframer',
gr.io_signature(1, 1, gr.sizeof_float),
gr.io_signature(0, 0, 0))
options_block.__init__(self, options)
self.message_port_register_hier_out('out')
if syncword_threshold is None:
syncword_threshold = self.options.syncword_threshold
self.slicer = digital.binary_slicer_fb()
self.deframer = sync_to_pdu_packed(
packlen=8200, sync=_syncword, threshold=syncword_threshold)
self.reflect = reflect_bytes()
self.crop = swiatowid_packet_crop()
self.split = swiatowid_packet_split()
self.rs = decode_rs(8, 0x11d, 0, 1, 10, 1)
self.connect(self, self.slicer, self.deframer)
self.msg_connect((self.deframer, 'out'), (self.reflect, 'in'))
self.msg_connect((self.reflect, 'out'), (self.crop, 'in'))
self.msg_connect((self.crop, 'out'), (self.split, 'in'))
self.msg_connect((self.split, 'out'), (self.rs, 'in'))
self.msg_connect((self.rs, 'out'), (self, 'out'))
def __init__(self):
gr.top_block.__init__(self, "Gotenna Rx Usrp")
##################################################
# Variables
##################################################
self.samp_rate = samp_rate = 32000000
self.fsk_deviation_hz = fsk_deviation_hz = 12500
self.chan_spacing = chan_spacing = 500000
self.baud_rate = baud_rate = 24000
##################################################
# Blocks
##################################################
self.uhd_usrp_source_0 = uhd.usrp_source(
",".join(("", '')),
uhd.stream_args(
cpu_format="fc32",
args='',
channels=list(range(0,1)),
),
)
self.uhd_usrp_source_0.set_center_freq(915000000, 0)
self.uhd_usrp_source_0.set_gain(5, 0)
self.uhd_usrp_source_0.set_antenna('TX/RX', 0)
self.uhd_usrp_source_0.set_samp_rate(samp_rate)
self.uhd_usrp_source_0.set_time_unknown_pps(uhd.time_spec())
self.rational_resampler_xxx_0 = filter.rational_resampler_fff(
interpolation=1,
decimation=4,
taps=None,
fractional_bw=None)
self.gotenna_sink = gotenna_sink.blk()
self.digital_symbol_sync_xx_0 = digital.symbol_sync_ff(
digital.TED_DANDREA_AND_MENGALI_GEN_MSK,
float(chan_spacing) / baud_rate / 4,
0.05,
1.5,
1.0,
0.001 * float(chan_spacing) / baud_rate / 4,
1,
digital.constellation_bpsk().base(),
digital.IR_MMSE_8TAP,
128,
[])
self.digital_binary_slicer_fb_0 = digital.binary_slicer_fb()
self.blocks_keep_one_in_n_0 = blocks.keep_one_in_n(gr.sizeof_gr_complex*1, samp_rate // chan_spacing)
self.analog_quadrature_demod_cf_0 = analog.quadrature_demod_cf(chan_spacing/(2*math.pi*fsk_deviation_hz))
##################################################
# Connections
##################################################
self.connect((self.analog_quadrature_demod_cf_0, 0), (self.rational_resampler_xxx_0, 0))
self.connect((self.blocks_keep_one_in_n_0, 0), (self.analog_quadrature_demod_cf_0, 0))
self.connect((self.digital_binary_slicer_fb_0, 0), (self.gotenna_sink, 0))
self.connect((self.digital_symbol_sync_xx_0, 0), (self.digital_binary_slicer_fb_0, 0))
self.connect((self.rational_resampler_xxx_0, 0), (self.digital_symbol_sync_xx_0, 0))
self.connect((self.uhd_usrp_source_0, 0), (self.blocks_keep_one_in_n_0, 0))
def __init__(self, syncword_threshold = None, options = None):
gr.hier_block2.__init__(self, "eseo_deframer",
gr.io_signature(1, 1, gr.sizeof_float),
gr.io_signature(0, 0, 0))
options_block.__init__(self, options)
self.message_port_register_hier_out('out')
if syncword_threshold is None:
syncword_threshold = self.options.syncword_threshold
self.slicer = digital.binary_slicer_fb()
self.deframer = sync_to_pdu_packed(packlen = 257,\
sync = _syncword,\
threshold = syncword_threshold)
self.crop = eseo_packet_crop(drop_rs = False)
self.rs = decode_rs_general(0x11d, 1, 1, 16, self.options.verbose_rs)
self.line = eseo_line_decoder()
self.crc = check_eseo_crc(self.options.verbose_crc)
self.connect(self, self.slicer, self.deframer)
self.msg_connect((self.deframer, 'out'), (self.crop, 'in'))
self.msg_connect((self.crop, 'out'), (self.rs, 'in'))
self.msg_connect((self.rs, 'out'), (self.line, 'in'))
self.msg_connect((self.line, 'out'), (self.crc, 'in'))
self.msg_connect((self.crc, 'ok'), (self, 'out'))
def __init__(self, options, filename):
gr.top_block.__init__(self)
inf_str = None
symbol_rate = 152.34e3
sample_rate = 1e6
#if len(options) != 0:
# inf_str = args[0]
squelch = analog.pwr_squelch_cc(float(options.squelch), 0.1, 0, True)
demod = analog.quadrature_demod_cf(1.0)
cr = digital.clock_recovery_mm_ff(sample_rate/symbol_rate, 0.00765625, 0, 0.175, 0.005)
slicer = digital.binary_slicer_fb()
corr = digital.correlate_access_code_bb(AC, 3)
sink = sniffer()
if False:
print "Reading from: " + inf_str
src = blocks.file_source(gr.sizeof_gr_complex, inf_str, False)
else:
freqs = {
'AA':917.0e6, 'AB':913.0e6, 'AC':914.0e6, 'AD':915.0e6,
'BA':916.0e6, 'BB':919.0e6, 'BC':920.0e6, 'BD':921.0e6,
'CA':922.0e6, 'CB':923.0e6, 'CC':907.0e6, 'CD':908.0e6,
'DA':905.5e6, 'DB':909.0e6, 'DC':911.0e6, 'DD':910.0e6}
frequency = freqs[options.channel]
print "Channel: " + options.channel + " (" + str(frequency/1e6) + "MHz)"
# Create a UHD device source
src = uhd.usrp_source(device_addr=options.args, stream_args=uhd.stream_args('fc32', "sc16", args=""))
# Set the subdevice spec
if(options.spec):
src.set_subdev_spec(options.spec, 0)
# Set the antenna
if(options.antenna):
src.set_antenna(options.antenna, 0)
# Set receiver sample rate
src.set_samp_rate(options.samp_rate)
# Set receive daughterboard gain
if options.gain is None:
g = src.get_gain_range()
options.gain = float(g.start()+g.stop())/2
print "Using mid-point gain of", options.gain, "(", g.start(), "-", g.stop(), ")"
src.set_gain(options.gain)
# Set frequency (tune request takes lo_offset)
treq = uhd.tune_request(frequency)
tr = src.set_center_freq(treq)
if tr == None:
sys.stderr.write('Failed to set center frequency\n')
raise SystemExit, 1
self.connect(src, squelch, demod, cr, slicer, corr, sink)
def __init__(self, syncword_threshold=None, options=None):
gr.hier_block2.__init__(
self,
'fossasat_deframer',
gr.io_signature(1, 1, gr.sizeof_float),
gr.io_signature(0, 0, 0))
options_block.__init__(self, options)
self.message_port_register_hier_out('out')
if syncword_threshold is None:
syncword_threshold = self.options.syncword_threshold
self.slicer = digital.binary_slicer_fb()
self.sync = sync_to_pdu_packed(
packlen=255, sync=_syncword, threshold=syncword_threshold)
self.reflect_1 = reflect_bytes()
self.scrambler = pn9_scrambler()
self.reflect_2 = reflect_bytes()
self.crop = sx12xx_packet_crop(crc_len=2)
self.crc = sx12xx_check_crc(
verbose=self.options.verbose_crc, initial=0x1D0F, final=0xFFFF)
self.remove_length = pdu_head_tail(3, 1)
self.connect(self, self.slicer, self.sync)
self.msg_connect((self.sync, 'out'), (self.reflect_1, 'in'))
self.msg_connect((self.reflect_1, 'out'), (self.scrambler, 'in'))
self.msg_connect((self.scrambler, 'out'), (self.reflect_2, 'in'))
self.msg_connect((self.reflect_2, 'out'), (self.crop, 'in'))
self.msg_connect((self.crop, 'out'), (self.crc, 'in'))
self.msg_connect((self.crc, 'ok'), (self.remove_length, 'in'))
self.msg_connect((self.remove_length, 'out'), (self, 'out'))
def __init__(self, syncword_threshold=None, options=None):
gr.hier_block2.__init__(self, 'aalto1_deframer',
gr.io_signature(1, 1, gr.sizeof_float),
gr.io_signature(0, 0, 0))
options_block.__init__(self, options)
self.message_port_register_hier_out('out')
if syncword_threshold is None:
syncword_threshold = self.options.syncword_threshold
self.slicer = digital.binary_slicer_fb()
self.deframer = sync_to_pdu_packed(packlen=255,
sync=syncword,
threshold=syncword_threshold)
self.scrambler = pn9_scrambler()
self.crop = cc11xx_packet_crop(True)
self.crc = check_crc16_ccitt(self.options.verbose_crc)
self.crop2 = pdu_head_tail(3, 1)
self.connect(self, self.slicer, self.deframer)
self.msg_connect((self.deframer, 'out'), (self.scrambler, 'in'))
self.msg_connect((self.scrambler, 'out'), (self.crop, 'in'))
self.msg_connect((self.crop, 'out'), (self.crc, 'in'))
self.msg_connect((self.crc, 'ok'), (self.crop2, 'in'))
self.msg_connect((self.crop2, 'out'), (self, 'out'))
def __init__(self, samplerate, symbolrate = SYMRATE, channel_str = None, sendmsg = True, debug = False, samplepersymbol = SPS, fmdeviation = FM_DEVIATION ): gr.hier_block2.__init__(self, "pocsag", gr.io_signature(1, 1, gr.sizeof_gr_complex), gr.io_signature(1, 1, 1)) self.samplerate = samplerate self.symbolrate = symbolrate self.sendmsg = sendmsg self.debug = debug self.samplepersymbol = samplepersymbol self.fmdeviation = fmdeviation self.fractional_interpolator = gr.fractional_interpolator_cc(0, 1.0 * samplerate / (symbolrate * samplepersymbol)) self.quadrature_demod = gr.quadrature_demod_cf((symbolrate * samplepersymbol) / (fmdeviation * 4.0)) self.low_pass_filter = gr.fir_filter_fff(1, gr.firdes.low_pass(1, symbolrate * samplepersymbol, symbolrate * 2, symbolrate / 2.0, gr.firdes.WIN_HAMMING, 6.76)) self.digital_clock_recovery_mm = digital.clock_recovery_mm_ff(samplepersymbol, 0.03 * 0.03 * 0.3, 0.4, 0.03, 1e-4) self.digital_binary_slicer_fb = digital.binary_slicer_fb() self.pktdecoder = pocsag_pktdecoder(channel_str = channel_str, sendmsg = sendmsg, debug = debug) self.connect(self, self.fractional_interpolator, self.quadrature_demod, self.low_pass_filter, self.digital_clock_recovery_mm, self.digital_binary_slicer_fb, self.pktdecoder, self)
