def __init__(self, options):
gr.top_block.__init__(self)
if options.outfile is not None:
u = gr.file_sink(gr.sizeof_gr_complex, options.outfile)
elif (options.tx_freq is not None) or (options.channel is not None):
if options.channel is not None:
self.chan_num = options.channel
options.tx_freq = ieee802_15_4_pkt.chan_802_15_4.chan_map[self.chan_num]
u = uhd_transmitter(options.tx_args,
options.bandwidth,
options.tx_freq, options.tx_gain,
options.spec, options.antenna,
options.verbose, options.external)
else:
raise SystemExit("--tx-freq, --channel or --outfile must be specified\n")
self.samples_per_symbol = 2
# transmitter
self.packet_transmitter = ieee802_15_4_pkt.ieee802_15_4_mod_pkts(self,
spb=self.samples_per_symbol, msgq_limit=2, log=options.log)
self.amp = gr.multiply_const_cc(1)
self.u = u
self.connect(self.packet_transmitter, self.amp, self.u)
self.connect(self.amp, gr.file_sink(gr.sizeof_gr_complex, 'cc2420-tx-diag.dat'))
def __init__(self, options):
gr.top_block.__init__(self)
if options.freq is not None:
u = usrp2.sink(options)
elif options.outfile is not None:
u = gr.file_sink(gr.sizeof_gr_complex, options.outfile)
else:
raise SystemExit("--freq or --outfile must be specified\n")
if options.infile is not None:
tx = gr.file_source(gr.sizeof_gr_complex, options.infile)
else:
tx = qam_rxtx.TX(options)
framebytes = tx.framebytes
if options.txdata is not None:
data = gr.file_source(framebytes * gr.sizeof_char, options.txdata, options.repeat)
else:
data = qam_rxtx.make_data(framebytes)
if options.log:
self.connect(data, gr.file_sink(framebytes * gr.sizeof_char, 'tx-data.datb'))
self.connect(data, tx)
self.sender = ofdm_rxtx.sender_thread(tx.ofdm, options)
if options.amp != 1:
amp = gr.multiply_const_cc(options.amp)
self.connect(tx, amp, u)
else:
self.connect(tx, u)
def _setup_logging(self):
print "Modulation logging turned on."
self.connect(self.nrz, gr.file_sink(gr.sizeof_float, "nrz.dat"))
self.connect(self.gaussian_filter,
gr.file_sink(gr.sizeof_float, "gaussian_filter.dat"))
self.connect(self.fmmod, gr.file_sink(gr.sizeof_gr_complex,
"fmmod.dat"))
def __init__(self):
gr.top_block.__init__(self)
length = 101
data_r = range(length)
data_i = range(length,2*length)
src_r = gr.vector_source_s(data_r, False)
src_i = gr.vector_source_s(data_i, False)
s2f_r = gr.short_to_float()
s2f_i = gr.short_to_float()
f2c = gr.float_to_complex()
s2v = gr.stream_to_vector(gr.sizeof_gr_complex, length)
shift = True
ifft = gr.fft_vcc(length, False, [], shift)
fft = gr.fft_vcc(length, True, [], shift)
v2s = gr.vector_to_stream(gr.sizeof_gr_complex, length)
snk_in = gr.file_sink(gr.sizeof_gr_complex, "fftshift.in")
snk_out = gr.file_sink(gr.sizeof_gr_complex, "fftshift.out")
self.connect(src_r, s2f_r, (f2c,0))
self.connect(src_i, s2f_i, (f2c,1))
self.connect(f2c, snk_in)
self.connect(f2c, s2v, ifft, fft, v2s, snk_out)
def connect_coarse_search(self, rate_var):
slicer_dicer_dump = gr.file_sink(gr.sizeof_gr_complex,
"search/slicer_dicer.dat")
self.connect(self.slicer_dicer, slicer_dicer_dump)
for ii in range(2 * rate_var + 1):
rr = self.resamplers[ii]
cc = self.correlators[ii]
cm = gr.complex_to_mag()
pd = self.peak_d[ii]
pc = rfidbts.peak_count_stream(int(self.frame_size_rn16 * 3), 500)
#file sinks
ms = gr.file_sink(gr.sizeof_float,
"search/resamp_" + str(ii) + ".dat")
ps = gr.file_sink(gr.sizeof_float,
"search/peak_" + str(ii) + ".dat")
strobe = gr.file_sink(gr.sizeof_char,
"search/strobe_" + str(ii) + ".dat")
#system blocks
self.connect(self, rr, cc, cm, pd, pc)
self.connect(cm, (pc, 1))
self.connect(pc, (self.pick_peak, ii))
self.connect(rr, (self.slicer_dicer, ii))
#file sinks
self.connect(pd, strobe)
self.connect((pd, 1), ps)
self.connect(cm, ms)
def __init__(self):
gr.top_block.__init__(self)
sample_rate = 32000
ampl = 0.1
self._fft_length=96
win = []
#win = [1 for i in range(self._fft_length)]
win2 = [1 for i in range(self._fft_length)]
# Constructing a sine source and the fft blocks
src0 = gr.sig_source_c (sample_rate, gr.GR_SIN_WAVE, 350, ampl)
ss2v = gr.stream_to_vector(gr.sizeof_gr_complex, self._fft_length)
sv2s = gr.vector_to_stream(gr.sizeof_gr_complex, self._fft_length)
fft_demod = gr.fft_vcc(self._fft_length, True, win2, False)
ifft = gr.fft_vcc(self._fft_length, False, win, False)
scale = gr.multiply_const_cc(1.0 / self._fft_length)
# Some output data files
trans_output = gr.file_sink(gr.sizeof_gr_complex, "trans_output.dat")
reg_output = gr.file_sink(gr.sizeof_gr_complex, "reg_output.dat")
# make the connections #
self.connect(src0, ss2v, fft_demod, ifft, sv2s, scale, trans_output)
self.connect(src0, reg_output)
def __init__(self, options):
gr.top_block.__init__(self)
if options.outfile is not None:
u = gr.file_sink(gr.sizeof_gr_complex, options.outfile)
elif (options.tx_freq is not None) or (options.channel is not None):
if options.channel is not None:
self.chan_num = options.channel
options.tx_freq = ieee802_15_4_pkt.chan_802_15_4.chan_map[
self.chan_num]
u = uhd_transmitter(options.tx_args, options.bandwidth,
options.tx_freq, options.tx_gain, options.spec,
options.antenna, options.verbose,
options.external)
else:
raise SystemExit(
"--tx-freq, --channel or --outfile must be specified\n")
self.samples_per_symbol = 2
# transmitter
self.packet_transmitter = ieee802_15_4_pkt.ieee802_15_4_mod_pkts(
self, spb=self.samples_per_symbol, msgq_limit=2, log=options.log)
self.amp = gr.multiply_const_cc(1)
self.u = u
self.connect(self.packet_transmitter, self.amp, self.u)
self.connect(self.amp,
gr.file_sink(gr.sizeof_gr_complex, 'cc2420-tx-diag.dat'))
def build_graph (input, raw, snr, freq_offset, coeffs, mag):
# Initialize empty flow graph
fg = gr.top_block ()
# Set up file source
src = gr.file_source (1, input)
# Set up GMSK modulator, 2 samples per symbol
mod = gmsk_mod(2)
# Amplify the signal
tx_amp = 1
amp = gr.multiply_const_cc(1)
amp.set_k(tx_amp)
# Compute proper noise voltage based on SNR
SNR = 10.0**(snr/10.0)
power_in_signal = abs(tx_amp)**2
noise_power = power_in_signal/SNR
noise_voltage = math.sqrt(noise_power)
# Generate noise
rseed = int(time.time())
noise = gr.noise_source_c(gr.GR_GAUSSIAN, noise_voltage, rseed)
adder = gr.add_cc()
fg.connect(noise, (adder, 1))
# Create the frequency offset, 0 for now
offset = gr.sig_source_c(1, gr.GR_SIN_WAVE, freq_offset, 1.0, 0.0)
mixer = gr.multiply_cc()
fg.connect(offset, (mixer, 1))
# Pass the noisy data to the matched filter
dfile = open(coeffs, 'r')
data = []
for line in dfile:
data.append(complex(*map(float,line.strip().strip("()").split(" "))).conjugate())
dfile.close()
data.reverse()
mfilter = gr.fir_filter_ccc(1, data)
# Connect the flow graph
fg.connect(src, mod)
fg.connect(mod, (mixer, 0))
fg.connect(mixer, (adder, 0))
if mag:
raw_dst = gr.file_sink (gr.sizeof_float, raw)
magnitude = gr.complex_to_mag(1)
fg.connect(adder, mfilter, magnitude, raw_dst)
else:
raw_dst = gr.file_sink (gr.sizeof_gr_complex, raw)
fg.connect(adder, mfilter, raw_dst)
print "SNR(db): " + str(snr)
print "Frequency Offset: " + str(freq_offset)
return fg
def __init__(self):
gr.top_block.__init__(self)
usage="%prog: [options] output_filename"
parser = OptionParser(option_class=eng_option, usage=usage)
parser.add_option("-I", "--audio-input", type="string", default="",
help="pcm input device name. E.g., hw:0,0 or /dev/dsp")
parser.add_option("-s", "--sample-rate", type="eng_float", default=48000,
help="set sample rate to RATE (48000)")
parser.add_option("-N", "--nsamples", type="eng_float", default=None,
help="number of samples to collect [default=+inf]")
(options, args) = parser.parse_args ()
if len(args) != 2:
parser.print_help()
raise SystemExit, 1
filename = args[0]
filename2 = args[1]
sample_rate = int(options.sample_rate)
src = audio.source (sample_rate, options.audio_input)
dst = gr.file_sink (gr.sizeof_float, filename)
dst2 = gr.file_sink (gr.sizeof_float, filename2)
if options.nsamples is None:
self.connect((src, 0), dst)
self.connect((src, 1), dst2)
else:
