def test_pwr_squelch_003(self):
# Test set/gets
alpha = 0.0001
thr1 = 10
thr2 = 20
ramp = 1
ramp2 = 2
gate = True
gate2 = False
op = analog.pwr_squelch_ff(thr1, alpha, ramp, gate)
op.set_threshold(thr2)
t = op.threshold()
self.assertEqual(thr2, t)
op.set_ramp(ramp2)
r = op.ramp()
self.assertEqual(ramp2, r)
op.set_gate(gate2)
g = op.gate()
self.assertEqual(gate2, g)
def __init__(self,
samp_rate=16E3,
name="unnamed",
save_dir=None,
postscript=None):
gr.hier_block2.__init__(self, "Recorder",
gr.io_signature(1, 1, gr.sizeof_float),
gr.io_signature(1, 1, gr.sizeof_float))
self.timeout = 18000
self.save_dir = save_dir
self.postscript = postscript
self.record_squelch = analog.pwr_squelch_ff(-200, 0.1, 0, True)
self.blocks_wavfile_sink = blocks.wavfile_sink("/dev/null", 1,
samp_rate, 16)
self.blocks_null_source = blocks.null_source(gr.sizeof_float * 1)
self.connect(self, (self.record_squelch, 0))
self.connect((self.record_squelch, 0), (self.blocks_wavfile_sink, 0))
self.connect((self.blocks_null_source, 0), self)
thread = threading.Thread(target=self.timer_thread,
args=(name, self.save_dir, self.blocks_wavfile_sink, \
self.record_squelch, self.postscript, self.timeout))
thread.daemon = True
thread.start()
def __init__(self, alpha=0.0001, threshold_db=-10, gate=False):
gr.hier_block2.__init__(
self,
"standard_squelch",
gr.io_signature(1, 1, gr.sizeof_float), # Input signature
gr.io_signature(1, 1, gr.sizeof_float)) # Output signature
#fixed coeffs, Chebyshev type 2 LPF=[0, 0.4, 0.7], HPF=[0.4, 0.7, 1]
self.low_iir = iir_filter_ffd([
0.12260106307699403, -0.22058023529806434, 0.22058023529806436,
-0.12260106307699434
], [
1.00000000000000000, 0.7589332900264623, 0.5162740252200005,
0.07097813844342238
], False)
self.low_square = blocks.multiply_ff()
self.low_smooth = single_pole_iir_filter_ff(alpha)
self.hi_iir = iir_filter_ffd([
0.1913118666668073, 0.4406071020350289, 0.4406071020350288,
0.19131186666680736
], [
1.000000000000000000, -0.11503633296078866, 0.3769676347066441,
0.0019066356578167866
], False)
self.hi_square = blocks.multiply_ff()
self.hi_smooth = single_pole_iir_filter_ff(alpha)
#inverted thresholds because we reversed the division block inputs
#to make the threshold output 1 when open and 0 when closed
self.gate = blocks.threshold_ff(0, 0, 0)
self.set_threshold(threshold_db)
self.squelch_lpf = single_pole_iir_filter_ff(alpha)
self.squelch_mult = blocks.multiply_ff()
self.div = blocks.divide_ff()
#This is horrible, but there's no better way to gate samples.
#the block is fast, so realistically there's little overhead
#TODO: implement a valve block that gates based on an input value
self.valve = analog.pwr_squelch_ff(-100, 1, 0, gate)
#sample path
self.connect(self, (self.squelch_mult, 0))
#filter path (LPF)
self.connect(self, self.low_iir)
self.connect(self.low_iir, (self.low_square, 0))
self.connect(self.low_iir, (self.low_square, 1))
self.connect(self.low_square, self.low_smooth, (self.div, 0))
#filter path (HPF)
self.connect(self, self.hi_iir)
self.connect(self.hi_iir, (self.hi_square, 0))
self.connect(self.hi_iir, (self.hi_square, 1))
self.connect(self.hi_square, self.hi_smooth, (self.div, 1))
#control path
self.connect(self.div, self.gate, self.squelch_lpf,
(self.squelch_mult, 1))
self.connect(self.squelch_mult, self)
def test_pwr_squelch_003(self):
# Test set/gets
alpha = 0.0001
thr1 = 10
thr2 = 20
ramp = 1
ramp2 = 2
gate = True
gate2 = False
op = analog.pwr_squelch_ff(thr1, alpha, ramp, gate)
op.set_threshold(thr2)
t = op.threshold()
self.assertEqual(thr2, t)
op.set_ramp(ramp2)
r = op.ramp()
self.assertEqual(ramp2, r)
op.set_gate(gate2)
g = op.gate()
self.assertEqual(gate2, g)
def __init__(self):
gr.top_block.__init__(self, "SAME Decoder test")
##################################################
# Variables
##################################################
self.samp_rate = samp_rate = 8000
##################################################
# Blocks
##################################################
self.rational_resampler_44k = filter.rational_resampler_fff(
interpolation=80,
decimation=441,
)
self.rational_resampler_xxx_0 = filter.rational_resampler_ccc(
interpolation=100,
decimation=96,
taps=None,
fractional_bw=None,
)
self.freq_xlating_fir_filter_xxx_0 = filter.freq_xlating_fir_filter_fcc(1, (firdes.low_pass(1, samp_rate, 600, 100)), 1822.916667, samp_rate)
self.digital_gmsk_demod_0 = digital.gmsk_demod(
samples_per_symbol=16,
gain_mu=0.175,
mu=0.5,
omega_relative_limit=0.1,
freq_error=0.0,
verbose=True,
log=False,
)
#self.src = audio.source(samp_rate, "plughw:CARD=PCH,DEV=2", True)
self.blocks_wavfile_source_0 = blocks.wavfile_source("eas-test-11-7-2013.wav", False)
self.blocks_bitstream_sink = blocks.file_sink(1, "bitstream.bin")
self.xlat_sink = blocks.wavfile_sink("xlat.wav", 1, 8333)
self.xlat_complex_to_float = blocks.complex_to_float()
self.analog_pwr_squelch_xx_0 = analog.pwr_squelch_ff(-50, 0.0001, 0)
self.msg_queue = gr.msg_queue(10)
self.same_dec_0 = same.same_dec(self.msg_queue)
##################################################
# Connections
##################################################
self.connect((self.freq_xlating_fir_filter_xxx_0, 0), (self.rational_resampler_xxx_0, 0))
self.connect((self.rational_resampler_xxx_0, 0), (self.xlat_complex_to_float, 0), (self.xlat_sink, 0))
self.connect((self.rational_resampler_xxx_0, 0), (self.digital_gmsk_demod_0, 0))
self.connect((self.digital_gmsk_demod_0, 0), (self.same_dec_0, 0))
self.connect((self.digital_gmsk_demod_0, 0), (self.blocks_bitstream_sink, 0))
#self.connect((self.src, 0), (self.rational_resampler_44k, 0))
#self.connect((self.rational_resampler_44k, 0), (self.analog_pwr_squelch_xx_0, 0))
self.connect((self.blocks_wavfile_source_0, 0), (self.analog_pwr_squelch_xx_0,0))
self.connect((self.analog_pwr_squelch_xx_0, 0), (self.freq_xlating_fir_filter_xxx_0, 0))
self._watcher = _queue_watcher_thread(self.msg_queue)
def __init__(self, alpha=0.0001, threshold_db=-10, gate=False):
gr.hier_block2.__init__(self, "standard_squelch",
gr.io_signature(1, 1, gr.sizeof_float), # Input signature
gr.io_signature(1, 1, gr.sizeof_float)) # Output signature
#fixed coeffs, Chebyshev type 2 LPF=[0, 0.4, 0.7], HPF=[0.4, 0.7, 1]
self.low_iir = iir_filter_ffd([0.12260106307699403, -0.22058023529806434, 0.22058023529806436, -0.12260106307699434],
[1.00000000000000000, 0.7589332900264623, 0.5162740252200005, 0.07097813844342238],
False)
self.low_square = blocks.multiply_ff()
self.low_smooth = single_pole_iir_filter_ff(alpha)
self.hi_iir = iir_filter_ffd([0.1913118666668073, 0.4406071020350289, 0.4406071020350288, 0.19131186666680736],
[1.000000000000000000, -0.11503633296078866, 0.3769676347066441, 0.0019066356578167866],
False)
self.hi_square = blocks.multiply_ff()
self.hi_smooth = single_pole_iir_filter_ff(alpha)
#inverted thresholds because we reversed the division block inputs
#to make the threshold output 1 when open and 0 when closed
self.gate = blocks.threshold_ff(0,0,0)
self.set_threshold(threshold_db)
self.squelch_lpf = single_pole_iir_filter_ff(alpha)
self.squelch_mult = blocks.multiply_ff()
self.div = blocks.divide_ff()
#This is horrible, but there's no better way to gate samples.
#the block is fast, so realistically there's little overhead
#TODO: implement a valve block that gates based on an input value
self.valve = analog.pwr_squelch_ff(-100, 1, 0, gate)
#sample path
self.connect(self, (self.squelch_mult, 0))
#filter path (LPF)
self.connect(self,self.low_iir)
self.connect(self.low_iir,(self.low_square,0))
self.connect(self.low_iir,(self.low_square,1))
self.connect(self.low_square,self.low_smooth,(self.div,0))
#filter path (HPF)
self.connect(self,self.hi_iir)
self.connect(self.hi_iir,(self.hi_square,0))
self.connect(self.hi_iir,(self.hi_square,1))
self.connect(self.hi_square,self.hi_smooth,(self.div,1))
#control path
self.connect(self.div, self.gate, self.squelch_lpf, (self.squelch_mult,1))
self.connect(self.squelch_mult, self)
def __init__(self, samp_rate=16E3, name="unnamed"):
gr.hier_block2.__init__(self, "Recorder",
gr.io_signature(1, 1, gr.sizeof_float), gr.io_signature(1, 1, gr.sizeof_float))
self.record_squelch = analog.pwr_squelch_ff(-200, 0.1, 0, True)
self.blocks_wavfile_sink = blocks.wavfile_sink("/dev/null", 1, samp_rate, 16)
self.blocks_null_source = blocks.null_source(gr.sizeof_float*1)
self.connect(self, (self.record_squelch, 0))
self.connect((self.record_squelch, 0), (self.blocks_wavfile_sink, 0))
self.connect((self.blocks_null_source, 0), self)
thread = threading.Thread(target=self.timer_thread,
args=(name, self.blocks_wavfile_sink, self.record_squelch))
thread.daemon = True
thread.start()
def __init__(self):
gr.top_block.__init__(self, "SAME Decoder test")
##################################################
# Variables
##################################################
self.samp_rate = samp_rate = 8000
##################################################
# Blocks
##################################################
self.rational_resampler_44k = filter.rational_resampler_fff(
interpolation=80,
decimation=441,
)
self.rational_resampler_xxx_0 = filter.rational_resampler_ccc(
interpolation=100,
decimation=96,
taps=None,
fractional_bw=None,
)
self.freq_xlating_fir_filter_xxx_0 = filter.freq_xlating_fir_filter_fcc(1, (firdes.low_pass(1, samp_rate, 600, 100)), 1822.916667, samp_rate)
self.digital_gmsk_demod_0 = digital.gmsk_demod(
samples_per_symbol=16,
gain_mu=0.175,
mu=0.5,
omega_relative_limit=0.1,
freq_error=0.0,
verbose=True,
log=False,
)
self.src = audio.source(samp_rate, "plughw:CARD=PCH,DEV=2", True)
#self.blocks_wavfile_source_0 = blocks.wavfile_source("Monthly_Test_WUAL_DEC-2013.wav", False)
self.analog_pwr_squelch_xx_0 = analog.pwr_squelch_ff(-50, 0.0001, 0)
self.msg_queue = gr.msg_queue(10)
self.same_dec_0 = same.same_dec(self.msg_queue)
##################################################
# Connections
##################################################
self.connect((self.freq_xlating_fir_filter_xxx_0, 0), (self.rational_resampler_xxx_0, 0))
self.connect((self.rational_resampler_xxx_0, 0), (self.digital_gmsk_demod_0, 0))
self.connect((self.digital_gmsk_demod_0, 0), (self.same_dec_0, 0))
self.connect((self.src, 0), (self.rational_resampler_44k, 0))
self.connect((self.rational_resampler_44k, 0), (self.analog_pwr_squelch_xx_0, 0))
self.connect((self.analog_pwr_squelch_xx_0, 0), (self.freq_xlating_fir_filter_xxx_0, 0))
self._watcher = _queue_watcher_thread(self.msg_queue)
def test_pwr_squelch_004(self):
alpha = 0.0001
thr = -25
src_data = map(lambda x: float(x)/10.0, range(1, 40))
src = blocks.vector_source_f(src_data)
op = analog.pwr_squelch_ff(thr, alpha)
dst = blocks.vector_sink_f()
self.tb.connect(src, op)
self.tb.connect(op, dst)
self.tb.run()
expected_result = src_data
expected_result[0:20] = 20*[0,]
result_data = dst.data()
self.assertFloatTuplesAlmostEqual(expected_result, result_data, 4)
def test_pwr_squelch_004(self):
alpha = 0.0001
thr = -25
src_data = [float(x) / 10.0 for x in range(1, 40)]
src = blocks.vector_source_f(src_data)
op = analog.pwr_squelch_ff(thr, alpha)
dst = blocks.vector_sink_f()
self.tb.connect(src, op)
self.tb.connect(op, dst)
self.tb.run()
expected_result = src_data
expected_result[0:20] = 20*[0,]
result_data = dst.data()
self.assertFloatTuplesAlmostEqual(expected_result, result_data, 4)
def __init__(self, samp_rate=4E6, audio_rate=8000, record=True):
gr.hier_block2.__init__(self, "TunerDemodNBFM",
gr.io_signature(1, 1, gr.sizeof_gr_complex),
gr.io_signature(1, 1, gr.sizeof_float))
# Default values
self.center_freq = 0
squelch_db = -60
