def __init__(self):
gr.top_block.__init__(self)
parser = OptionParser(option_class=eng_option)
parser.add_option("-R",
"--rx-subdev-spec",
type="subdev",
default=None,
help="select USRP Rx side A or B (default=A)")
parser.add_option("-f",
"--freq",
type="eng_float",
default=91.2e6,
help="set frequency to FREQ",
metavar="FREQ")
parser.add_option("-g",
"--gain",
type="eng_float",
default=None,
help="set gain in dB")
parser.add_option("-s",
"--squelch",
type="eng_float",
default=0,
help="set squelch level (default is 0)")
parser.add_option("-V",
"--volume",
type="eng_float",
default=None,
help="set volume (default is midpoint)")
parser.add_option("-O",
"--audio-output",
type="string",
default="plughw:0,0",
help="pcm device name (default is plughw:0,0)")
(options, args) = parser.parse_args()
if len(args) != 0:
parser.print_help()
sys.exit(1)
# connect to USRP
usrp_decim = 250
self.u = usrp.source_c(0, usrp_decim)
print "USRP Serial: ", self.u.serial_number()
demod_rate = self.u.adc_rate() / usrp_decim # 256 kS/s
audio_decim = 8
audio_rate = demod_rate / audio_decim # 32 kS/s
if options.rx_subdev_spec is None:
options.rx_subdev_spec = usrp.pick_subdev(self.u, dblist)
self.u.set_mux(
usrp.determine_rx_mux_value(self.u, options.rx_subdev_spec))
self.subdev = usrp.selected_subdev(self.u, options.rx_subdev_spec)
print "Using d'board", self.subdev.side_and_name()
# gain, volume, frequency
self.gain = options.gain
if options.gain is None:
self.gain = self.subdev.gain_range()[1]
self.vol = options.volume
if self.vol is None:
g = self.volume_range()
self.vol = float(g[0] + g[1]) / 2
self.freq = options.freq
if abs(self.freq) < 1e6:
self.freq *= 1e6
print "Volume:%r, Gain:%r, Freq:%3.1f MHz" % (self.vol, self.gain,
self.freq / 1e6)
# channel filter, wfm_rcv_pll
chan_filt_coeffs = optfir.low_pass(
1, # gain
demod_rate, # rate
80e3, # passband cutoff
115e3, # stopband cutoff
0.1, # passband ripple
60) # stopband attenuation
self.chan_filt = gr.fir_filter_ccf(1, chan_filt_coeffs)
self.guts = blks2.wfm_rcv_pll(demod_rate, audio_decim)
self.connect(self.u, self.chan_filt, self.guts)
# volume control, audio sink
self.volume_control_l = gr.multiply_const_ff(self.vol)
self.volume_control_r = gr.multiply_const_ff(self.vol)
self.audio_sink = audio.sink(int(audio_rate), options.audio_output,
False)
self.connect((self.guts, 0), self.volume_control_l,
(self.audio_sink, 0))
self.connect((self.guts, 1), self.volume_control_r,
(self.audio_sink, 1))
# pilot channel filter (band-pass, 18.5-19.5kHz)
pilot_filter_coeffs = gr.firdes.band_pass(
1, # gain
demod_rate, # sampling rate
18.5e3, # low cutoff
19.5e3, # high cutoff
1e3, # transition width
gr.firdes.WIN_HAMMING)
self.pilot_filter = gr.fir_filter_fff(1, pilot_filter_coeffs)
self.connect(self.guts.fm_demod, self.pilot_filter)
# RDS channel filter (band-pass, 54-60kHz)
rds_filter_coeffs = gr.firdes.band_pass(
1, # gain
demod_rate, # sampling rate
54e3, # low cutoff
60e3, # high cutoff
3e3, # transition width
gr.firdes.WIN_HAMMING)
self.rds_filter = gr.fir_filter_fff(1, rds_filter_coeffs)
self.connect(self.guts.fm_demod, self.rds_filter)
# create 57kHz subcarrier from 19kHz pilot, downconvert RDS channel
self.mixer = gr.multiply_ff()
self.connect(self.pilot_filter, (self.mixer, 0))
self.connect(self.pilot_filter, (self.mixer, 1))
self.connect(self.pilot_filter, (self.mixer, 2))
self.connect(self.rds_filter, (self.mixer, 3))
# low-pass the baseband RDS signal at 1.5kHz
rds_bb_filter_coeffs = gr.firdes.low_pass(
1, # gain
demod_rate, # sampling rate
1.5e3, # passband cutoff
2e3, # transition width
gr.firdes.WIN_HAMMING)
self.rds_bb_filter = gr.fir_filter_fff(1, rds_bb_filter_coeffs)
self.connect(self.mixer, self.rds_bb_filter)
# 1187.5bps = 19kHz/16
self.rds_clock = rds.freq_divider(16)
clock_taps = gr.firdes.low_pass(
1, # gain
demod_rate, # sampling rate
1.2e3, # passband cutoff
1.5e3, # transition width
gr.firdes.WIN_HANN)
self.clock_filter = gr.fir_filter_fff(1, clock_taps)
self.connect(self.pilot_filter, self.rds_clock, self.clock_filter)
# bpsk_demod, diff_decoder, rds_decoder
self.bpsk_demod = rds.bpsk_demod(demod_rate)
self.differential_decoder = gr.diff_decoder_bb(2)
self.msgq = gr.msg_queue()
self.rds_decoder = rds.data_decoder(self.msgq)
self.connect(self.rds_bb_filter, (self.bpsk_demod, 0))
self.connect(self.clock_filter, (self.bpsk_demod, 1))
self.connect(self.bpsk_demod, self.differential_decoder)
self.connect(self.differential_decoder, self.rds_decoder)
# set initial values
self.subdev.set_gain(self.gain)
self.set_vol(self.vol)
self.set_freq(self.freq)
def __init__(self):
gr.top_block.__init__ (self)
parser=OptionParser(option_class=eng_option)
parser.add_option("-R", "--rx-subdev-spec", type="subdev", default=None,
help="select USRP Rx side A or B (default=A)")
parser.add_option("-f", "--freq", type="eng_float", default=91.2e6,
help="set frequency to FREQ", metavar="FREQ")
parser.add_option("-g", "--gain", type="eng_float", default=None,
help="set gain in dB")
parser.add_option("-s", "--squelch", type="eng_float", default=0,
help="set squelch level (default is 0)")
parser.add_option("-V", "--volume", type="eng_float", default=None,
help="set volume (default is midpoint)")
parser.add_option("-O", "--audio-output", type="string", default="plughw:0,0",
help="pcm device name (default is plughw:0,0)")
(options, args) = parser.parse_args()
if len(args) != 0:
parser.print_help()
sys.exit(1)
# connect to USRP
usrp_decim = 250
self.u = usrp.source_c(0, usrp_decim)
print "USRP Serial: ", self.u.serial_number()
demod_rate = self.u.adc_rate() / usrp_decim # 256 kS/s
audio_decim = 8
audio_rate = demod_rate / audio_decim # 32 kS/s
if options.rx_subdev_spec is None:
options.rx_subdev_spec = usrp.pick_subdev(self.u, dblist)
self.u.set_mux(usrp.determine_rx_mux_value(self.u, options.rx_subdev_spec))
self.subdev = usrp.selected_subdev(self.u, options.rx_subdev_spec)
print "Using d'board", self.subdev.side_and_name()
# gain, volume, frequency
self.gain = options.gain
if options.gain is None:
self.gain = self.subdev.gain_range()[1]
self.vol = options.volume
if self.vol is None:
g = self.volume_range()
self.vol = float(g[0]+g[1])/2
self.freq = options.freq
if abs(self.freq) < 1e6:
self.freq *= 1e6
print "Volume:%r, Gain:%r, Freq:%3.1f MHz" % (self.vol, self.gain, self.freq/1e6)
# channel filter, wfm_rcv_pll
chan_filt_coeffs = optfir.low_pass(
1, # gain
demod_rate, # rate
80e3, # passband cutoff
115e3, # stopband cutoff
0.1, # passband ripple
60) # stopband attenuation
self.chan_filt = gr.fir_filter_ccf (1, chan_filt_coeffs)
self.guts = blks2.wfm_rcv_pll (demod_rate, audio_decim)
self.connect(self.u, self.chan_filt, self.guts)
# volume control, audio sink
self.volume_control_l = gr.multiply_const_ff(self.vol)
self.volume_control_r = gr.multiply_const_ff(self.vol)
self.audio_sink = audio.sink(int(audio_rate), options.audio_output, False)
self.connect ((self.guts, 0), self.volume_control_l, (self.audio_sink, 0))
self.connect ((self.guts, 1), self.volume_control_r, (self.audio_sink, 1))
# pilot channel filter (band-pass, 18.5-19.5kHz)
pilot_filter_coeffs = gr.firdes.band_pass(
1, # gain
demod_rate, # sampling rate
18.5e3, # low cutoff
19.5e3, # high cutoff
1e3, # transition width
gr.firdes.WIN_HAMMING)
self.pilot_filter = gr.fir_filter_fff(1, pilot_filter_coeffs)
self.connect(self.guts.fm_demod, self.pilot_filter)
# RDS channel filter (band-pass, 54-60kHz)
rds_filter_coeffs = gr.firdes.band_pass(
1, # gain
demod_rate, # sampling rate
54e3, # low cutoff
60e3, # high cutoff
3e3, # transition width
gr.firdes.WIN_HAMMING)
self.rds_filter = gr.fir_filter_fff(1, rds_filter_coeffs)
self.connect(self.guts.fm_demod, self.rds_filter)
# create 57kHz subcarrier from 19kHz pilot, downconvert RDS channel
self.mixer = gr.multiply_ff()
self.connect(self.pilot_filter, (self.mixer, 0))
self.connect(self.pilot_filter, (self.mixer, 1))
self.connect(self.pilot_filter, (self.mixer, 2))
self.connect(self.rds_filter, (self.mixer, 3))
# low-pass the baseband RDS signal at 1.5kHz
rds_bb_filter_coeffs = gr.firdes.low_pass(
1, # gain
demod_rate, # sampling rate
1.5e3, # passband cutoff
2e3, # transition width
gr.firdes.WIN_HAMMING)
self.rds_bb_filter = gr.fir_filter_fff(1, rds_bb_filter_coeffs)
self.connect(self.mixer, self.rds_bb_filter)
# 1187.5bps = 19kHz/16
self.rds_clock = rds.freq_divider(16)
clock_taps = gr.firdes.low_pass(
