def __init__ ( self, noise_power, coherence_time, taps ):
gr.hier_block2.__init__(self,
"fading_channel",
gr.io_signature( 1, 1, gr.sizeof_gr_complex ),
gr.io_signature( 1, 1, gr.sizeof_gr_complex ) )
inp = gr.kludge_copy( gr.sizeof_gr_complex )
self.connect( self, inp )
tap1_delay = gr.delay( gr.sizeof_gr_complex, 1 )
tap2_delay = gr.delay( gr.sizeof_gr_complex, 2 )
self.connect( inp, tap1_delay )
self.connect( inp, tap2_delay )
fd = 100
z = numpy.arange(-fd+0.1,fd,0.1)
t = numpy.sqrt(1. / ( pi * fd * numpy.sqrt( 1. - (z/fd)**2 ) ) )
tap1_noise = ofdm.complex_white_noise( 0.0, taps[0] )
tap1_filter = gr.fft_filter_ccc(1, t)
self.connect( tap1_noise, tap1_filter )
tap1_mult = gr.multiply_cc()
self.connect( tap1_filter, (tap1_mult,0) )
self.connect( tap1_delay, (tap1_mult,1) )
tap2_noise = ofdm.complex_white_noise( 0.0, taps[1] )
tap2_filter = gr.fft_filter_ccc(1, t)
self.connect( tap2_noise, tap2_filter )
tap2_mult = gr.multiply_cc()
self.connect( tap2_filter, (tap2_mult,0) )
self.connect( tap2_delay, (tap2_mult,1) )
noise_src = ofdm.complex_white_noise( 0.0, sqrt( noise_power ) )
chan = gr.add_cc()
self.connect( inp, (chan,0) )
self.connect( tap1_mult, (chan,1) )
self.connect( tap2_mult, (chan,2) )
self.connect( noise_src, (chan,3) )
self.connect( chan, self )
log_to_file( self, tap1_filter, "data/tap1_filter.compl")
log_to_file( self, tap1_filter, "data/tap1_filter.float", mag=True)
log_to_file( self, tap2_filter, "data/tap2_filter.compl")
log_to_file( self, tap2_filter, "data/tap2_filter.float", mag=True)
def __init__(self, noise_power, coherence_time, taps):
gr.hier_block2.__init__(self, "fading_channel",
gr.io_signature(1, 1, gr.sizeof_gr_complex),
gr.io_signature(1, 1, gr.sizeof_gr_complex))
inp = gr.kludge_copy(gr.sizeof_gr_complex)
self.connect(self, inp)
tap1_delay = gr.delay(gr.sizeof_gr_complex, 1)
tap2_delay = gr.delay(gr.sizeof_gr_complex, 2)
self.connect(inp, tap1_delay)
self.connect(inp, tap2_delay)
fd = 100
z = numpy.arange(-fd + 0.1, fd, 0.1)
t = numpy.sqrt(1. / (pi * fd * numpy.sqrt(1. - (z / fd)**2)))
tap1_noise = ofdm.complex_white_noise(0.0, taps[0])
tap1_filter = gr.fft_filter_ccc(1, t)
self.connect(tap1_noise, tap1_filter)
tap1_mult = gr.multiply_cc()
self.connect(tap1_filter, (tap1_mult, 0))
self.connect(tap1_delay, (tap1_mult, 1))
tap2_noise = ofdm.complex_white_noise(0.0, taps[1])
tap2_filter = gr.fft_filter_ccc(1, t)
self.connect(tap2_noise, tap2_filter)
tap2_mult = gr.multiply_cc()
self.connect(tap2_filter, (tap2_mult, 0))
self.connect(tap2_delay, (tap2_mult, 1))
noise_src = ofdm.complex_white_noise(0.0, sqrt(noise_power))
chan = gr.add_cc()
self.connect(inp, (chan, 0))
self.connect(tap1_mult, (chan, 1))
self.connect(tap2_mult, (chan, 2))
self.connect(noise_src, (chan, 3))
self.connect(chan, self)
log_to_file(self, tap1_filter, "data/tap1_filter.compl")
log_to_file(self, tap1_filter, "data/tap1_filter.float", mag=True)
log_to_file(self, tap2_filter, "data/tap2_filter.compl")
log_to_file(self, tap2_filter, "data/tap2_filter.float", mag=True)
def test_100(self):
vlen = 256
N = int( 5e5 )
soff=40
taps = [1.0,0.0,2e-1+0.1j,1e-4-0.04j]
