def build_graph():
sample_rate = 8000
scale_factor = 32000
tb = gr.top_block()
src = audio.source(sample_rate, "plughw:0,0")
src_scale = gr.multiply_const_ff(scale_factor)
interp = blks2.rational_resampler_fff(8, 1)
f2s = gr.float_to_short ()
enc = vocoder.cvsd_encode_sb()
dec = vocoder.cvsd_decode_bs()
s2f = gr.short_to_float ()
decim = blks2.rational_resampler_fff(1, 8)
sink_scale = gr.multiply_const_ff(1.0/scale_factor)
sink = audio.sink(sample_rate, "plughw:0,0")
tb.connect(src, src_scale, interp, f2s, enc)
tb.connect(enc, dec, s2f, decim, sink_scale, sink)
if 0: # debug
tb.conect(src, gr.file_sink(gr.sizeof_float, "source.dat"))
tb.conect(src_scale, gr.file_sink(gr.sizeof_float, "src_scale.dat"))
tb.conect(interp, gr.file_sink(gr.sizeof_float, "interp.dat"))
tb.conect(f2s, gr.file_sink(gr.sizeof_short, "f2s.dat"))
tb.conect(enc, gr.file_sink(gr.sizeof_char, "enc.dat"))
tb.conect(dec, gr.file_sink(gr.sizeof_short, "dec.dat"))
tb.conect(s2f, gr.file_sink(gr.sizeof_float, "s2f.dat"))
tb.conect(decim, gr.file_sink(gr.sizeof_float, "decim.dat"))
tb.conect(sink_scale, gr.file_sink(gr.sizeof_float, "sink_scale.dat"))
return tb
def build_graph():
sample_rate = 8000
scale_factor = 32000
tb = gr.top_block()
src = audio.source(sample_rate, "plughw:0,0")
src_scale = gr.multiply_const_ff(scale_factor)
interp = blks2.rational_resampler_fff(8, 1)
f2s = gr.float_to_short()
enc = cvsd_vocoder.encode_sb()
dec = cvsd_vocoder.decode_bs()
s2f = gr.short_to_float()
decim = blks2.rational_resampler_fff(1, 8)
sink_scale = gr.multiply_const_ff(1.0 / scale_factor)
sink = audio.sink(sample_rate, "plughw:0,0")
tb.connect(src, src_scale, interp, f2s, enc)
tb.connect(enc, dec, s2f, decim, sink_scale, sink)
if 0: # debug
tb.conect(src, gr.file_sink(gr.sizeof_float, "source.dat"))
tb.conect(src_scale, gr.file_sink(gr.sizeof_float, "src_scale.dat"))
tb.conect(interp, gr.file_sink(gr.sizeof_float, "interp.dat"))
tb.conect(f2s, gr.file_sink(gr.sizeof_short, "f2s.dat"))
tb.conect(enc, gr.file_sink(gr.sizeof_char, "enc.dat"))
tb.conect(dec, gr.file_sink(gr.sizeof_short, "dec.dat"))
tb.conect(s2f, gr.file_sink(gr.sizeof_float, "s2f.dat"))
tb.conect(decim, gr.file_sink(gr.sizeof_float, "decim.dat"))
tb.conect(sink_scale, gr.file_sink(gr.sizeof_float, "sink_scale.dat"))
return tb
def xInit(self, signals, noises, sinks):
# ------------------------------------------------------------------------
self.sources = {}
self.mutes = {}
self.amps = {}
#sources
for signal in signals:
self.sources[signal] = gr.sig_source_f(
self.samprate, gr.GR_SIN_WAVE, 440, 0.25, 0)
self.mutes[signal] = gr.mute_ff(True)
self.amps[signal] = gr.multiply_const_ff(0.25)
for noise in noises:
self.sources[noise] = analog.noise_source_f(
analog.GR_LAPLACIAN, 1, 0)
self.mutes[noise] = gr.mute_ff(True)
self.amps[noise] = gr.multiply_const_ff(0.25)
#mixer
if len(self.sources) > 1:
self.adder = self.add = gr.add_vff(1)
else:
self.adder = gr.multiply_const_vff((1, ))
self.level = gr.multiply_const_ff(1)
#sinks
self.sinks = sinks
self.audiomute = gr.mute_ff(True)
self.audio = audio.sink(self.samprate, "", True)
self.udp = gr.null_sink(gr.sizeof_float)
self.rawfile = gr.null_sink(gr.sizeof_float)
self.wavefile = gr.null_sink(gr.sizeof_float)
def __init__(self):
gr.top_block.__init__(self)
parser = OptionParser(option_class=eng_option)
parser.add_option("-a", "--audio-input", type="string", default="")
parser.add_option("-A", "--audio-output", type="string", default="")
parser.add_option("-f", "--factor", type="eng_float", default=1)
parser.add_option("-i", "--do-interp", action="store_true", default=False, help="enable output interpolator")
parser.add_option("-s", "--sample-rate", type="int", default=48000, help="input sample rate")
parser.add_option("-S", "--stretch", type="int", default=0, help="flex amt")
parser.add_option("-y", "--symbol-rate", type="int", default=4800, help="input symbol rate")
parser.add_option("-v", "--verbose", action="store_true", default=False, help="dump demodulation data")
(options, args) = parser.parse_args()
sample_rate = options.sample_rate
symbol_rate = options.symbol_rate
IN = audio.source(sample_rate, options.audio_input)
audio_output_rate = 8000
if options.do_interp:
audio_output_rate = 48000
OUT = audio.sink(audio_output_rate, options.audio_output)
symbol_decim = 1
symbol_coeffs = gr.firdes.root_raised_cosine(1.0, # gain
sample_rate , # sampling rate
symbol_rate, # symbol rate
0.2, # width of trans. band
500) # filter type
SYMBOL_FILTER = gr.fir_filter_fff (symbol_decim, symbol_coeffs)
AMP = gr.multiply_const_ff(options.factor)
msgq = gr.msg_queue(2)
FSK4 = op25.fsk4_demod_ff(msgq, sample_rate, symbol_rate)
levels = levels = [-2.0, 0.0, 2.0, 4.0]
SLICER = repeater.fsk4_slicer_fb(levels)
framer_msgq = gr.msg_queue(2)
DECODE = repeater.p25_frame_assembler('', # udp hostname
0, # udp port no.
options.verbose, #debug
True, # do_imbe
True, # do_output
False, # do_msgq
framer_msgq)
IMBE = repeater.vocoder(False, # 0=Decode,True=Encode
options.verbose, # Verbose flag
options.stretch, # flex amount
"", # udp ip address
0, # udp port
False) # dump raw u vectors
CVT = gr.short_to_float()
if options.do_interp:
interp_taps = gr.firdes.low_pass(1.0, 48000, 4000, 4000 * 0.1, gr.firdes.WIN_HANN)
INTERP = gr.interp_fir_filter_fff(48000 // 8000, interp_taps)
AMP2 = gr.multiply_const_ff(1.0 / 32767.0)
self.connect(IN, AMP, SYMBOL_FILTER, FSK4, SLICER, DECODE, IMBE, CVT, AMP2)
if options.do_interp:
self.connect(AMP2, INTERP, OUT)
else:
self.connect(AMP2, OUT)
def build_graph():
tb = gr.top_block()
src = audio.source(8000)
src_scale = gr.multiply_const_ff(32767)
f2s = gr.float_to_short ()
enc = vocoder.g723_40_encode_sb()
dec = vocoder.g723_40_decode_bs()
s2f = gr.short_to_float ()
sink_scale = gr.multiply_const_ff(1.0/32767.)
sink = audio.sink(8000)
tb.connect(src, src_scale, f2s, enc, dec, s2f, sink_scale, sink)
return tb
def build_graph():
fg = gr.flow_graph()
src = audio.source(8000)
src_scale = gr.multiply_const_ff(32767)
f2s = gr.float_to_short ()
enc = gsm_full_rate.encode_sp()
dec = gsm_full_rate.decode_ps()
s2f = gr.short_to_float ()
sink_scale = gr.multiply_const_ff(1.0/32767.)
sink = audio.sink(8000)
fg.connect(src, src_scale, f2s, enc, dec, s2f, sink_scale, sink)
return fg
def build_graph():
tb = gr.top_block()
src = audio.source(8000)
src_scale = gr.multiply_const_ff(32767)
f2s = gr.float_to_short ()
enc = vocoder.ulaw_encode_sb()
dec = vocoder.ulaw_decode_bs()
s2f = gr.short_to_float ()
sink_scale = gr.multiply_const_ff(1.0/32767.)