self.quad_demod_gain = 0.050
self.file_name = "/dev/null"
self.record = record
# Decimation values for four stages of decimation
decims = (5, int(samp_rate/1E6))
# Low pass filter taps for decimation by 5
low_pass_filter_taps_0 = \
grfilter.firdes_low_pass(1, 1, 0.090, 0.010,
grfilter.firdes.WIN_HAMMING)
# Frequency translating FIR filter decimating by 5
self.freq_xlating_fir_filter_ccc = \
grfilter.freq_xlating_fir_filter_ccc(decims[0],
low_pass_filter_taps_0,
self.center_freq, samp_rate)
# FIR filter decimating by 5
fir_filter_ccc_0 = grfilter.fir_filter_ccc(decims[0],
low_pass_filter_taps_0)
# Low pass filter taps for decimation from samp_rate/25 to 40-79.9 ksps
# In other words, decimation by int(samp_rate/1E6)
# 12.5 kHz cutoff for NBFM channel bandwidth
low_pass_filter_taps_1 = grfilter.firdes_low_pass(
1, samp_rate/decims[0]**2, 12.5E3, 1E3, grfilter.firdes.WIN_HAMMING)
# FIR filter decimation by int(samp_rate/1E6)
fir_filter_ccc_1 = grfilter.fir_filter_ccc(decims[1],
low_pass_filter_taps_1)
# Non blocking power squelch
self.analog_pwr_squelch_cc = analog.pwr_squelch_cc(squelch_db,
1e-1, 0, False)
# Quadrature demod with gain set for decent audio
# The gain will be later multiplied by the 0 dB normalized volume
self.analog_quadrature_demod_cf = \
analog.quadrature_demod_cf(self.quad_demod_gain)
# 3.5 kHz cutoff for audio bandwidth
low_pass_filter_taps_2 = grfilter.firdes_low_pass(1,\
samp_rate/(decims[1] * decims[0]**2),\
3.5E3, 500, grfilter.firdes.WIN_HAMMING)
# FIR filter decimating by 5 from 40-79.9 ksps to 8-15.98 ksps
fir_filter_fff_0 = grfilter.fir_filter_fff(decims[0],
low_pass_filter_taps_2)
# Polyphase resampler allows arbitary RF sample rates
# Takes 8-15.98 ksps to a constant 8 ksps for audio
pfb_resamp = audio_rate/float(samp_rate/(decims[1] * decims[0]**3))
pfb_arb_resampler_fff = pfb.arb_resampler_fff(pfb_resamp, taps=None,
flt_size=32)
# Connect the blocks for the demod
self.connect(self, self.freq_xlating_fir_filter_ccc)
self.connect(self.freq_xlating_fir_filter_ccc, fir_filter_ccc_0)
self.connect(fir_filter_ccc_0, fir_filter_ccc_1)
self.connect(fir_filter_ccc_1, self.analog_pwr_squelch_cc)
self.connect(self.analog_pwr_squelch_cc,
self.analog_quadrature_demod_cf)
self.connect(self.analog_quadrature_demod_cf, fir_filter_fff_0)
self.connect(fir_filter_fff_0, pfb_arb_resampler_fff)
self.connect(pfb_arb_resampler_fff, self)
# Need to set this to a very low value of -200 since it is after demod
# Only want it to gate when the previuos squelch has gone to zero
analog_pwr_squelch_ff = analog.pwr_squelch_ff(-200, 1e-1, 0, True)
# File sink with single channel and 8 bits/sample
self.blocks_wavfile_sink = blocks.wavfile_sink(self.file_name, 1,
audio_rate, 8)
# Connect the blocks for recording
self.connect(pfb_arb_resampler_fff, analog_pwr_squelch_ff)
self.connect(analog_pwr_squelch_ff, self.blocks_wavfile_sink)
def __init__(self,infile, outfile, input_rate, channel_rate, codec_provoice, codec_p25, sslevel, svlevel):
gr.top_block.__init__(self, "Top Block")
self.input_rate = input_rate
self.channel_rate = channel_rate
self.source = blocks.file_source(gr.sizeof_gr_complex*1, infile, False)
self.lp1_decim = int(input_rate/(channel_rate*1.6))
print self.lp1_decim
self.lp1 = filter.fir_filter_ccc(self.lp1_decim,firdes.low_pass( 1.0, self.input_rate, (self.channel_rate/2), ((self.channel_rate/2)*0.6), firdes.WIN_HAMMING))
#self.audiodemod = gr.quadrature_demod_cf(1)
audio_pass = (input_rate/self.lp1_decim)*0.25
audio_stop = audio_pass+2000
self.audiodemod = analog.fm_demod_cf(channel_rate=(input_rate/self.lp1_decim), audio_decim=1, deviation=15000, audio_pass=audio_pass, audio_stop=audio_stop, gain=8, tau=75e-6)
self.throttle = blocks.throttle(gr.sizeof_gr_complex*1, self.input_rate)
self.signal_squelch = analog.pwr_squelch_cc(sslevel,0.01, 0, True)
self.vox_squelch = analog.pwr_squelch_ff(svlevel, 0.0005, 0, True)
self.audiosink = blocks.wavfile_sink(outfile, 1, 8000)
if codec_provoice:
self.dsd = dsd.block_ff(dsd.dsd_FRAME_PROVOICE,dsd.dsd_MOD_AUTO_SELECT,1,0,False)
channel_rate = input_rate/self.lp1_decim
self.resampler_in = filter.rational_resampler_fff(interpolation=48000, decimation=channel_rate, taps=None, fractional_bw=None, )
output_rate = 8000
resampler = filter.rational_resampler_fff(
interpolation=(input_rate/self.lp1_decim),
decimation=output_rate,
taps=None,
fractional_bw=None,
)
elif codec_p25:
symbol_deviation = 600.0
symbol_rate = 4800
channel_rate = input_rate/self.lp1_decim
fm_demod_gain = channel_rate / (2.0 * pi * symbol_deviation)
fm_demod = analog.quadrature_demod_cf(fm_demod_gain)
symbol_decim = 1
samples_per_symbol = channel_rate // symbol_rate
symbol_coeffs = (1.0/samples_per_symbol,) * samples_per_symbol
symbol_filter = filter.fir_filter_fff(symbol_decim, symbol_coeffs)
autotuneq = gr.msg_queue(2)
demod_fsk4 = op25.fsk4_demod_ff(autotuneq, channel_rate, symbol_rate)
# symbol slicer
levels = [ -2.0, 0.0, 2.0, 4.0 ]
slicer = op25.fsk4_slicer_fb(levels)
imbe = repeater.vocoder(False, True, 0, "", 0, False)
self.decodequeue = decodequeue = gr.msg_queue(10000)
decoder = repeater.p25_frame_assembler('', 0, 0, True, True, False, decodequeue)
float_conversion = blocks.short_to_float(1, 8192)
resampler = filter.rational_resampler_fff(
interpolation=8000,
decimation=8000,
taps=None,
fractional_bw=None,
)
#Tone squelch, custom GRC block that rips off CTCSS squelch to detect 4800 hz tone and latch squelch after that
if not codec_provoice and not codec_p25:
#self.tone_squelch = gr.tone_squelch_ff(audiorate, 4800.0, 0.05, 300, 0, True)
#tone squelch is EDACS ONLY
self.high_pass = filter.fir_filter_fff(1, firdes.high_pass(1, (input_rate/self.lp1_decim), 300, 30, firdes.WIN_HAMMING, 6.76))
#output_rate = channel_rate
resampler = filter.rational_resampler_fff(
interpolation=8000,
decimation=(input_rate/self.lp1_decim),
taps=None,
fractional_bw=None,
)
if(codec_provoice):
self.connect(self.source, self.throttle, self.lp1, self.audiodemod, self.resampler_in, self.dsd, self.audiosink)
elif(codec_p25):
self.connect(self.source, self.throttle, self.lp1, fm_demod, symbol_filter, demod_fsk4, slicer, decoder, imbe, float_conversion, resampler, self.audiosink)
else:
self.connect(self.source, self.throttle, self.lp1, self.signal_squelch, self.audiodemod, self.high_pass, self.vox_squelch, resampler, self.audiosink)
self.time_open = time.time()
self.time_tone = 0
self.time_activity = 0
def __init__(self):
grc_wxgui.top_block_gui.__init__(self, title="[FG]MRS Receiver")
_icon_path = "/usr/share/icons/hicolor/32x32/apps/gnuradio-grc.png"
self.SetIcon(wx.Icon(_icon_path, wx.BITMAP_TYPE_ANY))
##################################################
# Variables
##################################################
self.samp_rate = samp_rate = 1e6
self.channel_width = channel_width = 25e3
self.rf_freq_mhz = rf_freq_mhz = 462.5625
self.decimation = decimation = int(samp_rate/channel_width)
self.squelch = squelch = -20
self.spec_size = spec_size = 480,256
self.rf_freq = rf_freq = rf_freq_mhz*1.0e6
self.decimated_rate = decimated_rate = samp_rate/decimation
self.center_freq = center_freq = (int(rf_freq_mhz)+0.5)*1e6
self.cctss_freq = cctss_freq = 0
self.audio_rate = audio_rate = int(11025)
##################################################
# Blocks
##################################################
_squelch_sizer = wx.BoxSizer(wx.VERTICAL)
self._squelch_text_box = forms.text_box(
parent=self.GetWin(),
sizer=_squelch_sizer,
value=self.squelch,
callback=self.set_squelch,
label="Squelch (dBm)",
converter=forms.float_converter(),
proportion=0,
)
self._squelch_slider = forms.slider(
parent=self.GetWin(),
sizer=_squelch_sizer,
value=self.squelch,
callback=self.set_squelch,
minimum=-50,
maximum=0,
num_steps=50,
style=wx.SL_HORIZONTAL,
cast=float,
proportion=1,
)
self.GridAdd(_squelch_sizer, 3, 3, 1, 2)
self._cctss_freq_chooser = forms.drop_down(
parent=self.GetWin(),
value=self.cctss_freq,
callback=self.set_cctss_freq,
label="Privacy Code",
choices=[0,67.0,71.9,74.4,77.0,79.7,82.5,85.4,88.5,91.5,94.8,97.4,100.0,103.5,107.2,110.9,114.8,118.8,123.0,127.3,131.8,136.5,141.3,146.2,151.4,156.7,162.2,167.9,173.8,179.9,186.2,192.8,203.5,210.7,218.1,225.7,233.7,241.8,250.3],
labels=['0 (Monitor)',1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38],
)
self.GridAdd(self._cctss_freq_chooser, 3, 2, 1, 1)
self.wxgui_waterfallsink2_1_0 = waterfallsink2.waterfall_sink_f(
self.GetWin(),
baseband_freq=0,
dynamic_range=40,
ref_level=-25,
ref_scale=2.0,
sample_rate=audio_rate,
fft_size=512,
fft_rate=15,
average=False,
avg_alpha=None,
title="Raw Audio Spectrum",
size=(spec_size),
)
self.GridAdd(self.wxgui_waterfallsink2_1_0.win, 2, 4, 1, 3)
self.wxgui_waterfallsink2_1 = waterfallsink2.waterfall_sink_f(
self.GetWin(),
baseband_freq=0,
dynamic_range=40,
ref_level=-25,
ref_scale=2.0,
sample_rate=audio_rate,
fft_size=512,
fft_rate=15,
average=False,
avg_alpha=None,
title="Squelched Audio Spectrum",
size=(spec_size),
)
self.GridAdd(self.wxgui_waterfallsink2_1.win, 2, 1, 1, 3)
self.wxgui_waterfallsink2_0_0 = waterfallsink2.waterfall_sink_c(
self.GetWin(),
baseband_freq=center_freq,
dynamic_range=40,
ref_level=-25,
ref_scale=2.0,
sample_rate=samp_rate,
fft_size=512,
fft_rate=15,
average=False,
avg_alpha=None,
title="RF Spectrum",
size=(spec_size),
)
self.GridAdd(self.wxgui_waterfallsink2_0_0.win, 1, 1, 1, 3)
self.wxgui_waterfallsink2_0 = waterfallsink2.waterfall_sink_c(
self.GetWin(),
baseband_freq=0,
dynamic_range=40,
ref_level=-25,
ref_scale=2.0,
sample_rate=samp_rate,
fft_size=512,
fft_rate=15,
average=False,
avg_alpha=None,
title="Baseband Spectrum",
size=(spec_size),
)
self.GridAdd(self.wxgui_waterfallsink2_0.win, 1, 4, 1, 3)
self._rf_freq_mhz_chooser = forms.drop_down(
parent=self.GetWin(),
value=self.rf_freq_mhz,
callback=self.set_rf_freq_mhz,
label="Channel",
choices=[462.5625, 462.5875, 462.6125, 462.6375, 462.6625, 462.6875, 462.7125, 467.5625, 467.5875, 467.6125, 467.6375, 467.6625, 467.6875, 467.7125, 462.550, 462.575, 462.600, 462.625,462.650,462.675,462.700, 462.725],
labels=['FRS1 / GMRS 9',2,3,4,5,6,'FRS7 / GMRS15 ','FRS8',9,10,11,12,13,'FRS14','GMRS1',2,3,4,5,6,7,'GMRS8'],
)
self.GridAdd(self._rf_freq_mhz_chooser, 3, 1, 1, 1)
self.rational_resampler_xxx_0 = filter.rational_resampler_ccc(
interpolation=int(audio_rate),
decimation=int(decimated_rate),
taps=None,
fractional_bw=None,
)
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(0, 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(True, 0)
self.osmosdr_source_0.set_gain(10, 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_0 = filter.fir_filter_ccf(decimation, firdes.low_pass(
1, samp_rate, decimated_rate*0.8, decimated_rate*0.2, firdes.WIN_HAMMING, 6.76))
self.dc_blocker_xx_0 = filter.dc_blocker_cc(32, True)
self.blocks_multiply_xx_0 = blocks.multiply_vcc(1)
self.audio_sink_0 = audio.sink(audio_rate, "", True)
self.analog_sig_source_x_0 = analog.sig_source_c(samp_rate, analog.GR_COS_WAVE, rf_freq, 1, 0)
self.analog_pwr_squelch_xx_0 = analog.pwr_squelch_ff(squelch, 0.0001, 1, False)
self.analog_nbfm_rx_0 = analog.nbfm_rx(
audio_rate=audio_rate,
quad_rate=audio_rate,
tau=75e-6,
max_dev=5e3,
)
self.analog_ctcss_squelch_ff_0 = analog.ctcss_squelch_ff(audio_rate, cctss_freq, 0.01, 0, 1, False)
##################################################
# Connections
##################################################
self.connect((self.analog_sig_source_x_0, 0), (self.blocks_multiply_xx_0, 0))
self.connect((self.blocks_multiply_xx_0, 0), (self.low_pass_filter_0, 0))
self.connect((self.low_pass_filter_0, 0), (self.rational_resampler_xxx_0, 0))