def __init__(self, ebn0, nbits):
gr.hier_block2.__init__(self, 'BPSK',
gr.io_signature(1, 1, gr.sizeof_char),
gr.io_signature(1, 1, gr.sizeof_char))
samp_rate = 48e3
sps = 5
self.head = blocks.head(gr.sizeof_char, nbits)
self.pack = blocks.pack_k_bits_bb(8)
self.bpsk_constellation = digital.constellation_bpsk().base()
self.modulator = digital.generic_mod(
constellation = self.bpsk_constellation,
differential = False,
samples_per_symbol = sps,
pre_diff_code = True,
excess_bw = 0.35,
verbose = False,
log = False)
spb = sps
self.channel = channels.channel_model(np.sqrt(spb)/10**(ebn0/20), 0, 1.0, [1], RAND_SEED, False)
self.demod = bpsk_demodulator(samp_rate/sps, samp_rate, iq = True)
self.slice = digital.binary_slicer_fb()
self.connect(self, self.head, self.pack, self.modulator, self.channel,
self.demod, self.slice, self)
def __init__(self):
gr.top_block.__init__(self, "Top Block")
##################################################
# Variables
##################################################
self.variable_slider_0 = variable_slider_0 = .846
self.test = test = .005
self.shift = shift = .906
self.samp_rate_0 = samp_rate_0 = 1.2e6
self.samp_rate = samp_rate = 1.2e6/4
self.pows = pows = 1.3
self.lpf = lpf = .724
self.go = go = 0.564
self.gm = gm = 1.61
self.centre_freq = centre_freq = 439.95e6
##################################################
# Blocks
##################################################
self.rtlsdr_source_0 = osmosdr.source( args="numchan=" + str(1) + " " + "" )
self.rtlsdr_source_0.set_sample_rate(samp_rate_0)
self.rtlsdr_source_0.set_center_freq(439.9e6, 0)
self.rtlsdr_source_0.set_freq_corr(0, 0)
self.rtlsdr_source_0.set_dc_offset_mode(0, 0)
self.rtlsdr_source_0.set_iq_balance_mode(2, 0)
self.rtlsdr_source_0.set_gain_mode(False, 0)
self.rtlsdr_source_0.set_gain(20, 0)
self.rtlsdr_source_0.set_if_gain(10, 0)
self.rtlsdr_source_0.set_bb_gain(10, 0)
self.rtlsdr_source_0.set_antenna("", 0)
self.rtlsdr_source_0.set_bandwidth(0, 0)
self.low_pass_filter_1 = filter.fir_filter_fff(10, firdes.low_pass(
1, samp_rate, 2.56e3*lpf, (2.56e3/2)*lpf, firdes.WIN_HAMMING, 6.76))
self.freq_xlating_fir_filter_xxx_0 = filter.freq_xlating_fir_filter_ccc(4, (firdes.low_pass_2(1,samp_rate_0,100e3,50e3,40)), 0, samp_rate_0)
self.digital_clock_recovery_mm_xx_1 = digital.clock_recovery_mm_ff(11.6439*(1+test), 0.25*0.175*0.175*go, 0.5, 0.175*gm, 0.005*variable_slider_0)
self.digital_binary_slicer_fb_0 = digital.binary_slicer_fb()
self.blocks_add_const_vxx_0 = blocks.add_const_vff((-12*shift, ))
self.blks2_tcp_sink_0 = grc_blks2.tcp_sink(
itemsize=gr.sizeof_char*1,
addr="127.0.0.1",
port=9000,
server=False,
)
self.analog_quadrature_demod_cf_0 = analog.quadrature_demod_cf(10)
self.analog_pwr_squelch_xx_0 = analog.pwr_squelch_cc(-40*pows, .001, 0, False)
##################################################
# Connections
##################################################
self.connect((self.analog_pwr_squelch_xx_0, 0), (self.analog_quadrature_demod_cf_0, 0))
self.connect((self.analog_quadrature_demod_cf_0, 0), (self.low_pass_filter_1, 0))
self.connect((self.blocks_add_const_vxx_0, 0), (self.digital_clock_recovery_mm_xx_1, 0))
self.connect((self.digital_binary_slicer_fb_0, 0), (self.blks2_tcp_sink_0, 0))
self.connect((self.digital_clock_recovery_mm_xx_1, 0), (self.digital_binary_slicer_fb_0, 0))
self.connect((self.freq_xlating_fir_filter_xxx_0, 0), (self.analog_pwr_squelch_xx_0, 0))
self.connect((self.low_pass_filter_1, 0), (self.blocks_add_const_vxx_0, 0))
self.connect((self.rtlsdr_source_0, 0), (self.freq_xlating_fir_filter_xxx_0, 0))
def __init__(self):
gr.top_block.__init__(self, "Quetzal-1 Receiver")
##################################################
# Variables
##################################################
self.symb_rate = symb_rate = 4800
self.samp_rate = samp_rate = 48000
self.samp_per_sym = samp_per_sym = int(samp_rate/symb_rate)
self.log = log = 0
self.homedir = homedir = ""
self.hhmmss = hhmmss = ""
self.gain_mu = gain_mu = 0.175*3
self.filename_raw_beacon = filename_raw_beacon = ""
self.filename_parsed_beacon = filename_parsed_beacon = ""
self.filename_image_metadata = filename_image_metadata = ""
self.filename_image = filename_image = ""
self.do_once = do_once = 0
self.data_rate = data_rate = 4800
self.count = count = 0
self.center_freq = center_freq = 437.2e6
##################################################
# Blocks
##################################################
self.zeromq_pub_sink_0 = zeromq.pub_sink(gr.sizeof_char, 1, 'tcp://127.0.0.1:1502', 100, False, -1)
self.satellites_strip_ax25_header_0 = satellites.strip_ax25_header()
self.satellites_nrzi_decode_0 = satellites.nrzi_decode()
self.satellites_hdlc_deframer_0 = satellites.hdlc_deframer(check_fcs=True, max_length=10000)
self.quetzal1_parse = quetzal1_parse.quetzal1_parse(filename_parsed_beacon='', filename_raw_beacon='')
self.low_pass_filter_0_0 = filter.fir_filter_fff(1, firdes.low_pass(
1, 48000, 2400, 2000, firdes.WIN_HAMMING, 6.76))
self.digital_descrambler_bb_0 = digital.descrambler_bb(0x21, 0, 16)
self.digital_clock_recovery_mm_xx_0_0 = digital.clock_recovery_mm_ff(10, 0.25*gain_mu*gain_mu, 0.5, gain_mu, 0.005)
self.digital_binary_slicer_fb_0 = digital.binary_slicer_fb()
self.blocks_wavfile_source_0 = blocks.wavfile_source('/home/dan/Documents/repos/gr-quetzal1/recordings/example_beacon_quetzal1.wav', False)
self.blocks_throttle_0 = blocks.throttle(gr.sizeof_float*1, samp_rate,True)
self.blocks_pdu_to_tagged_stream_0 = blocks.pdu_to_tagged_stream(blocks.byte_t, 'packet_len')
self.blocks_multiply_const_vxx_0 = blocks.multiply_const_vff((5, ))
self.blocks_add_const_vxx_0 = blocks.add_const_vff((0, ))
##################################################
# Connections
##################################################
self.msg_connect((self.satellites_hdlc_deframer_0, 'out'), (self.satellites_strip_ax25_header_0, 'in'))
self.msg_connect((self.satellites_strip_ax25_header_0, 'out'), (self.blocks_pdu_to_tagged_stream_0, 'pdus'))
self.msg_connect((self.satellites_strip_ax25_header_0, 'out'), (self.quetzal1_parse, 'in'))
self.connect((self.blocks_add_const_vxx_0, 0), (self.blocks_multiply_const_vxx_0, 0))
self.connect((self.blocks_multiply_const_vxx_0, 0), (self.low_pass_filter_0_0, 0))
self.connect((self.blocks_pdu_to_tagged_stream_0, 0), (self.zeromq_pub_sink_0, 0))
self.connect((self.blocks_throttle_0, 0), (self.blocks_add_const_vxx_0, 0))
self.connect((self.blocks_wavfile_source_0, 0), (self.blocks_throttle_0, 0))
self.connect((self.digital_binary_slicer_fb_0, 0), (self.satellites_nrzi_decode_0, 0))
self.connect((self.digital_clock_recovery_mm_xx_0_0, 0), (self.digital_binary_slicer_fb_0, 0))
self.connect((self.digital_descrambler_bb_0, 0), (self.satellites_hdlc_deframer_0, 0))
self.connect((self.low_pass_filter_0_0, 0), (self.digital_clock_recovery_mm_xx_0_0, 0))
self.connect((self.satellites_nrzi_decode_0, 0), (self.digital_descrambler_bb_0, 0))
def _setup_top_block(self):
self.tb = gr.top_block()
samp_rate = 96000
oversample = 10
center_freq = 868.280e6
# Radio receiver, initial downsampling
args = str("nchan=1 rtl=%s,buffers=16,offset_tune=1" % self.device)
osmosdr_source = osmosdr.source_c(args=args)
osmosdr_source.set_sample_rate(samp_rate*oversample)
osmosdr_source.set_center_freq(center_freq, 0)
osmosdr_source.set_freq_corr(0, 0)
osmosdr_source.set_gain_mode(1, 0)
osmosdr_source.set_gain(0, 0)
low_pass_filter = gr.fir_filter_ccf(oversample,
firdes.low_pass(1, samp_rate*oversample, 90e3, 8e3, firdes.WIN_HAMMING, 6.76))
self.tb.connect((osmosdr_source, 0), (low_pass_filter, 0))
# Squelch
self.noise_probe = gr.probe_avg_mag_sqrd_c(0, 1.0/samp_rate/1e2)
self.squelch = gr.simple_squelch_cc(self.noise_level, 1)
noise_probe_thread = threading.Thread(target=self._noise_probe_thread)
noise_probe_thread.start()
self.threads.append(noise_probe_thread)
self.tb.connect((low_pass_filter, 0), (self.noise_probe, 0))
self.tb.connect((low_pass_filter, 0), (self.squelch, 0))
# FM demodulation
quadrature_demod = gr.quadrature_demod_cf(1)
self.tb.connect((self.squelch, 0), (quadrature_demod, 0))
# Binary slicing, transformation into capture-compatible format
add_offset = gr.add_const_vff((-1e-3, ))
binary_slicer = digital.binary_slicer_fb()
char_to_float = gr.char_to_float(1, 1)
multiply_const = gr.multiply_const_vff((255, ))
float_to_uchar = gr.float_to_uchar()
pipe_sink = gr.file_sink(gr.sizeof_char*1, self.pipe)
pipe_sink.set_unbuffered(False)
self.tb.connect((quadrature_demod, 0), (add_offset, 0))
self.tb.connect((add_offset, 0), (binary_slicer, 0))
self.tb.connect((binary_slicer, 0), (char_to_float, 0))
self.tb.connect((char_to_float, 0), (multiply_const, 0))
self.tb.connect((multiply_const, 0), (float_to_uchar, 0))
self.tb.connect((float_to_uchar, 0), (pipe_sink, 0))
def __init__(self):
gr.top_block.__init__(self, "Gotenna Rx Hackrf")
##################################################
# Variables
##################################################
self.samp_rate = samp_rate = 500000
self.fsk_deviation_hz = fsk_deviation_hz = 12500
self.chan_spacing = chan_spacing = 500000
self.baud_rate = baud_rate = 24000
##################################################
# Blocks
##################################################