sink = audio.sink(8000)
tb.connect(src, src_scale, f2s, enc, dec, s2f, sink_scale, sink)
return tb
def setup_radiometer_common(self,n): # The IIR integration filter for post-detection self.integrator = gr.single_pole_iir_filter_ff(1.0) self.integrator.set_taps (1.0/self.bw) if (self.use_notches == True): self.compute_notch_taps(self.notches) if (n == 2): self.notch_filt1 = gr.fft_filter_ccc(1, self.notch_taps) self.notch_filt2 = gr.fft_filter_ccc(1, self.notch_taps) else: self.notch_filt = gr.fft_filter_ccc(1, self.notch_taps) # Signal probe self.probe = gr.probe_signal_f() # # Continuum calibration stuff # x = self.calib_coeff/100.0 self.cal_mult = gr.multiply_const_ff(self.calib_coeff/100.0) self.cal_offs = gr.add_const_ff(self.calib_offset*(x*8000)) # # Mega decimator after IIR filter # if (self.switch_mode == False): self.keepn = gr.keep_one_in_n(gr.sizeof_float, self.bw) else: self.keepn = gr.keep_one_in_n(gr.sizeof_float, int(self.bw/2)) # # For the Dicke-switching scheme # #self.switch = gr.multiply_const_ff(1.0) # if (self.switch_mode == True): self.vector = gr.vector_sink_f() self.swkeep = gr.keep_one_in_n(gr.sizeof_float, int(self.bw/3)) self.mute = gr.keep_one_in_n(gr.sizeof_float, 1) self.cmute = gr.keep_one_in_n(gr.sizeof_float, int(1.0e9)) self.cintegrator = gr.single_pole_iir_filter_ff(1.0/(self.bw/2)) self.cprobe = gr.probe_signal_f() else: self.mute = gr.multiply_const_ff(1.0) self.avg_reference_value = 0.0 self.reference_level = gr.add_const_ff(0.0)
def ms_to_file(hb,block,filename,N=4096,delay=0,fft=False,scale=1):
streamsize = determine_streamsize(block)
vlen = streamsize/gr.sizeof_gr_complex
blks = [block]
if fft and vlen > 1:
gr_fft = fft_blocks.fft_vcc(vlen,True,[],True)
blks.append(gr_fft)
mag_sqrd = gr.complex_to_mag_squared(vlen)
blks.append(mag_sqrd)
if vlen > 1:
v2s = blocks.vector_to_stream(gr.sizeof_float,vlen)
blks.append(v2s)
if delay != 0:
delayline = delayline_ff(delay)
blks.append(delayline)
gr_scale = gr.multiply_const_ff(scale)
blks.append(gr_scale)
filter = gr.fir_filter_fff(1,[1.0/N]*N)
blks.append(filter)
for i in range(len(blks)-1):
hb.connect(blks[i],blks[i+1])
log_to_file(hb,filter,filename)
def ms_to_file(hb, block, filename, N=4096, delay=0, fft=False, scale=1):
streamsize = determine_streamsize(block)
vlen = streamsize / gr.sizeof_gr_complex
blks = [block]
if fft and vlen > 1:
gr_fft = fft_blocks.fft_vcc(vlen, True, [], True)
blks.append(gr_fft)
mag_sqrd = gr.complex_to_mag_squared(vlen)
blks.append(mag_sqrd)
if vlen > 1:
v2s = blocks.vector_to_stream(gr.sizeof_float, vlen)
blks.append(v2s)
if delay != 0:
delayline = delayline_ff(delay)
blks.append(delayline)
gr_scale = gr.multiply_const_ff(scale)
blks.append(gr_scale)
filter = gr.fir_filter_fff(1, [1.0 / N] * N)
blks.append(filter)
for i in range(len(blks) - 1):
hb.connect(blks[i], blks[i + 1])
log_to_file(hb, filter, filename)
def __init__(self, sps, channel_decim, channel_taps, options, usrp_rate,
channel_rate, lo_freq):
gr.hier_block2.__init__(self, "rx_channel_cqpsk",
gr.io_signature(1, 1, gr.sizeof_gr_complex),
gr.io_signature(1, 1, gr.sizeof_float))
chan = gr.freq_xlating_fir_filter_ccf(int(channel_decim), channel_taps,
lo_freq, usrp_rate)
agc = gr.feedforward_agc_cc(16, 1.0)
gain_omega = 0.125 * options.gain_mu * options.gain_mu
alpha = options.costas_alpha
beta = 0.125 * alpha * alpha
fmin = -0.025
fmax = 0.025
clock = repeater.gardner_costas_cc(sps, options.gain_mu, gain_omega,
alpha, beta, fmax, fmin)
# Perform Differential decoding on the constellation
diffdec = gr.diff_phasor_cc()
# take angle of the difference (in radians)
to_float = gr.complex_to_arg()
# convert from radians such that signal is in -3/-1/+1/+3
rescale = gr.multiply_const_ff((1 / (pi / 4)))
self.connect(self, chan, agc, clock, diffdec, to_float, rescale, self)
def __init__(self, fs, svn, alpha, fd_range, dump_bins=False):
gr.hier_block2.__init__(self,
"acquisition",
gr.io_signature(1,1, gr.sizeof_gr_complex),
gr.io_signature(3,3, gr.sizeof_float))
fft_size = int( 1e-3*fs)
doppler_range = self.get_doppler_range(fd_range)
agc = gr.agc_cc( 1.0/fs, 1.0, 1.0, 1.0)
s2v = gr.stream_to_vector(gr.sizeof_gr_complex, fft_size)
fft = gr.fft_vcc(fft_size, True, [])
argmax = gr.argmax_fs(fft_size)
max = gr.max_ff(fft_size)
self.connect( self, s2v, fft)
self.connect( (argmax, 0),
gr.short_to_float(),
(self, 0))
self.connect( (argmax,1),
gr.short_to_float(),
gr.add_const_ff(-fd_range),
gr.multiply_const_ff(1e3),
(self,1))
self.connect( max, (self, 2))
# Connect the individual channels to the input and the output.
self.correlators = [ single_channel_correlator( fs, fd, svn, alpha, dump_bins) for fd in doppler_range ]
for (correlator, i) in zip( self.correlators, range(len(self.correlators))):
self.connect( fft, correlator )
self.connect( correlator, (argmax, i) )
self.connect( correlator, (max, i) )
def __init__(self, length, debug=False):
"""
Hierarchical block to detect Null symbols
@param length length of the Null symbol (in samples)
@param debug whether to write signals out to files
"""
gr.hier_block2.__init__(self, "detect_null",
gr.io_signature(1, 1, gr.sizeof_gr_complex), # input signature
gr.io_signature(1, 1, gr.sizeof_char)) # output signature
# get the magnitude squared
self.ns_c2magsquared = gr.complex_to_mag_squared()
self.ns_moving_sum = dabp.moving_sum_ff(length)
self.ns_invert = gr.multiply_const_ff(-1)
# peak detector on the inverted, summed up signal -> we get the nulls (i.e. the position of the start of a frame)
self.ns_peak_detect = gr.peak_detector_fb(0.6,0.7,10,0.0001) # mostly found by try and error -> remember that the values are negative!