head = gr.head(gr.sizeof_float, int(options.nsamples))
head2 = gr.head(gr.sizeof_float, int(options.nsamples))
self.connect((src, 0), head, dst)
self.connect((src, 1), head2, dst2)
def __init__(self, queue, freq=0.0, verbose=False, log=False):
gr.hier_block2.__init__(self, "flex_demod",
gr.io_signature(1, 1, gr.sizeof_gr_complex),
gr.io_signature(0, 0, 0))
k = 25000 / (2 * pi * 1600) # 4800 Hz max deviation
quad = gr.quadrature_demod_cf(k)
self.connect(self, quad)
rsamp = blks2.rational_resampler_fff(16, 25)
self.slicer = pager_swig.slicer_fb(
5e-6) # DC removal averaging filter constant
self.sync = pager_swig.flex_sync()
self.connect(quad, rsamp, self.slicer, self.sync)
for i in range(4):
self.connect((self.sync, i), pager_swig.flex_deinterleave(),
pager_swig.flex_parse(queue, freq))
if log:
suffix = '_' + "%3.3f" % (freq / 1e6, ) + '.dat'
quad_sink = gr.file_sink(gr.sizeof_float, 'quad' + suffix)
rsamp_sink = gr.file_sink(gr.sizeof_float, 'rsamp' + suffix)
slicer_sink = gr.file_sink(gr.sizeof_char, 'slicer' + suffix)
self.connect(rsamp, rsamp_sink)
self.connect(quad, quad_sink)
self.connect(self.slicer, slicer_sink)
def __init__(self, queue, freq=0.0, verbose=False, log=False):
gr.hier_block2.__init__(self, "flex_demod",
gr.io_signature(1, 1, gr.sizeof_gr_complex),
gr.io_signature(0,0,0))
k = 25000/(2*pi*1600) # 4800 Hz max deviation
quad = gr.quadrature_demod_cf(k)
self.connect(self, quad)
rsamp = blks2.rational_resampler_fff(16, 25)
self.slicer = pager_swig.slicer_fb(5e-6) # DC removal averaging filter constant
self.sync = pager_swig.flex_sync()
self.connect(quad, rsamp, self.slicer, self.sync)
for i in range(4):
self.connect((self.sync, i), pager_swig.flex_deinterleave(), pager_swig.flex_parse(queue, freq))
if log:
suffix = '_'+ "%3.3f" % (freq/1e6,) + '.dat'
quad_sink = gr.file_sink(gr.sizeof_float, 'quad'+suffix)
rsamp_sink = gr.file_sink(gr.sizeof_float, 'rsamp'+suffix)
slicer_sink = gr.file_sink(gr.sizeof_char, 'slicer'+suffix)
self.connect(rsamp, rsamp_sink)
self.connect(quad, quad_sink)
self.connect(self.slicer, slicer_sink)
def __init__(self, callback, options):
gr.top_block.__init__(self)
# hard-coded known symbol
ks1 = known_symbols_4512_1[0:options.occupied_tones]
ks2 = known_symbols_4512_2[0:options.occupied_tones]
self._rcvd_pktq = gr.msg_queue()
# accepts messages from the outside world
self.ofdm_mapper = gr.ofdm_bpsk_mapper(4, options.occupied_tones, options.fft_length, ks1, ks2)
self.ofdm_corr = gr.ofdm_correlator(options.occupied_tones, options.fft_length, 0, ks1, ks2)
self.ofdm_framer = gr.ofdm_frame_sink(self._rcvd_pktq, options.occupied_tones)
if 0: # set to 1 to put the correlator in the path to take over the signalling
self.connect((self.ofdm_mapper, 0), (self.ofdm_corr, 0))
self.connect((self.ofdm_corr, 0), (self.ofdm_framer, 0))
self.connect((self.ofdm_corr, 1), (self.ofdm_framer, 1))
self.connect((self.ofdm_mapper,0), gr.file_sink(gr.sizeof_gr_complex*options.fft_length, "ofdm_mapper.dat"))
self.connect((self.ofdm_corr,0), gr.file_sink(gr.sizeof_gr_complex*options.occupied_tones, "ofdm_corr.dat"))
self.connect((self.ofdm_corr,1), gr.file_sink(gr.sizeof_char, "ofdm_sig.dat"))
else:
self.connect((self.ofdm_mapper, 0), (self.ofdm_framer, 0))
self.connect((self.ofdm_mapper, 1), (self.ofdm_framer, 1))
self.connect((self.ofdm_mapper,0), gr.file_sink(gr.sizeof_gr_complex*options.fft_length, "ofdm_mapper.dat"))
self.connect((self.ofdm_mapper,1), gr.file_sink(gr.sizeof_char, "ofdm_sig.dat"))
self._watcher = _queue_watcher_thread(self._rcvd_pktq, callback)
def _setup_logging(self):
print "Modulation logging turned on."
self.connect(self.bytes2chunks, gr.file_sink(gr.sizeof_char, "tx_bytes2chunks.dat"))
self.connect(self.symbol_mapper, gr.file_sink(gr.sizeof_char, "tx_graycoder.dat"))
self.connect(self.diffenc, gr.file_sink(gr.sizeof_char, "tx_diffenc.dat"))
self.connect(self.chunks2symbols, gr.file_sink(gr.sizeof_gr_complex, "tx_chunks2symbols.dat"))
self.connect(self.rrc_filter, gr.file_sink(gr.sizeof_gr_complex, "tx_rrc_filter.dat"))
def __init__(self, options, payload=''):
gr.top_block.__init__(self)
if (options.tx_freq is not None):
self.sink = uhd_transmitter(options.args, options.bandwidth,
options.tx_freq, options.tx_gain,
options.spec, options.antenna,
options.verbose)
elif (options.to_file is not None):
self.sink = gr.file_sink(gr.sizeof_gr_complex, options.to_file)
else:
self.sink = gr.null_sink(gr.sizeof_gr_complex)
options.interp = 100e6 / options.bandwidth # FTW-specific convertion
# do this after for any adjustments to the options that may
# occur in the sinks (specifically the UHD sink)
if (options.from_file is None):
self.txpath = ftw_transmit_path(options, payload)
else:
self.txpath = gr.file_source(gr.sizeof_gr_complex,
options.from_file)
# options.tx_amplitude = 1
# static value to make sure we do not exceed +-1 for the floats being sent to the sink
self._tx_amplitude = options.tx_amplitude
self.amp = gr.multiply_const_cc(self._tx_amplitude)
# self.txpath = ftw_pnc_transmit_path(options, payload)
self.connect(self.txpath, self.amp, self.sink)
if options.log:
self.connect(
self.txpath,
gr.file_sink(gr.sizeof_gr_complex, 'ftw_benchmark.dat'))
def __init__(self, options):
gr.top_block.__init__(self)
if options.freq is not None:
u = usrp2.sink(options)
elif options.outfile is not None:
u = gr.file_sink(gr.sizeof_gr_complex, options.outfile)
else:
raise SystemExit("--freq or --outfile must be specified\n")
if options.infile is not None:
tx = gr.file_source(gr.sizeof_gr_complex, options.infile)
else:
tx = qam_rxtx.TX(options)
framebytes = tx.framebytes
if options.txdata is not None:
data = gr.file_source(framebytes * gr.sizeof_char,
options.txdata, options.repeat)
else:
data = qam_rxtx.make_data(framebytes)
if options.log:
self.connect(
data,
gr.file_sink(framebytes * gr.sizeof_char,
'tx-data.datb'))
self.connect(data, tx)
self.sender = ofdm_rxtx.sender_thread(tx.ofdm, options)
if options.amp != 1:
amp = gr.multiply_const_cc(options.amp)
self.connect(tx, amp, u)
else:
self.connect(tx, u)
def __init__(self, options, payload=''):
gr.top_block.__init__(self)
if(options.tx_freq is not None):
self.sink = uhd_transmitter(options.args,
options.bandwidth,
options.tx_freq, options.tx_gain,
options.spec, options.antenna,
options.verbose)
elif(options.to_file is not None):
self.sink = gr.file_sink(gr.sizeof_gr_complex, options.to_file)
else:
self.sink = gr.null_sink(gr.sizeof_gr_complex)
options.interp = 100e6/options.bandwidth # FTW-specific convertion
# do this after for any adjustments to the options that may
# occur in the sinks (specifically the UHD sink)
if(options.from_file is None):
self.txpath = ftw_transmit_path(options, payload)
else:
self.txpath = gr.file_source(gr.sizeof_gr_complex, options.from_file);
# options.tx_amplitude = 1
# static value to make sure we do not exceed +-1 for the floats being sent to the sink
self._tx_amplitude = options.tx_amplitude
self.amp = gr.multiply_const_cc(self._tx_amplitude)
# self.txpath = ftw_pnc_transmit_path(options, payload)
self.connect(self.txpath, self.amp, self.sink)
if options.log:
self.connect(self.txpath, gr.file_sink(gr.sizeof_gr_complex, 'ftw_benchmark.dat'))
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, options):
self.rx = raw.ofdm_demod(options, (options.nsr is not None) and 4 or 2)
self.params = self.rx.params
symbol_size = self.params.data_tones * gr.sizeof_gr_complex
gr.hier_block2.__init__(self, "RX",
gr.io_signature(1,1, gr.sizeof_gr_complex),
gr.io_signature(1,1, symbol_size))
ff = raw.fix_frame(symbol_size, options.size)
self.connect(self, self.rx, (ff,0), self)
self.connect((self.rx,1), (ff,1))
# noise-to-signal ratio estimate
# TODO: make it a proper output from the block
if options.nsr is not None:
nsr = gr.divide_ff()
self.connect((self.rx,2), gr.integrate_ff(options.size), (nsr,0))
self.connect((self.rx,3), gr.integrate_ff(options.size), (nsr,1))
self.connect(nsr, gr.file_sink(gr.sizeof_float, options.nsr)) # what to do with the output?