self.connect((self.rational_resampler_xxx_0, 0), (self.analog_nbfm_rx_0, 0))
self.connect((self.analog_nbfm_rx_0, 0), (self.wxgui_waterfallsink2_1_0, 0))
self.connect((self.analog_nbfm_rx_0, 0), (self.analog_ctcss_squelch_ff_0, 0))
self.connect((self.analog_ctcss_squelch_ff_0, 0), (self.analog_pwr_squelch_xx_0, 0))
self.connect((self.analog_pwr_squelch_xx_0, 0), (self.audio_sink_0, 0))
self.connect((self.analog_pwr_squelch_xx_0, 0), (self.wxgui_waterfallsink2_1, 0))
self.connect((self.blocks_multiply_xx_0, 0), (self.wxgui_waterfallsink2_0, 0))
self.connect((self.osmosdr_source_0, 0), (self.dc_blocker_xx_0, 0))
self.connect((self.dc_blocker_xx_0, 0), (self.wxgui_waterfallsink2_0_0, 0))
self.connect((self.dc_blocker_xx_0, 0), (self.blocks_multiply_xx_0, 1))
def __init__(self, samp_rate=4E6, audio_rate=8000, record=True):
gr.hier_block2.__init__(self, "TunerDemodAM",
gr.io_signature(1, 1, gr.sizeof_gr_complex),
gr.io_signature(1, 1, gr.sizeof_float))
# Default values
self.center_freq = 0
squelch_db = -60
self.agc_ref = 0.1
self.file_name = "/dev/null"
self.record = record
# Decimation values for four stages of decimation
decims = (5, int(samp_rate/1E6))
# Low pass filter taps for decimation by 5
low_pass_filter_taps_0 = \
grfilter.firdes_low_pass(1, 1, 0.090, 0.010,
grfilter.firdes.WIN_HAMMING)
# Frequency translating FIR filter decimating by 5
self.freq_xlating_fir_filter_ccc = \
grfilter.freq_xlating_fir_filter_ccc(decims[0],
low_pass_filter_taps_0,
self.center_freq, samp_rate)
# FIR filter decimating by 5
fir_filter_ccc_0 = grfilter.fir_filter_ccc(decims[0],
low_pass_filter_taps_0)
# Low pass filter taps for decimation from samp_rate/25 to 40-79.9 ksps
# In other words, decimation by int(samp_rate/1E6)
# 12.5 kHz cutoff for NBFM channel bandwidth
low_pass_filter_taps_1 = grfilter.firdes_low_pass(
1, samp_rate/decims[0]**2, 12.5E3, 1E3, grfilter.firdes.WIN_HAMMING)
# FIR filter decimation by int(samp_rate/1E6)
fir_filter_ccc_1 = grfilter.fir_filter_ccc(decims[1],
low_pass_filter_taps_1)
# Non blocking power squelch
# Squelch level needs to be lower than NBFM or else choppy AM demod
self.analog_pwr_squelch_cc = analog.pwr_squelch_cc(squelch_db,
1e-1, 0, False)
# AGC with reference set for nomninal 0 dB volume
# Paramaters tweaked to prevent impulse during squelching
self.agc3_cc = analog.agc3_cc(1.0, 1E-4, self.agc_ref, 10, 1)
self.agc3_cc.set_max_gain(65536)
# AM demod with complex_to_mag()
# Can't use analog.am_demod_cf() since it won't work with N>2 demods
am_demod_cf = blocks.complex_to_mag(1)
# 3.5 kHz cutoff for audio bandwidth
low_pass_filter_taps_2 = grfilter.firdes_low_pass(1,\
samp_rate/(decims[1] * decims[0]**2),\
3.5E3, 500, grfilter.firdes.WIN_HAMMING)
# FIR filter decimating by 5 from 40-79.9 ksps to 8-15.98 ksps
fir_filter_fff_0 = grfilter.fir_filter_fff(decims[0],
low_pass_filter_taps_2)
# Polyphase resampler allows arbitary RF sample rates
# Takes 8-15.98 ksps to a constant 8 ksps for audio
pfb_resamp = audio_rate/float(samp_rate/(decims[1] * decims[0]**3))
pfb_arb_resampler_fff = pfb.arb_resampler_fff(pfb_resamp, taps=None,
flt_size=32)
# Connect the blocks for the demod
self.connect(self, self.freq_xlating_fir_filter_ccc)
self.connect(self.freq_xlating_fir_filter_ccc, fir_filter_ccc_0)
self.connect(fir_filter_ccc_0, fir_filter_ccc_1)
self.connect(fir_filter_ccc_1, self.analog_pwr_squelch_cc)
self.connect(self.analog_pwr_squelch_cc, self.agc3_cc)
self.connect(self.agc3_cc, am_demod_cf)
self.connect(am_demod_cf, fir_filter_fff_0)
self.connect(fir_filter_fff_0, pfb_arb_resampler_fff)
self.connect(pfb_arb_resampler_fff, self)
# Need to set this to a very low value of -200 since it is after demod
# Only want it to gate when the previuos squelch has gone to zero
analog_pwr_squelch_ff = analog.pwr_squelch_ff(-200, 1e-1, 0, True)
# File sink with single channel and 8 bits/sample
self.blocks_wavfile_sink = blocks.wavfile_sink(self.file_name, 1,
audio_rate, 8)
# Connect the blocks for recording
self.connect(pfb_arb_resampler_fff, analog_pwr_squelch_ff)
self.connect(analog_pwr_squelch_ff, self.blocks_wavfile_sink)
def __init__(self):
gr.top_block.__init__(self, "Ham2Mon NBFM Receiver Flow Example")
Qt.QWidget.__init__(self)
self.setWindowTitle("Ham2Mon NBFM Receiver Flow Example")
try:
self.setWindowIcon(Qt.QIcon.fromTheme('gnuradio-grc'))
except:
pass
self.top_scroll_layout = Qt.QVBoxLayout()
self.setLayout(self.top_scroll_layout)
self.top_scroll = Qt.QScrollArea()
self.top_scroll.setFrameStyle(Qt.QFrame.NoFrame)
self.top_scroll_layout.addWidget(self.top_scroll)
self.top_scroll.setWidgetResizable(True)
self.top_widget = Qt.QWidget()
self.top_scroll.setWidget(self.top_widget)
self.top_layout = Qt.QVBoxLayout(self.top_widget)
self.top_grid_layout = Qt.QGridLayout()
self.top_layout.addLayout(self.top_grid_layout)
self.settings = Qt.QSettings("GNU Radio", "nbfm_flow_example")
self.restoreGeometry(self.settings.value("geometry").toByteArray())
##################################################
# Variables
##################################################
self.samp_rate = samp_rate = 1E6
self.initial_decim = initial_decim = 5
self.samp_ratio = samp_ratio = samp_rate/1E6
self.final_rate = final_rate = samp_rate/initial_decim**2/int(samp_rate/1E6)
self.variable_low_pass_filter_taps_2 = variable_low_pass_filter_taps_2 = firdes.low_pass(1.0, final_rate, 3500, 500, firdes.WIN_HAMMING, 6.76)
self.variable_low_pass_filter_taps_1 = variable_low_pass_filter_taps_1 = firdes.low_pass(1.0, samp_rate/25, 12.5E3, 1E3, firdes.WIN_HAMMING, 6.76)
self.variable_low_pass_filter_taps_0 = variable_low_pass_filter_taps_0 = firdes.low_pass(1.0, 1, 0.090, 0.010, firdes.WIN_HAMMING, 6.76)
self.squelch_dB = squelch_dB = -70
self.gain_db = gain_db = 30
self.final_decim = final_decim = int(samp_rate/1E6)
self.file_name = file_name = "test.wav"
self.fft_length = fft_length = 256 * int(pow(2, np.ceil(np.log(samp_ratio)/np.log(2))))
self.demod_bb_freq = demod_bb_freq = 390E3
self.center_freq = center_freq = 144E6
##################################################
# Blocks
##################################################
self._squelch_dB_range = Range(-100, 0, 5, -70, 200)
self._squelch_dB_win = RangeWidget(self._squelch_dB_range, self.set_squelch_dB, "Squelch (dB)", "counter_slider", float)
self.top_grid_layout.addWidget(self._squelch_dB_win, 5,1,1,3)
self._gain_db_range = Range(0, 70, 1, 30, 200)
self._gain_db_win = RangeWidget(self._gain_db_range, self.set_gain_db, "HW Gain (dB)", "counter_slider", float)
self.top_grid_layout.addWidget(self._gain_db_win, 4,1,1,3)
self._demod_bb_freq_range = Range(-samp_rate/2, samp_rate/2, 5E3, 390E3, 200)
self._demod_bb_freq_win = RangeWidget(self._demod_bb_freq_range, self.set_demod_bb_freq, "Demod BB Freq (Hz)", "counter_slider", float)
self.top_grid_layout.addWidget(self._demod_bb_freq_win, 3,1,1,3)
self.qtgui_time_sink_x_0 = qtgui.time_sink_f(
fft_length, #size
samp_rate, #samp_rate
"Averaged Spectrum", #name
1 #number of inputs
)
self.qtgui_time_sink_x_0.set_update_time(0.10)
self.qtgui_time_sink_x_0.set_y_axis(-60, 40)
self.qtgui_time_sink_x_0.set_y_label("Power", "")
self.qtgui_time_sink_x_0.enable_tags(-1, True)
self.qtgui_time_sink_x_0.set_trigger_mode(qtgui.TRIG_MODE_FREE, qtgui.TRIG_SLOPE_POS, 0.0, 0, 0, "")
self.qtgui_time_sink_x_0.enable_autoscale(False)
self.qtgui_time_sink_x_0.enable_grid(False)
self.qtgui_time_sink_x_0.enable_control_panel(False)
if not True:
self.qtgui_time_sink_x_0.disable_legend()
labels = ["", "", "", "", "",
"", "", "", "", ""]
widths = [1, 1, 1, 1, 1,
1, 1, 1, 1, 1]
colors = ["blue", "red", "green", "black", "cyan",
"magenta", "yellow", "dark red", "dark green", "blue"]
styles = [1, 1, 1, 1, 1,
1, 1, 1, 1, 1]
markers = [-1, -1, -1, -1, -1,
-1, -1, -1, -1, -1]
alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0]
for i in xrange(1):
if len(labels[i]) == 0:
self.qtgui_time_sink_x_0.set_line_label(i, "Data {0}".format(i))
else:
self.qtgui_time_sink_x_0.set_line_label(i, labels[i])
self.qtgui_time_sink_x_0.set_line_width(i, widths[i])
self.qtgui_time_sink_x_0.set_line_color(i, colors[i])
self.qtgui_time_sink_x_0.set_line_style(i, styles[i])
self.qtgui_time_sink_x_0.set_line_marker(i, markers[i])
self.qtgui_time_sink_x_0.set_line_alpha(i, alphas[i])
self._qtgui_time_sink_x_0_win = sip.wrapinstance(self.qtgui_time_sink_x_0.pyqwidget(), Qt.QWidget)
self.top_grid_layout.addWidget(self._qtgui_time_sink_x_0_win, 0,1,3,1)
self.qtgui_freq_sink_x_0_0 = qtgui.freq_sink_c(
1024, #size
firdes.WIN_BLACKMAN_hARRIS, #wintype
0, #fc
final_rate, #bw
"Decimated Channel", #name
1 #number of inputs
)
self.qtgui_freq_sink_x_0_0.set_update_time(0.10)
self.qtgui_freq_sink_x_0_0.set_y_axis(-200, -60)
self.qtgui_freq_sink_x_0_0.set_trigger_mode(qtgui.TRIG_MODE_FREE, 0.0, 0, "")
self.qtgui_freq_sink_x_0_0.enable_autoscale(False)
self.qtgui_freq_sink_x_0_0.enable_grid(False)
self.qtgui_freq_sink_x_0_0.set_fft_average(1.0)
self.qtgui_freq_sink_x_0_0.enable_control_panel(False)
if not True:
self.qtgui_freq_sink_x_0_0.disable_legend()
if complex == type(float()):
self.qtgui_freq_sink_x_0_0.set_plot_pos_half(not True)
labels = ["", "", "", "", "",
"", "", "", "", ""]
widths = [1, 1, 1, 1, 1,
1, 1, 1, 1, 1]
colors = ["blue", "red", "green", "black", "cyan",
"magenta", "yellow", "dark red", "dark green", "dark blue"]
alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0]
for i in xrange(1):
if len(labels[i]) == 0:
self.qtgui_freq_sink_x_0_0.set_line_label(i, "Data {0}".format(i))
else:
self.qtgui_freq_sink_x_0_0.set_line_label(i, labels[i])
self.qtgui_freq_sink_x_0_0.set_line_width(i, widths[i])
self.qtgui_freq_sink_x_0_0.set_line_color(i, colors[i])
self.qtgui_freq_sink_x_0_0.set_line_alpha(i, alphas[i])
self._qtgui_freq_sink_x_0_0_win = sip.wrapinstance(self.qtgui_freq_sink_x_0_0.pyqwidget(), Qt.QWidget)
self.top_grid_layout.addWidget(self._qtgui_freq_sink_x_0_0_win, 3,0,3,1)
self.qtgui_freq_sink_x_0 = qtgui.freq_sink_c(
fft_length, #size
firdes.WIN_BLACKMAN_hARRIS, #wintype
144E6, #fc
samp_rate, #bw
"Spectrum", #name
1 #number of inputs
)
self.qtgui_freq_sink_x_0.set_update_time(0.10)
self.qtgui_freq_sink_x_0.set_y_axis(-120, -20)
self.qtgui_freq_sink_x_0.set_trigger_mode(qtgui.TRIG_MODE_FREE, 0.0, 0, "")
self.qtgui_freq_sink_x_0.enable_autoscale(False)
self.qtgui_freq_sink_x_0.enable_grid(False)
self.qtgui_freq_sink_x_0.set_fft_average(1.0)
self.qtgui_freq_sink_x_0.enable_control_panel(False)
if not True:
self.qtgui_freq_sink_x_0.disable_legend()
if complex == type(float()):
self.qtgui_freq_sink_x_0.set_plot_pos_half(not True)
labels = ["", "", "", "", "",
"", "", "", "", ""]
widths = [1, 1, 1, 1, 1,
1, 1, 1, 1, 1]
colors = ["blue", "red", "green", "black", "cyan",
"magenta", "yellow", "dark red", "dark green", "dark blue"]
alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0]
for i in xrange(1):
if len(labels[i]) == 0:
self.qtgui_freq_sink_x_0.set_line_label(i, "Data {0}".format(i))
else:
self.qtgui_freq_sink_x_0.set_line_label(i, labels[i])
self.qtgui_freq_sink_x_0.set_line_width(i, widths[i])
self.qtgui_freq_sink_x_0.set_line_color(i, colors[i])
self.qtgui_freq_sink_x_0.set_line_alpha(i, alphas[i])
self._qtgui_freq_sink_x_0_win = sip.wrapinstance(self.qtgui_freq_sink_x_0.pyqwidget(), Qt.QWidget)
self.top_grid_layout.addWidget(self._qtgui_freq_sink_x_0_win, 0,0,3,1)
self.pfb_arb_resampler_xxx_0 = pfb.arb_resampler_fff(
16E3/float(final_rate/5),
taps=None,
flt_size=32)
self.pfb_arb_resampler_xxx_0.declare_sample_delay(0)
self.osmosdr_source_0 = osmosdr.source( args="numchan=" + str(1) + " " + "uhd" )