# connect it all
self.connect(self, self.ns_c2magsquared, self.ns_moving_sum, self.ns_invert, self.ns_peak_detect, self)
if debug:
self.connect(self.ns_invert, gr.file_sink(gr.sizeof_float, "debug/ofdm_sync_dabp_ns_filter_inv_f.dat"))
self.connect(self.ns_peak_detect,gr.file_sink(gr.sizeof_char, "debug/ofdm_sync_dabp_peak_detect_b.dat"))
def test_031_multiple_internal_inputs(self):
tb = gr.top_block()
src = gr.vector_source_f([1.0])
hb = gr.hier_block2("hb", gr.io_signature(1, 1, gr.sizeof_float), gr.io_signature(1, 1, gr.sizeof_float))
m1 = gr.multiply_const_ff(1.0)
m2 = gr.multiply_const_ff(2.0)
add = gr.add_ff()
hb.connect(hb, m1) # m1 is connected to hb external input #0
hb.connect(hb, m2) # m2 is also connected to hb external input #0
hb.connect(m1, (add, 0))
hb.connect(m2, (add, 1))
hb.connect(add, hb) # add is connected to hb external output #0
dst = gr.vector_sink_f()
tb.connect(src, hb, dst)
tb.run()
self.assertEquals(dst.data(), (3.0,))
def test_001_enc(self):
length = 2048 # DANGER: this fails for > 2048 for some reason
data = [random.randint(0, 255) for i in range(length)]
# last K-1 bits are padding, meaning last byte is lost
data[-1] = 0
data = tuple(data)
src = gr.vector_source_b(data)
enc = raw.conv_enc()
tofloat = gr.uchar_to_float()
offset = gr.multiply_const_ff(255.0)
touchar = gr.float_to_uchar()
dec = raw.conv_dec(length * 8)
dst = gr.vector_sink_b()
self.tb.connect(src, enc, tofloat, offset, touchar, dec, dst)
self.tb.run()
# self.assertEqual (data, dst.data())
nerrors = 0
i = 0
for (a, b) in itertools.izip(data, dst.data()):
nerr = bitCount(a ^ b)
if nerr:
print "%g " % (i / 2048.0), nerr
nerrors += nerr
i += 1
print "Number or Errors %d BER %g" % (nerrors, (nerrors * 1.0 / (length * 8)))
self.assertEqual(nerrors, 0)
def __init__(self, options, queue):
gr.top_block.__init__(self, "mhp")
self.audio_amps = []
self.converters = []
self.vocoders = []
self.output_files = []
input_audio_rate = 8000
self.audio_input = audio.source(input_audio_rate, options.audio_input)
for i in range(options.nchannels):
udp_port = options.udp_port + i
if options.output_files:
t = gr.file_sink(gr.sizeof_char, "baseband-%d.dat" % i)
self.output_files.append(t)
udp_port = 0
t = gr.multiply_const_ff(32767 * options.audio_gain)
self.audio_amps.append(t)
t = gr.float_to_short()
self.converters.append(t)
t = repeater.vocoder(
True, # 0=Decode,True=Encode
options.verbose, # Verbose flag
options.stretch, # flex amount
options.udp_addr, # udp ip address
udp_port, # udp port or zero
False) # dump raw u vectors
self.vocoders.append(t)
for i in range(options.nchannels):
self.connect((self.audio_input, i), self.audio_amps[i],
self.converters[i], self.vocoders[i])
if options.output_files:
self.connect(self.vocoders[i], self.output_files[i])
def __init__(self, uhd_address, options):
gr.top_block.__init__(self)
self.uhd_addr = uhd_address
self.freq = options.freq
self.samp_rate = options.samp_rate
self.gain = options.gain
self.threshold = options.threshold
self.trigger = options.trigger
self.uhd_src = uhd.single_usrp_source(
device_addr=self.uhd_addr,
io_type=uhd.io_type_t.COMPLEX_FLOAT32,
num_channels=1,
)
self.uhd_src.set_samp_rate(self.samp_rate)
self.uhd_src.set_center_freq(self.freq, 0)
self.uhd_src.set_gain(self.gain, 0)
taps = firdes.low_pass_2(1, 1, 0.4, 0.1, 60)
self.chanfilt = gr.fir_filter_ccc(10, taps)
self.tagger = gr.burst_tagger(gr.sizeof_gr_complex)
# Dummy signaler to collect a burst on known periods
data = 1000*[0,] + 1000*[1,]
self.signal = gr.vector_source_s(data, True)
# Energy detector to get signal burst
## use squelch to detect energy
self.det = gr.simple_squelch_cc(self.threshold, 0.01)
## convert to mag squared (float)
self.c2m = gr.complex_to_mag_squared()
## average to debounce
self.avg = gr.single_pole_iir_filter_ff(0.01)
## rescale signal for conversion to short
self.scale = gr.multiply_const_ff(2**16)
## signal input uses shorts
self.f2s = gr.float_to_short()
# Use file sink burst tagger to capture bursts
self.fsnk = gr.tagged_file_sink(gr.sizeof_gr_complex, self.samp_rate)
##################################################
# Connections
##################################################
self.connect((self.uhd_src, 0), (self.tagger, 0))
self.connect((self.tagger, 0), (self.fsnk, 0))
if self.trigger:
# Connect a dummy signaler to the burst tagger
self.connect((self.signal, 0), (self.tagger, 1))
else:
# Connect an energy detector signaler to the burst tagger
self.connect(self.uhd_src, self.det)
self.connect(self.det, self.c2m, self.avg, self.scale, self.f2s)
self.connect(self.f2s, (self.tagger, 1))
def __init__(self, fft_length):
gr.hier_block2.__init__(self, "foe",
gr.io_signature2(2,2,gr.sizeof_gr_complex,gr.sizeof_char),
gr.io_signature(1,1,gr.sizeof_float))
self.input = (self,0)
self.time_sync = (self,1)
# P(d)
self.nominator = schmidl_nominator(fft_length)
# sample nominator
sampler = vector_sampler(gr.sizeof_gr_complex,1)
self.connect(self.input, self.nominator, (sampler,0))
self.connect(self.time_sync, (sampler,1))
# calculate epsilon from P(d), epsilon is normalized fractional frequency offset
angle = complex_to_arg()
self.epsilon = gr.multiply_const_ff(1.0/math.pi)
self.connect(sampler, angle, self.epsilon, self)
try:
gr.hier_block.update_var_names(self, "foe", vars())
gr.hier_block.update_var_names(self, "foe", vars(self))
except:
pass
def __init__(self, vlen):
gr.hier_block2.__init__(self, "coarse_frequency_offset_estimation",
gr.io_signature2(2,2,gr.sizeof_gr_complex,gr.sizeof_char),
gr.io_signature (1,1,gr.sizeof_float))
## Preamble Extraction
sampler = vector_sampler(gr.sizeof_gr_complex,vlen)
self.connect(self,sampler)
self.connect((self,1),(sampler,1))
## Split block into two parts
splitter = gr.vector_to_streams(gr.sizeof_gr_complex*vlen/2,2)
self.connect(sampler,splitter)
## Multiply 2nd sub-part with conjugate of 1st sub-part
conj_mult = gr.multiply_conjugate_cc(vlen/2)
self.connect((splitter,1),(conj_mult,0))
self.connect((splitter,0),(conj_mult,1))
## Sum of Products
psum = vector_sum_vcc(vlen/2)
self.connect((conj_mult,0),psum)
## Complex to Angle
angle = complex_to_arg()
self.connect(psum,angle)
## Normalize
norm = gr.multiply_const_ff(1.0/math.pi)
self.connect(angle,norm)
## Setup Output Connections
self.connect(norm,self)
def __init__(self, length, debug=False): """ Hierarchical block to detect Null symbols @param length length of the Null symbol (in samples) @param debug whether to write signals out to files """ gr.hier_block2.__init__(self,"detect_null", gr.io_signature(1, 1, gr.sizeof_gr_complex), # input signature gr.io_signature(1, 1, gr.sizeof_char)) # output signature # get the magnitude squared self.ns_c2magsquared = gr.complex_to_mag_squared() # this wastes cpu cycles: # ns_detect_taps = [1]*length # self.ns_moving_sum = gr.fir_filter_fff(1,ns_detect_taps) # this isn't better: #self.ns_filter = gr.iir_filter_ffd([1]+[0]*(length-1)+[-1],[0,1]) # this does the same again, but is actually faster (outsourced to an independent block ..): self.ns_moving_sum = dab_swig.moving_sum_ff(length) self.ns_invert = gr.multiply_const_ff(-1) # peak detector on the inverted, summed up signal -> we get the nulls (i.e. the position of the start of a frame) self.ns_peak_detect = gr.peak_detector_fb(0.6,0.7,10,0.0001) # mostly found by try and error -> remember that the values are negative! # connect it all self.connect(self, self.ns_c2magsquared, self.ns_moving_sum, self.ns_invert, self.ns_peak_detect, self) if debug: self.connect(self.ns_invert, gr.file_sink(gr.sizeof_float, "debug/ofdm_sync_dab_ns_filter_inv_f.dat")) self.connect(self.ns_peak_detect,gr.file_sink(gr.sizeof_char, "debug/ofdm_sync_dab_peak_detect_b.dat"))
def __init__(self, fft_length):
gr.hier_block2.__init__(
self, "foe",
gr.io_signature2(2, 2, gr.sizeof_gr_complex, gr.sizeof_char),
gr.io_signature(1, 1, gr.sizeof_float))
self.input = (self, 0)
self.time_sync = (self, 1)
# P(d)
self.nominator = schmidl_nominator(fft_length)
# sample nominator
sampler = vector_sampler(gr.sizeof_gr_complex, 1)
self.connect(self.input, self.nominator, (sampler, 0))
self.connect(self.time_sync, (sampler, 1))
# calculate epsilon from P(d), epsilon is normalized fractional frequency offset
angle = complex_to_arg()
self.epsilon = gr.multiply_const_ff(1.0 / math.pi)
self.connect(sampler, angle, self.epsilon, self)
try:
gr.hier_block.update_var_names(self, "foe", vars())
gr.hier_block.update_var_names(self, "foe", vars(self))