1, # gain
demod_rate, # sampling rate
1.2e3, # passband cutoff
1.5e3, # transition width
gr.firdes.WIN_HANN)
self.clock_filter = gr.fir_filter_fff(1, clock_taps)
self.connect(self.pilot_filter, self.rds_clock, self.clock_filter)
# bpsk_demod, diff_decoder, rds_decoder
self.bpsk_demod = rds.bpsk_demod(demod_rate)
self.differential_decoder = gr.diff_decoder_bb(2)
self.msgq = gr.msg_queue()
self.rds_decoder = rds.data_decoder(self.msgq)
self.connect(self.rds_bb_filter, (self.bpsk_demod, 0))
self.connect(self.clock_filter, (self.bpsk_demod, 1))
self.connect(self.bpsk_demod, self.differential_decoder)
self.connect(self.differential_decoder, self.rds_decoder)
# set initial values
self.subdev.set_gain(self.gain)
self.set_vol(self.vol)
self.set_freq(self.freq)
def __init__(self):
gr.top_block.__init__ (self)
parser=OptionParser(option_class=eng_option)
parser.add_option("-H", "--hostname", type="string", default="localhost",
help="set hostname of generic sdr")
parser.add_option("-P", "--portnum", type="int", default=None,
help="set portnum of generic sdr")
parser.add_option("-r", "--sdr_rate", type="eng_float", default=250e3,
help="set sample rate of generic sdr")
parser.add_option("-V", "--volume", type="eng_float", default=None,
help="set volume (default is midpoint)")
parser.add_option("-O", "--audio-output", type="string", default="plughw:0,0",
help="pcm device name (default is plughw:0,0)")
# print help when called with wrong arguments
(options, args) = parser.parse_args()
if len(args) != 0:
parser.print_help()
sys.exit(1)
self.vol = options.volume
if self.vol is None:
self.vol = 0.1
# connect to generic SDR
sdr_rate = options.sdr_rate
audio_decim = 8
audio_rate = int(sdr_rate/audio_decim)
print "audio_rate = ", audio_rate
self.interleaved_short_to_complex = gr.interleaved_short_to_complex()
self.char_to_short = gr.char_to_short(1)
self.sdr_source = grc_blks2.tcp_source(
itemsize=gr.sizeof_char*1,
addr=options.hostname,
port=options.portnum,
server=False
)
# self.sdr_source = gr.file_source(1, 'sdrs_baseband.dat')
# self.throttle = gr.throttle(1, 500e3)
# self.connect(self.sdr_source, self.file_sink)
self.logger = gr.file_sink(1, 'log.out')
self.connect(self.sdr_source, self.logger)
# channel filter
chan_filter_coeffs = gr.firdes.low_pass(
1.0, # gain
sdr_rate, # sampling rate
80e3, # passband cutoff
35e3, # transition width
gr.firdes.WIN_HAMMING)
self.chan_filter = gr.fir_filter_ccf(1, chan_filter_coeffs)
# print "# channel filter:", len(chan_filter_coeffs), "taps"
# PLL-based WFM demod
fm_alpha = 0.25 * 250e3 * math.pi / sdr_rate # 0.767
fm_beta = fm_alpha * fm_alpha / 4.0 # 0.147
fm_max_freq = 2.0 * math.pi * 90e3 / sdr_rate # 2.209
self.fm_demod = gr.pll_freqdet_cf(
1.0, # Loop BW
fm_max_freq, # in radians/sample
-fm_max_freq)
self.fm_demod.set_alpha(fm_alpha)
self.fm_demod.set_beta(fm_beta)
self.connect(self.sdr_source, self.char_to_short)
self.connect(self.char_to_short, self.interleaved_short_to_complex)
self.connect(self.interleaved_short_to_complex, self.chan_filter, self.fm_demod)
# L+R, pilot, L-R, RDS filters
lpr_filter_coeffs = gr.firdes.low_pass(
1.0, # gain
sdr_rate, # sampling rate
15e3, # passband cutoff
1e3, # transition width
gr.firdes.WIN_HAMMING)
self.lpr_filter = gr.fir_filter_fff(audio_decim, lpr_filter_coeffs)
pilot_filter_coeffs = gr.firdes.band_pass(
1.0, # gain
sdr_rate, # sampling rate
19e3-500, # low cutoff
19e3+500, # high cutoff
1e3, # transition width
gr.firdes.WIN_HAMMING)
self.pilot_filter = gr.fir_filter_fff(1, pilot_filter_coeffs)
dsbsc_filter_coeffs = gr.firdes.band_pass(
1.0, # gain
sdr_rate, # sampling rate
38e3-15e3/2, # low cutoff
38e3+15e3/2, # high cutoff
1e3, # transition width
gr.firdes.WIN_HAMMING)
self.dsbsc_filter = gr.fir_filter_fff(1, dsbsc_filter_coeffs)
rds_filter_coeffs = gr.firdes.band_pass(
1.0, # gain
sdr_rate, # sampling rate
57e3-3e3, # low cutoff
57e3+3e3, # high cutoff
3e3, # transition width
gr.firdes.WIN_HAMMING)
self.rds_filter = gr.fir_filter_fff(1, rds_filter_coeffs)
# print "# lpr filter:", len(lpr_filter_coeffs), "taps"
# print "# pilot filter:", len(pilot_filter_coeffs), "taps"
# print "# dsbsc filter:", len(dsbsc_filter_coeffs), "taps"
# print "# rds filter:", len(rds_filter_coeffs), "taps"
self.connect(self.fm_demod, self.lpr_filter)
self.connect(self.fm_demod, self.pilot_filter)
self.connect(self.fm_demod, self.dsbsc_filter)
self.connect(self.fm_demod, self.rds_filter)
# down-convert L-R, RDS
self.stereo_baseband = gr.multiply_ff()
self.connect(self.pilot_filter, (self.stereo_baseband, 0))
self.connect(self.pilot_filter, (self.stereo_baseband, 1))
self.connect(self.dsbsc_filter, (self.stereo_baseband, 2))
self.rds_baseband = gr.multiply_ff()
self.connect(self.pilot_filter, (self.rds_baseband, 0))
self.connect(self.pilot_filter, (self.rds_baseband, 1))
self.connect(self.pilot_filter, (self.rds_baseband, 2))
self.connect(self.rds_filter, (self.rds_baseband, 3))
# low-pass and downsample L-R
lmr_filter_coeffs = gr.firdes.low_pass(
1.0, # gain
sdr_rate, # sampling rate
15e3, # passband cutoff
1e3, # transition width
gr.firdes.WIN_HAMMING)
self.lmr_filter = gr.fir_filter_fff(audio_decim, lmr_filter_coeffs)
self.connect(self.stereo_baseband, self.lmr_filter)
# create L, R from L-R, L+R
self.left = gr.add_ff()
self.right = gr.sub_ff()
self.connect(self.lpr_filter, (self.left, 0))
self.connect(self.lmr_filter, (self.left, 1))
self.connect(self.lpr_filter, (self.right, 0))
self.connect(self.lmr_filter, (self.right, 1))
# volume control, complex2flot, audio sink
self.volume_control_l = gr.multiply_const_ff(self.vol)
self.volume_control_r = gr.multiply_const_ff(self.vol)
output_audio_rate = 48000
self.resamp_L = blks2.rational_resampler_fff(interpolation=output_audio_rate,decimation=audio_rate,taps=None,fractional_bw=None,)
self.resamp_R = blks2.rational_resampler_fff(interpolation=output_audio_rate,decimation=audio_rate,taps=None,fractional_bw=None,)
self.connect(self.left, self.volume_control_l, self.resamp_L)
self.connect(self.right, self.volume_control_r, self.resamp_R)
# self.audio_sink = audio.sink(int(output_audio_rate),
# options.audio_output, False)
# self.connect(self.resamp_L, (self.audio_sink, 0))
# self.connect(self.resamp_R, (self.audio_sink, 1))
self.file_sink1 = gr.file_sink(gr.sizeof_float, 'audioL.dat')
self.file_sink2 = gr.file_sink(gr.sizeof_float, 'audioR.dat')
self.file_sink3 = gr.file_sink(gr.sizeof_float, 'fmDemod.dat')
self.connect(self.resamp_L, self.file_sink1)
self.connect(self.resamp_R, self.file_sink2)
self.connect(self.fm_demod, self.file_sink3)
# low-pass the baseband RDS signal at 1.5kHz
rds_bb_filter_coeffs = gr.firdes.low_pass(
1, # gain
sdr_rate, # sampling rate
1.5e3, # passband cutoff
2e3, # transition width
gr.firdes.WIN_HAMMING)
self.rds_bb_filter = gr.fir_filter_fff(audio_decim, rds_bb_filter_coeffs)
# print "# rds bb filter:", len(rds_bb_filter_coeffs), "taps"
self.connect(self.rds_baseband, self.rds_bb_filter)
# 1187.5bps = 19kHz/16
self.clock_divider = rds.freq_divider(16)
rds_clock_taps = gr.firdes.low_pass(
1, # gain
sdr_rate, # sampling rate
1.2e3, # passband cutoff
1.5e3, # transition width
gr.firdes.WIN_HAMMING)
self.rds_clock = gr.fir_filter_fff(audio_decim, rds_clock_taps)
# print "# rds clock filter:", len(rds_clock_taps), "taps"
self.connect(self.pilot_filter, self.clock_divider, self.rds_clock)
# bpsk_demod, diff_decoder, rds_decoder
self.bpsk_demod = rds.bpsk_demod(audio_rate)
self.differential_decoder = gr.diff_decoder_bb(2)
self.msgq = gr.msg_queue()
self.rds_decoder = rds.data_decoder(self.msgq)
self.connect(self.rds_bb_filter, (self.bpsk_demod, 0))
self.connect(self.rds_clock, (self.bpsk_demod, 1))
self.connect(self.bpsk_demod, self.differential_decoder)
self.connect(self.differential_decoder, self.rds_decoder)
def __init__(self,frame,panel,vbox,argv):
stdgui2.std_top_block.__init__ (self,frame,panel,vbox,argv)
parser=OptionParser(option_class=eng_option)
parser.add_option("-R", "--rx-subdev-spec", type="subdev", default=None,
help="select USRP Rx side A or B (default=A)")
parser.add_option("-f", "--freq", type="eng_float", default=91.2e6,
help="set frequency to FREQ", metavar="FREQ")
parser.add_option("-g", "--gain", type="eng_float", default=None,
help="set gain in dB")
# FIXME add squelch
parser.add_option("-s", "--squelch", type="eng_float", default=0,
help="set squelch level (default is 0)")