self.rational_resampler_xxx_0 = filter.rational_resampler_fff(
interpolation=1,
decimation=4,
taps=None,
fractional_bw=None)
self.osmosdr_source_0 = osmosdr.source(
args="numchan=" + str(1) + " " + ''
)
self.osmosdr_source_0.set_time_unknown_pps(osmosdr.time_spec_t())
self.osmosdr_source_0.set_sample_rate(samp_rate)
self.osmosdr_source_0.set_center_freq(915000000, 0)
self.osmosdr_source_0.set_freq_corr(0, 0)
self.osmosdr_source_0.set_gain(1, 0)
self.osmosdr_source_0.set_if_gain(16, 0)
self.osmosdr_source_0.set_bb_gain(1, 0)
self.osmosdr_source_0.set_antenna('', 0)
self.osmosdr_source_0.set_bandwidth(26000000, 0)
self.gotenna_sink = gotenna_sink.blk()
self.digital_symbol_sync_xx_0 = digital.symbol_sync_ff(
digital.TED_DANDREA_AND_MENGALI_GEN_MSK,
float(chan_spacing) / baud_rate / 4,
0.05,
1.5,
1.0,
0.001 * float(chan_spacing) / baud_rate / 4,
1,
digital.constellation_bpsk().base(),
digital.IR_MMSE_8TAP,
128,
[])
self.digital_binary_slicer_fb_0 = digital.binary_slicer_fb()
self.dc_blocker_xx_0 = filter.dc_blocker_ff(512, True)
self.analog_quadrature_demod_cf_0 = analog.quadrature_demod_cf(chan_spacing/(2*math.pi*fsk_deviation_hz))
##################################################
# Connections
##################################################
self.connect((self.analog_quadrature_demod_cf_0, 0), (self.dc_blocker_xx_0, 0))
self.connect((self.dc_blocker_xx_0, 0), (self.rational_resampler_xxx_0, 0))
self.connect((self.digital_binary_slicer_fb_0, 0), (self.gotenna_sink, 0))
self.connect((self.digital_symbol_sync_xx_0, 0), (self.digital_binary_slicer_fb_0, 0))
self.connect((self.osmosdr_source_0, 0), (self.analog_quadrature_demod_cf_0, 0))
self.connect((self.rational_resampler_xxx_0, 0), (self.digital_symbol_sync_xx_0, 0))
def test_binary_slicer_fb():
top = gr.top_block()
src = analog.fastnoise_source_f(analog.GR_UNIFORM, math.sqrt(2))
slicer = digital.binary_slicer_fb()
probe = blocks.probe_rate(gr.sizeof_char)
top.connect(src, slicer, probe)
return top, probe
def test_binary_slicer_fb():
top = gr.top_block()
src = analog.fastnoise_source_f(analog.GR_UNIFORM, math.sqrt(2))
slicer = digital.binary_slicer_fb()
probe = blocks.probe_rate(gr.sizeof_char)
top.connect(src, slicer, probe)
return top, probe
def __init__(self):
grc_wxgui.top_block_gui.__init__(self, title="Top Block")
##################################################
# Variables
##################################################
self.samp_rate = samp_rate = 1000000
self.dec_rate = dec_rate = 2
##################################################
# Blocks
##################################################
self.uhd_usrp_source_0 = uhd.usrp_source(
device_addr="",
stream_args=uhd.stream_args(
cpu_format="fc32",
channels=range(1),
),
)
self.uhd_usrp_source_0.set_samp_rate(1000000)
self.uhd_usrp_source_0.set_center_freq(2400490000, 0)
self.uhd_usrp_source_0.set_gain(0, 0)
self.low_pass_filter_0_0 = gr.interp_fir_filter_ccf(
1,
firdes.low_pass(1, samp_rate, 500000, 10000, firdes.WIN_HAMMING,
6.76))
self.low_pass_filter_0 = gr.fir_filter_fff(
1,
firdes.low_pass(1, samp_rate, 500000, 10000, firdes.WIN_HAMMING,
6.76))
self.gr_quadrature_demod_cf_0 = gr.quadrature_demod_cf(1)
self.gr_pwr_squelch_xx_0 = gr.pwr_squelch_cc(-100, 0.001, 0, True)
self.flysky_dumpsync_0 = flysky.dumpsync()
self.digital_correlate_access_code_bb_0_1 = digital.correlate_access_code_bb(
"010101010101010101010101010101010101010001110101", 1)
self.digital_clock_recovery_mm_xx_0 = digital.clock_recovery_mm_ff(
2, 0.0076562, 0.5, 0.175, 0.005)
self.digital_binary_slicer_fb_0 = digital.binary_slicer_fb()
##################################################
# Connections
##################################################
self.connect((self.digital_clock_recovery_mm_xx_0, 0),
(self.digital_binary_slicer_fb_0, 0))
self.connect((self.gr_quadrature_demod_cf_0, 0),
(self.low_pass_filter_0, 0))
self.connect((self.low_pass_filter_0, 0),
(self.digital_clock_recovery_mm_xx_0, 0))
self.connect((self.gr_pwr_squelch_xx_0, 0),
(self.gr_quadrature_demod_cf_0, 0))
self.connect((self.uhd_usrp_source_0, 0),
(self.low_pass_filter_0_0, 0))
self.connect((self.low_pass_filter_0_0, 0),
(self.gr_pwr_squelch_xx_0, 0))
self.connect((self.digital_binary_slicer_fb_0, 0),
(self.digital_correlate_access_code_bb_0_1, 0))
self.connect((self.digital_correlate_access_code_bb_0_1, 0),
(self.flysky_dumpsync_0, 0))
def __init__(self):
gr.top_block.__init__(self, "Afsk Csu")
##################################################
# Variables
##################################################
self.samp_rate = samp_rate = 44100
self.bps = bps = 1200
self.window_len = window_len = (samp_rate / bps) * 2
self.dec = dec = 4
self.window_sync = window_sync = signal.windows.hann(116)
self.window = window = signal.windows.cosine(window_len)
self.dec_samp_rate = dec_samp_rate = samp_rate / dec
self.bpf_width = bpf_width = bps + 200
self.bpf_trans = bpf_trans = 200
##################################################
# Blocks
##################################################
self.freq_xlating_fir_filter_xxx_0_0 = filter.freq_xlating_fir_filter_fcf(
dec, (window), (2200 + 1200) / 2, samp_rate)
self.digital_diff_decoder_bb_0 = digital.diff_decoder_bb(2)
self.digital_clock_recovery_mm_xx_0_0 = digital.clock_recovery_mm_ff(
9.1875, 0.28, 0, 0.024, 0.01)
self.digital_binary_slicer_fb_0_0 = digital.binary_slicer_fb()
self.blocks_wavfile_source_0 = blocks.wavfile_source(
'/tmp/gs-sample.wav', False)
self.blocks_multiply_const_vxx_0 = blocks.multiply_const_vff((1, ))
self.blocks_file_sink_1_0_1_0 = blocks.file_sink(
gr.sizeof_char * 1, '/tmp/gs-sample.binary', False)
self.blocks_file_sink_1_0_1_0.set_unbuffered(True)
self.band_pass_filter_0 = filter.fir_filter_fff(
1,
firdes.band_pass(1, samp_rate, 1700 - bpf_width, 1700 + bpf_width,
bpf_trans, firdes.WIN_HAMMING, 6.76))
self.analog_quadrature_demod_cf_0 = analog.quadrature_demod_cf(
(dec_samp_rate / bps) / (math.pi * 0.5))
##################################################
# Connections
##################################################
self.connect((self.analog_quadrature_demod_cf_0, 0),
(self.blocks_multiply_const_vxx_0, 0))
self.connect((self.band_pass_filter_0, 0),
(self.freq_xlating_fir_filter_xxx_0_0, 0))
self.connect((self.blocks_multiply_const_vxx_0, 0),
(self.digital_clock_recovery_mm_xx_0_0, 0))
self.connect((self.blocks_wavfile_source_0, 0),
(self.band_pass_filter_0, 0))
self.connect((self.digital_binary_slicer_fb_0_0, 0),
(self.digital_diff_decoder_bb_0, 0))
self.connect((self.digital_clock_recovery_mm_xx_0_0, 0),
(self.digital_binary_slicer_fb_0_0, 0))
self.connect((self.digital_diff_decoder_bb_0, 0),
(self.blocks_file_sink_1_0_1_0, 0))
self.connect((self.freq_xlating_fir_filter_xxx_0_0, 0),
(self.analog_quadrature_demod_cf_0, 0))
def __init__(self, source_data, sampling_rate, carrier_hz, symbol_rate, deviation, access_code):
super(FSKDemodulator, self).__init__()
self._decoded = {}
self._carrier_hz = carrier_hz
self._deviation = deviation
self._access_code = access_code
samp_rate = sampling_rate
#symbol_rate = 9920
self.samples_per_symbol = float(samp_rate) / symbol_rate
omega = self.samples_per_symbol * 1.0
mu = 0.0
gain_mu = 0.2
gain_omega = 0.25 * gain_mu * gain_mu
omega_relative_limit = 0.001
tap_count = int(math.floor(self.samples_per_symbol))
hz_n = (carrier_hz - deviation)
taps_n = numpy.exp(numpy.arange(tap_count, dtype=numpy.float32) * 2.0j * numpy.pi * hz_n / samp_rate)
hz_p = (carrier_hz + deviation)
taps_p = numpy.exp(numpy.arange(tap_count, dtype=numpy.float32) * 2.0j * numpy.pi * hz_p / samp_rate)
#source = blocks.file_source(gr.sizeof_gr_complex*1, filepath_in, False)
# Concatenate data to compensate for correlate_access_code_bb latency
source_data_padding_count = int(math.ceil(self.samples_per_symbol * 64))
source_data = numpy.concatenate((source_data, numpy.zeros((source_data_padding_count,), dtype=numpy.complex64)))
source = NumpySource(source_data)
filter_n = filter.fir_filter_ccc(1, taps_n.tolist())
self.connect(source, filter_n)
filter_p = filter.fir_filter_ccc(1, taps_p.tolist())
self.connect(source, filter_p)
mag_n = blocks.complex_to_mag(1)
self.connect(filter_n, mag_n)
mag_p = blocks.complex_to_mag(1)
self.connect(filter_p, mag_p)
sub_pn = blocks.sub_ff()
self.connect(mag_p, (sub_pn, 0))
self.connect(mag_n, (sub_pn, 1))
clock_recovery = digital.clock_recovery_mm_ff(omega, gain_omega, mu, gain_mu, omega_relative_limit)
self.connect(sub_pn, clock_recovery)
slicer = digital.binary_slicer_fb()
self.connect(clock_recovery, slicer)
access_code_correlator = digital.correlate_access_code_bb(access_code, 0)
self.connect(slicer, access_code_correlator)
self.packetizer = Packetizer()
self.connect(access_code_correlator, self.packetizer)
def __init__(self):
gr.top_block.__init__(self, "Top Block")
##################################################
# Variables
##################################################
self.channel_spacing = channel_spacing = 500000
self.width = width = 40000
self.tuner = tuner = 868.95e6
self.squelch = squelch = -25
self.samp_rate = samp_rate = 1.024e6
self.freq_offset = freq_offset = (channel_spacing /
2) + (channel_spacing * .1)
self.demodgain = demodgain = 4
self.cutoff = cutoff = 200000
##################################################