freqoff = 0.0
snr_db = 10
rms_amplitude = 8000
data = [1 + 1j] * vlen
#data2 = [2] * vlen
src = gr.vector_source_c( data, True, vlen )
v2s = gr.vector_to_stream(gr.sizeof_gr_complex,vlen)
#interp = gr.fractional_interpolator_cc(0.0,soff)
interp = moms(1000000,1000000+soff)
fad_chan = gr.fir_filter_ccc(1,taps)
freq_shift = gr.multiply_cc()
norm_freq = freqoff / vlen
freq_off_src = gr.sig_source_c(1.0, gr.GR_SIN_WAVE, norm_freq, 1.0, 0.0 )
snr = 10.0**(snr_db/10.0)
noise_sigma = sqrt( rms_amplitude**2 / snr)
awgn_chan = gr.add_cc()
awgn_noise_src = ofdm.complex_white_noise( 0.0, noise_sigma )
dst = gr.null_sink( gr.sizeof_gr_complex )
limit = gr.head( gr.sizeof_gr_complex * vlen, N )
self.tb.connect( src, limit, v2s, interp, fad_chan,freq_shift, awgn_chan, dst )
self.tb.connect( freq_off_src,(freq_shift,1))
self.tb.connect( awgn_noise_src,(awgn_chan,1))
r = time_it( self.tb )
print "Rate: %s Samples/second" \
% eng_notation.num_to_str( float(N) * vlen / r )
def sim ( self, arity, snr_db, N ):
vlen = 1
N = int( N )
snr = 10.0**(snr_db/10.0)
sigpow = 1.0
noise_pow = sigpow / snr
demapper = ofdm.generic_demapper_vcb( vlen )
const = demapper.get_constellation( arity )
assert( len( const ) == 2**arity )
symsrc = ofdm.symbol_random_src( const, vlen )
noise_src = ofdm.complex_white_noise( 0.0, sqrt( noise_pow ) )
channel = blocks.add_cc()
bitmap_src = blocks.vector_source_b( [arity] * vlen, True, vlen )
bm_trig_src = blocks.vector_source_b( [1], True )
ref_bitstream = blocks.unpack_k_bits_bb( arity )
bitstream_xor = blocks.xor_bb()
bitstream_c2f = blocks.char_to_float()
acc_biterr = ofdm.accumulator_ff()
skiphead = blocks.skiphead( gr.sizeof_float, N-1 )
limit = blocks.head( gr.sizeof_float, 1 )
dst = blocks.vector_sink_f()
tb = gr.top_block ( "test_block" )
tb.connect( (symsrc,0), (channel,0) )
tb.connect( noise_src, (channel,1) )
tb.connect( channel, (demapper,0), (bitstream_xor,0) )
tb.connect( bitmap_src, (demapper,1) )
tb.connect( bm_trig_src, (demapper,2) )
tb.connect( (symsrc,1), ref_bitstream, (bitstream_xor,1) )
tb.connect( bitstream_xor, bitstream_c2f, acc_biterr )
tb.connect( acc_biterr, skiphead, limit, dst )
tb.run()
bit_errors = numpy.array( dst.data() )
assert( len( bit_errors ) == 1 )
bit_errors = bit_errors[0]
return bit_errors / N
def test_100(self):
vlen = 256
N = int(5e5)
soff = 40
taps = [1.0, 0.0, 2e-1 + 0.1j, 1e-4 - 0.04j]
freqoff = 0.0
snr_db = 10
rms_amplitude = 8000
data = [1 + 1j] * vlen
#data2 = [2] * vlen
src = gr.vector_source_c(data, True, vlen)
v2s = gr.vector_to_stream(gr.sizeof_gr_complex, vlen)
#interp = gr.fractional_interpolator_cc(0.0,soff)
interp = moms(1000000, 1000000 + soff)
fad_chan = gr.fir_filter_ccc(1, taps)
freq_shift = gr.multiply_cc()
norm_freq = freqoff / vlen
freq_off_src = gr.sig_source_c(1.0, gr.GR_SIN_WAVE, norm_freq, 1.0,
0.0)
snr = 10.0**(snr_db / 10.0)
noise_sigma = sqrt(rms_amplitude**2 / snr)
awgn_chan = gr.add_cc()
awgn_noise_src = ofdm.complex_white_noise(0.0, noise_sigma)
dst = gr.null_sink(gr.sizeof_gr_complex)
limit = gr.head(gr.sizeof_gr_complex * vlen, N)
self.tb.connect(src, limit, v2s, interp, fad_chan, freq_shift,