parser.add_option("-V", "--volume", type="eng_float", default=None,
help="set volume (default is midpoint)")
parser.add_option("-O", "--audio-output", type="string", default="plughw:0,0",
help="pcm device name (default is plughw:0,0)")
# print help when called with wrong arguments
(options, args) = parser.parse_args()
if len(args) != 0:
parser.print_help()
sys.exit(1)
# connect to USRP
usrp_decim = 250
self.u = usrp.source_c(0, usrp_decim)
print "USRP Serial:", self.u.serial_number()
usrp_rate = self.u.adc_rate() / usrp_decim # 256 kS/s
print "usrp_rate =", usrp_rate
audio_decim = 8
audio_rate = usrp_rate / audio_decim # 32 kS/s
print "audio_rate =", audio_rate
#if options.rx_subdev_spec is None:
# options.rx_subdev_spec = usrp.pick_subdev(self.u, dblist)
self.u.set_mux(usrp.determine_rx_mux_value(self.u, options.rx_subdev_spec))
self.subdev = usrp.selected_subdev(self.u, options.rx_subdev_spec)
print "Using d'board", self.subdev.side_and_name()
# gain, volume, frequency
self.gain = options.gain
if options.gain is None:
g = self.subdev.gain_range()
self.gain = float(g[0]+g[1])/2
self.vol = options.volume
if self.vol is None:
g = self.volume_range()
self.vol = float(g[0]+g[1])/2
self.freq = options.freq
print "Volume:%r, Gain:%r, Freq:%3.1f MHz" % (self.vol, self.gain, self.freq/1e6)
# channel filter
chan_filter_coeffs = gr.firdes.low_pass(
1.0, # gain
usrp_rate, # sampling rate
80e3, # passband cutoff
35e3, # transition width
gr.firdes.WIN_HAMMING)
self.chan_filter = gr.fir_filter_ccf(1, chan_filter_coeffs)
print "# channel filter:", len(chan_filter_coeffs), "taps"
# PLL-based WFM demod
fm_alpha = 0.25 * 250e3 * math.pi / usrp_rate # 0.767
fm_beta = fm_alpha * fm_alpha / 4.0 # 0.147
fm_max_freq = 2.0 * math.pi * 90e3 / usrp_rate # 2.209
self.fm_demod = gr.pll_freqdet_cf(
#fm_alpha, # phase gain
#fm_beta, # freq gain
1.0, # Loop BW
fm_max_freq, # in radians/sample
-fm_max_freq)
self.fm_demod.set_alpha(fm_alpha)
self.fm_demod.set_beta(fm_beta)
self.connect(self.u, self.chan_filter, self.fm_demod)
# L+R, pilot, L-R, RDS filters
lpr_filter_coeffs = gr.firdes.low_pass(
1.0, # gain
usrp_rate, # sampling rate
15e3, # passband cutoff
1e3, # transition width
gr.firdes.WIN_HAMMING)
self.lpr_filter = gr.fir_filter_fff(audio_decim, lpr_filter_coeffs)
pilot_filter_coeffs = gr.firdes.band_pass(
1.0, # gain
usrp_rate, # sampling rate
19e3-500, # low cutoff
19e3+500, # high cutoff
1e3, # transition width
gr.firdes.WIN_HAMMING)
self.pilot_filter = gr.fir_filter_fff(1, pilot_filter_coeffs)
dsbsc_filter_coeffs = gr.firdes.band_pass(
1.0, # gain
usrp_rate, # sampling rate
38e3-15e3/2, # low cutoff
38e3+15e3/2, # high cutoff
1e3, # transition width
gr.firdes.WIN_HAMMING)
self.dsbsc_filter = gr.fir_filter_fff(1, dsbsc_filter_coeffs)
rds_filter_coeffs = gr.firdes.band_pass(
1.0, # gain
usrp_rate, # sampling rate
57e3-3e3, # low cutoff
57e3+3e3, # high cutoff
3e3, # transition width
gr.firdes.WIN_HAMMING)
self.rds_filter = gr.fir_filter_fff(1, rds_filter_coeffs)
print "# lpr filter:", len(lpr_filter_coeffs), "taps"
print "# pilot filter:", len(pilot_filter_coeffs), "taps"
print "# dsbsc filter:", len(dsbsc_filter_coeffs), "taps"
print "# rds filter:", len(rds_filter_coeffs), "taps"
self.connect(self.fm_demod, self.lpr_filter)
self.connect(self.fm_demod, self.pilot_filter)
self.connect(self.fm_demod, self.dsbsc_filter)
self.connect(self.fm_demod, self.rds_filter)
# down-convert L-R, RDS
self.stereo_baseband = gr.multiply_ff()
self.connect(self.pilot_filter, (self.stereo_baseband, 0))
self.connect(self.pilot_filter, (self.stereo_baseband, 1))
self.connect(self.dsbsc_filter, (self.stereo_baseband, 2))
self.rds_baseband = gr.multiply_ff()
self.connect(self.pilot_filter, (self.rds_baseband, 0))
self.connect(self.pilot_filter, (self.rds_baseband, 1))
self.connect(self.pilot_filter, (self.rds_baseband, 2))
self.connect(self.rds_filter, (self.rds_baseband, 3))
# low-pass and downsample L-R
lmr_filter_coeffs = gr.firdes.low_pass(
1.0, # gain
usrp_rate, # sampling rate
15e3, # passband cutoff
1e3, # transition width
gr.firdes.WIN_HAMMING)
self.lmr_filter = gr.fir_filter_fff(audio_decim, lmr_filter_coeffs)
self.connect(self.stereo_baseband, self.lmr_filter)
# create L, R from L-R, L+R
self.left = gr.add_ff()
self.right = gr.sub_ff()
self.connect(self.lpr_filter, (self.left, 0))
self.connect(self.lmr_filter, (self.left, 1))
self.connect(self.lpr_filter, (self.right, 0))
self.connect(self.lmr_filter, (self.right, 1))
# volume control, complex2flot, audio sink
self.volume_control_l = gr.multiply_const_ff(self.vol)
self.volume_control_r = gr.multiply_const_ff(self.vol)
output_audio_rate = 48000
self.audio_sink = audio.sink(int(output_audio_rate),
options.audio_output, False)
#self.connect(self.left, self.volume_control_l, (self.audio_sink, 0))
#self.connect(self.right, self.volume_control_r, (self.audio_sink, 1))
self.resamp_L = blks2.rational_resampler_fff(interpolation=output_audio_rate,decimation=audio_rate,taps=None,fractional_bw=None,)
self.resamp_R = blks2.rational_resampler_fff(interpolation=output_audio_rate,decimation=audio_rate,taps=None,fractional_bw=None,)
self.connect(self.left, self.volume_control_l, self.resamp_L, (self.audio_sink, 0))
self.connect(self.right, self.volume_control_r, self.resamp_R, (self.audio_sink, 1))
# low-pass the baseband RDS signal at 1.5kHz
rds_bb_filter_coeffs = gr.firdes.low_pass(
1, # gain
usrp_rate, # sampling rate
1.5e3, # passband cutoff
2e3, # transition width
gr.firdes.WIN_HAMMING)
self.rds_bb_filter = gr.fir_filter_fff(audio_decim, rds_bb_filter_coeffs)
print "# rds bb filter:", len(rds_bb_filter_coeffs), "taps"
self.connect(self.rds_baseband, self.rds_bb_filter)
# 1187.5bps = 19kHz/16
self.clock_divider = rds.freq_divider(16)
rds_clock_taps = gr.firdes.low_pass(
1, # gain
usrp_rate, # sampling rate
1.2e3, # passband cutoff
1.5e3, # transition width
gr.firdes.WIN_HAMMING)
self.rds_clock = gr.fir_filter_fff(audio_decim, rds_clock_taps)
print "# rds clock filter:", len(rds_clock_taps), "taps"
self.connect(self.pilot_filter, self.clock_divider, self.rds_clock)
# bpsk_demod, diff_decoder, rds_decoder
self.bpsk_demod = rds.bpsk_demod(audio_rate)
self.differential_decoder = gr.diff_decoder_bb(2)
self.msgq = gr.msg_queue()
self.rds_decoder = rds.data_decoder(self.msgq)
self.connect(self.rds_bb_filter, (self.bpsk_demod, 0))
self.connect(self.rds_clock, (self.bpsk_demod, 1))
self.connect(self.bpsk_demod, self.differential_decoder)
self.connect(self.differential_decoder, self.rds_decoder)
self.frame = frame
self.panel = panel
self._build_gui(vbox, usrp_rate, audio_rate)
self.set_gain(self.gain)
self.set_vol(self.vol)
if not(self.set_freq(self.freq)):
self._set_status_msg("Failed to set initial frequency")
def __init__(self):
gr.top_block.__init__ (self)
parser=OptionParser(option_class=eng_option)
parser.add_option("-H", "--hostname", type="string", default="localhost",
help="set hostname of generic sdr")
parser.add_option("-P", "--portnum", type="int", default=None,
help="set portnum of generic sdr")
parser.add_option("-W", "--wsportnum", type="int", default=None,
help="set portnum of audio websocket server")
parser.add_option("-r", "--sdr_rate", type="eng_float", default=250e3,
help="set sample rate of generic sdr")
parser.add_option("-V", "--volume", type="eng_float", default=None,
help="set volume (default is midpoint)")
parser.add_option("-O", "--audio-output", type="string", default="plughw:0,0",
help="pcm device name (default is plughw:0,0)")
# print help when called with wrong arguments
(options, args) = parser.parse_args()
if len(args) != 0:
parser.print_help()
sys.exit(1)
self.vol = options.volume
if self.vol is None:
self.vol = 0.1
# connect to generic SDR
sdr_rate = options.sdr_rate
audio_decim = 8
audio_rate = int(sdr_rate/audio_decim)
print "audio_rate = ", audio_rate
self.interleaved_short_to_complex = gr.interleaved_short_to_complex()
self.char_to_short = gr.char_to_short(1)
self.sdr_source = grc_blks2.tcp_source(
itemsize=gr.sizeof_char*1,
addr=options.hostname,
port=options.portnum,
server=False
)
# self.sdr_source = gr.file_source(1, 'sdrs_baseband.dat')
# self.throttle = gr.throttle(1, 500e3)
# self.connect(self.sdr_source, self.file_sink)
self.logger = gr.file_sink(1, 'log.out')
self.connect(self.sdr_source, self.logger)
# channel filter
chan_filter_coeffs = gr.firdes.low_pass(