except:
pass
def punctest(self, nc, np):
length = 2046 # should be divisible by nc
data = [random.randint(0, 255) for i in range(length)]
# last K-1 bits are padding, meaning last byte is lost
data[-1] = 0
data = tuple(data)
src = gr.vector_source_b(data)
enc = raw.conv_enc()
dec = raw.conv_dec(length * 8)
punc = raw.conv_punc(nc, np)
depunc = raw.conv_punc(np, nc, 128)
tofloat = gr.uchar_to_float()
offset = gr.multiply_const_ff(255.0)
touchar = gr.float_to_uchar()
dst = gr.vector_sink_b()
rx = gr.vector_sink_b()
self.tb.connect(src, enc, punc, tofloat, offset, touchar, depunc, dec, dst)
self.tb.connect(punc, rx)
self.tb.run()
rxlen = len(rx.data())
self.assertEqual(rxlen, (length * 8 * 2 * np) / nc)
self.assertEqual(data, dst.data())
def __init__(self, vlen):
gr.hier_block2.__init__(
self, "coarse_frequency_offset_estimation",
gr.io_signature2(2, 2, gr.sizeof_gr_complex, gr.sizeof_char),
gr.io_signature(1, 1, gr.sizeof_float))
## Preamble Extraction
sampler = vector_sampler(gr.sizeof_gr_complex, vlen)
self.connect(self, sampler)
self.connect((self, 1), (sampler, 1))
## Split block into two parts
splitter = gr.vector_to_streams(gr.sizeof_gr_complex * vlen / 2, 2)
self.connect(sampler, splitter)
## Multiply 2nd sub-part with conjugate of 1st sub-part
conj_mult = gr.multiply_conjugate_cc(vlen / 2)
self.connect((splitter, 1), (conj_mult, 0))
self.connect((splitter, 0), (conj_mult, 1))
## Sum of Products
psum = vector_sum_vcc(vlen / 2)
self.connect((conj_mult, 0), psum)
## Complex to Angle
angle = complex_to_arg()
self.connect(psum, angle)
## Normalize
norm = gr.multiply_const_ff(1.0 / math.pi)
self.connect(angle, norm)
## Setup Output Connections
self.connect(norm, self)
def __init__(self, sps, channel_decim, channel_taps, options, usrp_rate, channel_rate, lo_freq):
gr.hier_block2.__init__(self, "rx_channel_cqpsk",
gr.io_signature(1, 1, gr.sizeof_gr_complex),
gr.io_signature(1, 1, gr.sizeof_float))
chan = gr.freq_xlating_fir_filter_ccf(int(channel_decim), channel_taps, lo_freq, usrp_rate)
agc = gr.feedforward_agc_cc(16, 1.0)
gain_omega = 0.125 * options.gain_mu * options.gain_mu
alpha = options.costas_alpha
beta = 0.125 * alpha * alpha
fmin = -0.025
fmax = 0.025
clock = repeater.gardner_costas_cc(sps, options.gain_mu, gain_omega, alpha, beta, fmax, fmin)
# Perform Differential decoding on the constellation
diffdec = gr.diff_phasor_cc()
# take angle of the difference (in radians)
to_float = gr.complex_to_arg()
# convert from radians such that signal is in -3/-1/+1/+3
rescale = gr.multiply_const_ff( (1 / (pi / 4)) )
self.connect (self, chan, agc, clock, diffdec, to_float, rescale, self)
def test_00(self):
expected_result = (
0x00, 0x11, 0x22, 0x33,
0x44, 0x55, 0x66, 0x77,
0x88, 0x99, 0xaa, 0xbb,
0xcc, 0xdd, 0xee, 0xff)
# Filter taps to expand the data to oversample by 8
# Just using a RRC for some basic filter shape
taps = gr.firdes.root_raised_cosine(8, 8, 1.0, 0.5, 21)
src = gr.vector_source_b(expected_result)
frame = digital.simple_framer(4)
unpack = gr.packed_to_unpacked_bb(1, gr.GR_MSB_FIRST)
expand = gr.interp_fir_filter_fff(8, taps)
b2f = gr.char_to_float()
mult2 = gr.multiply_const_ff(2)
sub1 = gr.add_const_ff(-1)
op = digital.simple_correlator(4)
dst = gr.vector_sink_b()
self.tb.connect(src, frame, unpack, b2f, mult2, sub1, expand)
self.tb.connect(expand, op, dst)
self.tb.run()
result_data = dst.data()
self.assertEqual(expected_result, result_data)
def test_001_enc(self):
length = 2048 # DANGER: this fails for > 2048 for some reason
data = [random.randint(0, 255) for i in range(length)]
# last K-1 bits are padding, meaning last byte is lost
data[-1] = 0
data = tuple(data)
src = gr.vector_source_b(data)
enc = raw.conv_enc()
tofloat = gr.uchar_to_float()
offset = gr.multiply_const_ff(255.0)
touchar = gr.float_to_uchar()
dec = raw.conv_dec(length * 8)
dst = gr.vector_sink_b()
self.tb.connect(src, enc, tofloat, offset, touchar, dec, dst)
self.tb.run()
#self.assertEqual (data, dst.data())
nerrors = 0
i = 0
for (a, b) in itertools.izip(data, dst.data()):
nerr = bitCount(a ^ b)
if nerr:
print "%g " % (i / 2048.), nerr
nerrors += nerr
i += 1
print "Number or Errors %d BER %g" % (nerrors,
(nerrors * 1.0 / (length * 8)))
self.assertEqual(nerrors, 0)
def __init__(self, uhd_address, options):
gr.top_block.__init__(self)
self.uhd_addr = uhd_address
self.freq = options.freq
self.samp_rate = options.samp_rate
self.gain = options.gain
self.threshold = options.threshold
self.trigger = options.trigger
self.uhd_src = uhd.single_usrp_source(
device_addr=self.uhd_addr, stream_args=uhd.stream_args('fc32'))
self.uhd_src.set_samp_rate(self.samp_rate)
self.uhd_src.set_center_freq(self.freq, 0)
self.uhd_src.set_gain(self.gain, 0)
taps = firdes.low_pass_2(1, 1, 0.4, 0.1, 60)
self.chanfilt = gr.fir_filter_ccc(10, taps)
self.tagger = gr.burst_tagger(gr.sizeof_gr_complex)
# Dummy signaler to collect a burst on known periods
data = 1000 * [
0,
] + 1000 * [
1,
]
self.signal = gr.vector_source_s(data, True)
# Energy detector to get signal burst
## use squelch to detect energy
self.det = gr.simple_squelch_cc(self.threshold, 0.01)
## convert to mag squared (float)
self.c2m = gr.complex_to_mag_squared()
## average to debounce
self.avg = gr.single_pole_iir_filter_ff(0.01)
## rescale signal for conversion to short
self.scale = gr.multiply_const_ff(2**16)
## signal input uses shorts
self.f2s = gr.float_to_short()
# Use file sink burst tagger to capture bursts
self.fsnk = gr.tagged_file_sink(gr.sizeof_gr_complex, self.samp_rate)
##################################################
# Connections
##################################################
self.connect((self.uhd_src, 0), (self.tagger, 0))
self.connect((self.tagger, 0), (self.fsnk, 0))
if self.trigger:
# Connect a dummy signaler to the burst tagger
self.connect((self.signal, 0), (self.tagger, 1))
else:
# Connect an energy detector signaler to the burst tagger
self.connect(self.uhd_src, self.det)
self.connect(self.det, self.c2m, self.avg, self.scale, self.f2s)
self.connect(self.f2s, (self.tagger, 1))
def punctest(self, nc, np):
length = 2046 # should be divisible by nc
data = [random.randint(0, 255) for i in range(length)]
# last K-1 bits are padding, meaning last byte is lost
data[-1] = 0
data = tuple(data)
src = gr.vector_source_b(data)
enc = raw.conv_enc()
dec = raw.conv_dec(length * 8)
punc = raw.conv_punc(nc, np)
depunc = raw.conv_punc(np, nc, 128)
tofloat = gr.uchar_to_float()
offset = gr.multiply_const_ff(255.0)
touchar = gr.float_to_uchar()
dst = gr.vector_sink_b()
rx = gr.vector_sink_b()
self.tb.connect(src, enc, punc, tofloat, offset, touchar, depunc, dec,
dst)
self.tb.connect(punc, rx)
self.tb.run()
rxlen = len(rx.data())
self.assertEqual(rxlen, (length * 8 * 2 * np) / nc)
self.assertEqual(data, dst.data())
def __init__(self, options, queue):
gr.top_block.__init__(self, "mhp")
self.audio_amps = []
self.converters = []
self.vocoders = []
self.output_files = []
input_audio_rate = 8000
self.audio_input = audio.source(input_audio_rate, options.audio_input)
for i in range (options.nchannels):
udp_port = options.udp_port + i
if options.output_files:
t = gr.file_sink(gr.sizeof_char, "baseband-%d.dat" % i)
self.output_files.append(t)
udp_port = 0
t = gr.multiply_const_ff(32767 * options.audio_gain)
self.audio_amps.append(t)
t = gr.float_to_short()
self.converters.append(t)
t = repeater.vocoder(True, # 0=Decode,True=Encode
options.verbose, # Verbose flag
options.stretch, # flex amount
options.udp_addr, # udp ip address
udp_port, # udp port or zero
False) # dump raw u vectors
self.vocoders.append(t)
for i in range (options.nchannels):
self.connect((self.audio_input, i), self.audio_amps[i], self.converters[i], self.vocoders[i])
if options.output_files:
self.connect(self.vocoders[i], self.output_files[i])
def __init__(self, fs, svn, alpha, fd_range, dump_bins=False):
gr.hier_block2.__init__(self, "acquisition",
gr.io_signature(1, 1, gr.sizeof_gr_complex),
gr.io_signature(3, 3, gr.sizeof_float))
fft_size = int(1e-3 * fs)
doppler_range = self.get_doppler_range(fd_range)
agc = gr.agc_cc(1.0 / fs, 1.0, 1.0, 1.0)
s2v = gr.stream_to_vector(gr.sizeof_gr_complex, fft_size)
fft = gr.fft_vcc(fft_size, True, [])
argmax = gr.argmax_fs(fft_size)
max = gr.max_ff(fft_size)
self.connect(self, s2v, fft)
self.connect((argmax, 0), gr.short_to_float(), (self, 0))
self.connect((argmax, 1), gr.short_to_float(),
gr.add_const_ff(-fd_range), gr.multiply_const_ff(1e3),
(self, 1))
self.connect(max, (self, 2))