awgn_chan, dst)
self.tb.connect(freq_off_src, (freq_shift, 1))
self.tb.connect(awgn_noise_src, (awgn_chan, 1))
r = time_it(self.tb)
print "Rate: %s Samples/second" \
% eng_notation.num_to_str( float(N) * vlen / r )
def __init__( self, snr_db, sigpow = 1.0, vlen = 1 ):
gr.hier_block2.__init__( self,
"awgn_channel",
gr.io_signature( 1, 1, gr.sizeof_gr_complex * vlen ),
gr.io_signature( 1, 1, gr.sizeof_gr_complex * vlen ) )
snr = 10.0**(snr_db/10.0)
noise_pow = float(sigpow) / snr
noise_src = ofdm.complex_white_noise( 0.0, sqrt( noise_pow ) )
if vlen > 1:
channel = gr.add_vcc( vlen )
else:
channel = gr.add_cc()
self.connect( self, channel, self )
if vlen > 1:
self.connect( noise_src, gr.stream_to_vector( gr.sizeof_gr_complex, vlen),
( channel, 1) )
else:
self.connect( noise_src, ( channel, 1 ) )
def __init__(self, options):
gr.top_block.__init__(self, "ofdm_tx")
self._tx_freq = options.tx_freq # tranmitter's center frequency
self._tx_subdev_spec = options.tx_subdev_spec # daughterboard to use
self._fusb_block_size = options.fusb_block_size # usb info for USRP
self._fusb_nblocks = options.fusb_nblocks # usb info for USRP
self._which = options.which_usrp
self._bandwidth = options.bandwidth
self.servants = []
self._interface = options.interface
self._mac_addr = options.mac_addr
self._options = copy.copy(options)
self._interpolation = 1
f1 = numpy.array([
-107, 0, 445, 0, -1271, 0, 2959, 0, -6107, 0, 11953, 0, -24706, 0,
82359, 262144 / 2, 82359, 0, -24706, 0, 11953, 0, -6107, 0, 2959,
0, -1271, 0, 445, 0, -107
], numpy.float64) / 262144.
print "Software interpolation: %d" % (self._interpolation)
bw = 0.5 / self._interpolation
tb = bw / 5
if self._interpolation > 1:
self.filter = gr.hier_block2(
"filter", gr.io_signature(1, 1, gr.sizeof_gr_complex),
gr.io_signature(1, 1, gr.sizeof_gr_complex))
self.filter.connect(self.filter, gr.interp_fir_filter_ccf(2, f1),
gr.interp_fir_filter_ccf(2, f1), self.filter)
print "New"
#
#
# self.filt_coeff = optfir.low_pass(1.0, 1.0, bw, bw+tb, 0.2, 60.0, 0)
# self.filter = gr.interp_fir_filter_ccf(self._interpolation,self.filt_coeff)
# print "Software interpolation filter length: %d" % (len(self.filt_coeff))
else:
self.filter = None
if not options.from_file is None:
# sent captured file to usrp
self.src = gr.file_source(gr.sizeof_gr_complex, options.from_file)
self._setup_usrp_sink()
if hasattr(self, "filter"):
self.connect(self.src, self.filter, self.u) #,self.filter
else:
self.connect(self.src, self.u)
return
self._setup_tx_path(options)
config = station_configuration()
self.enable_info_tx("info_tx", "pa_user")
# if not options.no_cheat:
# self.txpath.enable_channel_cheating("channelcheat")
self.txpath.enable_txpower_adjust("txpower")
self.txpath.publish_txpower("txpower_info")
#self.enable_txfreq_adjust("txfreq")
if options.nullsink:
self.dst = gr.null_sink(gr.sizeof_gr_complex)
self.dst_2 = gr.null_sink(gr.sizeof_gr_complex)
else:
if not options.to_file is None:
# capture transmitter's stream to disk
self.dst = gr.file_sink(gr.sizeof_gr_complex, options.to_file)
self.dst_2 = gr.file_sink(gr.sizeof_gr_complex,