acq = self.rx.ofdm_recv.frame_acq
acq.set_min_symbols(options.size)
if options.numpkts is not None:
acq.set_num_frames(options.numpkts)
self.size = options.size
if options.log:
self.connect((self.rx,0), gr.file_sink(symbol_size, 'rx-ofdmdemod.dat'))
self.connect((self.rx,1), gr.file_sink(gr.sizeof_char, 'rx-ofdmdemod.datb'))
self.connect((ff,0), gr.file_sink(symbol_size, 'rx-fixframe.dat'))
def __init__(self, bitrate, ncarriers, nsymbols, log=False):
(qambits, (nc, np)) = bitrates[bitrate]
frametones = ncarriers * nsymbols
self.framebytes = framebytes((qambits, (nc, np)), frametones)
self.framebytes -= 1 # room for padding
gr.hier_block2.__init__(self, "qam_tx",
gr.io_signature(1,1, gr.sizeof_char),
gr.io_signature(1,1, gr.sizeof_gr_complex))
conv = raw.conv_enc()
punc = raw.conv_punc(nc, np)
intrlv = raw.intrlv_bit(ncarriers, qambits, False)
qam = raw.qam_enc(qambits)
pad = raw.conv_punc(self.framebytes, self.framebytes+1)
# main source accepts whole frames!
self.connect(self,
pad,
conv,
punc,
intrlv,
qam,
self)
if log:
self.connect(intrlv,
gr.file_sink(gr.sizeof_char, "tx-intrlv.datb"))
self.connect(punc,
gr.file_sink(gr.sizeof_char, "tx-punc.datb"))
self.connect(conv,
gr.file_sink(gr.sizeof_char, "tx-conv.datb"))
self.connect(pad,
gr.file_sink(gr.sizeof_char, "tx-pad.datb"))
def _setup_logging(self):
print "Demodulation logging turned on."
self.connect(self.fmdemod, gr.file_sink(gr.sizeof_float,
"fmdemod.dat"))
self.connect(self.clock_recovery,
gr.file_sink(gr.sizeof_float, "clock_recovery.dat"))
self.connect(self.slicer, gr.file_sink(gr.sizeof_char, "slicer.dat"))
def __init__(self, bitrate, ncarriers, nsymbols, log=False):
(qambits, (nc, np)) = bitrates[bitrate]
frametones = ncarriers * nsymbols
self.framebytes = framebytes((qambits, (nc, np)), frametones)
self.framebytes -= 1 # room for padding
gr.hier_block2.__init__(self, "qam_rx",
gr.io_signature(1,1, gr.sizeof_gr_complex),
gr.io_signature(1,1, gr.sizeof_char))
conv = raw.conv_dec((self.framebytes+1)*8) # decoded length in bits including padding
punc = raw.conv_punc(np, nc, 128)
intrlv = raw.intrlv_bit(ncarriers, qambits, True)
qam = raw.qam_dec(qambits)
pad = raw.conv_punc(self.framebytes+1, self.framebytes)
self.connect(self,
qam,
intrlv,
punc,
conv, # output is stream of bytes... includes padding
pad,
self)
if log:
self.connect(qam,
gr.file_sink(gr.sizeof_char, "rx-intrlv.datb"))
self.connect(intrlv,
gr.file_sink(gr.sizeof_char, "rx-punc.datb"))
self.connect(punc,
gr.file_sink(gr.sizeof_char, "rx-conv.datb"))
self.connect(conv,
gr.file_sink(gr.sizeof_char, "rx-pad.datb"))
def build_graph (input, output, coeffs, mag):
# Initialize empty flow graph
fg = gr.top_block ()
# Set up file source
src = gr.file_source (gr.sizeof_gr_complex, input)
# Read coefficients for the matched filter
dfile = open(coeffs, 'r')
data = []
for line in dfile:
data.append(complex(*map(float,line.strip().strip("()").split(" "))).conjugate())
dfile.close()
data.reverse()
mfilter = gr.fir_filter_ccc(1, data)
# If the output is magnitude, it is float, else its complex
if mag:
magnitude = gr.complex_to_mag(1)
dst = gr.file_sink (gr.sizeof_float, output)
fg.connect(src, mfilter, magnitude, dst)
else:
dst = gr.file_sink (gr.sizeof_gr_complex, output)
fg.connect(src, mfilter, dst)
return fg
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 _setup_logging(self):
print "Modulation logging turned on."
self.connect(self.B2s, gr.file_sink(gr.sizeof_float, "symbols.dat"))
self.connect(self.pam, gr.file_sink(gr.sizeof_float, "pam.dat"))
self.connect(self.filter, gr.file_sink(gr.sizeof_float, "filter.dat"))
self.connect(self.fmmod, gr.file_sink(gr.sizeof_gr_complex,
"fmmod.dat"))
def __init__(self, callback, options):
gr.top_block.__init__(self)
### Rx Side ###
if(options.rx_freq is not None):
self.source = uhd_receiver(options.args_rx,
options.bandwidth,
options.rx_freq, options.rx_gain,
options.spec, options.antenna,
options.verbose)
elif(options.from_file is not None):
self.source = gr.file_source(gr.sizeof_gr_complex, options.from_file)
else:
self.source = gr.null_source(gr.sizeof_gr_complex)
# Set up receive path
# do this after for any adjustments to the options that may
# occur in the sinks (specifically the UHD sink)
self.rxpath = receive_path(callback, options)
## Tx Side ###
if(options.tx_freq is not None):
self.sink = uhd_transmitter(options.args_tx,
options.bandwidth,
options.tx_freq, options.tx_gain,
options.spec, options.antenna,
options.verbose)
elif(options.to_file is not None):
self.sink = gr.file_sink(gr.sizeof_gr_complex, options.to_file)
else:
self.sink = gr.null_sink(gr.sizeof_gr_complex)
# do this after for any adjustments to the options that may
# occur in the sinks (specifically the UHD sink)
self.txpath = transmit_path(options)
self.connect(self.txpath, self.sink)
# self.txpath = gr.message_source(gr.sizeof_gr_complex, 3)
# nco_sensitivity = 2.0/options.fft_length # correct for fine frequency
# self.nco = ftw.pnc_frequency_modulator_fc(nco_sensitivity)
# self.connect(self.txpath, self.sink) # self.nco,
# if you use two USRPs and want to synchonized
# need to change uhd_interface.py
# self.source.config_mimo()
# time.sleep(1) # to make sync stable
if options.debug:
self.connect(self.source, gr.file_sink(gr.sizeof_gr_complex, 'rx.dat')) # Save reception signal
else:
self.connect(self.source, self.rxpath)
#self.connect(self.source, gr.file_sink(gr.sizeof_gr_complex, 'rx.dat'))
if(options.verbose):
self._print_verbage()
def __init__(self, *args, **kwargs):
"""
Hierarchical block for O-QPSK demodulation.
The input is the complex modulated signal at baseband
and the output is a stream of bytes.