# Connect the individual channels to the input and the output.
self.correlators = [
single_channel_correlator(fs, fd, svn, alpha, dump_bins)
for fd in doppler_range
]
for (correlator, i) in zip(self.correlators,
range(len(self.correlators))):
self.connect(fft, correlator)
self.connect(correlator, (argmax, i))
self.connect(correlator, (max, i))
def __init__( self, if_rate, af_rate ):
gr.hier_block2.__init__(self, "ssb_demod",
gr.io_signature(1,1,gr.sizeof_gr_complex),
gr.io_signature(1,1,gr.sizeof_float))
self.if_rate = int(if_rate)
self.af_rate = int(af_rate)
self.if_decim = int(if_rate / af_rate)
self.sideband = 1
self.xlate_taps = ([complex(v) for v in file('ssb_taps').readlines()])
self.audio_taps = gr.firdes.low_pass(
1.0,
self.af_rate,
3e3,
600,
gr.firdes.WIN_HAMMING )
self.xlate = gr.freq_xlating_fir_filter_ccc(
self.if_decim,
self.xlate_taps,
0,
self.if_rate )
self.split = gr.complex_to_float()
self.lpf = gr.fir_filter_fff(
1, self.audio_taps )
self.sum = gr.add_ff( )
self.am_sel = gr.multiply_const_ff( 0 )
self.sb_sel = gr.multiply_const_ff( 1 )
self.mixer = gr.add_ff()
self.am_det = gr.complex_to_mag()
self.connect(self, self.xlate)
self.connect(self.xlate, self.split)
self.connect((self.split, 0), (self.sum, 0))
self.connect((self.split, 1), (self.sum, 1))
self.connect(self.sum, self.sb_sel)
self.connect(self.xlate, self.am_det)
self.connect(self.sb_sel, (self.mixer, 0))
self.connect(self.am_det, self.am_sel)
self.connect(self.am_sel, (self.mixer, 1))
self.connect(self.mixer, self.lpf)
self.connect(self.lpf, self)
def __init__(self, options, queue):
gr.top_block.__init__(self, "mhp")
sample_rate = options.sample_rate
arity = 2
IN = gr.file_source(gr.sizeof_char, options.input_file, options.repeat)
B2C = gr.packed_to_unpacked_bb(arity, gr.GR_MSB_FIRST)
mod_map = [1.0, 3.0, -1.0, -3.0]
C2S = gr.chunks_to_symbols_bf(mod_map)
if options.reverse:
polarity = gr.multiply_const_ff(-1)
else:
polarity = gr.multiply_const_ff( 1)
symbol_rate = 4800
samples_per_symbol = sample_rate // symbol_rate
excess_bw = 0.1
ntaps = 11 * samples_per_symbol
rrc_taps = gr.firdes.root_raised_cosine(
samples_per_symbol, # gain (sps since we're interpolating by sps
samples_per_symbol, # sampling rate
1.0, # symbol rate
excess_bw, # excess bandwidth (roll-off factor)
ntaps)
rrc_filter = gr.interp_fir_filter_fff(samples_per_symbol, rrc_taps)
rrc_coeffs = [0, -0.003, -0.006, -0.009, -0.012, -0.014, -0.014, -0.013, -0.01, -0.006, 0, 0.007, 0.014, 0.02, 0.026, 0.029, 0.029, 0.027, 0.021, 0.012, 0, -0.013, -0.027, -0.039, -0.049, -0.054, -0.055, -0.049, -0.038, -0.021, 0, 0.024, 0.048, 0.071, 0.088, 0.098, 0.099, 0.09, 0.07, 0.039, 0, -0.045, -0.091, -0.134, -0.17, -0.193, -0.199, -0.184, -0.147, -0.085, 0, 0.105, 0.227, 0.36, 0.496, 0.629, 0.751, 0.854, 0.933, 0.983, 1, 0.983, 0.933, 0.854, 0.751, 0.629, 0.496, 0.36, 0.227, 0.105, 0, -0.085, -0.147, -0.184, -0.199, -0.193, -0.17, -0.134, -0.091, -0.045, 0, 0.039, 0.07, 0.09, 0.099, 0.098, 0.088, 0.071, 0.048, 0.024, 0, -0.021, -0.038, -0.049, -0.055, -0.054, -0.049, -0.039, -0.027, -0.013, 0, 0.012, 0.021, 0.027, 0.029, 0.029, 0.026, 0.02, 0.014, 0.007, 0, -0.006, -0.01, -0.013, -0.014, -0.014, -0.012, -0.009, -0.006, -0.003, 0]
# rrc_coeffs work slightly differently: each input sample
# (from mod_map above) at 4800 rate, then 9 zeros are inserted
# to bring to a 48000 rate, then this filter is applied:
# rrc_filter = gr.fir_filter_fff(1, rrc_coeffs)
# FIXME: how to insert the 9 zero samples using gr ?
# FM pre-emphasis filter
shaping_coeffs = [-0.018, 0.0347, 0.0164, -0.0064, -0.0344, -0.0522, -0.0398, 0.0099, 0.0798, 0.1311, 0.121, 0.0322, -0.113, -0.2499, -0.3007, -0.2137, -0.0043, 0.2825, 0.514, 0.604, 0.514, 0.2825, -0.0043, -0.2137, -0.3007, -0.2499, -0.113, 0.0322, 0.121, 0.1311, 0.0798, 0.0099, -0.0398, -0.0522, -0.0344, -0.0064, 0.0164, 0.0347, -0.018]
shaping_filter = gr.fir_filter_fff(1, shaping_coeffs)
OUT = audio.sink(sample_rate, options.audio_output)
amp = gr.multiply_const_ff(options.factor)
self.connect(IN, B2C, C2S, polarity, rrc_filter, shaping_filter, amp)
# output to both L and R channels
self.connect(amp, (OUT,0) )
self.connect(amp, (OUT,1) )
def __init__(self,k):
gr.hier_block2.__init__(self,"BER Estimator",
gr.io_signature(1,1,gr.sizeof_float),
gr.io_signature(1,1,gr.sizeof_float))
self.add = gr.add_const_vff((-1, ))
self.mult= gr.multiply_const_ff(-1/k)
self.connect(self,self.add, self.mult,self)
def __build_graph(self, source, capture_rate):
# tell the scope the source rate
self.spectrum.set_sample_rate(capture_rate)
# channel filter
self.channel_offset = 0.0
channel_decim = capture_rate // self.channel_rate
channel_rate = capture_rate // channel_decim
trans_width = 12.5e3 / 2
trans_centre = trans_width + (trans_width / 2)
# discriminator tap doesn't do freq. xlation, FM demodulation, etc.
if not self.baseband_input:
coeffs = gr.firdes.low_pass(1.0, capture_rate, trans_centre,
trans_width, gr.firdes.WIN_HANN)
self.channel_filter = gr.freq_xlating_fir_filter_ccf(
channel_decim, coeffs, 0.0, capture_rate)
self.set_channel_offset(0.0, 0, self.spectrum.win._units)
# power squelch
squelch_db = 0
self.squelch = gr.pwr_squelch_cc(squelch_db, 1e-3, 0, True)
self.set_squelch_threshold(squelch_db)
# FM demodulator
fm_demod_gain = channel_rate / (2.0 * pi * self.symbol_deviation)
fm_demod = gr.quadrature_demod_cf(fm_demod_gain)
# symbol filter
symbol_decim = 1
#symbol_coeffs = gr.firdes.root_raised_cosine(1.0, channel_rate, self.symbol_rate, 0.2, 500)
# boxcar coefficients for "integrate and dump" filter
samples_per_symbol = channel_rate // self.symbol_rate
symbol_coeffs = (1.0 / samples_per_symbol, ) * samples_per_symbol
self.symbol_filter = gr.fir_filter_fff(symbol_decim, symbol_coeffs)
# C4FM demodulator
autotuneq = gr.msg_queue(2)
demod_fsk4 = op25.fsk4_demod_ff(autotuneq, channel_rate,
self.symbol_rate)
# for now no audio output
sink = gr.null_sink(gr.sizeof_float)
# connect it all up
if self.baseband_input:
self.rescaler = gr.multiply_const_ff(1)
sinkx = gr.file_sink(gr.sizeof_float, "rx.dat")
self.__connect([[
source, self.rescaler, self.symbol_filter, demod_fsk4,
self.slicer, self.p25_decoder, sink
], [self.symbol_filter, self.signal_scope], [demod_fsk4, sinkx],
[demod_fsk4, self.symbol_scope]])
self.connect_data_scope(not self.datascope_raw_input)
else:
self.demod_watcher = demod_watcher(autotuneq,
self.adjust_channel_offset)
self.__connect([[
source, self.channel_filter, self.squelch, fm_demod,
self.symbol_filter, demod_fsk4, self.slicer, self.p25_decoder,
sink
], [source, self.spectrum],
[self.symbol_filter, self.signal_scope],
[demod_fsk4, self.symbol_scope]])
def __init__(self, rate, device):
gr.hier_block2.__init__(self, "output",
gr.io_signature(1, 1, gr.sizeof_float),
gr.io_signature(0, 0, 0))
self.vol = gr.multiply_const_ff(0.1)
self.out = audio.sink(int(rate), device)
self.connect(self, self.vol, self.out)
def __init__( self, rate, device ):
gr.hier_block2.__init__(self, "output",
gr.io_signature(1,1,gr.sizeof_float),
gr.io_signature(0,0,0))
self.vol = gr.multiply_const_ff( 0.1 )
self.out = audio.sink( int(rate), device )
self.connect( self, self.vol, self.out )
def __init__(self, k):