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(0, 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(False, 0)
self.osmosdr_source_0.set_gain(gain_db, 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(samp_rate*0.8, 0)
self.freq_xlating_fir_filter_xxx_0 = filter.freq_xlating_fir_filter_ccc(initial_decim, (variable_low_pass_filter_taps_0), demod_bb_freq, samp_rate)
self.fir_filter_xxx_0_1 = filter.fir_filter_fff(initial_decim, (variable_low_pass_filter_taps_0))
self.fir_filter_xxx_0_1.declare_sample_delay(0)
self.fir_filter_xxx_0_0 = filter.fir_filter_ccc(int(samp_rate/1E6), (variable_low_pass_filter_taps_0))
self.fir_filter_xxx_0_0.declare_sample_delay(0)
self.fir_filter_xxx_0 = filter.fir_filter_ccc(initial_decim, (variable_low_pass_filter_taps_0))
self.fir_filter_xxx_0.declare_sample_delay(0)
self.fft_vxx_0 = fft.fft_vcc(fft_length, True, (window.blackmanharris(fft_length)), True, 1)
self.blocks_wavfile_sink_0 = blocks.wavfile_sink(file_name, 1, 16000, 8)
self.blocks_vector_to_stream_0 = blocks.vector_to_stream(gr.sizeof_float*1, fft_length)
self.blocks_stream_to_vector_0 = blocks.stream_to_vector(gr.sizeof_gr_complex*1, fft_length)
self.blocks_probe_signal_vx_0 = blocks.probe_signal_vf(fft_length)
self.blocks_nlog10_ff_0 = blocks.nlog10_ff(10, fft_length, 0)
self.blocks_keep_one_in_n_0 = blocks.keep_one_in_n(gr.sizeof_gr_complex*fft_length, int(round(samp_rate/fft_length/1000)))
self.blocks_integrate_xx_0 = blocks.integrate_ff(100, fft_length)
self.blocks_complex_to_mag_squared_0 = blocks.complex_to_mag_squared(fft_length)
self.audio_sink_0 = audio.sink(16000, "", True)
self.analog_quadrature_demod_cf_0 = analog.quadrature_demod_cf(0.050)
self.analog_pwr_squelch_xx_0_0 = analog.pwr_squelch_ff(-200, 0.1, 0, True)
self.analog_pwr_squelch_xx_0 = analog.pwr_squelch_cc(squelch_dB, 0.1, 0, False)
##################################################
# Connections
##################################################
self.connect((self.analog_pwr_squelch_xx_0, 0), (self.analog_quadrature_demod_cf_0, 0))
self.connect((self.analog_pwr_squelch_xx_0_0, 0), (self.blocks_wavfile_sink_0, 0))
self.connect((self.analog_quadrature_demod_cf_0, 0), (self.fir_filter_xxx_0_1, 0))
self.connect((self.blocks_complex_to_mag_squared_0, 0), (self.blocks_integrate_xx_0, 0))
self.connect((self.blocks_integrate_xx_0, 0), (self.blocks_nlog10_ff_0, 0))
self.connect((self.blocks_keep_one_in_n_0, 0), (self.fft_vxx_0, 0))
self.connect((self.blocks_nlog10_ff_0, 0), (self.blocks_probe_signal_vx_0, 0))
self.connect((self.blocks_nlog10_ff_0, 0), (self.blocks_vector_to_stream_0, 0))
self.connect((self.blocks_stream_to_vector_0, 0), (self.blocks_keep_one_in_n_0, 0))
self.connect((self.blocks_vector_to_stream_0, 0), (self.qtgui_time_sink_x_0, 0))
self.connect((self.fft_vxx_0, 0), (self.blocks_complex_to_mag_squared_0, 0))
self.connect((self.fir_filter_xxx_0, 0), (self.fir_filter_xxx_0_0, 0))
self.connect((self.fir_filter_xxx_0_0, 0), (self.analog_pwr_squelch_xx_0, 0))
self.connect((self.fir_filter_xxx_0_0, 0), (self.qtgui_freq_sink_x_0_0, 0))
self.connect((self.fir_filter_xxx_0_1, 0), (self.pfb_arb_resampler_xxx_0, 0))
self.connect((self.freq_xlating_fir_filter_xxx_0, 0), (self.fir_filter_xxx_0, 0))
self.connect((self.osmosdr_source_0, 0), (self.blocks_stream_to_vector_0, 0))
self.connect((self.osmosdr_source_0, 0), (self.freq_xlating_fir_filter_xxx_0, 0))
self.connect((self.osmosdr_source_0, 0), (self.qtgui_freq_sink_x_0, 0))
self.connect((self.pfb_arb_resampler_xxx_0, 0), (self.analog_pwr_squelch_xx_0_0, 0))
self.connect((self.pfb_arb_resampler_xxx_0, 0), (self.audio_sink_0, 0))
def __init__(self):
gr.top_block.__init__(self, "Ham2Mon Receiver Flow Example")
Qt.QWidget.__init__(self)
self.setWindowTitle("Ham2Mon Receiver Flow Example")
try:
self.setWindowIcon(Qt.QIcon.fromTheme('gnuradio-grc'))
except:
pass
self.top_scroll_layout = Qt.QVBoxLayout()
self.setLayout(self.top_scroll_layout)
self.top_scroll = Qt.QScrollArea()
self.top_scroll.setFrameStyle(Qt.QFrame.NoFrame)
self.top_scroll_layout.addWidget(self.top_scroll)
self.top_scroll.setWidgetResizable(True)
self.top_widget = Qt.QWidget()
self.top_scroll.setWidget(self.top_widget)
self.top_layout = Qt.QVBoxLayout(self.top_widget)
self.top_grid_layout = Qt.QGridLayout()
self.top_layout.addLayout(self.top_grid_layout)
self.settings = Qt.QSettings("GNU Radio", "flow_example")
self.restoreGeometry(self.settings.value("geometry").toByteArray())
##################################################
# Variables
##################################################
self.samp_rate = samp_rate = 1E6
self.initial_decim = initial_decim = 5
self.samp_ratio = samp_ratio = samp_rate / 1E6
self.final_rate = final_rate = samp_rate / initial_decim**2 / int(
samp_rate / 1E6)
self.variable_low_pass_filter_taps_2 = variable_low_pass_filter_taps_2 = firdes.low_pass(
1.0, final_rate, 3500, 500, firdes.WIN_HAMMING, 6.76)
self.variable_low_pass_filter_taps_1 = variable_low_pass_filter_taps_1 = firdes.low_pass(
1.0, samp_rate / 25, 12.5E3, 1E3, firdes.WIN_HAMMING, 6.76)
self.variable_low_pass_filter_taps_0 = variable_low_pass_filter_taps_0 = firdes.low_pass(
1.0, 1, 0.090, 0.010, firdes.WIN_HAMMING, 6.76)
self.squelch_dB = squelch_dB = -70
self.gain_db = gain_db = 30
self.final_decim = final_decim = int(samp_rate / 1E6)
self.file_name = file_name = "test.wav"
self.fft_length = fft_length = 256 * int(
pow(2, np.ceil(np.log(samp_ratio) / np.log(2))))
self.demod_bb_freq = demod_bb_freq = 390E3
self.center_freq = center_freq = 144E6
##################################################
# Blocks
##################################################
self._squelch_dB_range = Range(-100, 0, 5, -70, 200)
self._squelch_dB_win = RangeWidget(self._squelch_dB_range,
self.set_squelch_dB, "Squelch (dB)",
"counter_slider", float)
self.top_grid_layout.addWidget(self._squelch_dB_win, 5, 1, 1, 3)
self._gain_db_range = Range(0, 70, 1, 30, 200)
self._gain_db_win = RangeWidget(self._gain_db_range, self.set_gain_db,
"HW Gain (dB)", "counter_slider",
float)
self.top_grid_layout.addWidget(self._gain_db_win, 4, 1, 1, 3)
self._demod_bb_freq_range = Range(-samp_rate / 2, samp_rate / 2, 5E3,
390E3, 200)
self._demod_bb_freq_win = RangeWidget(self._demod_bb_freq_range,
self.set_demod_bb_freq,
"Demod BB Freq (Hz)",
"counter_slider", float)
self.top_grid_layout.addWidget(self._demod_bb_freq_win, 3, 1, 1, 3)
self.qtgui_time_sink_x_0 = qtgui.time_sink_f(
fft_length, #size
samp_rate, #samp_rate
"Averaged Spectrum", #name
1 #number of inputs
)
self.qtgui_time_sink_x_0.set_update_time(0.10)
self.qtgui_time_sink_x_0.set_y_axis(-60, 40)
self.qtgui_time_sink_x_0.set_y_label("Power", "")
self.qtgui_time_sink_x_0.enable_tags(-1, True)
self.qtgui_time_sink_x_0.set_trigger_mode(qtgui.TRIG_MODE_FREE,
qtgui.TRIG_SLOPE_POS, 0.0, 0,
0, "")
self.qtgui_time_sink_x_0.enable_autoscale(False)
self.qtgui_time_sink_x_0.enable_grid(False)
self.qtgui_time_sink_x_0.enable_control_panel(False)
if not True:
self.qtgui_time_sink_x_0.disable_legend()
labels = ["", "", "", "", "", "", "", "", "", ""]
widths = [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
colors = [
"blue", "red", "green", "black", "cyan", "magenta", "yellow",
"dark red", "dark green", "blue"
]
styles = [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
markers = [-1, -1, -1, -1, -1, -1, -1, -1, -1, -1]
alphas = [1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0]
for i in xrange(1):
if len(labels[i]) == 0:
self.qtgui_time_sink_x_0.set_line_label(
i, "Data {0}".format(i))
else:
self.qtgui_time_sink_x_0.set_line_label(i, labels[i])
self.qtgui_time_sink_x_0.set_line_width(i, widths[i])
self.qtgui_time_sink_x_0.set_line_color(i, colors[i])
self.qtgui_time_sink_x_0.set_line_style(i, styles[i])
self.qtgui_time_sink_x_0.set_line_marker(i, markers[i])
self.qtgui_time_sink_x_0.set_line_alpha(i, alphas[i])
self._qtgui_time_sink_x_0_win = sip.wrapinstance(
self.qtgui_time_sink_x_0.pyqwidget(), Qt.QWidget)
self.top_grid_layout.addWidget(self._qtgui_time_sink_x_0_win, 0, 1, 3,
1)
self.qtgui_freq_sink_x_0_0 = qtgui.freq_sink_c(
1024, #size
firdes.WIN_BLACKMAN_hARRIS, #wintype
0, #fc
final_rate, #bw
"Decimated Channel", #name
1 #number of inputs
)
self.qtgui_freq_sink_x_0_0.set_update_time(0.10)
self.qtgui_freq_sink_x_0_0.set_y_axis(-200, -60)
self.qtgui_freq_sink_x_0_0.set_trigger_mode(qtgui.TRIG_MODE_FREE, 0.0,
0, "")
self.qtgui_freq_sink_x_0_0.enable_autoscale(False)
self.qtgui_freq_sink_x_0_0.enable_grid(False)
self.qtgui_freq_sink_x_0_0.set_fft_average(1.0)
self.qtgui_freq_sink_x_0_0.enable_control_panel(False)
if not True:
self.qtgui_freq_sink_x_0_0.disable_legend()
if complex == type(float()):
self.qtgui_freq_sink_x_0_0.set_plot_pos_half(not True)
labels = ["", "", "", "", "", "", "", "", "", ""]
widths = [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
colors = [
"blue", "red", "green", "black", "cyan", "magenta", "yellow",
"dark red", "dark green", "dark blue"
]
alphas = [1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0]
for i in xrange(1):
if len(labels[i]) == 0:
self.qtgui_freq_sink_x_0_0.set_line_label(
i, "Data {0}".format(i))
else:
self.qtgui_freq_sink_x_0_0.set_line_label(i, labels[i])
self.qtgui_freq_sink_x_0_0.set_line_width(i, widths[i])
self.qtgui_freq_sink_x_0_0.set_line_color(i, colors[i])
self.qtgui_freq_sink_x_0_0.set_line_alpha(i, alphas[i])
self._qtgui_freq_sink_x_0_0_win = sip.wrapinstance(
self.qtgui_freq_sink_x_0_0.pyqwidget(), Qt.QWidget)
self.top_grid_layout.addWidget(self._qtgui_freq_sink_x_0_0_win, 3, 0,
3, 1)
self.qtgui_freq_sink_x_0 = qtgui.freq_sink_c(
fft_length, #size
firdes.WIN_BLACKMAN_hARRIS, #wintype
144E6, #fc
samp_rate, #bw
"Spectrum", #name
1 #number of inputs
)
self.qtgui_freq_sink_x_0.set_update_time(0.10)
self.qtgui_freq_sink_x_0.set_y_axis(-120, -20)
self.qtgui_freq_sink_x_0.set_trigger_mode(qtgui.TRIG_MODE_FREE, 0.0, 0,
"")
self.qtgui_freq_sink_x_0.enable_autoscale(False)
self.qtgui_freq_sink_x_0.enable_grid(False)
self.qtgui_freq_sink_x_0.set_fft_average(1.0)
self.qtgui_freq_sink_x_0.enable_control_panel(False)
if not True:
self.qtgui_freq_sink_x_0.disable_legend()
if complex == type(float()):
self.qtgui_freq_sink_x_0.set_plot_pos_half(not True)
labels = ["", "", "", "", "", "", "", "", "", ""]
widths = [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
colors = [
"blue", "red", "green", "black", "cyan", "magenta", "yellow",
"dark red", "dark green", "dark blue"
]
alphas = [1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0]
for i in xrange(1):
if len(labels[i]) == 0:
self.qtgui_freq_sink_x_0.set_line_label(
i, "Data {0}".format(i))
else:
self.qtgui_freq_sink_x_0.set_line_label(i, labels[i])
self.qtgui_freq_sink_x_0.set_line_width(i, widths[i])
self.qtgui_freq_sink_x_0.set_line_color(i, colors[i])
self.qtgui_freq_sink_x_0.set_line_alpha(i, alphas[i])
self._qtgui_freq_sink_x_0_win = sip.wrapinstance(
self.qtgui_freq_sink_x_0.pyqwidget(), Qt.QWidget)
self.top_grid_layout.addWidget(self._qtgui_freq_sink_x_0_win, 0, 0, 3,
1)
self.pfb_arb_resampler_xxx_0 = pfb.arb_resampler_fff(
16E3 / float(final_rate / 5), taps=None, flt_size=32)
self.pfb_arb_resampler_xxx_0.declare_sample_delay(0)
self.osmosdr_source_0 = osmosdr.source(args="numchan=" + str(1) + " " +
"uhd")
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(0, 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(False, 0)
self.osmosdr_source_0.set_gain(gain_db, 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(samp_rate * 0.8, 0)
self.freq_xlating_fir_filter_xxx_0 = filter.freq_xlating_fir_filter_ccc(
initial_decim, (variable_low_pass_filter_taps_0), demod_bb_freq,