1.0, # gain
sdr_rate, # sampling rate
80e3, # passband cutoff
35e3, # transition width
gr.firdes.WIN_HAMMING)
self.chan_filter = gr.fir_filter_ccf(1, chan_filter_coeffs)
# print "# channel filter:", len(chan_filter_coeffs), "taps"
# PLL-based WFM demod
fm_alpha = 0.25 * 250e3 * math.pi / sdr_rate # 0.767
fm_beta = fm_alpha * fm_alpha / 4.0 # 0.147
fm_max_freq = 2.0 * math.pi * 90e3 / sdr_rate # 2.209
self.fm_demod = gr.pll_freqdet_cf(
1.0, # Loop BW
fm_max_freq, # in radians/sample
-fm_max_freq)
self.fm_demod.set_alpha(fm_alpha)
self.fm_demod.set_beta(fm_beta)
self.connect(self.sdr_source, self.char_to_short)
self.connect(self.char_to_short, self.interleaved_short_to_complex)
self.connect(self.interleaved_short_to_complex, self.chan_filter, self.fm_demod)
# L+R, pilot, L-R, RDS filters
lpr_filter_coeffs = gr.firdes.low_pass(
1.0, # gain
sdr_rate, # sampling rate
15e3, # passband cutoff
1e3, # transition width
gr.firdes.WIN_HAMMING)
self.lpr_filter = gr.fir_filter_fff(audio_decim, lpr_filter_coeffs)
pilot_filter_coeffs = gr.firdes.band_pass(
1.0, # gain
sdr_rate, # sampling rate
19e3-500, # low cutoff
19e3+500, # high cutoff
1e3, # transition width
gr.firdes.WIN_HAMMING)
self.pilot_filter = gr.fir_filter_fff(1, pilot_filter_coeffs)
dsbsc_filter_coeffs = gr.firdes.band_pass(
1.0, # gain
sdr_rate, # sampling rate
38e3-15e3/2, # low cutoff
38e3+15e3/2, # high cutoff
1e3, # transition width
gr.firdes.WIN_HAMMING)
self.dsbsc_filter = gr.fir_filter_fff(1, dsbsc_filter_coeffs)
rds_filter_coeffs = gr.firdes.band_pass(
1.0, # gain
sdr_rate, # sampling rate
57e3-3e3, # low cutoff
57e3+3e3, # high cutoff
3e3, # transition width
gr.firdes.WIN_HAMMING)
self.rds_filter = gr.fir_filter_fff(1, rds_filter_coeffs)
# print "# lpr filter:", len(lpr_filter_coeffs), "taps"
# print "# pilot filter:", len(pilot_filter_coeffs), "taps"
# print "# dsbsc filter:", len(dsbsc_filter_coeffs), "taps"
# print "# rds filter:", len(rds_filter_coeffs), "taps"
self.connect(self.fm_demod, self.lpr_filter)
self.connect(self.fm_demod, self.pilot_filter)
self.connect(self.fm_demod, self.dsbsc_filter)
self.connect(self.fm_demod, self.rds_filter)
# down-convert L-R, RDS
self.stereo_baseband = gr.multiply_ff()
self.connect(self.pilot_filter, (self.stereo_baseband, 0))
self.connect(self.pilot_filter, (self.stereo_baseband, 1))
self.connect(self.dsbsc_filter, (self.stereo_baseband, 2))
self.rds_baseband = gr.multiply_ff()
self.connect(self.pilot_filter, (self.rds_baseband, 0))
self.connect(self.pilot_filter, (self.rds_baseband, 1))
self.connect(self.pilot_filter, (self.rds_baseband, 2))
self.connect(self.rds_filter, (self.rds_baseband, 3))
# low-pass and downsample L-R
lmr_filter_coeffs = gr.firdes.low_pass(
1.0, # gain
sdr_rate, # sampling rate
15e3, # passband cutoff
1e3, # transition width
gr.firdes.WIN_HAMMING)
self.lmr_filter = gr.fir_filter_fff(audio_decim, lmr_filter_coeffs)
self.connect(self.stereo_baseband, self.lmr_filter)
# create L, R from L-R, L+R
self.left = gr.add_ff()
self.right = gr.sub_ff()
self.connect(self.lpr_filter, (self.left, 0))
self.connect(self.lmr_filter, (self.left, 1))
self.connect(self.lpr_filter, (self.right, 0))
self.connect(self.lmr_filter, (self.right, 1))
# volume control, complex2flot, audio sink
self.volume_control_l = gr.multiply_const_ff(self.vol)
self.volume_control_r = gr.multiply_const_ff(self.vol)
output_audio_rate = 48000
self.resamp_L = blks2.rational_resampler_fff(interpolation=output_audio_rate,decimation=audio_rate,taps=None,fractional_bw=None,)
self.resamp_R = blks2.rational_resampler_fff(interpolation=output_audio_rate,decimation=audio_rate,taps=None,fractional_bw=None,)
self.connect(self.left, self.volume_control_l, self.resamp_L)
self.connect(self.right, self.volume_control_r, self.resamp_R)
# self.audio_sink = audio.sink(int(output_audio_rate),
# options.audio_output, False)
# self.connect(self.resamp_L, (self.audio_sink, 0))
# self.connect(self.resamp_R, (self.audio_sink, 1))
# self.file_sink1 = gr.file_sink(gr.sizeof_float, 'audioL.dat')
# self.file_sink2 = gr.file_sink(gr.sizeof_float, 'audioR.dat')
# self.file_sink3 = gr.file_sink(gr.sizeof_float, 'fmDemod.dat')
# self.connect(self.resamp_L, self.file_sink1)
# self.connect(self.resamp_R, self.file_sink2)
# self.connect(self.fm_demod, self.file_sink3)
# Interleave both channels so that we can push over one websocket connection
self.audio_interleaver = gr.float_to_complex(1)
self.connect(self.resamp_L, (self.audio_interleaver, 0))
self.connect(self.resamp_R, (self.audio_interleaver, 1))
self.ws_audio_server = sdrportal.ws_sink_c(True, options.wsportnum, "FLOAT")
self.connect(self.audio_interleaver, self.ws_audio_server)
# low-pass the baseband RDS signal at 1.5kHz
rds_bb_filter_coeffs = gr.firdes.low_pass(
1, # gain
sdr_rate, # sampling rate
1.5e3, # passband cutoff
2e3, # transition width
gr.firdes.WIN_HAMMING)
self.rds_bb_filter = gr.fir_filter_fff(audio_decim, rds_bb_filter_coeffs)
# print "# rds bb filter:", len(rds_bb_filter_coeffs), "taps"
self.connect(self.rds_baseband, self.rds_bb_filter)
# 1187.5bps = 19kHz/16
self.clock_divider = rds.freq_divider(16)
rds_clock_taps = gr.firdes.low_pass(
1, # gain
sdr_rate, # sampling rate
1.2e3, # passband cutoff
1.5e3, # transition width
gr.firdes.WIN_HAMMING)
self.rds_clock = gr.fir_filter_fff(audio_decim, rds_clock_taps)
# print "# rds clock filter:", len(rds_clock_taps), "taps"
self.connect(self.pilot_filter, self.clock_divider, self.rds_clock)
# bpsk_demod, diff_decoder, rds_decoder
self.bpsk_demod = rds.bpsk_demod(audio_rate)
self.differential_decoder = gr.diff_decoder_bb(2)
self.msgq = gr.msg_queue()
self.rds_decoder = rds.data_decoder(self.msgq)
self.connect(self.rds_bb_filter, (self.bpsk_demod, 0))
self.connect(self.rds_clock, (self.bpsk_demod, 1))
self.connect(self.bpsk_demod, self.differential_decoder)
self.connect(self.differential_decoder, self.rds_decoder)
def __init__(self):
grc_wxgui.top_block_gui.__init__(
self, title="Stereo FM receiver and RDS Decoder")
##################################################
# Variables
##################################################
self.xlate_decim = xlate_decim = 4
self.samp_rate = samp_rate = 1000000
self.freq_offset = freq_offset = 250e3
self.freq = freq = 88.5e6
self.baseband_rate = baseband_rate = samp_rate / xlate_decim
self.audio_decim = audio_decim = 4
self.xlate_bandwidth = xlate_bandwidth = 250e3
self.volume = volume = 0
self.loop_bw = loop_bw = 16e3 * 0 + 18e3 * 1
self.gain = gain = 10
self.freq_tune = freq_tune = freq - freq_offset
self.audio_rate = audio_rate = 48000
self.audio_decim_rate = audio_decim_rate = baseband_rate / audio_decim
self.antenna = antenna = 'TX/RX'
##################################################
# Message Queues
##################################################
gr_rds_data_decoder_0_msgq_out = gr_rds_panel_0_msgq_in = gr.msg_queue(
2)
##################################################
# Blocks
##################################################
_volume_sizer = wx.BoxSizer(wx.VERTICAL)
self._volume_text_box = forms.text_box(
parent=self.GetWin(),
sizer=_volume_sizer,
value=self.volume,
callback=self.set_volume,
label="Volume",
converter=forms.float_converter(),
proportion=0,
)
self._volume_slider = forms.slider(
parent=self.GetWin(),
sizer=_volume_sizer,
value=self.volume,
callback=self.set_volume,
minimum=-20,
maximum=10,
num_steps=300,
style=wx.SL_HORIZONTAL,
cast=float,
proportion=1,
)
self.Add(_volume_sizer)
self.nb = self.nb = wx.Notebook(self.GetWin(), style=wx.NB_TOP)
self.nb.AddPage(grc_wxgui.Panel(self.nb), "BB")
self.nb.AddPage(grc_wxgui.Panel(self.nb), "Demod")
self.nb.AddPage(grc_wxgui.Panel(self.nb), "L+R")
self.nb.AddPage(grc_wxgui.Panel(self.nb), "Pilot")
self.nb.AddPage(grc_wxgui.Panel(self.nb), "DSBSC")
self.nb.AddPage(grc_wxgui.Panel(self.nb), "RDS Raw")
self.nb.AddPage(grc_wxgui.Panel(self.nb), "L-R")
self.nb.AddPage(grc_wxgui.Panel(self.nb), "RDS")
self.Add(self.nb)
_loop_bw_sizer = wx.BoxSizer(wx.VERTICAL)
self._loop_bw_text_box = forms.text_box(
parent=self.GetWin(),
sizer=_loop_bw_sizer,
value=self.loop_bw,
callback=self.set_loop_bw,
label="Loop BW",
converter=forms.float_converter(),
proportion=0,
)
self._loop_bw_slider = forms.slider(
parent=self.GetWin(),
sizer=_loop_bw_sizer,
value=self.loop_bw,
callback=self.set_loop_bw,
minimum=0,
maximum=baseband_rate,
num_steps=1000,
style=wx.SL_HORIZONTAL,