@param sps: samples per symbol
@type sps: integer
"""
try:
self.sps = kwargs.pop('sps')
self.log = kwargs.pop('log')
except KeyError:
pass
gr.hier_block2.__init__(
self,
"ieee802_15_4_demod",
gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input
gr.io_signature(1, 1, gr.sizeof_float)) # Output
# Demodulate FM
sensitivity = (pi / 2) / self.sps
#self.fmdemod = gr.quadrature_demod_cf(1.0 / sensitivity)
self.fmdemod = gr.quadrature_demod_cf(1)
# Low pass the output of fmdemod to allow us to remove
# the DC offset resulting from frequency offset
alpha = 0.0008 / self.sps
self.freq_offset = gr.single_pole_iir_filter_ff(alpha)
self.sub = gr.sub_ff()
self.connect(self, self.fmdemod)
self.connect(self.fmdemod, (self.sub, 0))
self.connect(self.fmdemod, self.freq_offset, (self.sub, 1))
# recover the clock
omega = self.sps
gain_mu = 0.03
mu = 0.5
omega_relative_limit = 0.0002
freq_error = 0.0
gain_omega = .25 * gain_mu * gain_mu # critically damped
self.clock_recovery = digital.clock_recovery_mm_ff(
omega, gain_omega, mu, gain_mu, omega_relative_limit)
# Connect
self.connect(self.sub, self.clock_recovery, self)
if self.log:
self.connect(self.fmdemod,
gr.file_sink(gr.sizeof_float, 'rx-fmdemod.dat'))
self.connect(self.freq_offset,
gr.file_sink(gr.sizeof_float, 'rx-fo.dat'))
self.connect(self.sub, gr.file_sink(gr.sizeof_float, 'rx-sub.dat'))
self.connect(self.clock_recovery,
gr.file_sink(gr.sizeof_float, 'rx-recovery.dat'))
def _setup_logging(self):
print "Modulation logging turned on."
self._fg.connect(self.nrz,
gr.file_sink(gr.sizeof_float, "nrz.dat"))
self._fg.connect(self.gaussian_filter,
gr.file_sink(gr.sizeof_float, "gaussian_filter.dat"))
self._fg.connect(self.fmmod,
gr.file_sink(gr.sizeof_gr_complex, "fmmod.dat"))
def _setup_logging(self):
print "Demodulation logging turned on."
self._fg.connect(self.fmdemod,
gr.file_sink(gr.sizeof_float, "fmdemod.dat"))
self._fg.connect(self.clock_recovery,
gr.file_sink(gr.sizeof_float, "clock_recovery.dat"))
self._fg.connect(self.slicer,
gr.file_sink(gr.sizeof_char, "slicer.dat"))
def __init__(self):
grc_wxgui.top_block_gui.__init__(self, title="Top Block")
_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 = 100000
##################################################
# Blocks
##################################################
self.wxgui_fftsink2_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=samp_rate * 10,
fft_size=1024,
fft_rate=15,
average=False,
avg_alpha=None,
title="FFT Plot",
peak_hold=False,
)
self.Add(self.wxgui_fftsink2_0.win)
self.uhd_usrp_source_0 = uhd.usrp_source(
device_addr="addr0=192.168.10.2,addr1=192.168.10.3",
stream_args=uhd.stream_args(
cpu_format="fc32",
channels=range(2),
),
)
self.uhd_usrp_source_0.set_clock_source("mimo", 1)
self.uhd_usrp_source_0.set_time_source("mimo", 1)
self.uhd_usrp_source_0.set_samp_rate(samp_rate)
self.uhd_usrp_source_0.set_center_freq(4.9e9 + 20000, 0)
self.uhd_usrp_source_0.set_gain(15, 0)
self.uhd_usrp_source_0.set_center_freq(4.9e9 + 20000, 1)
self.uhd_usrp_source_0.set_gain(15, 1)
self.gr_file_sink_0_0 = gr.file_sink(
gr.sizeof_gr_complex * 1,
"/home/sdruser/COLLINS/Pre/UChannel2_S.txt")
self.gr_file_sink_0_0.set_unbuffered(False)
self.gr_file_sink_0 = gr.file_sink(
gr.sizeof_gr_complex * 1,
"/home/sdruser/COLLINS/Pre/UChannel1_S.txt")
self.gr_file_sink_0.set_unbuffered(False)
##################################################
# Connections
##################################################
self.connect((self.uhd_usrp_source_0, 0), (self.gr_file_sink_0, 0))
self.connect((self.uhd_usrp_source_0, 1), (self.gr_file_sink_0_0, 0))
self.connect((self.uhd_usrp_source_0, 1), (self.wxgui_fftsink2_0, 0))
def __init__(self, options):
gr.top_block.__init__(self)
self._fft_length = 64
self._cp_length = 16
self._symbol_length = self._fft_length + self._cp_length
N_sym = 25
ofdm_preamble = [list(fft_preamble)]
# print len(fft_preamble)
gap = [list(gap_sample)]
win = []
inchr = (
chr(0x00)
+ chr(0x00)
+ chr(0x00)
+ chr(0x00)
+ chr(0x00)
+ chr(0x00)
+ chr(0x00)
+ chr(0x00)
+ chr(0x00)
+ chr(0x00)
)
inchr = (
inchr
+ chr(0x00)
+ chr(0x00)
+ chr(0x00)
+ chr(0x00)
+ chr(0x00)
+ chr(0x00)
+ chr(0x00)
+ chr(0x00)
+ chr(0x00)
+ chr(0x00)
)
inchr = inchr + chr(0x00) + chr(0x00) + chr(0x00) + chr(0x00) + chr(0x00)
a = map(ord, chr(0))
self.source = gr.file_source(gr.sizeof_gr_complex * self._symbol_length, options.from_file)
self.vector_source = gr.vector_source_b(a, False, 1)
self.preamble = gr_ieee802_11.ofdm_preamble_insert(self._symbol_length, N_sym, ofdm_preamble)
self.zerogap = gr_ieee802_11.ofdm_zerogap_insert(self._symbol_length, N_sym, gap)
self.sink = gr.file_sink(gr.sizeof_gr_complex * self._symbol_length, options.to_file)
self.connect(self.source, (self.preamble, 0))
self.connect(self.vector_source, (self.preamble, 1))
self.connect((self.preamble, 1), (self.zerogap, 1))
self.connect(self.preamble, self.zerogap, self.sink)
# self.connect(self.ifft, gr.file_sink(gr.sizeof_gr_complex * self._fft_length, "ofdm_ifft_test.dat"))
self.connect(
self.preamble, gr.file_sink(gr.sizeof_gr_complex * self._symbol_length, "ofdm_preamble_test_3.6.4.dat")
)
def __init__(self, callback, options):
gr.top_block.__init__(self)
### Rx Side ###
if (options.rx_freq is not None):
self.source = uhd_receiver(options.args_rx, options.bandwidth,
options.rx_freq, options.rx_gain,
options.spec, options.antenna,
options.verbose)
elif (options.from_file is not None):
self.source = gr.file_source(gr.sizeof_gr_complex,
options.from_file)
else:
self.source = gr.null_source(gr.sizeof_gr_complex)
# Set up receive path
# do this after for any adjustments to the options that may
# occur in the sinks (specifically the UHD sink)
self.rxpath = receive_path(callback, options)
## Tx Side ###
if (options.tx_freq is not None):
self.sink = uhd_transmitter(options.args_tx, options.bandwidth,
options.tx_freq, options.tx_gain,
options.spec, options.antenna,
options.verbose)
elif (options.to_file is not None):
self.sink = gr.file_sink(gr.sizeof_gr_complex, options.to_file)
else:
self.sink = gr.null_sink(gr.sizeof_gr_complex)
# do this after for any adjustments to the options that may
# occur in the sinks (specifically the UHD sink)
self.txpath = transmit_path(options)
self.connect(self.txpath, self.sink)
# self.txpath = gr.message_source(gr.sizeof_gr_complex, 3)
# nco_sensitivity = 2.0/options.fft_length # correct for fine frequency
# self.nco = ftw.pnc_frequency_modulator_fc(nco_sensitivity)
# self.connect(self.txpath, self.sink) # self.nco,
# if you use two USRPs and want to synchonized
# need to change uhd_interface.py
# self.source.config_mimo()
# time.sleep(1) # to make sync stable
if options.debug:
self.connect(self.source,
gr.file_sink(gr.sizeof_gr_complex,
'rx.dat')) # Save reception signal
else:
self.connect(self.source, self.rxpath)
#self.connect(self.source, gr.file_sink(gr.sizeof_gr_complex, 'rx.dat'))
if (options.verbose):
self._print_verbage()