# Blocks
##################################################
self.osmosdr_source_0_1 = osmosdr.source(args="numchan=" + str(1) +
" " + '')
self.osmosdr_source_0_1.set_time_unknown_pps(osmosdr.time_spec_t())
self.osmosdr_source_0_1.set_sample_rate(samp_rate)
self.osmosdr_source_0_1.set_center_freq(tuner + freq_offset, 0)
self.osmosdr_source_0_1.set_freq_corr(21, 0)
self.osmosdr_source_0_1.set_gain_mode(False, 0)
self.osmosdr_source_0_1.set_gain(10, 0)
self.osmosdr_source_0_1.set_if_gain(24, 0)
self.osmosdr_source_0_1.set_bb_gain(20, 0)
self.osmosdr_source_0_1.set_antenna('', 0)
self.osmosdr_source_0_1.set_bandwidth(0, 0)
self.freq_xlating_fir_filter_xxx_0_1 = filter.freq_xlating_fir_filter_ccc(
1,
firdes.low_pass(1, samp_rate, cutoff, width, firdes.WIN_BLACKMAN,
6.76), -freq_offset, samp_rate)
self.digital_binary_slicer_fb_0 = digital.binary_slicer_fb()
self.blocks_file_sink_0 = blocks.file_sink(
gr.sizeof_char * 1,
'capture_' + datetime.today().strftime('%Y%m%d%H%M%S'), False)
self.blocks_file_sink_0.set_unbuffered(False)
self.analog_simple_squelch_cc_0 = analog.simple_squelch_cc(squelch, 1)
self.analog_quadrature_demod_cf_0 = analog.quadrature_demod_cf(
demodgain)
##################################################
# Connections
##################################################
self.connect((self.analog_quadrature_demod_cf_0, 0),
(self.digital_binary_slicer_fb_0, 0))
self.connect((self.analog_simple_squelch_cc_0, 0),
(self.analog_quadrature_demod_cf_0, 0))
self.connect((self.digital_binary_slicer_fb_0, 0),
(self.blocks_file_sink_0, 0))
self.connect((self.freq_xlating_fir_filter_xxx_0_1, 0),
(self.analog_simple_squelch_cc_0, 0))
self.connect((self.osmosdr_source_0_1, 0),
(self.freq_xlating_fir_filter_xxx_0_1, 0))
def __init__(self, source_data, sampling_rate, carrier_hz, symbol_rate, deviation, access_code):
super(FSKDemodulator, self).__init__()
self._decoded = {}
self._carrier_hz = carrier_hz
self._deviation = deviation
self._access_code = access_code
samp_rate = sampling_rate
#symbol_rate = 9920
self.samples_per_symbol = float(samp_rate) / symbol_rate
omega = self.samples_per_symbol * 1.0
mu = 0.0
gain_mu = 0.2
gain_omega = 0.25 * gain_mu * gain_mu
omega_relative_limit = 0.001
tap_count = int(math.floor(self.samples_per_symbol))
hz_n = (carrier_hz - deviation)
taps_n = numpy.exp(numpy.arange(tap_count, dtype=numpy.float32) * 2.0j * numpy.pi * hz_n / samp_rate)
hz_p = (carrier_hz + deviation)
taps_p = numpy.exp(numpy.arange(tap_count, dtype=numpy.float32) * 2.0j * numpy.pi * hz_p / samp_rate)
#source = blocks.file_source(gr.sizeof_gr_complex*1, filepath_in, False)
# Concatenate data to compensate for correlate_access_code_bb latency
source_data_padding_count = int(math.ceil(self.samples_per_symbol * 64))
source_data = numpy.concatenate((source_data, numpy.zeros((source_data_padding_count,), dtype=numpy.complex64)))
source = NumpySource(source_data)
filter_n = filter.fir_filter_ccc(1, taps_n.tolist())
self.connect(source, filter_n)
filter_p = filter.fir_filter_ccc(1, taps_p.tolist())
self.connect(source, filter_p)
mag_n = blocks.complex_to_mag(1)
self.connect(filter_n, mag_n)
mag_p = blocks.complex_to_mag(1)
self.connect(filter_p, mag_p)
sub_pn = blocks.sub_ff()
self.connect(mag_p, (sub_pn, 0))
self.connect(mag_n, (sub_pn, 1))
clock_recovery = digital.clock_recovery_mm_ff(omega, gain_omega, mu, gain_mu, omega_relative_limit)
self.connect(sub_pn, clock_recovery)
slicer = digital.binary_slicer_fb()
self.connect(clock_recovery, slicer)
access_code_correlator = digital.correlate_access_code_bb(access_code, 0)
self.connect(slicer, access_code_correlator)
self.packetizer = Packetizer()
self.connect(access_code_correlator, self.packetizer)
def __init__(self,
samp_rate=1600000,
samp_per_sym=16,
freq_error=-0.0025000):
gr.hier_block2.__init__(
self,
"Wireless M-Bus Demod",
gr.io_signature(1, 1, gr.sizeof_gr_complex * 1),
gr.io_signature(1, 1, gr.sizeof_char * 1),
)
##################################################
# Parameters
##################################################
self.samp_rate = samp_rate
self.samp_per_sym = samp_per_sym
self.freq_error = freq_error
##################################################
# Variables
##################################################
self.cutoff = cutoff = 120e3
self.chip_rate = chip_rate = samp_rate / samp_per_sym
##################################################
# Blocks
##################################################
self.low_pass_filter_0 = gnuradio.filter.fir_filter_ccf(
1,
gnuradio.filter.firdes.low_pass(1, samp_rate, cutoff, cutoff / 2,
gnuradio.filter.firdes.WIN_HAMMING,
6.76))
self.gr_sub_xx_0 = blocks.sub_ff(1)
self.gr_single_pole_iir_filter_xx_0 = gnuradio.filter.single_pole_iir_filter_ff(
0.0512 / samp_per_sym, 1)
self.gr_quadrature_demod_cf_0 = analog.quadrature_demod_cf(1)
self.digital_clock_recovery_mm_xx_0 = digital.clock_recovery_mm_ff(
samp_per_sym * (1 + freq_error), .25 * 0.06 * 0.06 * 4, 0.5,
0.06 * 2, 0.002 * 2)
self.digital_binary_slicer_fb_0 = digital.binary_slicer_fb()
##################################################
# Connections
##################################################
self.connect((self.gr_quadrature_demod_cf_0, 0),
(self.gr_single_pole_iir_filter_xx_0, 0))
self.connect((self.gr_single_pole_iir_filter_xx_0, 0),
(self.gr_sub_xx_0, 1))
self.connect((self.gr_quadrature_demod_cf_0, 0), (self.gr_sub_xx_0, 0))
self.connect((self.gr_sub_xx_0, 0),
(self.digital_clock_recovery_mm_xx_0, 0))
self.connect((self.digital_clock_recovery_mm_xx_0, 0),
(self.digital_binary_slicer_fb_0, 0))
self.connect((self.low_pass_filter_0, 0),
(self.gr_quadrature_demod_cf_0, 0))
self.connect((self.digital_binary_slicer_fb_0, 0), (self, 0))
self.connect((self, 0), (self.low_pass_filter_0, 0))
def __init__(self):
gr.top_block.__init__(self, "Top Block")
##################################################
# Variables
##################################################
self.channel_spacing = channel_spacing = 200000
self.width = width = 20000
self.tuner = tuner = 434e6
self.squelch = squelch = -25
self.samp_rate = samp_rate = 1.024e6
self.freq_offset = freq_offset = (channel_spacing /
2) + (channel_spacing * .1)
self.demodgain = demodgain = 4
self.cutoff = cutoff = 134000
##################################################
# Blocks
##################################################
self.osmosdr_source_c_0_1 = osmosdr.source()
self.osmosdr_source_c_0_1.set_sample_rate(samp_rate)
self.osmosdr_source_c_0_1.set_center_freq(tuner + freq_offset, 0)
self.osmosdr_source_c_0_1.set_freq_corr(21, 0)
self.osmosdr_source_c_0_1.set_iq_balance_mode(0, 0)
self.osmosdr_source_c_0_1.set_gain_mode(0, 0)
self.osmosdr_source_c_0_1.set_gain(10, 0)
self.osmosdr_source_c_0_1.set_if_gain(24, 0)
self.osmosdr_source_c_0_1.set_bb_gain(20, 0)
self.osmosdr_source_c_0_1.set_antenna("", 0)
self.osmosdr_source_c_0_1.set_bandwidth(0, 0)
self.freq_xlating_fir_filter_xxx_0_1 = filter.freq_xlating_fir_filter_ccc(
1, (firdes.low_pass(1, samp_rate, cutoff, width,
firdes.WIN_BLACKMAN, 6.76)), -freq_offset,
samp_rate)
self.digital_binary_slicer_fb_0 = digital.binary_slicer_fb()
self.blocks_file_sink_0 = blocks.file_sink(gr.sizeof_char * 1,
"capture", False)
self.blocks_file_sink_0.set_unbuffered(False)
self.analog_simple_squelch_cc_0 = analog.simple_squelch_cc(squelch, 1)
self.analog_quadrature_demod_cf_0 = analog.quadrature_demod_cf(
demodgain)
##################################################
# Connections
##################################################
self.connect((self.freq_xlating_fir_filter_xxx_0_1, 0),
(self.analog_simple_squelch_cc_0, 0))
self.connect((self.osmosdr_source_c_0_1, 0),
(self.freq_xlating_fir_filter_xxx_0_1, 0))
self.connect((self.analog_simple_squelch_cc_0, 0),
(self.analog_quadrature_demod_cf_0, 0))
self.connect((self.digital_binary_slicer_fb_0, 0),
(self.blocks_file_sink_0, 0))
self.connect((self.analog_quadrature_demod_cf_0, 0),
(self.digital_binary_slicer_fb_0, 0))
def __init__(self, callsign='', invert=1, ip='::', latitude=0, longitude=0, port=7355, recstart=''):
gr.top_block.__init__(self, "TW-1B decoder")
##################################################
# Parameters
##################################################
self.callsign = callsign
self.invert = invert
self.ip = ip
self.latitude = latitude
self.longitude = longitude
self.port = port
self.recstart = recstart
##################################################
# Variables
##################################################
self.threshold = threshold = 6
self.gain_mu = gain_mu = 0.175*3
self.access_code = access_code = "10010011000010110101000111011110"
##################################################
# Blocks
##################################################
self.sync_to_pdu_packed_0 = sync_to_pdu_packed(
packlen=256,
sync=access_code,
threshold=threshold,
)
self.sids_submit_0 = sids.submit('http://tlm.pe0sat.nl/tlmdb/frame_db.php', 40927, callsign, longitude, latitude, recstart)
self.sids_print_timestamp_0 = sids.print_timestamp('%Y-%m-%d %H:%M:%S')
self.low_pass_filter_0 = filter.fir_filter_fff(1, firdes.low_pass(
1, 48000, 2400, 2000, firdes.WIN_HAMMING, 6.76))
self.digital_descrambler_bb_0 = digital.descrambler_bb(0x21, 0x00, 16)