cast=float,
proportion=1,
)
self.Add(_loop_bw_sizer)
_gain_sizer = wx.BoxSizer(wx.VERTICAL)
self._gain_text_box = forms.text_box(
parent=self.GetWin(),
sizer=_gain_sizer,
value=self.gain,
callback=self.set_gain,
label="Gain",
converter=forms.float_converter(),
proportion=0,
)
self._gain_slider = forms.slider(
parent=self.GetWin(),
sizer=_gain_sizer,
value=self.gain,
callback=self.set_gain,
minimum=0,
maximum=50,
num_steps=50,
style=wx.SL_HORIZONTAL,
cast=float,
proportion=1,
)
self.Add(_gain_sizer)
self._freq_offset_text_box = forms.text_box(
parent=self.GetWin(),
value=self.freq_offset,
callback=self.set_freq_offset,
label="Freq Offset",
converter=forms.float_converter(),
)
self.Add(self._freq_offset_text_box)
_freq_sizer = wx.BoxSizer(wx.VERTICAL)
self._freq_text_box = forms.text_box(
parent=self.GetWin(),
sizer=_freq_sizer,
value=self.freq,
callback=self.set_freq,
label="Freq",
converter=forms.float_converter(),
proportion=0,
)
self._freq_slider = forms.slider(
parent=self.GetWin(),
sizer=_freq_sizer,
value=self.freq,
callback=self.set_freq,
minimum=87.5e6,
maximum=108e6,
num_steps=205,
style=wx.SL_HORIZONTAL,
cast=float,
proportion=1,
)
self.Add(_freq_sizer)
self._antenna_chooser = forms.drop_down(
parent=self.GetWin(),
value=self.antenna,
callback=self.set_antenna,
label="Antenna",
choices=['TX/RX', 'RX2'],
labels=[],
)
self.Add(self._antenna_chooser)
self.wxgui_scopesink2_0 = scopesink2.scope_sink_f(
self.nb.GetPage(3).GetWin(),
title="Pilot",
sample_rate=baseband_rate,
v_scale=0,
v_offset=0,
t_scale=0,
ac_couple=False,
xy_mode=False,
num_inputs=1,
trig_mode=gr.gr_TRIG_MODE_AUTO,
y_axis_label="Counts",
)
self.nb.GetPage(3).Add(self.wxgui_scopesink2_0.win)
self.wxgui_fftsink2_0_0_0_1_0_1 = fftsink2.fft_sink_f(
self.nb.GetPage(7).GetWin(),
baseband_freq=0,
y_per_div=10,
y_divs=10,
ref_level=-50,
ref_scale=2.0,
sample_rate=baseband_rate,
fft_size=1024,
fft_rate=15,
average=False,
avg_alpha=None,
title="RDS",
peak_hold=False,
)
self.nb.GetPage(7).Add(self.wxgui_fftsink2_0_0_0_1_0_1.win)
self.wxgui_fftsink2_0_0_0_1_0_0 = fftsink2.fft_sink_f(
self.nb.GetPage(6).GetWin(),
baseband_freq=0,
y_per_div=10,
y_divs=10,
ref_level=-50,
ref_scale=2.0,
sample_rate=baseband_rate,
fft_size=1024,
fft_rate=15,
average=False,
avg_alpha=None,
title="L-R",
peak_hold=False,
)
self.nb.GetPage(6).Add(self.wxgui_fftsink2_0_0_0_1_0_0.win)
self.wxgui_fftsink2_0_0_0_1_0 = fftsink2.fft_sink_f(
self.nb.GetPage(5).GetWin(),
baseband_freq=0,
y_per_div=10,
y_divs=10,
ref_level=0,
ref_scale=2.0,
sample_rate=baseband_rate,
fft_size=1024,
fft_rate=15,
average=False,
avg_alpha=None,
title="RDS",
peak_hold=False,
)
self.nb.GetPage(5).Add(self.wxgui_fftsink2_0_0_0_1_0.win)
self.wxgui_fftsink2_0_0_0_1 = fftsink2.fft_sink_f(
self.nb.GetPage(4).GetWin(),
baseband_freq=0,
y_per_div=10,
y_divs=10,
ref_level=0,
ref_scale=2.0,
sample_rate=baseband_rate,
fft_size=1024,
fft_rate=15,
average=False,
avg_alpha=None,
title="DSBSC Sub-carrier",
peak_hold=False,
)
self.nb.GetPage(4).Add(self.wxgui_fftsink2_0_0_0_1.win)
self.wxgui_fftsink2_0_0_0 = fftsink2.fft_sink_f(
self.nb.GetPage(2).GetWin(),
baseband_freq=0,
y_per_div=10,
y_divs=10,
ref_level=0,
ref_scale=2.0,
sample_rate=audio_decim_rate,
fft_size=1024,
fft_rate=15,
average=False,
avg_alpha=None,
title="L+R",
peak_hold=False,
)
self.nb.GetPage(2).Add(self.wxgui_fftsink2_0_0_0.win)
self.wxgui_fftsink2_0_0 = fftsink2.fft_sink_f(
self.nb.GetPage(1).GetWin(),
baseband_freq=0,
y_per_div=10,
y_divs=10,
ref_level=0,
ref_scale=2.0,
sample_rate=baseband_rate,
fft_size=1024,
fft_rate=15,
average=True,
avg_alpha=0.8,
title="FM Demod",
peak_hold=False,
)
self.nb.GetPage(1).Add(self.wxgui_fftsink2_0_0.win)
self.wxgui_fftsink2_0 = fftsink2.fft_sink_c(
self.nb.GetPage(0).GetWin(),
baseband_freq=0,
y_per_div=10,
y_divs=10,
ref_level=-30,
ref_scale=2.0,
sample_rate=baseband_rate,
fft_size=1024,
fft_rate=15,
average=True,
avg_alpha=0.8,
title="Baseband",
peak_hold=False,
)
self.nb.GetPage(0).Add(self.wxgui_fftsink2_0.win)
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(freq_tune, 0)
self.uhd_usrp_source_0.set_gain(gain, 0)
self.uhd_usrp_source_0.set_antenna(antenna, 0)
self.gr_rds_panel_0 = rds.rdsPanel(gr_rds_panel_0_msgq_in, freq,
self.GetWin())
self.Add(self.gr_rds_panel_0)
self.gr_rds_freq_divider_0 = rds.freq_divider(16)
self.gr_rds_data_decoder_0 = rds.data_decoder(
gr_rds_data_decoder_0_msgq_out)
self.gr_rds_bpsk_demod_0 = rds.bpsk_demod(audio_decim_rate)
self.gr_pll_freqdet_cf_0 = gr.pll_freqdet_cf(
1.0 * 0 + (loop_bw * 2 * math.pi / baseband_rate),
+(2.0 * math.pi * 90e3 / baseband_rate),
-(2.0 * math.pi * 90e3 / baseband_rate))
self.gr_multiply_const_vxx_0_0 = gr.multiply_const_vff(
(10**(1. * volume / 10), ))
self.gr_multiply_const_vxx_0 = gr.multiply_const_vff(
(10**(1. * volume / 10), ))
self.freq_xlating_fir_filter_xxx_0 = filter.freq_xlating_fir_filter_ccc(
xlate_decim,
(firdes.low_pass(1, samp_rate, xlate_bandwidth / 2, 1000)),
freq_offset, samp_rate)
self.fir_filter_xxx_7 = filter.fir_filter_fff(
audio_decim, (firdes.low_pass(1, baseband_rate, 1.2e3, 1.5e3,
firdes.WIN_HAMMING)))
self.fir_filter_xxx_6 = filter.fir_filter_fff(
audio_decim, (firdes.low_pass(1, baseband_rate, 1.5e3, 2e3,
firdes.WIN_HAMMING)))
self.fir_filter_xxx_5 = filter.fir_filter_fff(
audio_decim, (firdes.low_pass(1.0, baseband_rate, 15e3, 1e3,
firdes.WIN_HAMMING)))
self.fir_filter_xxx_4 = filter.fir_filter_fff(
1, (firdes.band_pass(1.0, baseband_rate, 57e3 - 3e3, 57e3 + 3e3,
3e3, firdes.WIN_HAMMING)))
self.fir_filter_xxx_3 = filter.fir_filter_fff(
1, (firdes.band_pass(1.0, baseband_rate, 38e3 - 15e3 / 2,
38e3 + 15e3 / 2, 1e3, firdes.WIN_HAMMING)))
self.fir_filter_xxx_2 = filter.fir_filter_fff(
1, (firdes.band_pass(1.0, baseband_rate, 19e3 - 500, 19e3 + 500,
1e3, firdes.WIN_HAMMING)))
self.fir_filter_xxx_1 = filter.fir_filter_fff(
audio_decim, (firdes.low_pass(1.0, baseband_rate, 15e3, 1e3,
firdes.WIN_HAMMING)))
self.fir_filter_xxx_0 = filter.fir_filter_ccc(1, (firdes.low_pass(
1.0, baseband_rate, 80e3, 35e3, firdes.WIN_HAMMING)))
self.digital_diff_decoder_bb_0 = digital.diff_decoder_bb(2)
self.blocks_sub_xx_0 = blocks.sub_ff(1)
self.blocks_multiply_xx_0_0 = blocks.multiply_vff(1)
self.blocks_multiply_xx_0 = blocks.multiply_vff(1)
self.blocks_add_xx_0 = blocks.add_vff(1)
self.blks2_rational_resampler_xxx_0_0 = blks2.rational_resampler_fff(
interpolation=audio_rate,
decimation=audio_decim_rate,
taps=None,
fractional_bw=None,
)
self.blks2_rational_resampler_xxx_0 = blks2.rational_resampler_fff(
interpolation=audio_rate,
decimation=audio_decim_rate,
taps=None,
fractional_bw=None,
)
self.blks2_fm_deemph_0_0_0 = blks2.fm_deemph(fs=baseband_rate,
tau=75e-6)
self.blks2_fm_deemph_0_0 = blks2.fm_deemph(fs=baseband_rate, tau=75e-6)
self.audio_sink_0 = audio.sink(audio_rate, "", True)
##################################################
# Connections
##################################################
self.connect((self.uhd_usrp_source_0, 0),
(self.freq_xlating_fir_filter_xxx_0, 0))
self.connect((self.freq_xlating_fir_filter_xxx_0, 0),
(self.fir_filter_xxx_0, 0))
self.connect((self.fir_filter_xxx_0, 0), (self.gr_pll_freqdet_cf_0, 0))
self.connect((self.gr_pll_freqdet_cf_0, 0), (self.fir_filter_xxx_1, 0))
self.connect((self.gr_pll_freqdet_cf_0, 0), (self.fir_filter_xxx_2, 0))
self.connect((self.gr_pll_freqdet_cf_0, 0), (self.fir_filter_xxx_4, 0))
self.connect((self.fir_filter_xxx_2, 0),
(self.blocks_multiply_xx_0, 0))
self.connect((self.fir_filter_xxx_2, 0),
(self.blocks_multiply_xx_0, 1))
self.connect((self.fir_filter_xxx_2, 0),
(self.blocks_multiply_xx_0_0, 0))
self.connect((self.fir_filter_xxx_2, 0),
(self.blocks_multiply_xx_0_0, 1))
self.connect((self.fir_filter_xxx_3, 0),
(self.blocks_multiply_xx_0, 2))
self.connect((self.fir_filter_xxx_4, 0),
(self.blocks_multiply_xx_0_0, 3))
self.connect((self.fir_filter_xxx_2, 0),
(self.blocks_multiply_xx_0_0, 2))
self.connect((self.freq_xlating_fir_filter_xxx_0, 0),
(self.wxgui_fftsink2_0, 0))
self.connect((self.fir_filter_xxx_1, 0), (self.blocks_sub_xx_0, 0))
self.connect((self.fir_filter_xxx_2, 0),
(self.gr_rds_freq_divider_0, 0))
self.connect((self.fir_filter_xxx_1, 0), (self.blocks_add_xx_0, 0))
self.connect((self.blocks_multiply_xx_0, 0),
(self.fir_filter_xxx_5, 0))
self.connect((self.gr_pll_freqdet_cf_0, 0), (self.fir_filter_xxx_3, 0))
self.connect((self.gr_multiply_const_vxx_0, 0),