def __init__(self): grc_wxgui.top_block_gui.__init__(self, title="Top Block") ################################################## # Variables ################################################## self.samp_rate = samp_rate = 32000 self.remove_head = remove_head = 0 ################################################## # Blocks ################################################## self._remove_head_chooser = forms.radio_buttons( parent=self.GetWin(), value=self.remove_head, callback=self.set_remove_head, label="Remove Head", choices=[0,1], labels=[], style=wx.RA_HORIZONTAL, ) self.Add(self._remove_head_chooser) self.wxgui_scopesink2_0 = scopesink2.scope_sink_f( self.GetWin(), title="Scope Plot", sample_rate=samp_rate, v_scale=0, v_offset=0, t_scale=0, ac_couple=False, xy_mode=False, num_inputs=2, trig_mode=gr.gr_TRIG_MODE_AUTO, y_axis_label="Counts", ) self.Add(self.wxgui_scopesink2_0.win) self.gr_udp_source_0 = gr.udp_source(gr.sizeof_short*1, "192.168.2.200", 9997, 590, False, True) self.gr_short_to_float_0_0 = gr.short_to_float(1, 1) self.gr_short_to_float_0 = gr.short_to_float(1, 1) self.gr_file_sink_0_1_0 = gr.file_sink(gr.sizeof_short*1, "/home/cgardner/sandbox/gr-csg/gr-fp/grc_testfp/test_fp_odd.bin") self.gr_file_sink_0_1_0.set_unbuffered(True) self.gr_file_sink_0_1 = gr.file_sink(gr.sizeof_short*1, "/home/cgardner/sandbox/gr-csg/gr-fp/grc_testfp/test_raw_even.bin") self.gr_file_sink_0_1.set_unbuffered(True) self.gr_deinterleave_0 = gr.deinterleave(gr.sizeof_short*1) self.fpgnu_fpdata_sink_0 = fpgnu_swig.fpdata_sink(remove_head) ################################################## # Connections ################################################## self.connect((self.gr_udp_source_0, 0), (self.fpgnu_fpdata_sink_0, 0)) self.connect((self.gr_short_to_float_0, 0), (self.wxgui_scopesink2_0, 0)) self.connect((self.gr_deinterleave_0, 1), (self.gr_file_sink_0_1_0, 0)) self.connect((self.fpgnu_fpdata_sink_0, 0), (self.gr_deinterleave_0, 0)) self.connect((self.gr_deinterleave_0, 0), (self.gr_file_sink_0_1, 0)) self.connect((self.gr_short_to_float_0_0, 0), (self.wxgui_scopesink2_0, 1)) self.connect((self.gr_deinterleave_0, 1), (self.gr_short_to_float_0_0, 0)) self.connect((self.gr_deinterleave_0, 0), (self.gr_short_to_float_0, 0))
def __init__(self, options):
gr.top_block.__init__(self)
# Create a USRP source with GPIO FPGA build, then configure
u = usrp.source_s(decim_rate=options.decim,
fpga_filename=gpio.fpga_filename)
if options.force_complex_RXA:
# This is a dirty hack to force complex mode (receive both I and Q) on basicRX or LFRX
# This forces the receive board in RXA (side A) to be used
# FIXME: This has as a side effect that the gain for Q is not set. So only use with gain 0 (--gain 0)
options.rx_subdev_spec = (0, 0)
u.set_mux(0x10)
if not (0 == options.gain):
print "WARNING, you should set the gain to 0 with --gain 0 when using --force-complex-RXA"
print "The gain for Q will now still be zero while the gain for I is not"
#options.gain=0
else:
if options.rx_subdev_spec is None:
options.rx_subdev_spec = usrp.pick_rx_subdevice(u)
u.set_mux(usrp.determine_rx_mux_value(u, options.rx_subdev_spec))
subdev = usrp.selected_subdev(u, options.rx_subdev_spec)
print "Using RX d'board %s" % (subdev.side_and_name(), )
input_rate = u.adc_freq() / u.decim_rate()
print "USB sample rate %s" % (eng_notation.num_to_str(input_rate))
if options.gain is None:
# if no gain was specified, use the mid-point in dB
g = subdev.gain_range()
options.gain = float(g[0] + g[1]) / 2
#TODO setting gain on basicRX only sets the I channel, use a second subdev to set gain of Q channel
#see gnuradio-examples/multi-antenna for possible solutions
subdev.set_gain(options.gain)
#TODO check if freq has same problem as gain when trying to use complex mode on basicRX
r = u.tune(0, subdev, options.freq)
if not r:
sys.stderr.write('Failed to set frequency\n')
raise SystemExit, 1
# Connect pipeline
src = u
if options.nsamples is not None:
head = gr.head(gr.sizeof_short, int(options.nsamples) * 2)
self.connect(u, head)
src = head
ana_strip = gr.and_const_ss(0xFFFE)
dig_strip = gr.and_const_ss(0x0001)
ana_sink = gr.file_sink(gr.sizeof_short, options.ana_filename)
dig_sink = gr.file_sink(gr.sizeof_short, options.dig_filename)
self.connect(src, ana_strip, ana_sink)
self.connect(src, dig_strip, dig_sink)
def __init__(self): grc_wxgui.top_block_gui.__init__(self, title="Top Block") ################################################## # Variables ################################################## self.samp_rate = samp_rate = 25000000 self.dec_rate = dec_rate = 25 ################################################## # Blocks ################################################## self.wxgui_fftsink2_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=samp_rate/dec_rate, fft_size=1024, fft_rate=15, average=False, avg_alpha=None, title="FFT Plot", peak_hold=False, ) self.Add(self.wxgui_fftsink2_0.win) self.gr_unpacked_to_packed_xx_0 = gr.unpacked_to_packed_bb(1, gr.GR_MSB_FIRST) self.gr_throttle_0 = gr.throttle(gr.sizeof_gr_complex*1, samp_rate) self.gr_freq_xlating_fir_filter_xxx_0 = gr.freq_xlating_fir_filter_ccc(dec_rate, (firdes.low_pass(1,samp_rate,1000000,100000)), -1000000, samp_rate) self.gr_file_source_0 = gr.file_source(gr.sizeof_gr_complex*1, "/shampoo/sdr/capture/j9Pro-capture/2400000000-25M-1.cap", False) self.gr_file_sink_0_0 = gr.file_sink(gr.sizeof_char*1, "/shampoo/sdr/projects/gr-nineeagles/gmsk-packed.out") self.gr_file_sink_0_0.set_unbuffered(False) self.gr_file_sink_0 = gr.file_sink(gr.sizeof_char*1, "/shampoo/sdr/projects/gr-nineeagles/gmsk-unpacked.out") self.gr_file_sink_0.set_unbuffered(False) self.digital_gmsk_demod_0 = digital.gmsk_demod( samples_per_symbol=2, gain_mu=0.175, mu=0.5, omega_relative_limit=0.005, freq_error=0.0, verbose=False, log=False, ) ################################################## # Connections ################################################## self.connect((self.gr_file_source_0, 0), (self.gr_throttle_0, 0)) self.connect((self.gr_unpacked_to_packed_xx_0, 0), (self.gr_file_sink_0_0, 0)) self.connect((self.digital_gmsk_demod_0, 0), (self.gr_file_sink_0, 0)) self.connect((self.digital_gmsk_demod_0, 0), (self.gr_unpacked_to_packed_xx_0, 0)) self.connect((self.gr_freq_xlating_fir_filter_xxx_0, 0), (self.wxgui_fftsink2_0, 0)) self.connect((self.gr_throttle_0, 0), (self.gr_freq_xlating_fir_filter_xxx_0, 0)) self.connect((self.gr_freq_xlating_fir_filter_xxx_0, 0), (self.digital_gmsk_demod_0, 0))
def __init__(self, options):
gr.top_block.__init__(self)
# Create a USRP source with GPIO FPGA build, then configure
u = usrp.source_s(decim_rate=options.decim,fpga_filename=gpio.fpga_filename)
if options.force_complex_RXA:
# This is a dirty hack to force complex mode (receive both I and Q) on basicRX or LFRX
# This forces the receive board in RXA (side A) to be used
# FIXME: This has as a side effect that the gain for Q is not set. So only use with gain 0 (--gain 0)
options.rx_subdev_spec=(0,0)
u.set_mux(0x10)
if not (0==options.gain):
print "WARNING, you should set the gain to 0 with --gain 0 when using --force-complex-RXA"
print "The gain for Q will now still be zero while the gain for I is not"
#options.gain=0
else:
if options.rx_subdev_spec is None:
options.rx_subdev_spec = usrp.pick_rx_subdevice(u)
u.set_mux(usrp.determine_rx_mux_value(u, options.rx_subdev_spec))
subdev = usrp.selected_subdev(u, options.rx_subdev_spec)
print "Using RX d'board %s" % (subdev.side_and_name(),)
input_rate = u.adc_freq()/u.decim_rate()
print "USB sample rate %s" % (eng_notation.num_to_str(input_rate))
if options.gain is None:
# if no gain was specified, use the mid-point in dB
g = subdev.gain_range()
options.gain = float(g[0]+g[1])/2
#TODO setting gain on basicRX only sets the I channel, use a second subdev to set gain of Q channel
#see gnuradio-examples/multi-antenna for possible solutions
subdev.set_gain(options.gain)
#TODO check if freq has same problem as gain when trying to use complex mode on basicRX
r = u.tune(0, subdev, options.freq)
if not r:
sys.stderr.write('Failed to set frequency\n')
raise SystemExit, 1
# Connect pipeline
src = u
if options.nsamples is not None:
head = gr.head(gr.sizeof_short, int(options.nsamples)*2)
self.connect(u, head)
src = head
ana_strip = gpio.and_const_ss(0xFFFE)
dig_strip = gpio.and_const_ss(0x0001)
ana_sink = gr.file_sink(gr.sizeof_short, options.ana_filename)
dig_sink = gr.file_sink(gr.sizeof_short, options.dig_filename)
self.connect(src, ana_strip, ana_sink)
self.connect(src, dig_strip, dig_sink)
def _setup_logging(self):
print "Modulation logging turned on."