samp_rate)
self.fir_filter_xxx_0_1 = filter.fir_filter_fff(
initial_decim, (variable_low_pass_filter_taps_0))
self.fir_filter_xxx_0_1.declare_sample_delay(0)
self.fir_filter_xxx_0_0 = filter.fir_filter_ccc(
int(samp_rate / 1E6), (variable_low_pass_filter_taps_0))
self.fir_filter_xxx_0_0.declare_sample_delay(0)
self.fir_filter_xxx_0 = filter.fir_filter_ccc(
initial_decim, (variable_low_pass_filter_taps_0))
self.fir_filter_xxx_0.declare_sample_delay(0)
self.fft_vxx_0 = fft.fft_vcc(fft_length, True,
(window.blackmanharris(fft_length)), True,
1)
self.blocks_wavfile_sink_0 = blocks.wavfile_sink(
file_name, 1, 16000, 8)
self.blocks_vector_to_stream_0 = blocks.vector_to_stream(
gr.sizeof_float * 1, fft_length)
self.blocks_stream_to_vector_0 = blocks.stream_to_vector(
gr.sizeof_gr_complex * 1, fft_length)
self.blocks_probe_signal_vx_0 = blocks.probe_signal_vf(fft_length)
self.blocks_nlog10_ff_0 = blocks.nlog10_ff(10, fft_length, 0)
self.blocks_keep_one_in_n_0 = blocks.keep_one_in_n(
gr.sizeof_gr_complex * fft_length,
int(round(samp_rate / fft_length / 1000)))
self.blocks_integrate_xx_0 = blocks.integrate_ff(100, fft_length)
self.blocks_complex_to_mag_squared_0 = blocks.complex_to_mag_squared(
fft_length)
self.audio_sink_0 = audio.sink(16000, "", True)
self.analog_quadrature_demod_cf_0 = analog.quadrature_demod_cf(0.050)
self.analog_pwr_squelch_xx_0_0 = analog.pwr_squelch_ff(
-200, 0.1, 0, True)
self.analog_pwr_squelch_xx_0 = analog.pwr_squelch_cc(
squelch_dB, 0.1, 0, False)
##################################################
# Connections
##################################################
self.connect((self.analog_pwr_squelch_xx_0, 0),
(self.analog_quadrature_demod_cf_0, 0))
self.connect((self.analog_pwr_squelch_xx_0_0, 0),
(self.blocks_wavfile_sink_0, 0))
self.connect((self.analog_quadrature_demod_cf_0, 0),
(self.fir_filter_xxx_0_1, 0))
self.connect((self.blocks_complex_to_mag_squared_0, 0),
(self.blocks_integrate_xx_0, 0))
self.connect((self.blocks_integrate_xx_0, 0),
(self.blocks_nlog10_ff_0, 0))
self.connect((self.blocks_keep_one_in_n_0, 0), (self.fft_vxx_0, 0))
self.connect((self.blocks_nlog10_ff_0, 0),
(self.blocks_probe_signal_vx_0, 0))
self.connect((self.blocks_nlog10_ff_0, 0),
(self.blocks_vector_to_stream_0, 0))
self.connect((self.blocks_stream_to_vector_0, 0),
(self.blocks_keep_one_in_n_0, 0))
self.connect((self.blocks_vector_to_stream_0, 0),
(self.qtgui_time_sink_x_0, 0))
self.connect((self.fft_vxx_0, 0),
(self.blocks_complex_to_mag_squared_0, 0))
self.connect((self.fir_filter_xxx_0, 0), (self.fir_filter_xxx_0_0, 0))
self.connect((self.fir_filter_xxx_0_0, 0),
(self.analog_pwr_squelch_xx_0, 0))
self.connect((self.fir_filter_xxx_0_0, 0),
(self.qtgui_freq_sink_x_0_0, 0))
self.connect((self.fir_filter_xxx_0_1, 0),
(self.pfb_arb_resampler_xxx_0, 0))
self.connect((self.freq_xlating_fir_filter_xxx_0, 0),
(self.fir_filter_xxx_0, 0))
self.connect((self.osmosdr_source_0, 0),
(self.blocks_stream_to_vector_0, 0))
self.connect((self.osmosdr_source_0, 0),
(self.freq_xlating_fir_filter_xxx_0, 0))
self.connect((self.osmosdr_source_0, 0), (self.qtgui_freq_sink_x_0, 0))
self.connect((self.pfb_arb_resampler_xxx_0, 0),
(self.analog_pwr_squelch_xx_0_0, 0))
self.connect((self.pfb_arb_resampler_xxx_0, 0), (self.audio_sink_0, 0))
def build_blocks(self,config):
if not self.device_found:
return
self.error = False
fft_size = self.main.fft_size_control.get_value()
frame_rate = self.main.framerate_control.get_value()
average = self.main.average_control.get_value()
ssb_lo = self.ssb_lo
ssb_hi = self.ssb_hi
USB = self.mode == self.main.MODE_USB or self.mode == self.main.MODE_CW_USB
self.audio_dec_nrw = 1
self.dec_nrw, self.interp_nrw = self.compute_dec_interp(self.sample_rate,self.audio_rate)
self.audio_dec_wid = self.if_sample_rate / self.audio_rate
self.dec_wid, self.interp_wid = self.compute_dec_interp(self.sample_rate,self.if_sample_rate)
volume = .1
self.configure_source_controls()
self.create_update_freq_xlating_fir_filter()
self.analog_agc_cc = analog.agc2_cc(1e-1, 1e-2, 1.0, 1.0)
self.analog_agc_cc.set_max_gain(1)
self.analog_agc_ff = analog.agc2_ff(1e-1, 1e-2, 1.0, 1.0)
self.analog_agc_ff.set_max_gain(1)
self.rational_resampler_wid = filter.rational_resampler_ccc(
decimation=int(self.dec_wid),
interpolation=int(self.interp_wid),
taps=None,
fractional_bw=None,
)
self.rational_resampler_nrw = filter.rational_resampler_ccc(
decimation=int(self.dec_nrw),
interpolation=int(self.interp_nrw),
taps=None,
fractional_bw=None,
)
self.analog_pwr_squelch = analog.pwr_squelch_cc(self.squelch_level, 1e-4, 0, True)
self.analog_pwr_squelch_ssb = analog.pwr_squelch_ff(self.squelch_level, 1e-4, 0, True)
self.blocks_multiply = blocks.multiply_vcc(1)
self.blocks_complex_to_real = blocks.complex_to_real(1)
#self.rebuild_filters(config)
self.blocks_complex_to_mag_am = blocks.complex_to_mag(1)
self.analog_nbfm_rcv = analog.nbfm_rx(
audio_rate=self.audio_rate,
quad_rate=self.audio_rate,
tau=75e-6,
max_dev=6e3,
)
self.analog_wfm_rcv = analog.wfm_rcv(
quad_rate=self.if_sample_rate,
audio_decimation=self.audio_dec_wid,
)
self.hilbert_fc_2 = filter.hilbert_fc(self.hilbert_taps_ssb, firdes.WIN_HAMMING, 6.76)
self.hilbert_fc_1 = filter.hilbert_fc(self.hilbert_taps_ssb, firdes.WIN_HAMMING, 6.76)
self.blocks_multiply_ssb = blocks.multiply_vcc(1)
self.blocks_complex_to_float_ssb = blocks.complex_to_float(1)
self.create_usb_lsb_switch()
self.blocks_add = blocks.add_vff(1)
self.blocks_complex_to_real = blocks.complex_to_real(1)
self.blocks_complex_to_imag = blocks.complex_to_imag(1)
# this is the source for the FFT display's data
self.logpwrfft = logpwrfft.logpwrfft_c(
sample_rate=self.sample_rate,
fft_size=fft_size,
ref_scale=2,
frame_rate=frame_rate,
avg_alpha=average,
average=(average != 1),
)
# this is the main FFT display
self.fft_vector_sink = MyVectorSink(self.main,fft_size)
self.blocks_multiply_const_volume = blocks.multiply_const_vff((volume, ))
# only create this once
if self.audio_sink == None:
try:
self.audio_sink = audio.sink(self.audio_rate, config['audio_device'], True)
except Exception as e:
self.main.message_dialog("Audio Error","A problem has come up while accessing the audio system: %s" % e)
self.error = True
self.audio_sink = None
self.main.af_gain_control.set_value()
def __init__(self):
# Call the initialization method from the parent class
gr.top_block.__init__(self)
# Setup the parser for command line arguments
parser = OptionParser(option_class=eng_option)
parser.add_option("-v", "--verbose", action="store_true",
dest="verbose", default=False,
help="print settings to stdout")
parser.add_option("-a", "--args", type="string", dest="src_args",
default='addr=192.168.1.13',
help="USRP device address args")
parser.add_option("-g", "--gain", type="eng_float", dest="src_gain",
default=0, help="USRP gain in dB")
parser.add_option("-q", "--squelch", type="eng_float",
dest="squelch_thresh", default=-80,
help="Squelch threshold in dB")
parser.add_option("-s", "--soundrate", type="eng_float",
dest="snd_card_rate", default=48000,
help="Sound card rate in Hz (must be n*100 Hz)")
parser.add_option("-c", "--channels", type="string",
dest="channel_file_name",
default='channels.txt',
help="Text file of EOL delimited channels in Hz")
(options, args) = parser.parse_args()
if len(args) != 0:
parser.print_help()
raise SystemExit, 1
# Define the user constants
src_args = str(options.src_args)
src_gain = float(options.src_gain)
squelch_thresh = float(options.squelch_thresh)
snd_card_rate = int(options.snd_card_rate)
channel_file_name = str(options.channel_file_name)
# Define other constants (don't mess with these)
max_rf_bandwidth = 25E6 # Limited by N210
channel_sample_rate = 20000
nbfm_maxdev = 2.5E3
nbfm_tau = 75E-6
# Open file, split to list, remove empty strings, and convert to float
with open(channel_file_name) as chanfile:
lines = chanfile.read().splitlines()
chanfile.close()
lines = __builtin__.filter(None, lines)
chanlist = [float(chan) for chan in lines]
# Source decimation is first deternmined by the required RF bandwidth
rf_bandwidth = max(chanlist) - min(chanlist) + 2*channel_sample_rate
src_decimation = int(math.floor(max_rf_bandwidth/rf_bandwidth))
# Check if rf_bandwidth is too wide
if rf_bandwidth > max_rf_bandwidth:
print 'Error: Channels spaced beyond the \
%f MHz maximum RF bandwidth!' % (max_rf_bandwidth/1E6)
sys.exit([1])
else:
pass
# Don't let the source decimation go above 100 (USRP N210 limit)
if src_decimation > 100:
src_decimation = 100
# This is a little tricky
# Don't want odd values of source decimation greater than 1
# Also want the source sample rate \
# to be an integer multiple of channel sample rate
src_sample_rate = max_rf_bandwidth / src_decimation
while ((src_decimation%2 != 0) or \
((max_rf_bandwidth/src_decimation) % channel_sample_rate != 0)) \
and src_decimation > 1:
src_decimation = src_decimation - 1
src_sample_rate = max_rf_bandwidth / src_decimation
# Calculate the channel decimation for the fxlating filter
# (it will be an integer)
channel_decimation = int(src_sample_rate / channel_sample_rate)
# Calculate center frequency
src_center_freq = (max(chanlist) + min(chanlist)) / 2
# Print some info to stdout for verbose option
if options.verbose:
print 'Source args string "%s" ' % src_args
print 'Source center frequency = %f MHz' % (src_center_freq/1E6)
print 'Source decimation = %i' % src_decimation
print 'Source sample rate = %i Hz' % src_sample_rate
print 'Source gain = %i dB' % src_gain
print 'Squelch threshold = %i dB' % squelch_thresh
print 'Channel decimation = %i' % channel_decimation
print 'Channel sample rate = %i Hz' % channel_sample_rate
print 'Sound card rate = %i Hz' % snd_card_rate
print 'Channel list = %s' % str(chanlist)
# Setup the source
src = uhd.usrp_source(src_args, uhd.io_type_t.COMPLEX_FLOAT32, 1)
src.set_samp_rate(src_sample_rate)
src.set_center_freq(src_center_freq, 0)
src.set_gain(src_gain, 0)
# Get USRP true center frequency
# Do nothing with it as it's only a few Hz error
#print src.get_center_freq()
# Create N channel flows---------------------------------------------
# Design taps for frequency translating FIR filter
filter_taps = filter.firdes.low_pass(1.0,
src_sample_rate,
8E3,
2E3,
filter.firdes.WIN_HAMMING)
# N parallel fxlating FIR filter with decimation to channel rate
# Note how the tune freq is chan-src_center_freq ; reversed from GR 3.6
fxlate = [filter.freq_xlating_fir_filter_ccc(channel_decimation,
filter_taps,
chan - src_center_freq,
src_sample_rate)
for chan in chanlist]
# Power squelch (complex, non blocking) prior to NBFM
squelch1 = [analog.pwr_squelch_cc(squelch_thresh,
0.1,
1,
False) for chan in chanlist]
# NBFM receiver
nbfm = [analog.nbfm_rx(channel_sample_rate,
channel_sample_rate,
nbfm_tau,
nbfm_maxdev) for chan in chanlist]
# Power squelch (float, blocking) prior to wav file resampling
squelch2 = [analog.pwr_squelch_ff(squelch_thresh,
0.1,
1,
True) for chan in chanlist]
# Rational resampler for channel rate to 8 kHz wav file rate
resampwav = [filter.rational_resampler_fff(8000,
int(channel_sample_rate))
for chan in chanlist]
# Wav file sink
wavfile = [blocks.wavfile_sink(str(int(chan))+'.wav',
1,
8000,
8) for chan in chanlist]
# Connect the blocks
for chan in range(len(chanlist)):
self.connect(src, fxlate[chan], squelch1[chan], nbfm[chan],
squelch2[chan], resampwav[chan], wavfile[chan])
# Adder to sum the nbfm outputs for sound card
adder = blocks.add_vff(1)
# Rational resampler for channel rate to audio rate
resampsc = filter.rational_resampler_fff(int(snd_card_rate),
int(channel_sample_rate))