self.digital_clock_recovery_mm_xx_0 = digital.clock_recovery_mm_ff(10, 0.25*gain_mu*gain_mu, 0.5, gain_mu, 0.005)
self.digital_binary_slicer_fb_0 = digital.binary_slicer_fb()
self.blocks_udp_source_0 = blocks.udp_source(gr.sizeof_short*1, ip, port, 1472, False)
self.blocks_short_to_float_0 = blocks.short_to_float(1, 32767.0)
self.blocks_multiply_const_vxx_0 = blocks.multiply_const_vff((invert*10, ))
self.blocks_message_debug_0 = blocks.message_debug()
self.ax100_gomx3_rs_decode_0 = ax100.gomx3_rs_decode(False)
##################################################
# Connections
##################################################
self.msg_connect((self.ax100_gomx3_rs_decode_0, 'out'), (self.sids_print_timestamp_0, 'in'))
self.msg_connect((self.ax100_gomx3_rs_decode_0, 'out'), (self.sids_submit_0, 'in'))
self.msg_connect((self.sids_print_timestamp_0, 'out'), (self.blocks_message_debug_0, 'print_pdu'))
self.msg_connect((self.sync_to_pdu_packed_0, 'out'), (self.ax100_gomx3_rs_decode_0, 'in'))
self.connect((self.blocks_multiply_const_vxx_0, 0), (self.low_pass_filter_0, 0))
self.connect((self.blocks_short_to_float_0, 0), (self.blocks_multiply_const_vxx_0, 0))
self.connect((self.blocks_udp_source_0, 0), (self.blocks_short_to_float_0, 0))
self.connect((self.digital_binary_slicer_fb_0, 0), (self.digital_descrambler_bb_0, 0))
self.connect((self.digital_clock_recovery_mm_xx_0, 0), (self.digital_binary_slicer_fb_0, 0))
self.connect((self.digital_descrambler_bb_0, 0), (self.sync_to_pdu_packed_0, 0))
self.connect((self.low_pass_filter_0, 0), (self.digital_clock_recovery_mm_xx_0, 0))
def __init__(self, freq, ppm, osmosdr_args):
gr.top_block.__init__(self, "gr_omnicon")
self.msgq_out = blocks_message_sink_0_msgq_out = gr.msg_queue(0)
##################################################
# Variables
##################################################
self.xlate_bandwidth = xlate_bandwidth = 15.0e3
self.samp_rate = samp_rate = 1.2e6
self.xlate_decimation = xlate_decimation = int(samp_rate/(xlate_bandwidth*3.2))
self.baud_rate = baud_rate = 2400
self.lowpass_decimation = lowpass_decimation = int((samp_rate/xlate_decimation)/(baud_rate*4))
self.freq_offset = freq_offset = 250000
self.sps = sps = (samp_rate/xlate_decimation/lowpass_decimation)/baud_rate
self.omega_rel_limit = omega_rel_limit = ((2450.0-2400.0)/2400.0)
self.gain_omega = gain_omega = 0
self.gain_mu = gain_mu = 0.1
self.freq_tune = freq_tune = freq-freq_offset
##################################################
# Blocks
##################################################
self.rtlsdr_source_0 = osmosdr.source(args=osmosdr_args)
self.rtlsdr_source_0.set_sample_rate(samp_rate)
self.rtlsdr_source_0.set_center_freq(freq_tune, 0)
self.rtlsdr_source_0.set_freq_corr(ppm, 0)
self.rtlsdr_source_0.set_dc_offset_mode(0, 0)
self.rtlsdr_source_0.set_iq_balance_mode(0, 0)
self.rtlsdr_source_0.set_gain_mode(True, 0)
self.rtlsdr_source_0.set_gain(42, 0)
self.rtlsdr_source_0.set_if_gain(10, 0)
self.rtlsdr_source_0.set_bb_gain(10, 0)
self.rtlsdr_source_0.set_antenna("", 0)
self.rtlsdr_source_0.set_bandwidth(0, 0)
self.low_pass_filter_0 = filter.fir_filter_fff(lowpass_decimation, firdes.low_pass(
1, samp_rate/xlate_decimation, baud_rate, (baud_rate)/10, firdes.WIN_HAMMING, 6.76))
self.freq_xlating_fir_filter_xxx_0 = filter.freq_xlating_fir_filter_ccc(xlate_decimation, (firdes.low_pass(1, samp_rate, xlate_bandwidth, xlate_bandwidth/20 )), freq_offset, samp_rate)
self.digital_clock_recovery_mm_xx_0 = digital.clock_recovery_mm_ff(sps, gain_omega, 0.5, gain_mu, omega_rel_limit)
self.digital_binary_slicer_fb_0 = digital.binary_slicer_fb()
self.dc_blocker_xx_0 = filter.dc_blocker_ff(500, True)
self.blocks_message_sink_0 = blocks.message_sink(gr.sizeof_char*1, blocks_message_sink_0_msgq_out, False)
self.analog_quadrature_demod_cf_0_0_0 = analog.quadrature_demod_cf(1)
##################################################
# Connections
##################################################
self.connect((self.analog_quadrature_demod_cf_0_0_0, 0), (self.dc_blocker_xx_0, 0))
#self.connect((self.blocks_message_sink_0, 'msg'), (self, 0))
self.connect((self.dc_blocker_xx_0, 0), (self.low_pass_filter_0, 0))
self.connect((self.digital_binary_slicer_fb_0, 0), (self.blocks_message_sink_0, 0))
self.connect((self.digital_clock_recovery_mm_xx_0, 0), (self.digital_binary_slicer_fb_0, 0))
self.connect((self.freq_xlating_fir_filter_xxx_0, 0), (self.analog_quadrature_demod_cf_0_0_0, 0))
self.connect((self.low_pass_filter_0, 0), (self.digital_clock_recovery_mm_xx_0, 0))
self.connect((self.rtlsdr_source_0, 0), (self.freq_xlating_fir_filter_xxx_0, 0))
def __init__(self):
gr.top_block.__init__(self, "grc_cc1111_test_local_loop")
##################################################
# Variables
##################################################
self.symbole_rate = symbole_rate = 80000
self.samp_rate = samp_rate = 2e6
self.samp_per_sym = samp_per_sym = int(samp_rate / symbole_rate)
self.preamble = preamble = '0101010101010101'
self.myqueue_out = myqueue_out = gr.msg_queue(2)
self.myqueue_in = myqueue_in = gr.msg_queue(2)
self.bit_per_sym = bit_per_sym = 1
self.access_code = access_code = '11010011100100011101001110010001'
##################################################
# Blocks
##################################################
self.digital_gmsk_mod_0 = digital.gmsk_mod(
samples_per_symbol=int(samp_per_sym),
bt=0.5,
verbose=False,
log=False,
)
self.digital_correlate_access_code_bb_0_0 = digital.correlate_access_code_bb(access_code, 1)
self.digital_clock_recovery_mm_xx_0_0 = digital.clock_recovery_mm_ff(samp_per_sym*(1+0.0), 0.25*0.175*0.175, 0.5, 0.175, 0.005)
self.digital_binary_slicer_fb_0_0_0 = digital.binary_slicer_fb()
self.cc1111_cc1111_packet_encoder_0 = cc1111.cc1111_packet_mod_base(cc1111.cc1111_packet_encoder(
samples_per_symbol=samp_per_sym,
bits_per_symbol=bit_per_sym,
preamble=preamble,
access_code=access_code,
pad_for_usrp=True,
do_whitening=True,
add_crc=True
),
source_queue=myqueue_in
)
self.cc1111_cc1111_packet_decoder_0 = cc1111.cc1111_packet_decoder(myqueue_out,True, True, False, True)
self.blocks_throttle_0 = blocks.throttle(gr.sizeof_char*1, samp_rate,True)
self.blocks_null_sink_0 = blocks.null_sink(gr.sizeof_char*1)
self.analog_quadrature_demod_cf_0_0 = analog.quadrature_demod_cf(1)
##################################################
# Connections
##################################################
self.connect((self.digital_clock_recovery_mm_xx_0_0, 0), (self.digital_binary_slicer_fb_0_0_0, 0))
self.connect((self.analog_quadrature_demod_cf_0_0, 0), (self.digital_clock_recovery_mm_xx_0_0, 0))
self.connect((self.digital_binary_slicer_fb_0_0_0, 0), (self.digital_correlate_access_code_bb_0_0, 0))
self.connect((self.digital_gmsk_mod_0, 0), (self.analog_quadrature_demod_cf_0_0, 0))
self.connect((self.digital_correlate_access_code_bb_0_0, 0), (self.cc1111_cc1111_packet_decoder_0, 0))
self.connect((self.cc1111_cc1111_packet_decoder_0, 0), (self.blocks_null_sink_0, 0))
self.connect((self.blocks_throttle_0, 0), (self.digital_gmsk_mod_0, 0))
self.connect((self.cc1111_cc1111_packet_encoder_0, 0), (self.blocks_throttle_0, 0))
def __init__(self): gr.top_block.__init__(self, "FSK Demod Demo") # Variables self.symbol_rate = symbol_rate = 125e3 self.samp_rate = samp_rate = symbol_rate self.f_center = f_center = 868e6 self.sps = sps = 2 self.sensitivity = sensitivity = (pi / 2) / sps self.alpha = alpha = 0.0512/sps self.bandwidth = bandwidth = 100e3 # Blocks self.uhd_usrp_source_0 = uhd.usrp_source( device_addr="", stream_args=uhd.stream_args( cpu_format="fc32", channels=range(1), ), ) self.uhd_usrp_source_0.set_samp_rate(samp_rate) self.uhd_usrp_source_0.set_center_freq(f_center, 0) self.uhd_usrp_source_0.set_gain(0, 0) self.uhd_usrp_source_0.set_bandwidth(bandwidth, 0) self.fm_demod = gr.quadrature_demod_cf(1 / sensitivity) self.freq_offset = gr.single_pole_iir_filter_ff(alpha) self.sub = gr.sub_ff() self.add = gr.add_ff() self.multiply = gr.multiply_ff() self.invert = gr.multiply_const_vff((-1, )) # recover the clock omega = sps gain_mu = 0.03 mu = 0.5 omega_relative_limit = 0.0002 freq_error = 0.0 gain_omega = .25 * gain_mu * gain_mu # critically damped self.clock_recovery = digital.clock_recovery_mm_ff(omega, gain_omega, mu, gain_mu, omega_relative_limit) self.slice = digital.binary_slicer_fb() self.sink = gr.vector_sink_b(1) self.file_sink = gr.file_sink(gr.sizeof_char, 'fsk_dump.log') # Connections self.connect(self.fm_demod, (self.add, 0)) self.connect(self.fm_demod, self.freq_offset, (self.add, 1)) self.connect(self.uhd_usrp_source_0, self.fm_demod) self.connect(self.add, self.clock_recovery, self.invert, self.slice, self.file_sink) self.connect(self.slice, self.sink)
def __init__(self, options):
gr.hier_block2.__init__(self, "fsk_demod",
gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature
gr.io_signature(1, 1, gr.sizeof_char)) # Output signature
self._syms_per_sec = options.syms_per_sec # ditto
self._samples_per_second = options.samples_per_second
self._gain_mu = options.gain_mu # for the clock recovery block
self._mu = options.mu
self._omega_relative_limit = options.omega_relative_limit
self._freqoffset = options.offset
#first bring that input stream down to a manageable level, let's say 3 samples per bit.