self.connect(self.B2s,
gr.file_sink(gr.sizeof_float, "symbols.dat"))
self.connect(self.pam,
gr.file_sink(gr.sizeof_float, "pam.dat"))
self.connect(self.filter,
gr.file_sink(gr.sizeof_float, "filter.dat"))
self.connect(self.fmmod,
gr.file_sink(gr.sizeof_gr_complex, "fmmod.dat"))
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 __init__(self, options):
gr.top_block.__init__(self)
if options.freq is not None:
u = usrp2.source(options)
elif options.infile is not None:
u = gr.file_source(gr.sizeof_gr_complex, options.infile)
else:
import sys
sys.stderr.write("--freq or --infile must be specified\n")
raise SystemExit
self.scope = None
if options.outfile is not None:
rx = gr.file_sink(gr.sizeof_gr_complex, options.outfile)
else:
rx = qam_rxtx.RX(options)
framebytes = rx.framebytes
if options.rxdata is not None:
if options.rxdata == '-':
self.connect(
rx,
gr.file_descriptor_sink(gr.sizeof_char * framebytes,
1))
else:
self.connect(
rx,
gr.file_sink(gr.sizeof_char * framebytes,
options.rxdata))
if options.berdata is not None:
# select one of the ber modes
ber = qam_rxtx.BER(framebytes, 100, mode=options.bermode)
data = qam_rxtx.make_data(framebytes)
self.connect(rx, (ber, 0))
self.connect(data, (ber, 1))
if options.berdata == '-':
# print it out
msgq = gr.msg_queue(16)
self.connect(ber,
gr.message_sink(gr.sizeof_float, msgq, True))
self.watcher = ofdm_rxtx.queue_watcher(msgq)
elif options.berdata == '.':
import scope
# scope it out
self.scope = scope.scope(self, ber, 'Frame BER')
else:
self.connect(
ber, gr.file_sink(gr.sizeof_float, options.berdata))
else:
pass
#self.connect(rx, gr.null_sink(symbol_size)) # XXX do we still need this?
self.connect(u, rx)
def __init__(self, *args, **kwargs):
"""
Hierarchical block for O-QPSK demodulation.
The input is the complex modulated signal at baseband
and the output is a stream of bytes.
@param sps: samples per symbol
@type sps: integer
"""
try:
self.sps = kwargs.pop('sps')
self.log = kwargs.pop('log')
except KeyError:
pass
gr.hier_block2.__init__(self, "ieee802_15_4_demod",
gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input
gr.io_signature(1, 1, gr.sizeof_float)) # Output
# Demodulate FM
sensitivity = (pi / 2) / self.sps
#self.fmdemod = gr.quadrature_demod_cf(1.0 / sensitivity)
self.fmdemod = gr.quadrature_demod_cf(1)
# Low pass the output of fmdemod to allow us to remove
# the DC offset resulting from frequency offset
alpha = 0.0008/self.sps
self.freq_offset = gr.single_pole_iir_filter_ff(alpha)
self.sub = gr.sub_ff()
self.connect(self, self.fmdemod)
self.connect(self.fmdemod, (self.sub, 0))
self.connect(self.fmdemod, self.freq_offset, (self.sub, 1))
# recover the clock
omega = self.sps
gain_mu=0.03
mu=0.5
omega_relative_limit=0.0002
freq_error=0.0
gain_omega = .25*gain_mu*gain_mu # critically damped
self.clock_recovery = digital.clock_recovery_mm_ff(omega, gain_omega, mu, gain_mu,
omega_relative_limit)
# Connect
self.connect(self.sub, self.clock_recovery, self)
if self.log:
self.connect(self.fmdemod, gr.file_sink(gr.sizeof_float, 'rx-fmdemod.dat'))
self.connect(self.freq_offset, gr.file_sink(gr.sizeof_float, 'rx-fo.dat'))
self.connect(self.sub, gr.file_sink(gr.sizeof_float, 'rx-sub.dat'))
self.connect(self.clock_recovery, gr.file_sink(gr.sizeof_float, 'rx-recovery.dat'))
def __init__(self,
N_id_2,
decim=16,
avg_halfframes=2 * 8,
freq_corr=0,
dump=None):
gr.hier_block2.__init__(
self,
"PSS correlator",
gr.io_signature(1, 1, gr.sizeof_gr_complex),
gr.io_signature(1, 1, gr.sizeof_float),
)
vec_half_frame = 30720 * 5 / decim
self.taps = []
for i in range(0, 3):
self.taps.append(
gen_pss_td(i, N_re=2048 / decim,
freq_corr=freq_corr).get_data_conj_rev())
self.corr = filter.fir_filter_ccc(1, self.taps[N_id_2])
self.mag = gr.complex_to_mag_squared()
self.vec = gr.stream_to_vector(gr.sizeof_float * 1, vec_half_frame)
self.deint = gr.deinterleave(gr.sizeof_float * vec_half_frame)
self.add = gr.add_vff(vec_half_frame)
self.argmax = gr.argmax_fs(vec_half_frame)
self.null = gr.null_sink(gr.sizeof_short * 1)
self.max = gr.max_ff(vec_half_frame)
self.to_float = gr.short_to_float(1, 1. / decim)
self.interleave = gr.interleave(gr.sizeof_float)
#self.framestart = gr.add_const_ii(-160-144*5-2048*6+30720*5)
self.connect(self, self.corr, self.mag, self.vec)
self.connect((self.argmax, 1), self.null)
#self.connect(self.argmax, self.to_float, self.to_int, self.framestart, self)
self.connect(self.argmax, self.to_float, self.interleave, self)
self.connect(self.max, (self.interleave, 1))
if avg_halfframes == 1:
self.connect(self.vec, self.argmax)
self.connect(self.vec, self.max)
else:
self.connect(self.vec, self.deint)
self.connect(self.add, self.argmax)
self.connect(self.add, self.max)
for i in range(0, avg_halfframes):
self.connect((self.deint, i), (self.add, i))
if dump != None:
self.connect(
self.mag,
gr.file_sink(gr.sizeof_float, dump + "_pss_corr_f.cfile"))
self.connect(
self.add,
gr.file_sink(gr.sizeof_float * vec_half_frame,
dump + "_pss_corr_add_f.cfile"))
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 __init__(self):
grc_wxgui.top_block_gui.__init__(self, title="Top Block")
_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 = 100000
##################################################
# Blocks
##################################################
self.wxgui_fftsink2_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=samp_rate*10,
fft_size=1024,
fft_rate=15,
average=False,
avg_alpha=None,
title="FFT Plot",
peak_hold=False,
)
self.Add(self.wxgui_fftsink2_0.win)
self.uhd_usrp_source_0 = uhd.usrp_source(
device_addr="addr0=192.168.10.2,addr1=192.168.10.3",
stream_args=uhd.stream_args(
cpu_format="fc32",
channels=range(2),
),
)
self.uhd_usrp_source_0.set_clock_source("mimo", 1)
self.uhd_usrp_source_0.set_time_source("mimo", 1)
self.uhd_usrp_source_0.set_samp_rate(samp_rate)
self.uhd_usrp_source_0.set_center_freq(4.9e9+20000, 0)
self.uhd_usrp_source_0.set_gain(15, 0)
self.uhd_usrp_source_0.set_center_freq(4.9e9+20000, 1)
self.uhd_usrp_source_0.set_gain(15, 1)
self.gr_file_sink_0_0 = gr.file_sink(gr.sizeof_gr_complex*1, "/home/sdruser/COLLINS/Pre/UChannel2_S.txt")
self.gr_file_sink_0_0.set_unbuffered(False)
self.gr_file_sink_0 = gr.file_sink(gr.sizeof_gr_complex*1, "/home/sdruser/COLLINS/Pre/UChannel1_S.txt")
self.gr_file_sink_0.set_unbuffered(False)
##################################################
# Connections
##################################################
self.connect((self.uhd_usrp_source_0, 0), (self.gr_file_sink_0, 0))
self.connect((self.uhd_usrp_source_0, 1), (self.gr_file_sink_0_0, 0))
self.connect((self.uhd_usrp_source_0, 1), (self.wxgui_fftsink2_0, 0))
def __init__(self):
gr.top_block.__init__(self)
xmtr_hack = True
rcvr_hack = True
self.options = self.run_parser()
self.transceiver = bts_transceiver.proto_transceiver()
if rcvr_hack:
self.src = gr.throttle(itemsize = gr.sizeof_gr_complex,
samples_per_sec = self.options.rx_samp_rate)
self.f_src = gr.file_source(
itemsize = gr.sizeof_gr_complex,
filename = self.options.test_src,
repeat = False)
self.connect(self.f_src, self.src)
else:
self.bb_sink = gr.file_sink(
itemsize = gr.sizeof_gr_complex,
filename = 'bb_dump.dat')
self.src = self.setup_src()
self.connect(
self.src,
self.bb_sink)
if xmtr_hack:
self.snk = gr.throttle(
itemsize = gr.sizeof_gr_complex,
samples_per_sec = self.options.tx_samp_rate)
self.fsnk = gr.file_sink(
itemsize = gr.sizeof_gr_complex,
filename = self.options.test_snk)
self.connect(
self.snk,
self.fsnk)
else:
self.snk = self.setup_snk()
self.fsnk = gr.file_sink(
itemsize = gr.sizeof_gr_complex,
filename = self.options.test_snk)
self.connect(
self.transceiver,
self.fsnk)
self.connect(
self.src,
self.transceiver)
self.connect(
self.transceiver,
self.snk)
#sleep for a bit, let the USRP clocks stablize and such
time.sleep(1)
def _setup_logging(self):
print("Modulation logging turned on.")