gr.hier_block2.__init__(self, "BER Estimator",
gr.io_signature(1, 1, gr.sizeof_float),
gr.io_signature(1, 1, gr.sizeof_float))
self.add = gr.add_const_vff((-1, ))
self.mult = gr.multiply_const_ff(-1 / k)
self.connect(self, self.add, self.mult, self)
def __init__(self, subdev_spec, audio_input):
gr.hier_block2.__init__(
self,
"transmit_path",
gr.io_signature(0, 0, 0), # Input signature
gr.io_signature(0, 0, 0)) # Output signature
self.u = usrp.sink_c()
dac_rate = self.u.dac_rate()
self.if_rate = 320e3 # 320 kS/s
self.usrp_interp = int(dac_rate // self.if_rate)
self.u.set_interp_rate(self.usrp_interp)
self.sw_interp = 10
self.audio_rate = self.if_rate // self.sw_interp # 32 kS/s
self.audio_gain = 10
self.normal_gain = 32000
self.audio = audio.source(int(self.audio_rate), audio_input)
self.audio_amp = gr.multiply_const_ff(self.audio_gain)
lpf = gr.firdes.low_pass(
1, # gain
self.audio_rate, # sampling rate
3800, # low pass cutoff freq
300, # width of trans. band
gr.firdes.WIN_HANN) # filter type
hpf = gr.firdes.high_pass(
1, # gain
self.audio_rate, # sampling rate
325, # low pass cutoff freq
50, # width of trans. band
gr.firdes.WIN_HANN) # filter type
audio_taps = convolve(array(lpf), array(hpf))
self.audio_filt = gr.fir_filter_fff(1, audio_taps)
self.pl = blks2.ctcss_gen_f(self.audio_rate, 123.0)
self.add_pl = gr.add_ff()
self.connect(self.pl, (self.add_pl, 1))
self.fmtx = blks2.nbfm_tx(self.audio_rate, self.if_rate)
self.amp = gr.multiply_const_cc(self.normal_gain)
# determine the daughterboard subdevice we're using
if subdev_spec is None:
subdev_spec = usrp.pick_tx_subdevice(self.u)
self.u.set_mux(usrp.determine_tx_mux_value(self.u, subdev_spec))
self.subdev = usrp.selected_subdev(self.u, subdev_spec)
print "TX using", self.subdev.name()
self.connect(self.audio, self.audio_amp, self.audio_filt,
(self.add_pl, 0), self.fmtx, self.amp, self.u)
self.set_gain(self.subdev.gain_range()[1]) # set max Tx gain
def __init__( self, fg, if_rate, af_rate ):
self.if_rate = if_rate
self.af_rate = af_rate
self.if_decim = if_rate / af_rate
self.sideband = 1
self.xlate_taps = ([complex(v) for v in file('ssb_taps').readlines()])
self.audio_taps = gr.firdes.low_pass(
1.0,
self.af_rate,
3e3,
600,
gr.firdes.WIN_HAMMING )
self.xlate = gr.freq_xlating_fir_filter_ccc(
self.if_decim,
self.xlate_taps,
0,
self.if_rate )
self.split = gr.complex_to_float()
self.lpf = gr.fir_filter_fff(
1, self.audio_taps )
self.sum = gr.add_ff( )
self.am_sel = gr.multiply_const_ff( 0 )
self.sb_sel = gr.multiply_const_ff( 1 )
self.mixer = gr.add_ff()
self.am_det = gr.complex_to_mag()
fg.connect( self.xlate, self.split )
fg.connect( ( self.split,0 ), ( self.sum,0 ) )
fg.connect( ( self.split,1 ), ( self.sum,1 ) )
fg.connect( self.sum, self.sb_sel )
fg.connect( self.xlate, self.am_det )
fg.connect( self.sb_sel, ( self.mixer, 0 ) )
fg.connect( self.am_det, self.am_sel )
fg.connect( self.am_sel, ( self.mixer, 1 ) )
fg.connect( self.mixer, self.lpf )
gr.hier_block.__init__( self, fg, self.xlate, self.lpf )
def __init__(self, subdev_spec, audio_input):
gr.hier_block2.__init__(
self, "transmit_path", gr.io_signature(0, 0, 0), gr.io_signature(0, 0, 0) # Input signature
) # Output signature
self.u = usrp.sink_c()
dac_rate = self.u.dac_rate()
self.if_rate = 320e3 # 320 kS/s
self.usrp_interp = int(dac_rate // self.if_rate)
self.u.set_interp_rate(self.usrp_interp)
self.sw_interp = 10
self.audio_rate = self.if_rate // self.sw_interp # 32 kS/s
self.audio_gain = 10
self.normal_gain = 32000
self.audio = audio.source(int(self.audio_rate), audio_input)
self.audio_amp = gr.multiply_const_ff(self.audio_gain)
lpf = gr.firdes.low_pass(
1, # gain
self.audio_rate, # sampling rate
3800, # low pass cutoff freq
300, # width of trans. band
gr.firdes.WIN_HANN,
) # filter type
hpf = gr.firdes.high_pass(
1, # gain
self.audio_rate, # sampling rate
325, # low pass cutoff freq
50, # width of trans. band
gr.firdes.WIN_HANN,
) # filter type
audio_taps = convolve(array(lpf), array(hpf))
self.audio_filt = gr.fir_filter_fff(1, audio_taps)
self.pl = blks2.ctcss_gen_f(self.audio_rate, 123.0)
self.add_pl = gr.add_ff()
self.connect(self.pl, (self.add_pl, 1))
self.fmtx = blks2.nbfm_tx(self.audio_rate, self.if_rate)
self.amp = gr.multiply_const_cc(self.normal_gain)
# determine the daughterboard subdevice we're using
if subdev_spec is None:
subdev_spec = usrp.pick_tx_subdevice(self.u)
self.u.set_mux(usrp.determine_tx_mux_value(self.u, subdev_spec))
self.subdev = usrp.selected_subdev(self.u, subdev_spec)
print "TX using", self.subdev.name()
self.connect(self.audio, self.audio_amp, self.audio_filt, (self.add_pl, 0), self.fmtx, self.amp, self.u)
self.set_gain(self.subdev.gain_range()[1]) # set max Tx gain
def __init__(self):
gr.flow_graph.__init__(self)
parser = OptionParser(option_class=eng_option)
parser.add_option(
"-T",
"--tx-subdev-spec",
type="subdev",
default=None,
help=
"select USRP Tx side A or B (default=first one with a daughterboard)"
)
parser.add_option("-c",
"--cordic-freq",
type="eng_float",
default=434845200,
help="set Tx cordic frequency to FREQ",
metavar="FREQ")
(options, args) = parser.parse_args()
print "cordic_freq = %s" % (eng_notation.num_to_str(
options.cordic_freq))
self.normal_gain = 8000
self.u = usrp.sink_s()
dac_rate = self.u.dac_rate()
self._freq = 1000
self._spb = 256
self._interp = int(128e6 / self._spb / self._freq)
self.fs = 128e6 / self._interp
print "Interpolation:", self._interp
self.u.set_interp_rate(self._interp)
# determine the daughterboard subdevice we're using
if options.tx_subdev_spec is None:
options.tx_subdev_spec = usrp.pick_tx_subdevice(self.u)
self.u.set_mux(
usrp.determine_tx_mux_value(self.u, options.tx_subdev_spec))
self.subdev = usrp.selected_subdev(self.u, options.tx_subdev_spec)
print "Using TX d'board %s" % (self.subdev.side_and_name(), )
self.u.tune(self.subdev._which, self.subdev, options.cordic_freq)
self.sin = gr.sig_source_f(self.fs, gr.GR_SIN_WAVE, self._freq, 1, 0)
self.gain = gr.multiply_const_ff(self.normal_gain)
self.ftos = gr.float_to_short()
self.filesink = gr.file_sink(gr.sizeof_float, 'sin.dat')
self.connect(self.sin, self.gain)
self.connect(self.gain, self.ftos, self.u)
#self.connect(self.gain, self.filesink)
self.set_gain(self.subdev.gain_range()[1]) # set max Tx gain
self.set_auto_tr(True) # enable Auto Transmit/Receive switching
def __init__(self):
gr.hier_block2.__init__(self,"BER Estimator",
gr.io_signature(1,1,gr.sizeof_float),
gr.io_signature(1,1,gr.sizeof_float))
#TODO Implement a polynomial block in C++ and approximate with polynomials
#of arbitrary order
self.add = gr.add_const_vff((-1, ))
self.square = gr.multiply_ff()
self.mult_lin = gr.multiply_const_ff(-0.20473967)
self.mult_sq = gr.multiply_const_ff(1.5228658)
self.sum = gr.add_ff()
self.connect(self,self.add)
self.connect(self.add,(self.square,0))
self.connect(self.add,(self.square,1))
self.connect(self.square,self.mult_sq,(self.sum,0))
self.connect(self.add,self.mult_lin,(self.sum,1))
self.connect(self.sum,self)
def __init__(self, fg):
self.split = gr.multiply_const_ff(1)
self.sqr = gr.multiply_ff()
self.int0 = gr.iir_filter_ffd([.004, 0], [0, .999])
self.offs = gr.add_const_ff(-30)