options.to_file)
tmp = gr.throttle(gr.sizeof_gr_complex, 1e5)
tmp_2 = gr.throttle(gr.sizeof_gr_complex, 1e5)
self.connect(tmp, self.dst)
self.connect(tmp_2, self.dst_2)
self.dst = tmp
self.dst_2 = tmp_2
if options.force_filter:
print "Forcing filter usage"
self.connect(self.filter, self.dst)
self.dst = self.filter
else:
# connect transmitter to usrp
self._setup_usrp_sink()
if options.dyn_freq:
self.enable_txfreq_adjust("txfreq")
if self.filter is not None:
self.connect(self.filter, self.dst)
self.dst = self.filter
if options.record:
log_to_file(self, self.txpath, "data/txpath_out.compl")
#self.publish_spectrum( 256 )
if options.measure:
self.m = throughput_measure(gr.sizeof_gr_complex)
self.connect(self.m, self.dst)
self.dst = self.m
if options.samplingoffset is not None:
soff = options.samplingoffset
interp = gr.fractional_interpolator_cc(0.0, soff)
self.connect(interp, self.dst)
self.dst = interp
if options.snr is not None:
# if options.berm is not None:
# noise_sigma = 380 #empirically given, gives the received SNR range of (1:28) for tx amp. range of (500:10000) which is set in rm_ber_measurement.py
# #check for fading channel
# else:
snr_db = options.snr
snr = 10.0**(snr_db / 10.0)
noise_sigma = sqrt(config.rms_amplitude**2 / snr)
print " Noise St. Dev. %d" % (noise_sigma)
awgn_chan = gr.add_cc()
awgn_noise_src = ofdm.complex_white_noise(0.0, noise_sigma)
self.connect(awgn_noise_src, (awgn_chan, 1))
self.connect(awgn_chan, self.dst)
self.dst = awgn_chan
if options.berm is False:
fad_chan = itpp.tdl_channel() #[0, -7, -20], [0, 2, 6]
#fad_chan.set_norm_doppler( 1e-9 )
#fad_chan.set_LOS( [500.,0,0] )
fad_chan.set_channel_profile(itpp.ITU_Pedestrian_A, 5e-8)
fad_chan.set_norm_doppler(1e-8)
# fad_chan = gr.fir_filter_ccc(1,[1.0,0.0,2e-1+0.1j,1e-4-0.04j])
self.connect(fad_chan, self.dst)
self.dst = fad_chan
if options.freqoff is not None:
freq_shift = gr.multiply_cc()
norm_freq = options.freqoff / config.fft_length
freq_off_src = gr.sig_source_c(1.0, gr.GR_SIN_WAVE, norm_freq, 1.0,
0.0)
self.connect(freq_off_src, (freq_shift, 1))
dst = self.dst
self.connect(freq_shift, dst)
self.dst = freq_shift
self.connect((self.txpath, 0), self.dst)
self.connect((self.txpath, 1), self.dst_2)
if options.cheat:
self.txpath.enable_channel_cheating("channelcheat")
print "Hit Strg^C to terminate"
def __init__ (self, options):
gr.top_block.__init__(self, "ofdm_benchmark")
##self._tx_freq = options.tx_freq # tranmitter's center frequency
##self._tx_subdev_spec = options.tx_subdev_spec # daughterboard to use
##self._fusb_block_size = options.fusb_block_size # usb info for USRP
##self._fusb_nblocks = options.fusb_nblocks # usb info for USRP
##self._which = options.which_usrp
self._bandwidth = options.bandwidth
self.servants = []
self._verbose = options.verbose
##self._interface = options.interface
##self._mac_addr = options.mac_addr
self._options = copy.copy( options )
self._interpolation = 1
f1 = numpy.array([-107,0,445,0,-1271,0,2959,0,-6107,0,11953,
0,-24706,0,82359,262144/2,82359,0,-24706,0,
11953,0,-6107,0,2959,0,-1271,0,445,0,-107],
numpy.float64)/262144.