# Sound card sink
sndcard = audio.sink(snd_card_rate, "", True)
# Connect the blocks
for chan in range(len(chanlist)):
self.connect(nbfm[chan], (adder, chan))
# Connect the blocks
self.connect(adder, resampsc, sndcard)
def __init__(self,
samp_rate=4E6,
audio_rate=8000,
record=True,
audio_bps=8):
gr.hier_block2.__init__(self, "TunerDemodAM",
gr.io_signature(1, 1, gr.sizeof_gr_complex),
gr.io_signature(1, 1, gr.sizeof_float))
# Default values
self.center_freq = 0
squelch_db = -60
self.agc_ref = 0.1
self.file_name = "/dev/null"
self.record = record
# Decimation values for four stages of decimation
decims = (5, int(samp_rate / 1E6))
# Low pass filter taps for decimation by 5
low_pass_filter_taps_0 = \
grfilter.firdes_low_pass(1, 1, 0.090, 0.010,
grfilter.firdes.WIN_HAMMING)
# Frequency translating FIR filter decimating by 5
self.freq_xlating_fir_filter_ccc = \
grfilter.freq_xlating_fir_filter_ccc(decims[0],
low_pass_filter_taps_0,
self.center_freq, samp_rate)
# FIR filter decimating by 5
fir_filter_ccc_0 = grfilter.fir_filter_ccc(decims[0],
low_pass_filter_taps_0)
# Low pass filter taps for decimation from samp_rate/25 to 40-79.9 ksps
# In other words, decimation by int(samp_rate/1E6)
# 12.5 kHz cutoff for NBFM channel bandwidth
low_pass_filter_taps_1 = grfilter.firdes_low_pass(
1, samp_rate / decims[0]**2, 12.5E3, 1E3,
grfilter.firdes.WIN_HAMMING)
# FIR filter decimation by int(samp_rate/1E6)
fir_filter_ccc_1 = grfilter.fir_filter_ccc(decims[1],
low_pass_filter_taps_1)
# Non blocking power squelch
# Squelch level needs to be lower than NBFM or else choppy AM demod
self.analog_pwr_squelch_cc = analog.pwr_squelch_cc(
squelch_db, 1e-1, 0, False)
# AGC with reference set for nomninal 0 dB volume
# Paramaters tweaked to prevent impulse during squelching
self.agc3_cc = analog.agc3_cc(1.0, 1E-4, self.agc_ref, 10, 1)
self.agc3_cc.set_max_gain(65536)
# AM demod with complex_to_mag()
# Can't use analog.am_demod_cf() since it won't work with N>2 demods
am_demod_cf = blocks.complex_to_mag(1)
# 3.5 kHz cutoff for audio bandwidth
low_pass_filter_taps_2 = grfilter.firdes_low_pass(1,\
samp_rate/(decims[1] * decims[0]**2),\
3.5E3, 500, grfilter.firdes.WIN_HAMMING)
# FIR filter decimating by 5 from 40-79.9 ksps to 8-15.98 ksps
fir_filter_fff_0 = grfilter.fir_filter_fff(decims[0],
low_pass_filter_taps_2)
# Polyphase resampler allows arbitary RF sample rates
# Takes 8-15.98 ksps to a constant 8 ksps for audio
pfb_resamp = audio_rate / float(samp_rate / (decims[1] * decims[0]**3))
pfb_arb_resampler_fff = pfb.arb_resampler_fff(pfb_resamp,
taps=None,
flt_size=32)
# Connect the blocks for the demod
self.connect(self, self.freq_xlating_fir_filter_ccc)
self.connect(self.freq_xlating_fir_filter_ccc, fir_filter_ccc_0)
self.connect(fir_filter_ccc_0, fir_filter_ccc_1)
self.connect(fir_filter_ccc_1, self.analog_pwr_squelch_cc)
self.connect(self.analog_pwr_squelch_cc, self.agc3_cc)
self.connect(self.agc3_cc, am_demod_cf)
self.connect(am_demod_cf, fir_filter_fff_0)
self.connect(fir_filter_fff_0, pfb_arb_resampler_fff)
self.connect(pfb_arb_resampler_fff, self)
# Need to set this to a very low value of -200 since it is after demod
# Only want it to gate when the previous squelch has gone to zero
analog_pwr_squelch_ff = analog.pwr_squelch_ff(-200, 1e-1, 0, True)
# File sink with single channel and 8 bits/sample
self.blocks_wavfile_sink = blocks.wavfile_sink(self.file_name, 1,
audio_rate, audio_bps)
# Connect the blocks for recording
self.connect(pfb_arb_resampler_fff, analog_pwr_squelch_ff)
self.connect(analog_pwr_squelch_ff, self.blocks_wavfile_sink)
def __init__(self):
grc_wxgui.top_block_gui.__init__(self, title="Acars")
_icon_path = "C:\Program Files\GNURadio-3.7\share\icons\hicolor\scalable/apps\gnuradio-grc.png"
self.SetIcon(wx.Icon(_icon_path, wx.BITMAP_TYPE_ANY))
##################################################
# Variables
##################################################
self.samp_rate = samp_rate = 250000
##################################################
# Blocks
##################################################
self.wxgui_waterfallsink2_0 = waterfallsink2.waterfall_sink_c(
self.GetWin(),
baseband_freq=0,
dynamic_range=100,
ref_level=0,
ref_scale=2.0,
sample_rate=samp_rate,
fft_size=1024,
fft_rate=15,
average=False,
avg_alpha=None,
title='Waterfall Plot',
)
self.Add(self.wxgui_waterfallsink2_0.win)
self.wxgui_fftsink2_0_0 = fftsink2.fft_sink_c(
self.GetWin(),
baseband_freq=0,
y_per_div=10,
y_divs=10,
ref_level=0,
ref_scale=2.0,
sample_rate=192000,
fft_size=1024,
fft_rate=15,
average=False,
avg_alpha=None,
title='FFT Plot',
peak_hold=False,
)
self.Add(self.wxgui_fftsink2_0_0.win)
self.rtlsdr_source_0 = osmosdr.source(args="numchan=" + str(1) + " " +
'')
self.rtlsdr_source_0.set_sample_rate(samp_rate)
self.rtlsdr_source_0.set_center_freq(131.550e6, 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(True, 0)
self.rtlsdr_source_0.set_gain(40, 0)
self.rtlsdr_source_0.set_if_gain(20, 0)
self.rtlsdr_source_0.set_bb_gain(20, 0)
self.rtlsdr_source_0.set_antenna('', 0)
self.rtlsdr_source_0.set_bandwidth(0, 0)
self.rational_resampler_xxx_0 = filter.rational_resampler_fff(
interpolation=48000,
decimation=250000,
taps=None,
fractional_bw=None,
)
self.low_pass_filter_0 = filter.fir_filter_ccf(
1,
firdes.low_pass(1, samp_rate, 5000, 100, firdes.WIN_HAMMING, 6.76))
self.blocks_wavfile_sink_0 = blocks.wavfile_sink(
'D:\\Projects\\SDR\\EE-504-Intro-Project\\acars_test2.wav', 1,
48000, 16)
self.blocks_complex_to_mag_0 = blocks.complex_to_mag(1)
self.audio_sink_0 = audio.sink(48000, '', True)
self.analog_pwr_squelch_xx_0 = analog.pwr_squelch_ff(
-20, 1e-3, 0, False)
##################################################
# Connections
##################################################
self.connect((self.analog_pwr_squelch_xx_0, 0),
(self.blocks_wavfile_sink_0, 0))
self.connect((self.blocks_complex_to_mag_0, 0),
(self.rational_resampler_xxx_0, 0))
self.connect((self.low_pass_filter_0, 0),
(self.blocks_complex_to_mag_0, 0))
self.connect((self.low_pass_filter_0, 0), (self.wxgui_fftsink2_0_0, 0))
self.connect((self.rational_resampler_xxx_0, 0),
(self.analog_pwr_squelch_xx_0, 0))
self.connect((self.rational_resampler_xxx_0, 0),
(self.audio_sink_0, 0))
self.connect((self.rtlsdr_source_0, 0), (self.low_pass_filter_0, 0))
self.connect((self.rtlsdr_source_0, 0),
(self.wxgui_waterfallsink2_0, 0))
def __init__(self):
# Call the initialization method from the parent class
gr.top_block.__init__(self)
# Setup the parser for command line arguments
parser = OptionParser(option_class=eng_option)
parser.add_option("-v",
"--verbose",
action="store_true",
dest="verbose",
default=False,
help="print settings to stdout")
parser.add_option("-a",
"--args",
type="string",
dest="src_args",
default='addr=192.168.1.13',
help="USRP device address args")
parser.add_option("-g",
"--gain",
type="eng_float",
dest="src_gain",
default=0,
help="USRP gain in dB")
parser.add_option("-q",
"--squelch",
type="eng_float",
dest="squelch_thresh",
default=-80,
help="Squelch threshold in dB")
parser.add_option("-s",
"--soundrate",
type="eng_float",
dest="snd_card_rate",
default=48000,
help="Sound card rate in Hz (must be n*100 Hz)")
parser.add_option("-c",
"--channels",
type="string",
dest="channel_file_name",
default='channels.txt',
help="Text file of EOL delimited channels in Hz")
(options, args) = parser.parse_args()
if len(args) != 0:
parser.print_help()
raise SystemExit, 1
# Define the user constants
src_args = str(options.src_args)
src_gain = float(options.src_gain)
squelch_thresh = float(options.squelch_thresh)
snd_card_rate = int(options.snd_card_rate)
channel_file_name = str(options.channel_file_name)
# Define other constants (don't mess with these)
max_rf_bandwidth = 25E6 # Limited by N210
channel_sample_rate = 20000
nbfm_maxdev = 2.5E3
nbfm_tau = 75E-6
# Open file, split to list, remove empty strings, and convert to float
with open(channel_file_name) as chanfile:
lines = chanfile.read().splitlines()
chanfile.close()
lines = __builtin__.filter(None, lines)
chanlist = [float(chan) for chan in lines]
# Source decimation is first deternmined by the required RF bandwidth
rf_bandwidth = max(chanlist) - min(chanlist) + 2 * channel_sample_rate
src_decimation = int(math.floor(max_rf_bandwidth / rf_bandwidth))
# Check if rf_bandwidth is too wide
if rf_bandwidth > max_rf_bandwidth:
print 'Error: Channels spaced beyond the \
%f MHz maximum RF bandwidth!' % (max_rf_bandwidth / 1E6)
sys.exit([1])
else:
pass
# Don't let the source decimation go above 100 (USRP N210 limit)
if src_decimation > 100:
src_decimation = 100
# This is a little tricky
# Don't want odd values of source decimation greater than 1
# Also want the source sample rate \
# to be an integer multiple of channel sample rate
src_sample_rate = max_rf_bandwidth / src_decimation
while ((src_decimation%2 != 0) or \
((max_rf_bandwidth/src_decimation) % channel_sample_rate != 0)) \
and src_decimation > 1:
src_decimation = src_decimation - 1
src_sample_rate = max_rf_bandwidth / src_decimation
# Calculate the channel decimation for the fxlating filter
# (it will be an integer)
channel_decimation = int(src_sample_rate / channel_sample_rate)
# Calculate center frequency
src_center_freq = (max(chanlist) + min(chanlist)) / 2
# Print some info to stdout for verbose option
if options.verbose:
print 'Source args string "%s" ' % src_args
print 'Source center frequency = %f MHz' % (src_center_freq / 1E6)
print 'Source decimation = %i' % src_decimation
print 'Source sample rate = %i Hz' % src_sample_rate
print 'Source gain = %i dB' % src_gain
print 'Squelch threshold = %i dB' % squelch_thresh
print 'Channel decimation = %i' % channel_decimation
print 'Channel sample rate = %i Hz' % channel_sample_rate
print 'Sound card rate = %i Hz' % snd_card_rate
print 'Channel list = %s' % str(chanlist)
# Setup the source
src = uhd.usrp_source(src_args, uhd.io_type_t.COMPLEX_FLOAT32, 1)
src.set_samp_rate(src_sample_rate)
src.set_center_freq(src_center_freq, 0)
src.set_gain(src_gain, 0)
# Get USRP true center frequency
# Do nothing with it as it's only a few Hz error
#print src.get_center_freq()
# Create N channel flows---------------------------------------------
# Design taps for frequency translating FIR filter
filter_taps = filter.firdes.low_pass(1.0, src_sample_rate, 8E3, 2E3,
filter.firdes.WIN_HAMMING)
# N parallel fxlating FIR filter with decimation to channel rate
# Note how the tune freq is chan-src_center_freq ; reversed from GR 3.6
fxlate = [
filter.freq_xlating_fir_filter_ccc(channel_decimation, filter_taps,
chan - src_center_freq,
src_sample_rate)
for chan in chanlist
]
# Power squelch (complex, non blocking) prior to NBFM
squelch1 = [
analog.pwr_squelch_cc(squelch_thresh, 0.1, 1, False)
for chan in chanlist
]
# NBFM receiver
nbfm = [
analog.nbfm_rx(channel_sample_rate, channel_sample_rate, nbfm_tau,
nbfm_maxdev) for chan in chanlist
]
# Power squelch (float, blocking) prior to wav file resampling
squelch2 = [
analog.pwr_squelch_ff(squelch_thresh, 0.1, 1, True)
for chan in chanlist
]
# Rational resampler for channel rate to 8 kHz wav file rate
resampwav = [
filter.rational_resampler_fff(8000, int(channel_sample_rate))
for chan in chanlist
]
# Wav file sink
wavfile = [
blocks.wavfile_sink(str(int(chan)) + '.wav', 1, 8000, 8)
for chan in chanlist
]
# Connect the blocks
for chan in range(len(chanlist)):
self.connect(src, fxlate[chan], squelch1[chan], nbfm[chan],
squelch2[chan], resampwav[chan], wavfile[chan])
# Adder to sum the nbfm outputs for sound card
adder = blocks.add_vff(1)