(self.blks2_rational_resampler_xxx_0, 0))
self.connect((self.blks2_rational_resampler_xxx_0, 0),
(self.audio_sink_0, 0))
self.connect((self.blks2_rational_resampler_xxx_0_0, 0),
(self.audio_sink_0, 1))
self.connect((self.gr_multiply_const_vxx_0_0, 0),
(self.blks2_rational_resampler_xxx_0_0, 0))
self.connect((self.gr_rds_freq_divider_0, 0),
(self.fir_filter_xxx_7, 0))
self.connect((self.fir_filter_xxx_7, 0), (self.gr_rds_bpsk_demod_0, 1))
self.connect((self.digital_diff_decoder_bb_0, 0),
(self.gr_rds_data_decoder_0, 0))
self.connect((self.gr_rds_bpsk_demod_0, 0),
(self.digital_diff_decoder_bb_0, 0))
self.connect((self.fir_filter_xxx_6, 0), (self.gr_rds_bpsk_demod_0, 0))
self.connect((self.fir_filter_xxx_2, 0), (self.wxgui_scopesink2_0, 0))
self.connect((self.fir_filter_xxx_1, 0),
(self.wxgui_fftsink2_0_0_0, 0))
self.connect((self.fir_filter_xxx_3, 0),
(self.wxgui_fftsink2_0_0_0_1, 0))
self.connect((self.fir_filter_xxx_4, 0),
(self.wxgui_fftsink2_0_0_0_1_0, 0))
self.connect((self.blocks_multiply_xx_0_0, 0),
(self.fir_filter_xxx_6, 0))
self.connect((self.blocks_multiply_xx_0, 0),
(self.wxgui_fftsink2_0_0_0_1_0_0, 0))
self.connect((self.fir_filter_xxx_5, 0), (self.blocks_add_xx_0, 1))
self.connect((self.fir_filter_xxx_5, 0), (self.blocks_sub_xx_0, 1))
self.connect((self.blocks_multiply_xx_0_0, 0),
(self.wxgui_fftsink2_0_0_0_1_0_1, 0))
self.connect((self.blocks_sub_xx_0, 0), (self.blks2_fm_deemph_0_0, 0))
self.connect((self.blks2_fm_deemph_0_0, 0),
(self.gr_multiply_const_vxx_0_0, 0))
self.connect((self.blocks_add_xx_0, 0),
(self.blks2_fm_deemph_0_0_0, 0))
self.connect((self.blks2_fm_deemph_0_0_0, 0),
(self.gr_multiply_const_vxx_0, 0))
self.connect((self.gr_pll_freqdet_cf_0, 0),
(self.wxgui_fftsink2_0_0, 0))
def __init__(self):
grc_wxgui.top_block_gui.__init__(self, title="Stereo FM receiver and RDS Decoder")
_icon_path = "/usr/share/icons/hicolor/32x32/apps/gnuradio-grc.png"
self.SetIcon(wx.Icon(_icon_path, wx.BITMAP_TYPE_ANY))
##################################################
# Variables
##################################################
self.xlate_decim = xlate_decim = 4
self.samp_rate = samp_rate = 1000000
self.freq_offset = freq_offset = 250e3
self.freq = freq = 88.5e6
self.baseband_rate = baseband_rate = samp_rate/xlate_decim
self.audio_decim = audio_decim = 4
self.xlate_bandwidth = xlate_bandwidth = 250e3
self.volume = volume = 0
self.loop_bw = loop_bw = 16e3*0 + 18e3*1
self.gain = gain = 10
self.freq_tune = freq_tune = freq - freq_offset
self.audio_rate = audio_rate = 48000
self.audio_decim_rate = audio_decim_rate = baseband_rate/audio_decim
self.antenna = antenna = 'TX/RX'
##################################################
# Message Queues
##################################################
gr_rds_data_decoder_0_msgq_out = gr_rds_panel_0_msgq_in = gr.msg_queue(2)
##################################################
# Blocks
##################################################
_volume_sizer = wx.BoxSizer(wx.VERTICAL)
self._volume_text_box = forms.text_box(
parent=self.GetWin(),
sizer=_volume_sizer,
value=self.volume,
callback=self.set_volume,
label="Volume",
converter=forms.float_converter(),
proportion=0,
)
self._volume_slider = forms.slider(
parent=self.GetWin(),
sizer=_volume_sizer,
value=self.volume,
callback=self.set_volume,
minimum=-20,
maximum=10,
num_steps=300,
style=wx.SL_HORIZONTAL,
cast=float,
proportion=1,
)
self.Add(_volume_sizer)
self.nb = self.nb = wx.Notebook(self.GetWin(), style=wx.NB_TOP)
self.nb.AddPage(grc_wxgui.Panel(self.nb), "BB")
self.nb.AddPage(grc_wxgui.Panel(self.nb), "Demod")
self.nb.AddPage(grc_wxgui.Panel(self.nb), "L+R")
self.nb.AddPage(grc_wxgui.Panel(self.nb), "Pilot")
self.nb.AddPage(grc_wxgui.Panel(self.nb), "DSBSC")
self.nb.AddPage(grc_wxgui.Panel(self.nb), "RDS Raw")
self.nb.AddPage(grc_wxgui.Panel(self.nb), "L-R")
self.nb.AddPage(grc_wxgui.Panel(self.nb), "RDS")
self.Add(self.nb)
_loop_bw_sizer = wx.BoxSizer(wx.VERTICAL)
self._loop_bw_text_box = forms.text_box(
parent=self.GetWin(),
sizer=_loop_bw_sizer,
value=self.loop_bw,
callback=self.set_loop_bw,
label="Loop BW",
converter=forms.float_converter(),
proportion=0,
)
self._loop_bw_slider = forms.slider(
parent=self.GetWin(),
sizer=_loop_bw_sizer,
value=self.loop_bw,
callback=self.set_loop_bw,
minimum=0,
maximum=baseband_rate,
num_steps=1000,
style=wx.SL_HORIZONTAL,
cast=float,
proportion=1,
)
self.Add(_loop_bw_sizer)
_gain_sizer = wx.BoxSizer(wx.VERTICAL)
self._gain_text_box = forms.text_box(
parent=self.GetWin(),
sizer=_gain_sizer,
value=self.gain,
callback=self.set_gain,
label="Gain",
converter=forms.float_converter(),
proportion=0,
)
self._gain_slider = forms.slider(
parent=self.GetWin(),
sizer=_gain_sizer,
value=self.gain,
callback=self.set_gain,
minimum=0,
maximum=50,
num_steps=50,
style=wx.SL_HORIZONTAL,
cast=float,
proportion=1,
)
self.Add(_gain_sizer)
self._freq_offset_text_box = forms.text_box(
parent=self.GetWin(),
value=self.freq_offset,
callback=self.set_freq_offset,
label="Freq Offset",
converter=forms.float_converter(),
)
self.Add(self._freq_offset_text_box)
_freq_sizer = wx.BoxSizer(wx.VERTICAL)
self._freq_text_box = forms.text_box(
parent=self.GetWin(),
sizer=_freq_sizer,
value=self.freq,
callback=self.set_freq,
label="Freq",
converter=forms.float_converter(),
proportion=0,
)
self._freq_slider = forms.slider(
parent=self.GetWin(),
sizer=_freq_sizer,
value=self.freq,
callback=self.set_freq,
minimum=87.5e6,
maximum=108e6,
num_steps=205,
style=wx.SL_HORIZONTAL,
cast=float,
proportion=1,
)
self.Add(_freq_sizer)
self._antenna_chooser = forms.drop_down(
parent=self.GetWin(),
value=self.antenna,
callback=self.set_antenna,
label="Antenna",
choices=['TX/RX', 'RX2'],
labels=[],
)
self.Add(self._antenna_chooser)
self.wxgui_scopesink2_0 = scopesink2.scope_sink_f(
self.nb.GetPage(3).GetWin(),
title="Pilot",
sample_rate=baseband_rate,
v_scale=0,
v_offset=0,
t_scale=0,
ac_couple=False,
xy_mode=False,
num_inputs=1,
trig_mode=wxgui.TRIG_MODE_AUTO,
y_axis_label="Counts",
)
self.nb.GetPage(3).Add(self.wxgui_scopesink2_0.win)
self.wxgui_fftsink2_0_0_0_1_0_1 = fftsink2.fft_sink_f(
self.nb.GetPage(7).GetWin(),
baseband_freq=0,
y_per_div=10,
y_divs=10,
ref_level=-50,
ref_scale=2.0,
sample_rate=baseband_rate,
fft_size=1024,
fft_rate=15,
average=False,
avg_alpha=None,
title="RDS",
peak_hold=False,
)
self.nb.GetPage(7).Add(self.wxgui_fftsink2_0_0_0_1_0_1.win)
self.wxgui_fftsink2_0_0_0_1_0_0 = fftsink2.fft_sink_f(
self.nb.GetPage(6).GetWin(),
baseband_freq=0,
y_per_div=10,
y_divs=10,
ref_level=-50,
ref_scale=2.0,
sample_rate=baseband_rate,
fft_size=1024,
fft_rate=15,
average=False,
avg_alpha=None,
title="L-R",
peak_hold=False,
)
self.nb.GetPage(6).Add(self.wxgui_fftsink2_0_0_0_1_0_0.win)
self.wxgui_fftsink2_0_0_0_1_0 = fftsink2.fft_sink_f(
self.nb.GetPage(5).GetWin(),
baseband_freq=0,
y_per_div=10,
y_divs=10,
ref_level=0,
ref_scale=2.0,
sample_rate=baseband_rate,
fft_size=1024,
fft_rate=15,
average=False,
avg_alpha=None,
title="RDS",
peak_hold=False,
)
self.nb.GetPage(5).Add(self.wxgui_fftsink2_0_0_0_1_0.win)
self.wxgui_fftsink2_0_0_0_1 = fftsink2.fft_sink_f(
self.nb.GetPage(4).GetWin(),
baseband_freq=0,
y_per_div=10,
y_divs=10,
ref_level=0,
ref_scale=2.0,
sample_rate=baseband_rate,
fft_size=1024,
fft_rate=15,
average=False,
avg_alpha=None,
title="DSBSC Sub-carrier",
peak_hold=False,
)
self.nb.GetPage(4).Add(self.wxgui_fftsink2_0_0_0_1.win)
self.wxgui_fftsink2_0_0_0 = fftsink2.fft_sink_f(
self.nb.GetPage(2).GetWin(),
baseband_freq=0,
y_per_div=10,
y_divs=10,
ref_level=0,
ref_scale=2.0,
sample_rate=audio_decim_rate,
fft_size=1024,
fft_rate=15,
average=False,
avg_alpha=None,
title="L+R",
peak_hold=False,
)
self.nb.GetPage(2).Add(self.wxgui_fftsink2_0_0_0.win)
self.wxgui_fftsink2_0_0 = fftsink2.fft_sink_f(
self.nb.GetPage(1).GetWin(),
baseband_freq=0,
y_per_div=10,
y_divs=10,
ref_level=0,
ref_scale=2.0,
sample_rate=baseband_rate,
fft_size=1024,
fft_rate=15,
average=True,
avg_alpha=0.8,
title="FM Demod",
peak_hold=False,
)
self.nb.GetPage(1).Add(self.wxgui_fftsink2_0_0.win)
self.wxgui_fftsink2_0 = fftsink2.fft_sink_c(
self.nb.GetPage(0).GetWin(),
baseband_freq=0,
y_per_div=10,
y_divs=10,
ref_level=-30,
ref_scale=2.0,
sample_rate=baseband_rate,
fft_size=1024,
fft_rate=15,
average=True,
avg_alpha=0.8,
title="Baseband",
peak_hold=False,
)
self.nb.GetPage(0).Add(self.wxgui_fftsink2_0.win)
self.uhd_usrp_source_0 = uhd.usrp_source(
",".join(("", "")),