self.gain = gr.multiply_const_ff(70)
self.log = gr.nlog10_ff(10, 1)
self.agc = gr.divide_ff()
fg.connect(self.split, (self.agc, 0))
fg.connect(self.split, (self.sqr, 0))
fg.connect(self.split, (self.sqr, 1))
fg.connect(self.sqr, self.int0)
fg.connect(self.int0, self.log)
fg.connect(self.log, self.offs)
fg.connect(self.offs, self.gain)
fg.connect(self.gain, (self.agc, 1))
gr.hier_block.__init__(self, fg, self.split, self.agc)
def __init__(self):
gr.hier_block2.__init__(self, "BER Estimator",
gr.io_signature(1, 1, gr.sizeof_float),
gr.io_signature(1, 1, gr.sizeof_float))
#TODO Implement a polynomial block in C++ and approximate with polynomials
#of arbitrary order
self.add = gr.add_const_vff((-1, ))
self.square = gr.multiply_ff()
self.mult_lin = gr.multiply_const_ff(-0.20473967)
self.mult_sq = gr.multiply_const_ff(1.5228658)
self.sum = gr.add_ff()
self.connect(self, self.add)
self.connect(self.add, (self.square, 0))
self.connect(self.add, (self.square, 1))
self.connect(self.square, self.mult_sq, (self.sum, 0))
self.connect(self.add, self.mult_lin, (self.sum, 1))
self.connect(self.sum, self)
def test_031_multiple_internal_inputs(self):
tb = gr.top_block()
src = gr.vector_source_f([
1.0,
])
hb = gr.hier_block2("hb", gr.io_signature(1, 1, gr.sizeof_float),
gr.io_signature(1, 1, gr.sizeof_float))
m1 = gr.multiply_const_ff(1.0)
m2 = gr.multiply_const_ff(2.0)
add = gr.add_ff()
hb.connect(hb, m1) # m1 is connected to hb external input #0
hb.connect(hb, m2) # m2 is also connected to hb external input #0
hb.connect(m1, (add, 0))
hb.connect(m2, (add, 1))
hb.connect(add, hb) # add is connected to hb external output #0
dst = gr.vector_sink_f()
tb.connect(src, hb, dst)
tb.run()
self.assertEquals(dst.data(), (3.0, ))
def __init__(self, fg):
self.split = gr.multiply_const_ff(1)
self.sqr = gr.multiply_ff()
self.int0 = gr.iir_filter_ffd([0.004, 0], [0, 0.999])
self.offs = gr.add_const_ff(-30)
self.gain = gr.multiply_const_ff(70)
self.log = gr.nlog10_ff(10, 1)
self.agc = gr.divide_ff()
fg.connect(self.split, (self.agc, 0))
fg.connect(self.split, (self.sqr, 0))
fg.connect(self.split, (self.sqr, 1))
fg.connect(self.sqr, self.int0)
fg.connect(self.int0, self.log)
fg.connect(self.log, self.offs)
fg.connect(self.offs, self.gain)
fg.connect(self.gain, (self.agc, 1))
gr.hier_block.__init__(self, fg, self.split, self.agc)
def __init__(self, options, args):
gr.top_block.__init__(self)
self.options = options
self.args = args
frekvens = options.freq
# u = usrp.source_c(0)
# u.set_decim_rate(256)
# subdev_spec = (1,0)
# u.set_mux(usrp.determine_rx_mux_value(u,subdev_spec))
# subdev = usrp.selected_subdev(u,subdev_spec)
# subdev.set_auto_tr(True)
# subdev.set_gain(57)
# usrp.tune(u,0,subdev,frekvens)#106.3e6)
# samplerate = 64000000/256 # 250000
self.u = uhd.usrp_source("", uhd.io_type_t.COMPLEX_FLOAT32, 1)
self.u.set_subdev_spec("")
# default should be good?
self.u.set_samp_rate(250e3)
samplerate = self.u.get_samp_rate() # Retrieve what it actually does
self.u.set_antenna("RX2", 0)
if options.gain is None: # set to halfway
g = self.u.get_gain_range()
options.gain = (g.start() + g.stop()) / 2.0
if not (self.u.set_center_freq(frekvens, 0)):
print "Failed to set frequency"
sys.exit(1)
print "Setting gain to %i" % options.gain
self.u.set_gain(options.gain)
coeffs = gr.firdes.low_pass(1, samplerate, 10000, 10000)
filter = gr.fir_filter_ccf(5, coeffs)
gang = gr.multiply_const_ff(10)
lpcoeffs = gr.firdes.low_pass(1, samplerate, 8000, 3000)
lpfilter = gr.fir_filter_fff(1, lpcoeffs)
demod = gr.quadrature_demod_cf(0.5)
clockrec = gr.clock_recovery_mm_ff(
float(samplerate) / 5 / 9600, 0.25 * 0.175 * 0.175, 0.5, 0.175,
0.005)
#datadec = ais.ais_decoder_mysql("localhost","diverse","aisblock","elgelg")
self.datadec = ais.ais_decoder_gearth(30003)
slicer = gr.binary_slicer_fb()
diff = gr.diff_decoder_bb(2)
invert = ais.invert10_bb()
# print subdev.name()
self.connect(self.u, filter, demod, lpfilter, gang, clockrec, slicer,
diff, invert, self.datadec)
def __init__(self, audio_output_dev):
gr.hier_block2.__init__(self, "audio_tx",
gr.io_signature(0, 0, 0), # Input signature
gr.io_signature(0, 0, 0)) # Output signature
self.packet_src = gr.message_source(33)
voice_decoder = gsm_full_rate.decode_ps()
s2f = gr.short_to_float ()
sink_scale = gr.multiply_const_ff(1.0/32767.)
audio_sink = audio.sink(8000, audio_output_dev)
self.connect(self.packet_src, voice_decoder, s2f, sink_scale, audio_sink)
def __init__(self, audio_input_dev):
gr.hier_block2.__init__(self, "audio_rx",
gr.io_signature(0, 0, 0), # Input signature
gr.io_signature(0, 0, 0)) # Output signature
sample_rate = 44100
src = audio.source(sample_rate, audio_input_dev)
src_scale = gr.multiply_const_ff(32767)
f2s = gr.float_to_short()
voice_coder = gsm_full_rate.encode_sp()
self.packets_from_encoder = gr.msg_queue()
packet_sink = gr.message_sink(33, self.packets_from_encoder, False)
self.connect(src, src_scale, f2s, voice_coder, packet_sink)
def __init__(self, audio_input_dev):
gr.hier_block2.__init__(self, "audio_rx",
gr.io_signature(0, 0, 0), # Input signature
gr.io_signature(0, 0, 0)) # Output signature
sample_rate = 8000
src = audio.source(sample_rate, audio_input_dev)
src_scale = gr.multiply_const_ff(32767)
f2s = gr.float_to_short()
voice_coder = gsm_full_rate.encode_sp()
self.packets_from_encoder = gr.msg_queue()
packet_sink = gr.message_sink(33, self.packets_from_encoder, False)
self.connect(src, src_scale, f2s, voice_coder, packet_sink)
def __init__(self, if_rate, af_rate):
gr.hier_block2.__init__(self, "ssb_demod",
gr.io_signature(1, 1, gr.sizeof_gr_complex),
gr.io_signature(1, 1, gr.sizeof_float))
self.if_rate = int(if_rate)
self.af_rate = int(af_rate)
self.if_decim = int(if_rate / af_rate)
self.sideband = 1
self.xlate_taps = ([complex(v) for v in file('ssb_taps').readlines()])
self.audio_taps = gr.firdes.low_pass(1.0, self.af_rate, 3e3, 600,
gr.firdes.WIN_HAMMING)
self.xlate = gr.freq_xlating_fir_filter_ccc(self.if_decim,
self.xlate_taps, 0,
self.if_rate)
self.split = gr.complex_to_float()
self.lpf = gr.fir_filter_fff(1, self.audio_taps)
self.sum = gr.add_ff()
self.am_sel = gr.multiply_const_ff(0)
self.sb_sel = gr.multiply_const_ff(1)
self.mixer = gr.add_ff()
self.am_det = gr.complex_to_mag()
self.connect(self, self.xlate)
self.connect(self.xlate, self.split)
self.connect((self.split, 0), (self.sum, 0))
self.connect((self.split, 1), (self.sum, 1))
self.connect(self.sum, self.sb_sel)
self.connect(self.xlate, self.am_det)
self.connect(self.sb_sel, (self.mixer, 0))
self.connect(self.am_det, self.am_sel)
self.connect(self.am_sel, (self.mixer, 1))
self.connect(self.mixer, self.lpf)
self.connect(self.lpf, self)
def __init__(self, options, args):
gr.top_block.__init__(self)
self.options = options
self.args = args
frekvens = options.freq
# u = usrp.source_c(0)
# u.set_decim_rate(256)
# subdev_spec = (1,0)
# u.set_mux(usrp.determine_rx_mux_value(u,subdev_spec))
# subdev = usrp.selected_subdev(u,subdev_spec)
# subdev.set_auto_tr(True)
# subdev.set_gain(57)
# usrp.tune(u,0,subdev,frekvens)#106.3e6)
# samplerate = 64000000/256 # 250000
self.u = uhd.usrp_source("", uhd.io_type_t.COMPLEX_FLOAT32,1)
self.u.set_subdev_spec(""); # default should be good?