# Rational resampler for channel rate to audio rate
resampsc = filter.rational_resampler_fff(int(snd_card_rate),
int(channel_sample_rate))
# Sound card sink
sndcard = audio.sink(snd_card_rate, "", True)
# Connect the blocks
for chan in range(len(chanlist)):
self.connect(nbfm[chan], (adder, chan))
# Connect the blocks
self.connect(adder, resampsc, sndcard)
def __init__(self):
gr.top_block.__init__(self, "Top Block")
##################################################
# Variables
##################################################
self.audio_rate = audio_rate = int(48e3)
self.rtl_rate = rtl_rate = int(240e3)
self.out_intermediary_rate = out_intermediary_rate = audio_rate*4
self.out_gain = out_gain = .25
self.out_frequency_offset = out_frequency_offset = -50e3
self.out_frequency = out_frequency = 145.521e6
self.out_audio_inverted = out_audio_inverted = True
self.in_frequency_offset = in_frequency_offset = 0
self.in_frequency = in_frequency = 145.551e6
self.in_final_gain = in_final_gain = 0.5
self.in_decimation_factor = in_decimation_factor = 8
self.in_audio_inverted = in_audio_inverted = True
self.hackrf_rate = hackrf_rate = 2e6
self.dstar_bandwidth = dstar_bandwidth = 6.5e3
##################################################
# Blocks
##################################################
self.rtlsdr_source_0 = osmosdr.source( args="numchan=" + str(1) + " " + "" )
self.rtlsdr_source_0.set_sample_rate(rtl_rate)
self.rtlsdr_source_0.set_center_freq(in_frequency+in_frequency_offset, 0)
self.rtlsdr_source_0.set_freq_corr(69, 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(False, 0)
self.rtlsdr_source_0.set_gain(10, 0)
self.rtlsdr_source_0.set_if_gain(20, 0)
self.rtlsdr_source_0.set_bb_gain(20, 0)
self.rtlsdr_source_0.set_antenna("", 0)
self.rtlsdr_source_0.set_bandwidth(0, 0)
self.rational_resampler_xxx_3 = filter.rational_resampler_ccc(
interpolation=int(hackrf_rate),
decimation=out_intermediary_rate,
taps=None,
fractional_bw=None,
)
self.osmosdr_sink_0 = osmosdr.sink( args="numchan=" + str(1) + " " + "" )
self.osmosdr_sink_0.set_sample_rate(hackrf_rate)
self.osmosdr_sink_0.set_center_freq(out_frequency-out_frequency_offset, 0)
self.osmosdr_sink_0.set_freq_corr(4, 0)
self.osmosdr_sink_0.set_gain(14, 0)
self.osmosdr_sink_0.set_if_gain(0, 0)
self.osmosdr_sink_0.set_bb_gain(0, 0)
self.osmosdr_sink_0.set_antenna("0", 0)
self.osmosdr_sink_0.set_bandwidth(100e3, 0)
self.low_pass_filter_1 = filter.fir_filter_ccf(5, firdes.low_pass(
1, rtl_rate, dstar_bandwidth*2, 500, firdes.WIN_HAMMING, 6.76))
self.low_pass_filter_0 = filter.fir_filter_fff(1, firdes.low_pass(
1, audio_rate, dstar_bandwidth*2, 200, firdes.WIN_KAISER, 6.76))
self.freq_xlating_fft_filter_ccc_0 = filter.freq_xlating_fft_filter_ccc(1, (1, ), 0-out_frequency_offset, out_intermediary_rate)
self.freq_xlating_fft_filter_ccc_0.set_nthreads(1)
self.freq_xlating_fft_filter_ccc_0.declare_sample_delay(0)
self.dc_blocker_xx_0 = filter.dc_blocker_ff(128, True)
self.blocks_multiply_const_vxx_2 = blocks.multiply_const_vff(((-1 if out_audio_inverted else 1)*out_gain, ))
self.blocks_multiply_const_vxx_1 = blocks.multiply_const_vff((0-in_final_gain if in_audio_inverted else in_final_gain, ))
self.audio_source_0 = audio.source(audio_rate, "hw:10,1", True)
self.audio_sink_1 = audio.sink(audio_rate, "plughw:11,0", True)
self.analog_pwr_squelch_xx_1 = analog.pwr_squelch_cc(-30, 1, 1, False)
self.analog_pwr_squelch_xx_0 = analog.pwr_squelch_ff(-60, 1, 1, True)
self.analog_nbfm_tx_0 = analog.nbfm_tx(
audio_rate=int(audio_rate),
quad_rate=int(out_intermediary_rate),
tau=0,
max_dev=dstar_bandwidth,
)
self.analog_nbfm_rx_0 = analog.nbfm_rx(
audio_rate=audio_rate,
quad_rate=audio_rate,
tau=0.000000000000000000001,
max_dev=dstar_bandwidth*2,
)
##################################################
# Connections
##################################################
self.connect((self.analog_nbfm_rx_0, 0), (self.blocks_multiply_const_vxx_1, 0))
self.connect((self.analog_nbfm_tx_0, 0), (self.freq_xlating_fft_filter_ccc_0, 0))
self.connect((self.analog_pwr_squelch_xx_0, 0), (self.blocks_multiply_const_vxx_2, 0))
self.connect((self.analog_pwr_squelch_xx_1, 0), (self.analog_nbfm_rx_0, 0))
self.connect((self.audio_source_0, 0), (self.dc_blocker_xx_0, 0))
self.connect((self.blocks_multiply_const_vxx_1, 0), (self.audio_sink_1, 0))
self.connect((self.blocks_multiply_const_vxx_2, 0), (self.low_pass_filter_0, 0))
self.connect((self.dc_blocker_xx_0, 0), (self.analog_pwr_squelch_xx_0, 0))
self.connect((self.freq_xlating_fft_filter_ccc_0, 0), (self.rational_resampler_xxx_3, 0))
self.connect((self.low_pass_filter_0, 0), (self.analog_nbfm_tx_0, 0))
self.connect((self.low_pass_filter_1, 0), (self.analog_pwr_squelch_xx_1, 0))
self.connect((self.rational_resampler_xxx_3, 0), (self.osmosdr_sink_0, 0))
self.connect((self.rtlsdr_source_0, 0), (self.low_pass_filter_1, 0))
def configure_blocks(self, protocol):
if protocol == 'provoice' or protocol == 'analog_edacs':
protocol = 'analog'
self.log.debug('configure_blocks(%s)' % protocol)
if not (protocol == 'p25' or protocol == 'p25_tdma'
or protocol == 'p25_cqpsk' or protocol == 'p25_cqpsk_tdma'
or protocol == 'provoice' or protocol == 'dsd_p25'
or protocol == 'analog' or protocol == 'none'):
raise Exception('Invalid protocol %s' % protocol)
if self.protocol == protocol:
return True
self.lock()
if self.protocol == 'analog':
self.disconnect(self.source, self.signal_squelch, self.audiodemod,
self.high_pass, self.resampler, self.sink)
self.signal_squelch = None
self.audiodemod = None
self.high_pass = None
self.resampler = None
elif self.protocol == 'p25' or 'p25_tdma':
try:
self.disconnect(self.source, self.prefilter,
self.fm_demod) #, (self.subtract,0))
self.disconnect(self.fm_demod, self.symbol_filter,
self.demod_fsk4, self.slicer, self.decoder,
self.float_conversion, self.sink)
self.disconnect(self.slicer, self.decoder2, self.qsink)
self.demod_watcher.keep_running = False
except:
pass
#self.disconnect(self.fm_demod, self.avg, self.mult, (self.subtract,1))
self.prefilter = None
self.fm_demod = None
#self.avg = None
#self.mult = None
#self.subtract = None
self.symbol_filter = None
self.demod_fsk4 = None
self.slicer = None
self.decoder = None
self.decoder2 = None
self.qsink = None
self.imbe = None
self.float_conversion = None
self.resampler = None
elif self.protocol == 'p25_cqpsk' or self.protocol == 'p25_cqpsk_tdma':
self.disconnect(self.source, self.resampler, self.agc,
self.symbol_filter_c, self.clock, self.diffdec,
self.to_float, self.rescale, self.slicer,
self.decoder2, self.qsink) #, (self.subtract,0))
self.disconnect(self.slicer, self.decoder, self.float_conversion,
self.sink)
self.prefilter = None
self.resampler = None
self.agc = None
self.symbol_filter_c = None
self.clock = None
self.diffdec = None
self.to_float = None
self.rescale = None
self.slicer = None
self.imbe = None
self.decodequeue3 = None
self.decodequeue2 = None
self.decodequeue = None
self.demod_watcher = None
self.decoder = None
self.decoder2 = None
self.qsink = None
self.float_conversion = None
elif self.protocol == 'provoice':
self.disconnect(self.source, self.fm_demod, self.resampler_in,
self.dsd, self.out_squelch, self.sink)
self.fm_demod = None
self.resampler_in = None
self.dsd = None
self.out_squelch = None
elif self.protocol == 'dsd_p25':
self.disconnect(self.source, self.fm_demod, self.resampler_in,
self.dsd, self.sink)
self.fm_demod = None
self.resampler_in = None
self.dsd = None
self.protocol = protocol
if protocol == 'analog':
self.signal_squelch = analog.pwr_squelch_cc(-100, 0.01, 0, True)
#self.tone_squelch = gr.tone_squelch_ff(audiorate, 4800.0, 0.05, 300, 0, True)
#tone squelch is EDACS ONLY
self.audiodemod = analog.fm_demod_cf(
channel_rate=self.input_rate,
audio_decim=1,
deviation=15000,
audio_pass=(self.input_rate * 0.25),
audio_stop=((self.input_rate * 0.25) + 2000),
gain=8,
tau=75e-6)
self.high_pass = filter.fir_filter_fff(
1,
firdes.high_pass(1, self.input_rate, 300, 30,
firdes.WIN_HAMMING, 6.76))
self.resampler = filter.rational_resampler_fff(
interpolation=8000,
decimation=self.input_rate,
taps=None,
fractional_bw=None,
)
self.connect(self.source, self.signal_squelch, self.audiodemod,
self.high_pass, self.resampler, self.sink)
elif protocol == 'p25' or protocol == 'p25_tdma':
self.symbol_deviation = symbol_deviation = 600.0
if protocol == 'p25_tdma':
symbol_rate = 6000
else:
symbol_rate = 4800
channel_rate = self.input_rate
self.prefilter = filter.freq_xlating_fir_filter_ccc(
1, (1, ), 0, self.input_rate)
fm_demod_gain = channel_rate / (2.0 * pi * symbol_deviation)
self.fm_demod = analog.quadrature_demod_cf(fm_demod_gain)
#self.avg = blocks.moving_average_ff(1000, 1, 4000)
#self.mult = blocks.multiply_const_vff((0.001, ))
#self.subtract = blocks.sub_ff(1)
symbol_decim = 1
samples_per_symbol = channel_rate // symbol_rate
symbol_coeffs = (1.0 / samples_per_symbol, ) * samples_per_symbol
self.symbol_filter = filter.fir_filter_fff(symbol_decim,
symbol_coeffs)
autotuneq = gr.msg_queue(2)
self.demod_fsk4 = op25.fsk4_demod_ff(autotuneq, channel_rate,
symbol_rate)
# symbol slicer
levels = [-2.0, 0.0, 2.0, 4.0]
self.slicer = op25.fsk4_slicer_fb(levels)
self.imbe = repeater.vocoder(False, True, 0, "", 0, False)
self.decodequeue3 = decodequeue3 = gr.msg_queue(10000)
self.decodequeue2 = decodequeue2 = gr.msg_queue(10000)
self.decodequeue = decodequeue = gr.msg_queue(10000)
self.demod_watcher = None #demod_watcher(decodequeue2, self.adjust_channel_offset)
self.decoder = repeater.p25_frame_assembler(
'', 0, 0, True, True, False, decodequeue2, True,
(True if protocol == 'p25_tdma' else False))
self.decoder2 = repeater.p25_frame_assembler(
'', 0, 0, False, True, False, decodequeue3, False, False)
self.qsink = blocks.message_sink(gr.sizeof_char, self.decodequeue,
False)
self.float_conversion = blocks.short_to_float(1, 8192)
self.connect(self.source, self.prefilter,
self.fm_demod) #, (self.subtract,0))
#self.connect(self.fm_demod, self.symbol_filter, self.demod_fsk4, self.slicer, self.decoder, self.imbe, self.float_conversion, self.sink)
self.connect(self.fm_demod, self.symbol_filter, self.demod_fsk4,
self.slicer, self.decoder, self.float_conversion,
self.sink)
self.connect(self.slicer, self.decoder2, self.qsink)
#self.connect(self.fm_demod, self.avg, self.mult, (self.subtract,1))
elif protocol == 'p25_cqpsk' or protocol == 'p25_cqpsk_tdma':
self.symbol_deviation = symbol_deviation = 600.0
self.resampler = blocks.multiply_const_cc(1.0)
self.agc = analog.feedforward_agc_cc(1024, 1.0)
self.symbol_filter_c = blocks.multiply_const_cc(1.0)
gain_mu = 0.025
if protocol == 'p25_cqpsk_tdma':
symbol_rate = 6000
else:
symbol_rate = 4800
omega = float(self.input_rate) / float(symbol_rate)
gain_omega = 0.1 * gain_mu * gain_mu
alpha = 0.04
beta = 0.125 * alpha * alpha
fmax = 1200 # Hz
fmax = 2 * pi * fmax / float(self.input_rate)
self.clock = repeater.gardner_costas_cc(omega, gain_mu, gain_omega,
alpha, beta, fmax, -fmax)
self.diffdec = digital.diff_phasor_cc()
self.to_float = blocks.complex_to_arg()
self.rescale = blocks.multiply_const_ff((1 / (pi / 4)))
# symbol slicer
levels = [-2.0, 0.0, 2.0, 4.0]
self.slicer = op25.fsk4_slicer_fb(levels)
#self.imbe = repeater.vocoder(False, True, 0, "", 0, False)
self.decodequeue3 = decodequeue3 = gr.msg_queue(2)
self.decodequeue2 = decodequeue2 = gr.msg_queue(2)
self.decodequeue = decodequeue = gr.msg_queue(10000)
#self.demod_watcher = demod_watcher(decodequeue2, self.adjust_channel_offset)
self.decoder = repeater.p25_frame_assembler(
'', 0, 0, True, True, False, decodequeue2, True,
(False if protocol == 'p25_cqpsk' else True))