self.connect(self.C2S,
gr.file_sink(gr.sizeof_float, "tx_chunks2symbols.dat"))
self.connect(self.polarity,
gr.file_sink(gr.sizeof_float, "tx_polarity.dat"))
self.connect(self.filter, gr.file_sink(gr.sizeof_float,
"tx_filter.dat"))
if (self._decimation > 1):
self.connect(self.decimator,
gr.file_sink(gr.sizeof_float, "tx_decimator.dat"))
def _setup_logging(self):
print "Modulation logging turned on."
self.connect(self.bytes2chunks,
gr.file_sink(gr.sizeof_char, "bytes2chunks.dat"))
self.connect(self.symbol_mapper,
gr.file_sink(gr.sizeof_char, "graycoder.dat"))
self.connect(self.diffenc, gr.file_sink(gr.sizeof_char, "diffenc.dat"))
self.connect(self.chunks2symbols,
gr.file_sink(gr.sizeof_gr_complex, "chunks2symbols.dat"))
self.connect(self.rrc_filter,
gr.file_sink(gr.sizeof_gr_complex, "rrc_filter.dat"))
def __init__(self, u, center_freq, hw_dec_rate, downsample_rate, pulse_width, tari, debug_on, output_data):
gr.top_block.__init__(self)
# sample_rate = 100e6 / hw_dec_rate
sample_rate = 2e6
self.u = u
# self.u.set_decim(hw_dec_rate)
g = u.get_gain_range()
print "-----------"
self.u.set_gain(float(g.start() + g.stop()) / 4)
print "Using gain of", float(g.start() + g.stop()) / 4 , "(", g.stop(), "-", g.start(), ")"
tune_req = uhd.tune_request_t(center_freq,sample_rate)
# r = rx.set_center_freq(tune_req)
x = self.u.set_center_freq(tune_req)
if not x:
print "Couldn't set rx freq"
self.u.set_samp_rate(sample_rate)
us_per_sample = 1e6 / sample_rate * downsample_rate
print "USRP Sample Rate: "+ str(sample_rate) + " us Per Sample: " + str(us_per_sample)
# 25 Msps is too much to process. But we don't want to decimate at the USRP because we want the full band.
# We can downsample, because we don't care about aliasing.
self.downsample = gr.keep_one_in_n(gr.sizeof_gr_complex, int(downsample_rate))
self.to_mag = gr.complex_to_mag()
# For TARI = 24, PW == DELIM. So we can't do a matched filter, or everything becomes a delimiter and a zero.
# PW / 2 smooths reasonably well.
# self.smooth = gr.moving_average_ff(int(pulse_width / us_per_sample) /2 , int(pulse_width / us_per_sample) /2 )
self.smooth = gr.moving_average_ff(int(1), 1.0)
self.rd = rfid.reader_decoder(us_per_sample, tari)
if(debug_on):
# fileInfo = "_smooth1_b"
# time = strftime("%H_%M_%S", localtime())
# threshFileName = "rm_thresh_" + time + fileInfo + ".out"
# signalFileName = "rm_signal_" + time + fileInfo + ".out"
signalFileName = "rm_signal.out"
threshFileName = "rm_thresh.out"
self.sink = gr.file_sink(gr.sizeof_float, threshFileName)
# self.signal_sink = gr.file_sink(gr.sizeof_float, signalFileName)
# self.connect(self.smooth, self.signal_sink)
else:
self.sink = gr.null_sink(gr.sizeof_float)
self.connect(self.u, self.downsample, self.to_mag, self.smooth, self.rd, self.sink)
# Change to "gr.sizeof_gr_complex" if "block_x" is "rx"
file_rx_sink = gr.file_sink(gr.sizeof_gr_complex, output_data)
self.connect(self.u, file_rx_sink)
def __init__(self):
gr.top_block.__init__(self, "Top Block Ss R")
##################################################
# Variables
##################################################
self.samp_rate = samp_rate = 100000
##################################################
# Blocks
##################################################
self.uhd_usrp_source_0 = uhd.usrp_source(
device_addr="",
stream_args=uhd.stream_args(
cpu_format="fc32",
channels=range(1),
),
)
self.uhd_usrp_source_0.set_samp_rate(samp_rate)
self.uhd_usrp_source_0.set_center_freq(2.4e9, 0)
self.uhd_usrp_source_0.set_gain(25, 0)
self.gr_pll_carriertracking_cc_0 = gr.pll_carriertracking_cc(
1.5 * 3.1459 / 200, 4, -4)
self.gr_head_0 = gr.head(gr.sizeof_gr_complex * 1, 1000000)
self.gr_file_sink_0_0 = gr.file_sink(
gr.sizeof_float * 1, "/home/sdruser/COLLINS/SS/received_GMSK.txt")
self.gr_file_sink_0_0.set_unbuffered(False)
self.gr_file_sink_0 = gr.file_sink(
gr.sizeof_gr_complex * 1, "/home/sdruser/COLLINS/SS/received.txt")
self.gr_file_sink_0.set_unbuffered(False)
self.digital_gmsk_demod_0 = digital.gmsk_demod(
samples_per_symbol=2,
gain_mu=0.175,
mu=0.5,
omega_relative_limit=0.005,
freq_error=0.0,
verbose=False,
log=False,
)
##################################################
# Connections
##################################################
self.connect((self.gr_pll_carriertracking_cc_0, 0),
(self.gr_file_sink_0, 0))
self.connect((self.uhd_usrp_source_0, 0), (self.gr_head_0, 0))
self.connect((self.gr_head_0, 0),
(self.gr_pll_carriertracking_cc_0, 0))
self.connect((self.digital_gmsk_demod_0, 0),
(self.gr_file_sink_0_0, 0))
self.connect((self.gr_pll_carriertracking_cc_0, 0),
(self.digital_gmsk_demod_0, 0))
def _setup_logging(self):
print "Modulation logging turned on."
self.connect(self.C2S,
gr.file_sink(gr.sizeof_float, "tx_chunks2symbols.dat"))
self.connect(self.polarity,
gr.file_sink(gr.sizeof_float, "tx_polarity.dat"))
self.connect(self.rrc_filter,
gr.file_sink(gr.sizeof_float, "tx_rrc_filter.dat"))
self.connect(self.shaping_filter,
gr.file_sink(gr.sizeof_float, "tx_shaping_filter.dat"))
if (self._decimation > 1):
self.connect(self.decimator,
gr.file_sink(gr.sizeof_float, "tx_decimator.dat"))
def __init__(self, options, queue):
gr.top_block.__init__(self, "usrp_flex_all")
if options.from_file is not None:
src = gr.file_source(gr.sizeof_gr_complex, options.from_file)
if options.verbose:
print "Reading samples from file", options.from_file
else:
src = usrp.source_c()
if options.rx_subdev_spec is None:
options.rx_subdev_spec = usrp.pick_rx_subdevice(src)
subdev = usrp.selected_subdev(src, options.rx_subdev_spec)
src.set_mux(
usrp.determine_rx_mux_value(src, options.rx_subdev_spec))
src.set_decim_rate(20)
result = usrp.tune(src, 0, subdev,
930.5125e6 + options.calibration)
if options.verbose:
print "Using", subdev.name(), " for receiving."
print "Tuned USRP to", 930.5125e6 + options.calibration
taps = gr.firdes.low_pass(1.0, 1.0, 1.0 / 128.0 * 0.4,
1.0 / 128.0 * 0.1, gr.firdes.WIN_HANN)
if options.verbose:
print "Channel filter has", len(taps), "taps"
bank = blks2.analysis_filterbank(128, taps)
self.connect(src, bank)
if options.log and options.from_file == None:
src_sink = gr.file_sink(gr.sizeof_gr_complex, 'usrp.dat')
self.connect(src, src_sink)
for i in range(128):
if i < 64:
freq = 930.5e6 + i * 25e3
else:
freq = 928.9e6 + (i - 64) * 25e3
if (freq < 929.0e6 or freq > 932.0e6):
self.connect((bank, i), gr.null_sink(gr.sizeof_gr_complex))
else:
self.connect((bank, i),
pager.flex_demod(queue, freq, options.verbose,
options.log))
if options.log:
self.connect(
(bank, i),
gr.file_sink(gr.sizeof_gr_complex, 'chan_' + '%3.3f' %
(freq / 1e6) + '.dat'))
def _setup_logging(self):
print "Modulation logging turned on."
self.connect(self.bytes2chunks,
gr.file_sink(gr.sizeof_char, "tx_bytes2chunks.8b"))
if self._constellation.apply_pre_diff_code():
self.connect(self.symbol_mapper,
gr.file_sink(gr.sizeof_char, "tx_symbol_mapper.8b"))
if self._differential:
self.connect(self.diffenc,
gr.file_sink(gr.sizeof_char, "tx_diffenc.8b"))
self.connect(self.chunks2symbols,
gr.file_sink(gr.sizeof_gr_complex, "tx_chunks2symbols.32fc"))
self.connect(self.rrc_filter,
gr.file_sink(gr.sizeof_gr_complex, "tx_rrc_filter.32fc"))
def build_graph(input, output, acq_coeffs, sync_coeffs, sync_thresh, sync_window):
# Initialize our top block
fg = gr.top_block()
# Source is a file
src = gr.file_source (gr.sizeof_gr_complex, input)
# Read coefficients for the acquisition filter (FIR filter)
dfile = open(acq_coeffs, 'r')
data = []
for line in dfile:
data.append(complex(*map(float,line.strip().strip("()").split(" "))).conjugate())
dfile.close()
data.reverse()
mfilter = gr.fir_filter_ccc(1, data) # Our matched filter!