self._clockrec_oversample = 3
self._downsampletaps = gr.firdes.low_pass(1, self._samples_per_second, 10000, 1000, firdes.WIN_HANN)
self._decim = int(self._samples_per_second / (self._syms_per_sec * self._clockrec_oversample))
print "Demodulator decimation: %i" % (self._decim,)
self._downsample = gr.freq_xlating_fir_filter_ccf(self._decim, #decimation
self._downsampletaps, #taps
self._freqoffset, #freq offset
self._samples_per_second) #sampling rate
#using a pll to demod gets you a nice IIR LPF response for free
self._demod = gr.pll_freqdet_cf(2.0 / self._clockrec_oversample, #gain alpha, rad/samp
2*pi/self._clockrec_oversample, #max freq, rad/samp
-2*pi/self._clockrec_oversample) #min freq, rad/samp
self._sps = float(self._samples_per_second)/self._decim/self._syms_per_sec
#band edge filter FLL with a low bandwidth is very good
#at synchronizing to continuous FSK signals
self._carriertrack = digital.fll_band_edge_cc(self._sps,
0.6, #rolloff factor
64, #taps
1.0) #loop bandwidth
print "Samples per symbol: %f" % (self._sps,)
self._softbits = digital.clock_recovery_mm_ff(self._sps,
0.25*self._gain_mu*self._gain_mu, #gain omega, = mu/2 * mu_gain^2
self._mu, #mu (decision threshold)
self._gain_mu, #mu gain
self._omega_relative_limit) #omega relative limit
self._subtract = gr.sub_ff()
self._slicer = digital.binary_slicer_fb()
self.connect(self, self._downsample, self._carriertrack, self._demod, self._softbits, self._slicer, self)
def __init__(self):
gr.top_block.__init__(self, "CC1101 Burst Detector")
def rx_callback():
print "Callback Fired"
# Variables
self.samp_rate = samp_rate = 250e3
self.f_center = f_center = 510e6
self.bandwidth = bandwidth = 125e3
self.gain = gain = 15
self.sps = sps = 2
# Blocks
self.uhd_src = uhd.usrp_source(
device_addr="serial=E8R10Z2B1", #cheetara
stream_args=uhd.stream_args(
cpu_format="fc32",
channels=range(1),
),
)
self.uhd_src.set_samp_rate(samp_rate)
self.uhd_src.set_center_freq(f_center, 0)
self.uhd_src.set_gain(gain, 0)
self.uhd_src.set_antenna("TX/RX", 0)
self.uhd_src.set_bandwidth(bandwidth, 0)
self.uhd_src.set_samp_rate(self.samp_rate)
self.uhd_src.set_center_freq(self.f_center, 0)
self.uhd_src.set_gain(self.gain, 0)
# change magic_num until abs(ratio) as close to 0 (when sending all A's)
# as possible (.000X or closer)
# need to solve clock synchronization
self.msk_demod = level.msk_demod_cf(ti_adj=False, magic_num=.022)
self.agc = gr.agc2_cc()
#self.clock_sync = digital.pfb_clock_sync_ccf(sps=2,)
self.costas_loop = digital.costas_loop_cc(2*3.14/100.0, 4)
self.packet_receiver = level.cc1k_demod_pkts(callback=rx_callback())
self.vec_sink = gr.vector_sink_f(1)
self.slicer = digital.binary_slicer_fb()
self.bin_sink = gr.vector_sink_b(1)
# Connections
self.connect(self.uhd_src, self.agc, self.msk_demod, self.slicer, self.bin_sink)
self.connect(self.msk_demod, self.vec_sink)
self.connect(self.uhd_src, self.packet_receiver)
def __init__(self, sps, gain_mu):
gr.hier_block2.__init__(self, "fsk_demod",
gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature
gr.io_signature(1, 1, gr.sizeof_char)) # Output signature
self._sps = float(sps)
self._gain_mu = gain_mu # for the clock recovery block
self._mu = 0.5
self._omega_relative_limit = 0.35
#first bring that input stream down to a manageable level
self._clockrec_oversample = 3.0
self._decim = self._sps / self._clockrec_oversample
print "Demodulator decimation: %f" % self._decim
self._downsampletaps = filter.firdes.low_pass(1.0/self._decim,
1.0, 0.4,
0.05, filter.firdes.WIN_HANN)
# self._downsample = filter.fft_filter_ccc(self._decim,
# self._downsampletaps)
#sure this works but it's a little heavy on the CPU at high rates
self._downsample = pfb.arb_resampler_ccf(1/self._decim)
self._clockrec_sps = self._sps / self._decim
#using a pll to demod gets you a nice IIR LPF response for free
self._demod = analog.pll_freqdet_cf(2.0 / self._clockrec_sps, #gain alpha, rad/samp
2*pi/self._clockrec_sps, #max freq, rad/samp
-2*pi/self._clockrec_sps) #min freq, rad/samp
#band edge filter FLL with a low bandwidth is very good
#at synchronizing to continuous FSK signals
self._carriertrack = digital.fll_band_edge_cc(self._clockrec_sps,
0.6, #rolloff factor
64, #taps
1.0) #loop bandwidth
print "Samples per symbol: %f" % (self._clockrec_sps,)
self._softbits = digital.clock_recovery_mm_ff(self._clockrec_sps,
0.25*self._gain_mu*self._gain_mu, #gain omega, = mu/2 * mu_gain^2
self._mu, #mu (decision threshold)
self._gain_mu, #mu gain
self._omega_relative_limit) #omega relative limit
self._slicer = digital.binary_slicer_fb()
if self._decim > 1:
self.connect(self, self._downsample, self._carriertrack, self._demod, self._softbits, self._slicer, self)
else:
self.connect(self, self._carriertrack, self._demod, self._softbits, self._slicer, self)
def __init__(self): gr.top_block.__init__(self, "MSK Demod Demo") # Variables self.samp_rate = samp_rate = 125e3 self.f_center = f_center = 868e6 self.bandwidth = bandwidth = 500e3 self.gain = gain = 5 self.decimation = decimation = 2 # Blocks self.uhd_usrp_source_0 = uhd.usrp_source( device_addr="", stream_args=uhd.stream_args( cpu_format="fc32", channels=range(1), ), ) self.uhd_usrp_source_0.set_samp_rate(samp_rate) self.uhd_usrp_source_0.set_center_freq(f_center, 0) self.uhd_usrp_source_0.set_gain(gain, 0) self.uhd_usrp_source_0.set_bandwidth(bandwidth, 0) self.msk_demod = msk.msk_demod_cf() self.slicer = digital.binary_slicer_fb() self.slicer2 = digital.binary_slicer_fb() self.offset = gr.add_const_vff((0, )) self.sink = gr.vector_sink_b(1) self.f_sink = gr.vector_sink_f(1) self.file_sink = gr.file_sink(gr.sizeof_char, 'fsk_dump.log') # Connections self.connect(self.uhd_usrp_source_0, self.msk_demod, self.offset, self.slicer, self.sink) self.connect(self.offset, self.f_sink) self.connect(self.offset, self.slicer2, self.file_sink)
def __init__(self, input_filename="usrp.dat", output_filename="frames.dat", decim=32, pll_alpha=0.01, clock_alpha=0.01): gr.top_block.__init__(self, "Hrpt Demod") ################################################## # Parameters ################################################## self.input_filename = input_filename self.output_filename = output_filename self.decim = decim self.pll_alpha = pll_alpha self.clock_alpha = clock_alpha ################################################## # Variables ################################################## self.sym_rate = sym_rate = 600*1109 self.sample_rate = sample_rate = 4e6 self.sps = sps = sample_rate/sym_rate self.max_clock_offset = max_clock_offset = 100e-6 self.max_carrier_offset = max_carrier_offset = 2*math.pi*100e3/sample_rate self.hs = hs = int(sps/2.0) ################################################## # Blocks ################################################## self.pll = noaa.hrpt_pll_cf(pll_alpha, pll_alpha**2/4.0, max_carrier_offset) self.noaa_hrpt_deframer_0 = noaa.hrpt_deframer() self.gr_moving_average_xx_0 = gr.moving_average_ff(hs, 1.0/hs, 4000) self.gr_file_sink_0 = gr.file_sink(gr.sizeof_short*1, output_filename) self.gr_file_sink_0.set_unbuffered(False) self.file_source = gr.file_source(gr.sizeof_short*1, input_filename, False) self.digital_clock_recovery_mm_xx_0 = digital.clock_recovery_mm_ff(sps/2.0, clock_alpha**2/4.0, 0.5, clock_alpha, max_clock_offset) self.digital_binary_slicer_fb_0 = digital.binary_slicer_fb() self.decoder = noaa.hrpt_decoder(True,False) self.cs2cf = gr.interleaved_short_to_complex() self.agc = gr.agc_cc(1e-5, 1.0, 1.0/32768.0, 1.0) ################################################## # Connections ################################################## self.connect((self.file_source, 0), (self.cs2cf, 0)) self.connect((self.pll, 0), (self.gr_moving_average_xx_0, 0)) self.connect((self.cs2cf, 0), (self.agc, 0)) self.connect((self.agc, 0), (self.pll, 0)) self.connect((self.noaa_hrpt_deframer_0, 0), (self.gr_file_sink_0, 0)) self.connect((self.noaa_hrpt_deframer_0, 0), (self.decoder, 0)) self.connect((self.gr_moving_average_xx_0, 0), (self.digital_clock_recovery_mm_xx_0, 0)) self.connect((self.digital_clock_recovery_mm_xx_0, 0), (self.digital_binary_slicer_fb_0, 0)) self.connect((self.digital_binary_slicer_fb_0, 0), (self.noaa_hrpt_deframer_0, 0))
def test_binary_slicer_fb(self):
expected_result = ( 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 1, 1, 0, 1, 1, 1, 1)
src_data = (-1, 1, -1, -1, 1, 1, -1, -1, -1, 1, 1, 1, -1, 1, 1, 1, 1)
src_data = [s + (1 - random.random()) for s in src_data] # add some noise