self.decoder2 = repeater.p25_frame_assembler(
'', 0, 0, False, True, True, decodequeue3, False, False)
#temp for debug
#self.debug_sink = blocks.file_sink(1, '/dev/null')
#self.connect(self.slicer, self.debug_sink)
self.qsink = blocks.message_sink(gr.sizeof_char, self.decodequeue,
False)
self.float_conversion = blocks.short_to_float(1, 8192)
self.connect(self.source, self.resampler, self.agc,
self.symbol_filter_c, self.clock, self.diffdec,
self.to_float, self.rescale, self.slicer,
self.decoder2, self.qsink) #, (self.subtract,0))
self.connect(self.slicer, self.decoder, self.float_conversion,
self.sink)
elif protocol == 'provoice':
fm_demod_gain = 0.6
self.fm_demod = analog.quadrature_demod_cf(fm_demod_gain)
self.resampler_in = filter.rational_resampler_fff(
interpolation=48000,
decimation=self.input_rate,
taps=None,
fractional_bw=None,
)
self.dsd = dsd.block_ff(dsd.dsd_FRAME_PROVOICE,
dsd.dsd_MOD_AUTO_SELECT, 3, 0, False)
self.out_squelch = analog.pwr_squelch_ff(-100, 0.01, 0, True)
self.connect(self.source, self.fm_demod, self.resampler_in,
self.dsd, self.out_squelch, self.sink)
elif protocol == 'dsd_p25':
symbol_deviation = 600.0
fm_demod_gain = 0.4 #self.input_rate / (2.0 * pi * symbol_deviation)
self.fm_demod = analog.quadrature_demod_cf(fm_demod_gain)
self.resampler_in = filter.rational_resampler_fff(
interpolation=48000,
decimation=self.input_rate,
taps=None,
fractional_bw=None,
)
self.dsd = dsd.block_ff(dsd.dsd_FRAME_P25_PHASE_1,
dsd.dsd_MOD_AUTO_SELECT, 3, 3, False)
self.connect(self.source, self.fm_demod, self.resampler_in,
self.dsd, self.sink)
self.unlock()
def __init__(self, samp_rate=4E6, audio_rate=8000, record=True):
gr.hier_block2.__init__(self, "TunerDemod",
gr.io_signature(1, 1, gr.sizeof_gr_complex),
gr.io_signature(1, 1, gr.sizeof_float))
# Default values
self.center_freq = 0
squelch_db = -60
self.quad_demod_gain = 0.050
self.file_name = "/dev/null"
self.record = record
# Decimation values for four stages of decimation
decims = (5, int(samp_rate / 1E6))
# Low pass filter taps for decimation by 5
low_pass_filter_taps_0 = \
grfilter.firdes_low_pass(1, 1, 0.090, 0.010,
grfilter.firdes.WIN_HAMMING)
# Frequency translating FIR filter decimating by 5
self.freq_xlating_fir_filter_ccc = \
grfilter.freq_xlating_fir_filter_ccc(decims[0],
low_pass_filter_taps_0,
self.center_freq, samp_rate)
# FIR filter decimating by 5
fir_filter_ccc_0 = grfilter.fir_filter_ccc(decims[0],
low_pass_filter_taps_0)
# Low pass filter taps for decimation from samp_rate/25 to 40-79.9 ksps
# In other words, decimation by int(samp_rate/1E6)
# 12.5 kHz cutoff for NBFM channel bandwidth
low_pass_filter_taps_1 = grfilter.firdes_low_pass(
1, samp_rate / decims[0]**2, 12.5E3, 1E3,
grfilter.firdes.WIN_HAMMING)
# FIR filter decimation by int(samp_rate/1E6)
fir_filter_ccc_1 = grfilter.fir_filter_ccc(decims[1],
low_pass_filter_taps_1)
# Non blocking power squelch
self.analog_pwr_squelch_cc = analog.pwr_squelch_cc(
squelch_db, 1e-1, 0, False)
# Quadrature demod with gain set for decent audio
# This will be later multiplied by the volume
self.analog_quadrature_demod_cf = \
analog.quadrature_demod_cf(self.quad_demod_gain)
# 3.5 kHz cutoff for audio bandwidth
low_pass_filter_taps_2 = grfilter.firdes_low_pass(1,\
samp_rate/(decims[1] * decims[0]**2),\
3.5E3, 500, grfilter.firdes.WIN_HAMMING)
# FIR filter decimating by 5 from 40-79.9 ksps to 8-15.98 ksps
fir_filter_fff_0 = grfilter.fir_filter_fff(decims[0],
low_pass_filter_taps_2)
# Polyphase resampler allows arbitary RF sample rates
# Takes 8-15.98 ksps to a constant 8 ksps for audio
pfb_resamp = audio_rate / float(samp_rate / (decims[1] * decims[0]**3))
pfb_arb_resampler_fff = pfb.arb_resampler_fff(pfb_resamp,
taps=None,
flt_size=32)
# Connect the blocks for the demod
self.connect(self, self.freq_xlating_fir_filter_ccc)
self.connect(self.freq_xlating_fir_filter_ccc, fir_filter_ccc_0)
self.connect(fir_filter_ccc_0, fir_filter_ccc_1)
self.connect(fir_filter_ccc_1, self.analog_pwr_squelch_cc)
self.connect(self.analog_pwr_squelch_cc,
self.analog_quadrature_demod_cf)
self.connect(self.analog_quadrature_demod_cf, fir_filter_fff_0)
self.connect(fir_filter_fff_0, pfb_arb_resampler_fff)
self.connect(pfb_arb_resampler_fff, self)
# Need to set this to a very low value of -200 since it is after demod
# Only want it to gate when the previuos squelch has gone to zero
analog_pwr_squelch_ff = analog.pwr_squelch_ff(-200, 1e-1, 0, True)
# File sink with single channel and 8 bits/sample
self.blocks_wavfile_sink = blocks.wavfile_sink(self.file_name, 1,
audio_rate, 8)
# Connect the blocks for recording
self.connect(pfb_arb_resampler_fff, analog_pwr_squelch_ff)
self.connect(analog_pwr_squelch_ff, self.blocks_wavfile_sink)
def __init__(self):
grc_wxgui.top_block_gui.__init__(self, title="Am")
##################################################
# Variables
##################################################
self.decim = decim = 2
self.adc_rate = adc_rate = 2000000
self.xlate_offset_fine = xlate_offset_fine = 0
self.xlate_offset = xlate_offset = 0
self.xlate_decim = xlate_decim = 4
self.xlate_bandwidth = xlate_bandwidth = 10000
self.volume = volume = 10
self.squelch = squelch = 22
self.samp_rate = samp_rate = adc_rate/decim
self.main_freq = main_freq = 118.568e6
self.audio_rate = audio_rate = 48000
self.audio_interp = audio_interp = 4
##################################################
# Blocks
##################################################
self.main_notebook = self.main_notebook = wx.Notebook(self.GetWin(), style=wx.NB_TOP)
self.main_notebook.AddPage(grc_wxgui.Panel(self.main_notebook), "Baseband")
self.main_notebook.AddPage(grc_wxgui.Panel(self.main_notebook), "Scope")
self.main_notebook.AddPage(grc_wxgui.Panel(self.main_notebook), "Waterfall")
self.main_notebook.AddPage(grc_wxgui.Panel(self.main_notebook), "Quad demod")
self.Add(self.main_notebook)
_xlate_offset_fine_sizer = wx.BoxSizer(wx.VERTICAL)
self._xlate_offset_fine_text_box = forms.text_box(
parent=self.main_notebook.GetPage(0).GetWin(),
sizer=_xlate_offset_fine_sizer,
value=self.xlate_offset_fine,
callback=self.set_xlate_offset_fine,
label="Fine Offset",
converter=forms.float_converter(),
proportion=0,
)
self._xlate_offset_fine_slider = forms.slider(
parent=self.main_notebook.GetPage(0).GetWin(),
sizer=_xlate_offset_fine_sizer,
value=self.xlate_offset_fine,
callback=self.set_xlate_offset_fine,
minimum=-10000,
maximum=10000,
num_steps=100,
style=wx.SL_HORIZONTAL,
cast=float,
proportion=1,
)
self.main_notebook.GetPage(0).Add(_xlate_offset_fine_sizer)
self._xlate_offset_text_box = forms.text_box(
parent=self.main_notebook.GetPage(0).GetWin(),
value=self.xlate_offset,
callback=self.set_xlate_offset,
label="Xlate Offset",
converter=forms.float_converter(),
)
self.main_notebook.GetPage(0).Add(self._xlate_offset_text_box)
_xlate_bandwidth_sizer = wx.BoxSizer(wx.VERTICAL)
self._xlate_bandwidth_text_box = forms.text_box(
parent=self.main_notebook.GetPage(0).GetWin(),
sizer=_xlate_bandwidth_sizer,
value=self.xlate_bandwidth,
callback=self.set_xlate_bandwidth,
label="Xlate Bandwidth",
converter=forms.float_converter(),
proportion=0,
)
self._xlate_bandwidth_slider = forms.slider(
parent=self.main_notebook.GetPage(0).GetWin(),
sizer=_xlate_bandwidth_sizer,
value=self.xlate_bandwidth,
callback=self.set_xlate_bandwidth,
minimum=2500,
maximum=250000,
num_steps=100,
style=wx.SL_HORIZONTAL,
cast=float,
proportion=1,
)
self.main_notebook.GetPage(0).Add(_xlate_bandwidth_sizer)
_squelch_sizer = wx.BoxSizer(wx.VERTICAL)
self._squelch_text_box = forms.text_box(
parent=self.GetWin(),
sizer=_squelch_sizer,
value=self.squelch,
callback=self.set_squelch,
label='squelch',
converter=forms.float_converter(),
proportion=0,
)
self._squelch_slider = forms.slider(
parent=self.GetWin(),
sizer=_squelch_sizer,
value=self.squelch,
callback=self.set_squelch,
minimum=0,
maximum=100,
num_steps=100,
style=wx.SL_HORIZONTAL,
cast=float,
proportion=1,
)
self.Add(_squelch_sizer)
self._main_freq_text_box = forms.text_box(
parent=self.main_notebook.GetPage(0).GetWin(),
value=self.main_freq,
callback=self.set_main_freq,
label="Main Freq",
converter=forms.float_converter(),
)
self.main_notebook.GetPage(0).Add(self._main_freq_text_box)
self.wxgui_waterfallsink2_0 = waterfallsink2.waterfall_sink_c(
self.main_notebook.GetPage(2).GetWin(),
baseband_freq=0,
dynamic_range=100,
ref_level=0,
ref_scale=2.0,
sample_rate=samp_rate,
fft_size=512,
fft_rate=15,
average=False,
avg_alpha=None,
title="Waterfall Plot",
)
self.main_notebook.GetPage(2).Add(self.wxgui_waterfallsink2_0.win)
self.wxgui_fftsink2_0 = fftsink2.fft_sink_c(
self.main_notebook.GetPage(0).GetWin(),
baseband_freq=0,
y_per_div=10,
y_divs=10,
ref_level=0,
ref_scale=2.0,
sample_rate=samp_rate/xlate_decim,
fft_size=1024,
fft_rate=15,
average=False,
avg_alpha=None,
title="FFT Plot",
peak_hold=False,
)
self.main_notebook.GetPage(0).Add(self.wxgui_fftsink2_0.win)
_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=0,
maximum=20,
num_steps=100,
style=wx.SL_HORIZONTAL,
cast=float,
proportion=1,
)
self.Add(_volume_sizer)
self.rtlsdr_source_0 = osmosdr.source( args="numchan=" + str(1) + " " + "" )
self.rtlsdr_source_0.set_sample_rate(samp_rate)
self.rtlsdr_source_0.set_center_freq(main_freq, 0)
self.rtlsdr_source_0.set_freq_corr(0, 0)
self.rtlsdr_source_0.set_dc_offset_mode(2, 0)
self.rtlsdr_source_0.set_iq_balance_mode(2, 0)
self.rtlsdr_source_0.set_gain_mode(True, 0)
self.rtlsdr_source_0.set_gain(50, 0)
self.rtlsdr_source_0.set_if_gain(20, 0)
self.rtlsdr_source_0.set_bb_gain(20, 0)
self.rtlsdr_source_0.set_antenna("", 0)
self.rtlsdr_source_0.set_bandwidth(0, 0)
self.rational_resampler_xxx_1 = filter.rational_resampler_fff(
interpolation=16000,
decimation=48000,
taps=None,
fractional_bw=None,
)
self.rational_resampler_xxx_0 = filter.rational_resampler_ccc(
interpolation=audio_rate*audio_interp,
decimation=samp_rate/xlate_decim,
taps=None,
fractional_bw=None,
)
self.low_pass_filter = filter.fir_filter_ccf(1, firdes.low_pass(
1, samp_rate/xlate_decim, 5000, 1500, firdes.WIN_HAMMING, 6.76))
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)), xlate_offset + xlate_offset_fine, samp_rate)
self.blocks_wavfile_sink_0 = blocks.wavfile_sink("/Users/ross/Desktop/GRC/testam.wav", 1, 16000, 16)
self.audio_sink_0 = audio.sink(48000, "", True)
self.analog_pwr_squelch_xx_0 = analog.pwr_squelch_ff(squelch*-1, 0.001, 0, True)
self.analog_am_demod_cf_0 = analog.am_demod_cf(
channel_rate=48000,
audio_decim=4,
audio_pass=5000,
audio_stop=5500,
)
self.analog_agc2_xx_0 = analog.agc2_cc(1e-1, 1e-5, 0.9, 10)
self.analog_agc2_xx_0.set_max_gain(10)
##################################################
# Connections
##################################################
self.connect((self.analog_agc2_xx_0, 0), (self.rational_resampler_xxx_0, 0))
self.connect((self.analog_am_demod_cf_0, 0), (self.analog_pwr_squelch_xx_0, 0))
self.connect((self.analog_pwr_squelch_xx_0, 0), (self.audio_sink_0, 0))
self.connect((self.analog_pwr_squelch_xx_0, 0), (self.rational_resampler_xxx_1, 0))
self.connect((self.freq_xlating_fir_filter_xxx_0, 0), (self.low_pass_filter, 0))
self.connect((self.freq_xlating_fir_filter_xxx_0, 0), (self.wxgui_fftsink2_0, 0))
self.connect((self.freq_xlating_fir_filter_xxx_0, 0), (self.wxgui_waterfallsink2_0, 0))
self.connect((self.low_pass_filter, 0), (self.analog_agc2_xx_0, 0))
self.connect((self.rational_resampler_xxx_0, 0), (self.analog_am_demod_cf_0, 0))
self.connect((self.rational_resampler_xxx_1, 0), (self.blocks_wavfile_sink_0, 0))
self.connect((self.rtlsdr_source_0, 0), (self.freq_xlating_fir_filter_xxx_0, 0))