self.u.set_samp_rate(250e3);
samplerate = self.u.get_samp_rate() # Retrieve what it actually does
self.u.set_antenna("RX2",0)
if options.gain is None: # set to halfway
g = self.u.get_gain_range()
options.gain = (g.start()+g.stop()) / 2.0
if not(self.u.set_center_freq(frekvens, 0)):
print "Failed to set frequency"
sys.exit(1)
print "Setting gain to %i" % options.gain
self.u.set_gain(options.gain)
coeffs = gr.firdes.low_pass(1,samplerate,10000,10000)
filter = gr.fir_filter_ccf(5,coeffs)
gang = gr.multiply_const_ff(10)
lpcoeffs = gr.firdes.low_pass(1,samplerate,8000,3000)
lpfilter = gr.fir_filter_fff(1,lpcoeffs)
demod = gr.quadrature_demod_cf(0.5)
clockrec = gr.clock_recovery_mm_ff(float(samplerate)/5/9600,0.25*0.175*0.175,0.5,0.175,0.005)
#datadec = ais.ais_decoder_mysql("localhost","diverse","aisblock","elgelg")
self.datadec = ais.ais_decoder_gearth(30003)
slicer = gr.binary_slicer_fb()
diff = gr.diff_decoder_bb(2)
invert = ais.invert10_bb()
# print subdev.name()
self.connect(self.u,filter,demod,lpfilter,gang,clockrec,
slicer,diff,invert,self.datadec)
def __init__(
self,
parent,
unit='%',
minval=0,
maxval=100,
decimal_places=5,
sample_rate=1,
number_rate=DEFAULT_NUMBER_RATE,
label='Bit Error Rate',
size=DEFAULT_WIN_SIZE,
show_gauge=True,
**kwargs #catchall for backwards compatibility
):
gr.hier_block2.__init__(
self,
"number_sink",
gr.io_signature(1, 1, self._item_size),
gr.io_signature(0, 0, 0),
)
#blocks
sd = blks2.stream_to_vector_decimator(
item_size=self._item_size,
sample_rate=sample_rate,
vec_rate=number_rate,
vec_len=1,
)
mult = gr.multiply_const_ff(100)
add = gr.add_const_ff(1e-10)
msgq = gr.msg_queue(2)
sink = gr.message_sink(self._item_size, msgq, True)
#connect
self.connect(self, sd, mult, add, sink)
#controller
self.controller = pubsub()
#start input watcher
common.input_watcher(msgq, self.controller, MSG_KEY)
#create window
self.win = number_window(parent=parent,
controller=self.controller,
size=size,
title=label,
units=unit,
real=self._real,
minval=minval,
maxval=maxval,
decimal_places=decimal_places,
show_gauge=show_gauge,
msg_key=MSG_KEY,
sample_rate_key=SAMPLE_RATE_KEY)
def __init__(self):
gr.hier_block2.__init__(self, "agc",
gr.io_signature(1, 1, gr.sizeof_float),
gr.io_signature(1, 1, gr.sizeof_float))
self.split = gr.multiply_const_ff(1)
self.sqr = gr.multiply_ff()
self.int0 = gr.iir_filter_ffd([.004, 0], [0, .999])
self.offs = gr.add_const_ff(-30)
self.gain = gr.multiply_const_ff(70)
self.log = gr.nlog10_ff(10, 1)
self.agc = gr.divide_ff()
self.connect(self, self.split)
self.connect(self.split, (self.agc, 0))
self.connect(self.split, (self.sqr, 0))
self.connect(self.split, (self.sqr, 1))
self.connect(self.sqr, self.int0)
self.connect(self.int0, self.log)
self.connect(self.log, self.offs)
self.connect(self.offs, self.gain)
self.connect(self.gain, (self.agc, 1))
self.connect(self.agc, self)
def __init__(self, bits_per_byte):
gr.hier_block2.__init__(self, "BitErrors",
gr.io_signature(2, 2, gr.sizeof_char),
gr.io_signature(1, 1, gr.sizeof_int))
# Bit comparison
comp = gr.xor_bb()
intdump_decim = 100000
if N_BITS < intdump_decim:
intdump_decim = int(N_BITS)
self.connect(self, comp, gr.unpack_k_bits_bb(bits_per_byte),
gr.uchar_to_float(), gr.integrate_ff(intdump_decim),
gr.multiply_const_ff(1.0 / N_BITS), self)
self.connect((self, 1), (comp, 1))
def xtest_ccsds_27(self):
src_data = (1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
expected = (0, 0, 0, 0, 1, 2, 3, 4, 5, 6)
src = gr.vector_source_b(src_data)
enc = gr.encode_ccsds_27_bb()
b2f = gr.char_to_float()
add = gr.add_const_ff(-0.5)
mul = gr.multiply_const_ff(2.0)
dec = gr.decode_ccsds_27_fb()
dst = gr.vector_sink_b()
self.tb.connect(src, enc, b2f, add, mul, dec, dst)
self.tb.run()
dst_data = dst.data()
self.assertEqual(expected, dst_data)
def __init__(self, audio_output_dev):
gr.hier_block2.__init__(
self,
"audio_tx",
gr.io_signature(0, 0, 0), # Input signature
gr.io_signature(0, 0, 0)) # Output signature
self.packet_src = gr.message_source(33)
voice_decoder = gsm_full_rate.decode_ps()
s2f = gr.short_to_float()
sink_scale = gr.multiply_const_ff(1.0 / 32767.)
audio_sink = audio.sink(8000, audio_output_dev)
self.connect(self.packet_src, voice_decoder, s2f, sink_scale,
audio_sink)
def __init__(self, fg, if_rate, af_rate):
self.if_rate = if_rate
self.af_rate = af_rate
self.if_decim = if_rate / af_rate
self.sideband = 1
self.xlate_taps = ([complex(v) for v in file('ssb_taps').readlines()])
self.audio_taps = gr.firdes.low_pass(1.0, self.af_rate, 3e3, 600,
gr.firdes.WIN_HAMMING)
self.xlate = gr.freq_xlating_fir_filter_ccc(self.if_decim,
self.xlate_taps, 0,
self.if_rate)
self.split = gr.complex_to_float()
self.lpf = gr.fir_filter_fff(1, self.audio_taps)
self.sum = gr.add_ff()
self.am_sel = gr.multiply_const_ff(0)
self.sb_sel = gr.multiply_const_ff(1)
self.mixer = gr.add_ff()
self.am_det = gr.complex_to_mag()
fg.connect(self.xlate, self.split)
fg.connect((self.split, 0), (self.sum, 0))
fg.connect((self.split, 1), (self.sum, 1))
fg.connect(self.sum, self.sb_sel)
fg.connect(self.xlate, self.am_det)
fg.connect(self.sb_sel, (self.mixer, 0))
fg.connect(self.am_det, self.am_sel)
fg.connect(self.am_sel, (self.mixer, 1))
fg.connect(self.mixer, self.lpf)
gr.hier_block.__init__(self, fg, self.xlate, self.lpf)
def run_test(fo, fi, interleaver, Kb, bitspersymbol, K, dimensionality,
constellation, Es, N0, IT, seed):
tb = gr.top_block()
# TX
src = gr.lfsr_32k_source_s()
src_head = gr.head(gr.sizeof_short, Kb / 16) # packet size in shorts
s2fsmi = gr.packed_to_unpacked_ss(
bitspersymbol, gr.GR_MSB_FIRST
) # unpack shorts to symbols compatible with the outer FSM input cardinality
#src = gr.vector_source_s([0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1],False)
enc = trellis.pccc_encoder_ss(fo, 0, fi, 0, interleaver, K)
code = gr.vector_sink_s()
mod = gr.chunks_to_symbols_sf(constellation, dimensionality)
# CHANNEL
add = gr.add_ff()
noise = gr.noise_source_f(gr.GR_GAUSSIAN, math.sqrt(N0 / 2), seed)
# RX
metrics_in = trellis.metrics_f(
fi.O() * fo.O(), dimensionality, constellation,
digital.TRELLIS_EUCLIDEAN
) # data preprocessing to generate metrics for innner SISO
scale = gr.multiply_const_ff(1.0 / N0)
dec = trellis.pccc_decoder_s(fo, 0, -1, fi, 0, -1, interleaver, K, IT,
trellis.TRELLIS_MIN_SUM)
fsmi2s = gr.unpacked_to_packed_ss(
bitspersymbol, gr.GR_MSB_FIRST) # pack FSM input symbols to shorts
dst = gr.check_lfsr_32k_s()
tb.connect(src, src_head, s2fsmi, enc, mod)
#tb.connect (src,enc,mod)
#tb.connect(enc,code)
tb.connect(mod, (add, 0))
tb.connect(noise, (add, 1))
tb.connect(add, metrics_in, scale, dec, fsmi2s, dst)
tb.run()
#print code.data()
ntotal = dst.ntotal()
nright = dst.nright()
runlength = dst.runlength()
return (ntotal, ntotal - nright)