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(freq_tune, 0)
self.uhd_usrp_source_0.set_gain(gain, 0)
self.uhd_usrp_source_0.set_antenna(antenna, 0)
self.rational_resampler_xxx_1 = filter.rational_resampler_fff(
interpolation=audio_rate,
decimation=audio_decim_rate,
taps=None,
fractional_bw=None,
)
self.rational_resampler_xxx_0 = filter.rational_resampler_fff(
interpolation=audio_rate,
decimation=audio_decim_rate,
taps=None,
fractional_bw=None,
)
self.gr_rds_panel_0 = rds.rdsPanel(gr_rds_panel_0_msgq_in, freq, self.GetWin())
self.Add(self.gr_rds_panel_0)
self.gr_rds_freq_divider_0 = rds.freq_divider(16)
self.gr_rds_data_decoder_0 = rds.data_decoder(gr_rds_data_decoder_0_msgq_out)
self.gr_rds_bpsk_demod_0 = rds.bpsk_demod(audio_decim_rate)
self.freq_xlating_fir_filter_xxx_0 = filter.freq_xlating_fir_filter_ccc(xlate_decim, (firdes.low_pass(1, samp_rate, xlate_bandwidth/2, 1000)), freq_offset, samp_rate)
self.fir_filter_xxx_7 = filter.fir_filter_fff(audio_decim, (firdes.low_pass(1,baseband_rate,1.2e3,1.5e3,firdes.WIN_HAMMING)))
self.fir_filter_xxx_7.declare_sample_delay(0)
self.fir_filter_xxx_6 = filter.fir_filter_fff(audio_decim, (firdes.low_pass(1,baseband_rate,1.5e3,2e3,firdes.WIN_HAMMING)))
self.fir_filter_xxx_6.declare_sample_delay(0)
self.fir_filter_xxx_5 = filter.fir_filter_fff(audio_decim, (firdes.low_pass(1.0,baseband_rate,15e3,1e3,firdes.WIN_HAMMING)))
self.fir_filter_xxx_5.declare_sample_delay(0)
self.fir_filter_xxx_4 = filter.fir_filter_fff(1, (firdes.band_pass(1.0,baseband_rate,57e3-3e3,57e3+3e3,3e3,firdes.WIN_HAMMING)))
self.fir_filter_xxx_4.declare_sample_delay(0)
self.fir_filter_xxx_3 = filter.fir_filter_fff(1, (firdes.band_pass(1.0,baseband_rate,38e3-15e3/2,38e3+15e3/2,1e3,firdes.WIN_HAMMING)))
self.fir_filter_xxx_3.declare_sample_delay(0)
self.fir_filter_xxx_2 = filter.fir_filter_fff(1, (firdes.band_pass(1.0,baseband_rate,19e3-500,19e3+500,1e3,firdes.WIN_HAMMING)))
self.fir_filter_xxx_2.declare_sample_delay(0)
self.fir_filter_xxx_1 = filter.fir_filter_fff(audio_decim, (firdes.low_pass(1.0,baseband_rate,15e3,1e3,firdes.WIN_HAMMING)))
self.fir_filter_xxx_1.declare_sample_delay(0)
self.fir_filter_xxx_0 = filter.fir_filter_ccc(1, (firdes.low_pass(1.0, baseband_rate, 80e3,35e3,firdes.WIN_HAMMING)))
self.fir_filter_xxx_0.declare_sample_delay(0)
self.digital_diff_decoder_bb_0 = digital.diff_decoder_bb(2)
self.blocks_sub_xx_0 = blocks.sub_ff(1)
self.blocks_multiply_xx_0_0 = blocks.multiply_vff(1)
self.blocks_multiply_xx_0 = blocks.multiply_vff(1)
self.blocks_multiply_const_vxx_1 = blocks.multiply_const_vff((10**(1.*volume/10), ))
self.blocks_multiply_const_vxx_0 = blocks.multiply_const_vff((10**(1.*volume/10), ))
self.blocks_add_xx_0 = blocks.add_vff(1)
self.audio_sink_0 = audio.sink(audio_rate, "", True)
self.analog_pll_freqdet_cf_0 = analog.pll_freqdet_cf(1.0*0 + (loop_bw*2*math.pi/baseband_rate), +(2.0 * math.pi * 90e3 / baseband_rate), -(2.0 * math.pi * 90e3 / baseband_rate))
self.analog_fm_deemph_1 = analog.fm_deemph(fs=baseband_rate, tau=75e-6)
self.analog_fm_deemph_0 = analog.fm_deemph(fs=baseband_rate, tau=75e-6)
##################################################
# Connections
##################################################
self.connect((self.uhd_usrp_source_0, 0), (self.freq_xlating_fir_filter_xxx_0, 0))
self.connect((self.freq_xlating_fir_filter_xxx_0, 0), (self.fir_filter_xxx_0, 0))
self.connect((self.fir_filter_xxx_2, 0), (self.blocks_multiply_xx_0, 0))
self.connect((self.fir_filter_xxx_2, 0), (self.blocks_multiply_xx_0, 1))
self.connect((self.fir_filter_xxx_2, 0), (self.blocks_multiply_xx_0_0, 0))
self.connect((self.fir_filter_xxx_2, 0), (self.blocks_multiply_xx_0_0, 1))
self.connect((self.fir_filter_xxx_3, 0), (self.blocks_multiply_xx_0, 2))
self.connect((self.fir_filter_xxx_4, 0), (self.blocks_multiply_xx_0_0, 3))
self.connect((self.fir_filter_xxx_2, 0), (self.blocks_multiply_xx_0_0, 2))
self.connect((self.fir_filter_xxx_1, 0), (self.blocks_sub_xx_0, 0))
self.connect((self.fir_filter_xxx_2, 0), (self.gr_rds_freq_divider_0, 0))
self.connect((self.fir_filter_xxx_1, 0), (self.blocks_add_xx_0, 0))
self.connect((self.blocks_multiply_xx_0, 0), (self.fir_filter_xxx_5, 0))
self.connect((self.gr_rds_freq_divider_0, 0), (self.fir_filter_xxx_7, 0))
self.connect((self.fir_filter_xxx_7, 0), (self.gr_rds_bpsk_demod_0, 1))
self.connect((self.digital_diff_decoder_bb_0, 0), (self.gr_rds_data_decoder_0, 0))
self.connect((self.gr_rds_bpsk_demod_0, 0), (self.digital_diff_decoder_bb_0, 0))
self.connect((self.fir_filter_xxx_6, 0), (self.gr_rds_bpsk_demod_0, 0))
self.connect((self.fir_filter_xxx_2, 0), (self.wxgui_scopesink2_0, 0))
self.connect((self.fir_filter_xxx_1, 0), (self.wxgui_fftsink2_0_0_0, 0))
self.connect((self.fir_filter_xxx_3, 0), (self.wxgui_fftsink2_0_0_0_1, 0))
self.connect((self.fir_filter_xxx_4, 0), (self.wxgui_fftsink2_0_0_0_1_0, 0))
self.connect((self.blocks_multiply_xx_0_0, 0), (self.fir_filter_xxx_6, 0))
self.connect((self.blocks_multiply_xx_0, 0), (self.wxgui_fftsink2_0_0_0_1_0_0, 0))
self.connect((self.fir_filter_xxx_5, 0), (self.blocks_add_xx_0, 1))
self.connect((self.fir_filter_xxx_5, 0), (self.blocks_sub_xx_0, 1))
self.connect((self.fir_filter_xxx_0, 0), (self.analog_pll_freqdet_cf_0, 0))
self.connect((self.analog_pll_freqdet_cf_0, 0), (self.wxgui_fftsink2_0_0, 0))
self.connect((self.analog_pll_freqdet_cf_0, 0), (self.fir_filter_xxx_1, 0))
self.connect((self.analog_pll_freqdet_cf_0, 0), (self.fir_filter_xxx_2, 0))
self.connect((self.analog_pll_freqdet_cf_0, 0), (self.fir_filter_xxx_4, 0))
self.connect((self.blocks_add_xx_0, 0), (self.analog_fm_deemph_0, 0))
self.connect((self.blocks_multiply_xx_0_0, 0), (self.wxgui_fftsink2_0_0_0_1_0_1, 0))
self.connect((self.analog_fm_deemph_0, 0), (self.blocks_multiply_const_vxx_0, 0))
self.connect((self.blocks_multiply_const_vxx_0, 0), (self.rational_resampler_xxx_0, 0))
self.connect((self.rational_resampler_xxx_0, 0), (self.audio_sink_0, 0))
self.connect((self.rational_resampler_xxx_1, 0), (self.audio_sink_0, 1))
self.connect((self.blocks_multiply_const_vxx_1, 0), (self.rational_resampler_xxx_1, 0))
self.connect((self.blocks_sub_xx_0, 0), (self.analog_fm_deemph_1, 0))
self.connect((self.analog_fm_deemph_1, 0), (self.blocks_multiply_const_vxx_1, 0))
self.connect((self.freq_xlating_fir_filter_xxx_0, 0), (self.wxgui_fftsink2_0, 0))
self.connect((self.analog_pll_freqdet_cf_0, 0), (self.fir_filter_xxx_3, 0))
def __init__(self,frame,panel,vbox,argv):
stdgui2.std_top_block.__init__ (self,frame,panel,vbox,argv)
parser=OptionParser(option_class=eng_option)
parser.add_option("-V", "--volume", type="eng_float", default=None,
help="set volume (default is midpoint)")
parser.add_option("-O", "--audio-output", type="string", default="plughw:0,0",
help="pcm device name (default is plughw:0,0)")
# print help when called with wrong arguments
(options, args) = parser.parse_args()
if len(args) != 0:
parser.print_help()
sys.exit(1)
self.file_source = gr.file_source(gr.sizeof_gr_complex*1, offline_samples, True)
chan_filter_coeffs = gr.firdes.low_pass(
1.0, # gain
usrp_rate, # sampling rate
80e3, # passband cutoff
35e3, # transition width
gr.firdes.WIN_HAMMING)
self.chan_filter = gr.fir_filter_ccf(1, chan_filter_coeffs)
print "# channel filter:", len(chan_filter_coeffs), "taps"
# PLL-based WFM demod
fm_alpha = 0.25 * 250e3 * math.pi / usrp_rate # 0.767
fm_beta = fm_alpha * fm_alpha / 4.0 # 0.147
fm_max_freq = 2.0 * math.pi * 90e3 / usrp_rate # 2.209
self.fm_demod = gr.pll_freqdet_cf(
fm_alpha, # phase gain
fm_beta, # freq gain
fm_max_freq, # in radians/sample
-fm_max_freq)
self.connect(self.file_source, self.chan_filter, self.fm_demod)
# L+R, pilot, L-R, RDS filters
lpr_filter_coeffs = gr.firdes.low_pass(
1.0, # gain
usrp_rate, # sampling rate
15e3, # passband cutoff
1e3, # transition width
gr.firdes.WIN_HAMMING)
self.lpr_filter = gr.fir_filter_fff(audio_decim, lpr_filter_coeffs)
pilot_filter_coeffs = gr.firdes.band_pass(
1.0, # gain
usrp_rate, # sampling rate
19e3-500, # low cutoff
19e3+500, # high cutoff
1e3, # transition width
gr.firdes.WIN_HAMMING)
self.pilot_filter = gr.fir_filter_fff(1, pilot_filter_coeffs)
dsbsc_filter_coeffs = gr.firdes.band_pass(
1.0, # gain
usrp_rate, # sampling rate
38e3-15e3/2, # low cutoff
38e3+15e3/2, # high cutoff
1e3, # transition width
gr.firdes.WIN_HAMMING)
self.dsbsc_filter = gr.fir_filter_fff(1, dsbsc_filter_coeffs)