src = blocks.vector_source_f(src_data)
op = digital.binary_slicer_fb()
dst = blocks.vector_sink_b()
self.tb.connect(src, op)
self.tb.connect(op, dst)
self.tb.run() # run the graph and wait for it to finish
actual_result = dst.data() # fetch the contents of the sink
#print "actual result", actual_result
#print "expected result", expected_result
self.assertFloatTuplesAlmostEqual(expected_result, actual_result)
def __init__(self, input_rate, symbol_rate): super(clock_recovery, self).__init__( "clock_recovery", gr.io_signature(1, 1, gr.sizeof_float*1), gr.io_signature(1, 1, gr.sizeof_char*1), ) samples_per_symbol = float(input_rate) / symbol_rate omega_relative_limit = 0.02 gain_mu = 0.4 / samples_per_symbol self.clock_recovery = digital.clock_recovery_mm_ff(samples_per_symbol*(1+0.00), 0.25*gain_mu*gain_mu, 0.5, gain_mu, omega_relative_limit) self.slicer = digital.binary_slicer_fb() self.connect((self, 0), (self.clock_recovery, 0)) self.connect((self.clock_recovery, 0), (self.slicer, 0)) self.connect((self.slicer, 0), (self, 0))
def __init__(self):
gr.top_block.__init__(self, "Elster Rx Nogui")
##################################################
# Variables
##################################################
self.samp_rate = samp_rate = 2400000
self.rx_gain = rx_gain = 45
self.corr = corr = 0
self.channel_rate = channel_rate = 400000
self.channel_decimation = channel_decimation = 4
self.center_freq = center_freq = 904600000
##################################################
# Blocks
##################################################
self.osmosdr_source_0 = osmosdr.source( args="numchan=" + str(1) + " " + "" )
self.osmosdr_source_0.set_sample_rate(samp_rate)
self.osmosdr_source_0.set_center_freq(center_freq, 0)
self.osmosdr_source_0.set_freq_corr(corr, 0)
self.osmosdr_source_0.set_dc_offset_mode(0, 0)
self.osmosdr_source_0.set_iq_balance_mode(0, 0)
self.osmosdr_source_0.set_gain_mode(0, 0)
self.osmosdr_source_0.set_gain(rx_gain, 0)
self.osmosdr_source_0.set_if_gain(20, 0)
self.osmosdr_source_0.set_bb_gain(20, 0)
self.osmosdr_source_0.set_antenna("", 0)
self.osmosdr_source_0.set_bandwidth(0, 0)
self.low_pass_filter_1 = filter.fir_filter_fff(channel_decimation, firdes.low_pass(
1, channel_rate, 20000, 5000, firdes.WIN_HAMMING, 6.76))
self.elster_packetize_0 = elster.packetize(1)
self.digital_clock_recovery_mm_xx_0 = digital.clock_recovery_mm_ff(channel_rate * 56.48E-6 / 2 / channel_decimation, 0.25*(0.05*0.05), 0.5, 0.05, 0.005)
self.digital_binary_slicer_fb_0 = digital.binary_slicer_fb()
self.blocks_keep_one_in_n_0 = blocks.keep_one_in_n(gr.sizeof_gr_complex*1, samp_rate/channel_rate)
self.analog_quadrature_demod_cf_0 = analog.quadrature_demod_cf(-channel_rate/(115000*2*3.1416))
##################################################
# Connections
##################################################
self.connect((self.osmosdr_source_0, 0), (self.blocks_keep_one_in_n_0, 0))
self.connect((self.blocks_keep_one_in_n_0, 0), (self.analog_quadrature_demod_cf_0, 0))
self.connect((self.analog_quadrature_demod_cf_0, 0), (self.low_pass_filter_1, 0))
self.connect((self.low_pass_filter_1, 0), (self.digital_clock_recovery_mm_xx_0, 0))
self.connect((self.digital_binary_slicer_fb_0, 0), (self.elster_packetize_0, 0))
self.connect((self.digital_clock_recovery_mm_xx_0, 0), (self.digital_binary_slicer_fb_0, 0))
def __init__(self):
gr.top_block.__init__(self, "Top Block")
##################################################
# Variables
##################################################
self.channel_spacing = channel_spacing = 500000
self.width = width = 40000
self.tuner = tuner = 868.95e6
self.squelch = squelch = -25
self.samp_rate = samp_rate = 1.024e6
self.freq_offset = freq_offset = (channel_spacing / 2) + (channel_spacing * .1)
self.demodgain = demodgain = 24
self.cutoff = cutoff = 200000
##################################################
# Blocks
##################################################
self.osmosdr_source_c_0_1 = osmosdr.source()
self.osmosdr_source_c_0_1.set_sample_rate(samp_rate)
self.osmosdr_source_c_0_1.set_center_freq(tuner+freq_offset, 0)
self.osmosdr_source_c_0_1.set_freq_corr(21, 0)
self.osmosdr_source_c_0_1.set_iq_balance_mode(0, 0)
self.osmosdr_source_c_0_1.set_gain_mode(0, 0)
self.osmosdr_source_c_0_1.set_gain(10, 0)
self.osmosdr_source_c_0_1.set_if_gain(24, 0)
self.osmosdr_source_c_0_1.set_bb_gain(20, 0)
self.osmosdr_source_c_0_1.set_antenna("", 0)
self.osmosdr_source_c_0_1.set_bandwidth(0, 0)
self.freq_xlating_fir_filter_xxx_0_1 = filter.freq_xlating_fir_filter_ccc(1, (firdes.low_pass(1, samp_rate,cutoff, width, firdes.WIN_BLACKMAN, 6.76)), -freq_offset, samp_rate)
self.digital_binary_slicer_fb_0 = digital.binary_slicer_fb()
self.blocks_file_sink_0 = blocks.file_sink(gr.sizeof_char*1, "capture", False)
self.blocks_file_sink_0.set_unbuffered(False)
self.analog_simple_squelch_cc_0 = analog.simple_squelch_cc(squelch, 1)
self.analog_quadrature_demod_cf_0 = analog.quadrature_demod_cf(demodgain)
##################################################
# Connections
##################################################
self.connect((self.freq_xlating_fir_filter_xxx_0_1, 0), (self.analog_simple_squelch_cc_0, 0))
self.connect((self.osmosdr_source_c_0_1, 0), (self.freq_xlating_fir_filter_xxx_0_1, 0))
self.connect((self.analog_simple_squelch_cc_0, 0), (self.analog_quadrature_demod_cf_0, 0))
self.connect((self.digital_binary_slicer_fb_0, 0), (self.blocks_file_sink_0, 0))
self.connect((self.analog_quadrature_demod_cf_0, 0), (self.digital_binary_slicer_fb_0, 0))
def __init__(self):
grc_wxgui.top_block_gui.__init__(self, title="Top Block")
##################################################
# Variables
##################################################
self.samp_rate = samp_rate = 1000000
self.dec_rate = dec_rate = 2
##################################################
# Blocks
##################################################
self.uhd_usrp_source_0 = uhd.usrp_source(
device_addr="", stream_args=uhd.stream_args(cpu_format="fc32", channels=range(1))
)
self.uhd_usrp_source_0.set_samp_rate(1000000)
self.uhd_usrp_source_0.set_center_freq(2400490000, 0)
self.uhd_usrp_source_0.set_gain(0, 0)
self.low_pass_filter_0_0 = gr.interp_fir_filter_ccf(
1, firdes.low_pass(1, samp_rate, 500000, 10000, firdes.WIN_HAMMING, 6.76)
)
self.low_pass_filter_0 = gr.fir_filter_fff(
1, firdes.low_pass(1, samp_rate, 500000, 10000, firdes.WIN_HAMMING, 6.76)
)
self.gr_quadrature_demod_cf_0 = gr.quadrature_demod_cf(1)
self.gr_pwr_squelch_xx_0 = gr.pwr_squelch_cc(-100, 0.001, 0, True)
self.flysky_dumpsync_0 = flysky.dumpsync()
self.digital_correlate_access_code_bb_0_1 = digital.correlate_access_code_bb(
"010101010101010101010101010101010101010001110101", 1
)
self.digital_clock_recovery_mm_xx_0 = digital.clock_recovery_mm_ff(2, 0.0076562, 0.5, 0.175, 0.005)
self.digital_binary_slicer_fb_0 = digital.binary_slicer_fb()
##################################################
# Connections
##################################################
self.connect((self.digital_clock_recovery_mm_xx_0, 0), (self.digital_binary_slicer_fb_0, 0))
self.connect((self.gr_quadrature_demod_cf_0, 0), (self.low_pass_filter_0, 0))
self.connect((self.low_pass_filter_0, 0), (self.digital_clock_recovery_mm_xx_0, 0))
self.connect((self.gr_pwr_squelch_xx_0, 0), (self.gr_quadrature_demod_cf_0, 0))
self.connect((self.uhd_usrp_source_0, 0), (self.low_pass_filter_0_0, 0))
self.connect((self.low_pass_filter_0_0, 0), (self.gr_pwr_squelch_xx_0, 0))
self.connect((self.digital_binary_slicer_fb_0, 0), (self.digital_correlate_access_code_bb_0_1, 0))
self.connect((self.digital_correlate_access_code_bb_0_1, 0), (self.flysky_dumpsync_0, 0))
def test_001_t (self):
chaos_values = (1+0j, 0+1j, -1+0j, 0-1j)
expected_result = (0, 1, 0, 0, 1, 1)
zero = chaos_values + tuple(map(lambda v: -v, chaos_values))
one = 2 * chaos_values
src_data = zero + one + zero + zero + one + one
src = blocks.vector_source_c (src_data)
demod = chaos.dcsk_demod_cf (len(chaos_values), 0)
slicer = digital.binary_slicer_fb()
dst = blocks.vector_sink_b ()
self.tb.connect (src, demod, slicer, dst)
self.tb.run ()
result_data = dst.data ()
self.assertEqual (expected_result, result_data)
def __init__(self, src_file):
gr.top_block.__init__(self)
sample_rate = 11025
ampl = 0.1
print src_file
# Audio source (.wav file)
# TODO : Make the filename a VARIABLE
# src_file = input("Enter .wav File PSK31 : ")
src = blocks.wavfile_source(src_file, False)