# Read coefficients for the sync block
dfile = open(sync_coeffs, 'r')
data = []
for line in dfile:
data.append(complex(*map(float,line.strip().strip("()").split(" "))).conjugate())
dfile.close()
sync = cmusdrg.mf_sync_ccf(data) # Sync block!
# Delay component, to sync the original complex with MF output
delay = gr.delay(gr.sizeof_gr_complex, len(data)-1)
# Acquisition filter with threshold and window
acq = cmusdrg.acquisition_filter_ccc(sync_thresh, sync_window)
# Connect complex input to matched filter and delay
fg.connect(src, mfilter)
fg.connect(src, delay)
# Connect the mfilter and delay to the acquisition filter
fg.connect(mfilter, (acq, 0))
fg.connect(delay, (acq, 1))
# Connect the acquisition filter to the sync block
fg.connect((acq, 0), (sync, 0))
fg.connect((acq, 1), (sync, 1))
# Two file sinks for the output
fsink = gr.file_sink (gr.sizeof_char, output+"_sync")
fsink2 = gr.file_sink (gr.sizeof_gr_complex, output+"_acq")
fg.connect((acq,0), fsink2)
fg.connect(sync, fsink)
return fg
def _setup_logging(self):
print "Modulation logging turned on."
self.connect(self.bytes2chunks,
gr.file_sink(gr.sizeof_char, "tx_bytes2chunks.8b"))
if self._constellation.apply_pre_diff_code():
self.connect(self.symbol_mapper,
gr.file_sink(gr.sizeof_char, "tx_symbol_mapper.8b"))
if self._differential:
self.connect(self.diffenc,
gr.file_sink(gr.sizeof_char, "tx_diffenc.8b"))
self.connect(
self.chunks2symbols,
gr.file_sink(gr.sizeof_gr_complex, "tx_chunks2symbols.32fc"))
self.connect(self.rrc_filter,
gr.file_sink(gr.sizeof_gr_complex, "tx_rrc_filter.32fc"))
def graph(args):
print os.getpid()
nargs = len(args)
if nargs == 1:
infile = args[0]
else:
sys.stderr.write('usage: interp.py input_file\n')
sys.exit(1)
tb = gr.top_block()
srcf = gr.file_source(gr.sizeof_short, infile)
s2ss = gr.stream_to_streams(gr.sizeof_short, 2)
s2f1 = gr.short_to_float()
s2f2 = gr.short_to_float()
src0 = gr.float_to_complex()
lp_coeffs = gr.firdes.low_pass(3, 19.2e6, 3.2e6, .5e6,
gr.firdes.WIN_HAMMING)
lp = gr.interp_fir_filter_ccf(3, lp_coeffs)
file = gr.file_sink(gr.sizeof_gr_complex, "/tmp/atsc_pipe_1")
tb.connect(srcf, s2ss)
tb.connect((s2ss, 0), s2f1, (src0, 0))
tb.connect((s2ss, 1), s2f2, (src0, 1))
tb.connect(src0, lp, file)
tb.start()
raw_input('Head End: Press Enter to stop')
tb.stop()
def main():
parser = OptionParser(conflict_handler="resolve")
expert_grp = parser.add_option_group("Expert")
add_options(parser, expert_grp)
(options, args) = parser.parse_args()
fft_length = options.fft_length or 512
file = options.file or "input.compl"
out = options.out or "output.compl"
src = gr.file_source(gr.sizeof_gr_complex, file)
sampler = ofdm.vector_sampler(gr.sizeof_gr_complex, fft_length)
trig = gr.vector_source_b([1], True)
fft = gr.fft_vcc(fft_length, True, [], True)
mag = gr.complex_to_mag(fft_length)
avg = gr.single_pole_iir_filter_ff(0.01, fft_length)
nlog = gr.nlog10_ff(20, fft_length, -10 * math.log10(fft_length))
dst = gr.file_sink(gr.sizeof_float * fft_length, out)
fg = gr.top_block()
fg.connect(src, sampler, fft, mag, avg, nlog, dst)
fg.connect(trig, (sampler, 1))
# fg.connect(src,limit,
# gr.stream_to_vector(gr.sizeof_gr_complex,fft_length),
# fft,
# gr.multiply_const_vcc([1./fft_length]*fft_length),
# gr.complex_to_mag(fft_length),
# gr.nlog10_ff(10.0,fft_length),
# dst)
# fg.connect( src, fft, dst )
fg.run()
print "done"
def __set_rx_from_usrp(self, subdev_spec, decimation_rate, gain, frequency,
preserve):
from gnuradio import usrp
# setup USRP
self.usrp.set_decim_rate(decimation_rate)
if subdev_spec is None:
subdev_spec = usrp.pick_rx_subdevice(self.usrp)
self.usrp.set_mux(usrp.determine_rx_mux_value(self.usrp, subdev_spec))
subdev = usrp.selected_subdev(self.usrp, subdev_spec)
capture_rate = self.usrp.adc_freq() / self.usrp.decim_rate()
self.info["capture-rate"] = capture_rate
if gain is None:
g = subdev.gain_range()
gain = float(g[0] + g[1]) / 2
subdev.set_gain(gain)
r = self.usrp.tune(0, subdev, frequency)
if not r:
raise RuntimeError("failed to set USRP frequency")
# capture file
if preserve:
try:
self.capture_filename = os.tmpnam()
except RuntimeWarning:
ignore = True
capture_file = gr.file_sink(gr.sizeof_gr_complex,
self.capture_filename)
self.__connect([[self.usrp, capture_file]])
else:
self.capture_filename = None
# everything else
self.__build_graph(self.usrp, capture_rate)
def __init__(self, ifile, ofile, options):
gr.top_block.__init__(self)
SNR = 10.0**(options.snr / 10.0)
time_offset = options.time_offset
phase_offset = options.phase_offset * (math.pi / 180.0)
# calculate noise voltage from SNR
power_in_signal = abs(options.tx_amplitude)**2
noise_power = power_in_signal / SNR
noise_voltage = math.sqrt(noise_power)
print "Noise voltage: ", noise_voltage
frequency_offset = options.frequency_offset / options.fft_length
self.src = gr.file_source(gr.sizeof_gr_complex, ifile)
#self.throttle = gr.throttle(gr.sizeof_gr_complex, options.sample_rate)
self.channel = gr.channel_model(noise_voltage,
frequency_offset,
time_offset,
noise_seed=-random.randint(0, 100000))
self.phase = gr.multiply_const_cc(
complex(math.cos(phase_offset), math.sin(phase_offset)))
self.snk = gr.file_sink(gr.sizeof_gr_complex, ofile)
self.connect(self.src, self.channel, self.phase, self.snk)
def __init__(self, modulator, options):
gr.top_block.__init__(self)
if (options.tx_freq is not None):
# Work-around to get the modulation's bits_per_symbol
args = modulator.extract_kwargs_from_options(options)
symbol_rate = options.bitrate / modulator(**args).bits_per_symbol()
self.sink = uhd_transmitter(options.args, symbol_rate,
options.samples_per_symbol,
options.tx_freq, options.tx_gain,
options.spec, options.antenna,
options.verbose)
options.samples_per_symbol = self.sink._sps
elif (options.to_file is not None):
sys.stderr.write(
("Saving samples to '%s'.\n\n" % (options.to_file)))
self.sink = gr.file_sink(gr.sizeof_gr_complex, options.to_file)
else:
sys.stderr.write(
"No sink defined, dumping samples to null sink.\n\n")
self.sink = gr.null_sink(gr.sizeof_gr_complex)
# do this after for any adjustments to the options that may
# occur in the sinks (specifically the UHD sink)
self.txpath = transmit_path(modulator, options)
self.connect(self.txpath, self.sink)
def __init__(self, host, port, pkt_size, eof, wait):
gr.top_block.__init__(self, "vector_sink")
udp = gr.udp_source(gr.sizeof_float, host, port, pkt_size,
eof=eof, wait=wait)
sink = gr.file_sink(gr.sizeof_float, "received.dat")
self.connect(udp, sink)