rds_filter_coeffs = gr.firdes.band_pass(
1.0, # gain
usrp_rate, # sampling rate
57e3-3e3, # low cutoff
57e3+3e3, # high cutoff
3e3, # transition width
gr.firdes.WIN_HAMMING)
self.rds_filter = gr.fir_filter_fff(1, rds_filter_coeffs)
print "# lpr filter:", len(lpr_filter_coeffs), "taps"
print "# pilot filter:", len(pilot_filter_coeffs), "taps"
print "# dsbsc filter:", len(dsbsc_filter_coeffs), "taps"
print "# rds filter:", len(rds_filter_coeffs), "taps"
self.connect(self.fm_demod, self.lpr_filter)
self.connect(self.fm_demod, self.pilot_filter)
self.connect(self.fm_demod, self.dsbsc_filter)
self.connect(self.fm_demod, self.rds_filter)
# down-convert L-R, RDS
self.stereo_baseband = gr.multiply_ff()
self.connect(self.pilot_filter, (self.stereo_baseband, 0))
self.connect(self.pilot_filter, (self.stereo_baseband, 1))
self.connect(self.dsbsc_filter, (self.stereo_baseband, 2))
self.rds_baseband = gr.multiply_ff()
self.connect(self.pilot_filter, (self.rds_baseband, 0))
self.connect(self.pilot_filter, (self.rds_baseband, 1))
self.connect(self.pilot_filter, (self.rds_baseband, 2))
self.connect(self.rds_filter, (self.rds_baseband, 3))
# low-pass and downsample L-R
lmr_filter_coeffs = gr.firdes.low_pass(
1.0, # gain
usrp_rate, # sampling rate
15e3, # passband cutoff
1e3, # transition width
gr.firdes.WIN_HAMMING)
self.lmr_filter = gr.fir_filter_fff(audio_decim, lmr_filter_coeffs)
self.connect(self.stereo_baseband, self.lmr_filter)
# create L, R from L-R, L+R
self.left = gr.add_ff()
self.right = gr.sub_ff()
self.connect(self.lpr_filter, (self.left, 0))
self.connect(self.lmr_filter, (self.left, 1))
self.connect(self.lpr_filter, (self.right, 0))
self.connect(self.lmr_filter, (self.right, 1))
# send audio to null sink
self.null0 = gr.null_sink(gr.sizeof_float)
self.null1 = gr.null_sink(gr.sizeof_float)
self.connect(self.left, self.null0)
self.connect(self.right, self.null1)
# low-pass the baseband RDS signal at 1.5kHz
rds_bb_filter_coeffs = gr.firdes.low_pass(
1, # gain
usrp_rate, # sampling rate
1.5e3, # passband cutoff
2e3, # transition width
gr.firdes.WIN_HAMMING)
self.rds_bb_filter = gr.fir_filter_fff(audio_decim, rds_bb_filter_coeffs)
print "# rds bb filter:", len(rds_bb_filter_coeffs), "taps"
self.connect(self.rds_baseband, self.rds_bb_filter)
# 1187.5bps = 19kHz/16
self.clock_divider = rds.freq_divider(16)
rds_clock_taps = gr.firdes.low_pass(
1, # gain
usrp_rate, # sampling rate
1.2e3, # passband cutoff
1.5e3, # transition width
gr.firdes.WIN_HAMMING)
self.rds_clock = gr.fir_filter_fff(audio_decim, rds_clock_taps)
print "# rds clock filter:", len(rds_clock_taps), "taps"
self.connect(self.pilot_filter, self.clock_divider, self.rds_clock)
# bpsk_demod, diff_decoder, rds_decoder
self.bpsk_demod = rds.bpsk_demod(audio_rate)
self.differential_decoder = gr.diff_decoder_bb(2)
self.msgq = gr.msg_queue()
self.rds_decoder = rds.data_decoder(self.msgq)
self.connect(self.rds_bb_filter, (self.bpsk_demod, 0))
self.connect(self.rds_clock, (self.bpsk_demod, 1))
self.connect(self.bpsk_demod, self.differential_decoder)
self.connect(self.differential_decoder, self.rds_decoder)
self.frame = frame
self.panel = panel
self._build_gui(vbox, usrp_rate, audio_rate)
def __init__(self, frame, panel, vbox, argv):
stdgui2.std_top_block.__init__(self, frame, panel, vbox, argv)
parser = OptionParser(option_class=eng_option)
parser.add_option("-V",
"--volume",
type="eng_float",
default=None,
help="set volume (default is midpoint)")
parser.add_option("-O",
"--audio-output",
type="string",
default="plughw:0,0",
help="pcm device name (default is plughw:0,0)")
# print help when called with wrong arguments
(options, args) = parser.parse_args()
if len(args) != 0:
parser.print_help()
sys.exit(1)
self.file_source = gr.file_source(gr.sizeof_gr_complex * 1,
offline_samples, True)
chan_filter_coeffs = gr.firdes.low_pass(
1.0, # gain
usrp_rate, # sampling rate
80e3, # passband cutoff
35e3, # transition width
gr.firdes.WIN_HAMMING)
self.chan_filter = gr.fir_filter_ccf(1, chan_filter_coeffs)
print "# channel filter:", len(chan_filter_coeffs), "taps"
# PLL-based WFM demod
fm_alpha = 0.25 * 250e3 * math.pi / usrp_rate # 0.767
fm_beta = fm_alpha * fm_alpha / 4.0 # 0.147
fm_max_freq = 2.0 * math.pi * 90e3 / usrp_rate # 2.209
self.fm_demod = gr.pll_freqdet_cf(
fm_alpha, # phase gain
fm_beta, # freq gain
fm_max_freq, # in radians/sample
-fm_max_freq)
self.connect(self.file_source, self.chan_filter, self.fm_demod)
# L+R, pilot, L-R, RDS filters
lpr_filter_coeffs = gr.firdes.low_pass(
1.0, # gain
usrp_rate, # sampling rate
15e3, # passband cutoff
1e3, # transition width
gr.firdes.WIN_HAMMING)
self.lpr_filter = gr.fir_filter_fff(audio_decim, lpr_filter_coeffs)
pilot_filter_coeffs = gr.firdes.band_pass(
1.0, # gain
usrp_rate, # sampling rate
19e3 - 500, # low cutoff
19e3 + 500, # high cutoff
1e3, # transition width
gr.firdes.WIN_HAMMING)
self.pilot_filter = gr.fir_filter_fff(1, pilot_filter_coeffs)
dsbsc_filter_coeffs = gr.firdes.band_pass(
1.0, # gain
usrp_rate, # sampling rate
38e3 - 15e3 / 2, # low cutoff
38e3 + 15e3 / 2, # high cutoff
1e3, # transition width
gr.firdes.WIN_HAMMING)
self.dsbsc_filter = gr.fir_filter_fff(1, dsbsc_filter_coeffs)
rds_filter_coeffs = gr.firdes.band_pass(
1.0, # gain
usrp_rate, # sampling rate
57e3 - 3e3, # low cutoff
57e3 + 3e3, # high cutoff
3e3, # transition width
gr.firdes.WIN_HAMMING)
self.rds_filter = gr.fir_filter_fff(1, rds_filter_coeffs)
print "# lpr filter:", len(lpr_filter_coeffs), "taps"
print "# pilot filter:", len(pilot_filter_coeffs), "taps"
print "# dsbsc filter:", len(dsbsc_filter_coeffs), "taps"
print "# rds filter:", len(rds_filter_coeffs), "taps"
self.connect(self.fm_demod, self.lpr_filter)
self.connect(self.fm_demod, self.pilot_filter)
self.connect(self.fm_demod, self.dsbsc_filter)
self.connect(self.fm_demod, self.rds_filter)
# down-convert L-R, RDS
self.stereo_baseband = gr.multiply_ff()
self.connect(self.pilot_filter, (self.stereo_baseband, 0))
self.connect(self.pilot_filter, (self.stereo_baseband, 1))
self.connect(self.dsbsc_filter, (self.stereo_baseband, 2))
self.rds_baseband = gr.multiply_ff()
self.connect(self.pilot_filter, (self.rds_baseband, 0))
self.connect(self.pilot_filter, (self.rds_baseband, 1))
self.connect(self.pilot_filter, (self.rds_baseband, 2))
self.connect(self.rds_filter, (self.rds_baseband, 3))
# low-pass and downsample L-R
lmr_filter_coeffs = gr.firdes.low_pass(
1.0, # gain
usrp_rate, # sampling rate
15e3, # passband cutoff
1e3, # transition width
gr.firdes.WIN_HAMMING)
self.lmr_filter = gr.fir_filter_fff(audio_decim, lmr_filter_coeffs)
self.connect(self.stereo_baseband, self.lmr_filter)
# create L, R from L-R, L+R
self.left = gr.add_ff()
self.right = gr.sub_ff()
self.connect(self.lpr_filter, (self.left, 0))
self.connect(self.lmr_filter, (self.left, 1))
self.connect(self.lpr_filter, (self.right, 0))
self.connect(self.lmr_filter, (self.right, 1))
# send audio to null sink
self.null0 = gr.null_sink(gr.sizeof_float)
self.null1 = gr.null_sink(gr.sizeof_float)
self.connect(self.left, self.null0)
self.connect(self.right, self.null1)
# low-pass the baseband RDS signal at 1.5kHz
rds_bb_filter_coeffs = gr.firdes.low_pass(
1, # gain
usrp_rate, # sampling rate
1.5e3, # passband cutoff
2e3, # transition width
gr.firdes.WIN_HAMMING)
self.rds_bb_filter = gr.fir_filter_fff(audio_decim,
rds_bb_filter_coeffs)
print "# rds bb filter:", len(rds_bb_filter_coeffs), "taps"
self.connect(self.rds_baseband, self.rds_bb_filter)
# 1187.5bps = 19kHz/16
self.clock_divider = rds.freq_divider(16)
rds_clock_taps = gr.firdes.low_pass(
1, # gain
usrp_rate, # sampling rate
1.2e3, # passband cutoff
1.5e3, # transition width
gr.firdes.WIN_HAMMING)
self.rds_clock = gr.fir_filter_fff(audio_decim, rds_clock_taps)
print "# rds clock filter:", len(rds_clock_taps), "taps"
self.connect(self.pilot_filter, self.clock_divider, self.rds_clock)
# bpsk_demod, diff_decoder, rds_decoder
self.bpsk_demod = rds.bpsk_demod(audio_rate)
self.differential_decoder = gr.diff_decoder_bb(2)
self.msgq = gr.msg_queue()
self.rds_decoder = rds.data_decoder(self.msgq)
self.connect(self.rds_bb_filter, (self.bpsk_demod, 0))
self.connect(self.rds_clock, (self.bpsk_demod, 1))
self.connect(self.bpsk_demod, self.differential_decoder)
self.connect(self.differential_decoder, self.rds_decoder)
self.frame = frame
self.panel = panel
self._build_gui(vbox, usrp_rate, audio_rate)