# Raw float data output file.
# TODO : To make the raw file also a variable, for psk31decoder2.py to run
dst = blocks.file_sink(1, "./output.raw")
# Delay line. This delays the signal by 32ms
dl = blocks.delay(gr.sizeof_float, int(round(sample_rate/31.25)))
# Multiplier
# Multiplying the source and the delayed version will give us
# a negative output if there was a phase reversal and a positive output
# if there was no phase reversal
mul = blocks.multiply_ff(1)
# Low Pass Filter. This leaves us with the envelope of the signal
lpf_taps = filter.firdes.low_pass(
5.0,
sample_rate,
15,
600,
filter.firdes.WIN_HAMMING)
lpf = filter.fir_filter_fff(1, lpf_taps)
# Binary Slicer (comparator)
slc = digital.binary_slicer_fb()
# Connect the blocks.
self.connect(src, dl)
self.connect(src, (mul, 0))
self.connect(dl, (mul, 1))
self.connect(mul, lpf)
self.connect(lpf, slc)
self.connect(slc, dst)
def __init__(self, samp_rate=1600000, samp_per_sym=16, freq_error=-0.0025000): gr.hier_block2.__init__( self, "Wireless M-Bus Demod", gr.io_signature(1, 1, gr.sizeof_gr_complex*1), gr.io_signature(1, 1, gr.sizeof_char*1), ) ################################################## # Parameters ################################################## self.samp_rate = samp_rate self.samp_per_sym = samp_per_sym self.freq_error = freq_error ################################################## # Variables ################################################## self.cutoff = cutoff = 120e3 self.chip_rate = chip_rate = samp_rate/samp_per_sym ################################################## # Blocks ################################################## self.low_pass_filter_0 = gnuradio.filter.fir_filter_ccf(1, gnuradio.filter.firdes.low_pass( 1, samp_rate, cutoff, cutoff/2, gnuradio.filter.firdes.WIN_HAMMING, 6.76)) self.gr_sub_xx_0 = blocks.sub_ff(1) self.gr_single_pole_iir_filter_xx_0 = gnuradio.filter.single_pole_iir_filter_ff(0.0512/samp_per_sym, 1) self.gr_quadrature_demod_cf_0 = analog.quadrature_demod_cf(1) self.digital_clock_recovery_mm_xx_0 = digital.clock_recovery_mm_ff(samp_per_sym*(1+freq_error), .25 *0.06*0.06*4, 0.5, 0.06*2, 0.002*2) self.digital_binary_slicer_fb_0 = digital.binary_slicer_fb() ################################################## # Connections ################################################## self.connect((self.gr_quadrature_demod_cf_0, 0), (self.gr_single_pole_iir_filter_xx_0, 0)) self.connect((self.gr_single_pole_iir_filter_xx_0, 0), (self.gr_sub_xx_0, 1)) self.connect((self.gr_quadrature_demod_cf_0, 0), (self.gr_sub_xx_0, 0)) self.connect((self.gr_sub_xx_0, 0), (self.digital_clock_recovery_mm_xx_0, 0)) self.connect((self.digital_clock_recovery_mm_xx_0, 0), (self.digital_binary_slicer_fb_0, 0)) self.connect((self.low_pass_filter_0, 0), (self.gr_quadrature_demod_cf_0, 0)) self.connect((self.digital_binary_slicer_fb_0, 0), (self, 0)) self.connect((self, 0), (self.low_pass_filter_0, 0))
def __init__(self):
gr.top_block.__init__(self, "TW-1 test decoder")
##################################################
# Variables
##################################################
self.samp_rate = samp_rate = 48000
self.samp_per_sym = samp_per_sym = 10
self.gain_mu = gain_mu = 0.175*3
##################################################
# Blocks
##################################################
self.synctags_fixedlen_tagger_0 = synctags.fixedlen_tagger("syncword", "packet_len", 256*8, numpy.byte)
self.low_pass_filter_0 = filter.fir_filter_fff(1, firdes.low_pass(
1, samp_rate, 2400, 2000, firdes.WIN_HAMMING, 6.76))
self.digital_descrambler_bb_0 = digital.descrambler_bb(0x21, 0x00, 16)
self.digital_correlate_access_code_tag_bb_0 = digital.correlate_access_code_tag_bb("10010011000010110101000111011110", 4, "syncword")
self.digital_clock_recovery_mm_xx_0 = digital.clock_recovery_mm_ff(samp_per_sym*(1+0.0), 0.25*gain_mu*gain_mu, 0.5, gain_mu, 0.005)
self.digital_binary_slicer_fb_0 = digital.binary_slicer_fb()
self.blocks_wavfile_source_0 = blocks.wavfile_source("/tmp/tw-1c.wav", False)
self.blocks_unpacked_to_packed_xx_0 = blocks.unpacked_to_packed_bb(1, gr.GR_MSB_FIRST)
self.blocks_tagged_stream_to_pdu_0 = blocks.tagged_stream_to_pdu(blocks.byte_t, "packet_len")
self.blocks_tagged_stream_multiply_length_0 = blocks.tagged_stream_multiply_length(gr.sizeof_char*1, "packet_len", 1/8.0)
self.blocks_message_debug_1 = blocks.message_debug()
self.ax100_gomx3_rs_decode_0 = ax100.gomx3_rs_decode(True)
##################################################
# Connections
##################################################
self.msg_connect((self.ax100_gomx3_rs_decode_0, 'out'), (self.blocks_message_debug_1, 'print_pdu'))
self.msg_connect((self.blocks_tagged_stream_to_pdu_0, 'pdus'), (self.ax100_gomx3_rs_decode_0, 'in'))
self.connect((self.blocks_tagged_stream_multiply_length_0, 0), (self.blocks_tagged_stream_to_pdu_0, 0))
self.connect((self.blocks_unpacked_to_packed_xx_0, 0), (self.blocks_tagged_stream_multiply_length_0, 0))
self.connect((self.blocks_wavfile_source_0, 0), (self.low_pass_filter_0, 0))
self.connect((self.digital_binary_slicer_fb_0, 0), (self.digital_descrambler_bb_0, 0))
self.connect((self.digital_clock_recovery_mm_xx_0, 0), (self.digital_binary_slicer_fb_0, 0))
self.connect((self.digital_correlate_access_code_tag_bb_0, 0), (self.synctags_fixedlen_tagger_0, 0))
self.connect((self.digital_descrambler_bb_0, 0), (self.digital_correlate_access_code_tag_bb_0, 0))
self.connect((self.low_pass_filter_0, 0), (self.digital_clock_recovery_mm_xx_0, 0))
self.connect((self.synctags_fixedlen_tagger_0, 0), (self.blocks_unpacked_to_packed_xx_0, 0))
def __init__(self):
"""
Hierarchical block for FSK demodulation.
The input is the complex modulated signal at baseband
and the output is a stream of floats.
"""
# Initialize base class
gr.hier_block2.__init__(
self, "fsk_demod", gr.io_signature(1, 1, gr.sizeof_gr_complex), gr.io_signature(1, 1, gr.sizeof_float)
)
# Variables
self.sps = sps = 2
self.sensitivity = sensitivity = (pi / 2) / sps
self.alpha = alpha = 0.0512 / sps
self.fm_demod = gr.quadrature_demod_cf(1 / sensitivity)
self.freq_offset = gr.single_pole_iir_filter_ff(alpha)
self.sub = gr.sub_ff()
self.add = gr.add_ff()
self.multiply = gr.multiply_ff()
self.invert = gr.multiply_const_vff((-1,))
# recover the clock
omega = sps
gain_mu = 0.03
mu = 0.5
omega_relative_limit = 0.0002
freq_error = 0.0
gain_omega = 0.25 * gain_mu * gain_mu # critically damped
self.clock_recovery = digital.clock_recovery_mm_ff(omega, gain_omega, mu, gain_mu, omega_relative_limit)
self.slice = digital.binary_slicer_fb()
# Connections
self.connect(self.fm_demod, (self.add, 0))
self.connect(self.fm_demod, self.freq_offset, (self.add, 1))
self.connect(self, self.fm_demod)
self.connect(self.add, self.clock_recovery, self.invert, self)
def __init__(self):
"""
Hierarchical block for MSK demodulation.
The input is the complex modulated signal at baseband
and the output is a stream of floats.
"""
# Initialize base class
gr.hier_block2.__init__(
self, "msk_demod", gr.io_signature(1, 1, gr.sizeof_gr_complex), gr.io_signature(1, 1, gr.sizeof_float)
)
self.sps = 2
self.bt = 0.35
self.mu = 0.5
self.gain_mu = 0.175
self.freq_error = 0.0
self.omega_relative_limit = 0.005
self.omega = self.sps * (1 + self.freq_error)
self.gain_omega = 0.25 * self.gain_mu * self.gain_mu # critically damped
# Demodulate FM
sensitivity = (pi / 2) / self.sps
self.fmdemod = gr.quadrature_demod_cf(1.0 / sensitivity)
self.invert = gr.multiply_const_vff((-1,))
# TODO: this is hardcoded, how to figure out this value?
self.offset = gr.add_const_vff((-1.2,))
# 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 = digital.clock_recovery_mm_ff(
self.omega, self.gain_omega, self.mu, self.gain_mu, self.omega_relative_limit
)
self.slicer = digital.binary_slicer_fb()
self.connect(self, self.fmdemod, self.invert, self.clock_recovery, self.offset, self)
def __init__(self, input_rate, baud):
gr.hier_block2.__init__(
self, 'RTTY FSK demodulator',
gr.io_signature(1, 1, gr.sizeof_gr_complex * 1),
gr.io_signature(1, 1, gr.sizeof_float * 1),
)
self.bit_time = bit_time = input_rate / baud
fsk_deviation_hz = 85 # TODO param or just don't care
self.__dc_blocker = grfilter.dc_blocker_ff(int(bit_time * _HALF_BITS_PER_CODE * 10), False)
self.__quadrature_demod = analog.quadrature_demod_cf(-input_rate / (2 * math.pi * fsk_deviation_hz))
self.__freq_probe = blocks.probe_signal_f()
self.connect(
self,
self.__quadrature_demod,
self.__dc_blocker,
digital.binary_slicer_fb(),
blocks.char_to_float(scale=1),
self)
self.connect(self.__dc_blocker, self.__freq_probe)