print "Software interpolation: %d" % (self._interpolation)
bw = 1.0/self._interpolation
tb = bw/5
if self._interpolation > 1:
self.tx_filter = gr.hier_block2("filter",
gr.io_signature(1,1,gr.sizeof_gr_complex),
gr.io_signature(1,1,gr.sizeof_gr_complex))
self.tx_filter2 = gr.hier_block2("filter",
gr.io_signature(1,1,gr.sizeof_gr_complex),
gr.io_signature(1,1,gr.sizeof_gr_complex))
self.tx_filter.connect( self.tx_filter, gr.interp_fir_filter_ccf(2,f1),
gr.interp_fir_filter_ccf(2,f1), self.tx_filter )
self.tx_filter2.connect( self.tx_filter2, gr.interp_fir_filter_ccf(2,f1),
gr.interp_fir_filter_ccf(2,f1), self.tx_filter2 )
print "New"
else:
self.tx_filter = None
self.tx_filter2 = None
self.decimation = 1
if self.decimation > 1:
bw = 0.5/self.decimation * 1
tb = bw/5
# gain, sampling rate, passband cutoff, stopband cutoff
# passband ripple in dB, stopband attenuation in dB
# extra taps
filt_coeff = optfir.low_pass(1.0, 1.0, bw, bw+tb, 0.1, 60.0, 1)
print "Software decimation filter length: %d" % (len(filt_coeff))
self.rx_filter = gr.fir_filter_ccf(self.decimation,filt_coeff)
self.rx_filter2 = gr.fir_filter_ccf(self.decimation,filt_coeff)
else:
self.rx_filter = None
self.rx_filter2 = None
## if not options.from_file is None:
## # sent captured file to usrp
## self.src = gr.file_source(gr.sizeof_gr_complex,options.from_file)
## self._setup_usrp_sink()
## if hasattr(self, "filter"):
## self.connect(self.src,self.filter,self.u) #,self.filter
## else:
## self.connect(self.src,self.u)
##
## return
self._setup_tx_path(options)
self._setup_rx_path(options)
config = station_configuration()
self.enable_info_tx("info_tx", "pa_user")
# if not options.no_cheat:
# self.txpath.enable_channel_cheating("channelcheat")
self.txpath.enable_txpower_adjust("txpower")
self.txpath.publish_txpower("txpower_info")
if options.disable_equalization or options.ideal:
#print "CHANGE set_k"
self.rxpath.enable_estim_power_adjust("estim_power")
#self.rxpath.publish_estim_power("txpower_info")
#self.enable_txfreq_adjust("txfreq")
if options.imgxfer:
self.rxpath.setup_imgtransfer_sink()
if not options.no_decoding:
self.rxpath.publish_rx_performance_measure()
self.dst = (self.rxpath,0)
self.dst2 = (self.rxpath,1)
if options.force_rx_filter:
print "Forcing rx filter usage"
self.connect( self.rx_filter, self.dst )
self.connect( self.rx_filter2, self.dst2 )
self.dst = self.rx_filter
self.dst2 = self.rx_filter2
if options.measure:
self.m = throughput_measure(gr.sizeof_gr_complex)
self.m2 = throughput_measure(gr.sizeof_gr_complex)
self.connect( self.m, self.dst )
self.connect( self.m2, self.dst2 )
self.dst = self.m
self.dst2 = self.m2
if options.snr is not None:
if options.berm is not False:
noise_sigma = 380 #empirically given, gives the received SNR range of (1:28) for tx amp. range of (500:10000) which is set in rm_ber_measurement.py
#check for fading channel
else:
snr_db = options.snr
snr = 10.0**(snr_db/10.0)
noise_sigma = sqrt( config.rms_amplitude**2 / snr )
print " Noise St. Dev. %d" % (noise_sigma)
awgn_chan = blocks.add_cc()
awgn_chan2 = blocks.add_cc()
awgn_noise_src = ofdm.complex_white_noise( 0.0, noise_sigma )
awgn_noise_src2 = ofdm.complex_white_noise( 0.0, noise_sigma )
self.connect( awgn_chan, self.dst )
self.connect( awgn_chan2, self.dst2 )
self.connect( awgn_noise_src, (awgn_chan,1) )
self.connect( awgn_noise_src2, (awgn_chan2,1) )
self.dst = awgn_chan
self.dst2 = awgn_chan2
if options.freqoff is not None:
freq_shift = blocks.multiply_cc()
freq_shift2 = blocks.multiply_cc()
norm_freq = options.freqoff / config.fft_length
freq_off_src = analog.sig_source_c(1.0, analog.GR_SIN_WAVE, norm_freq, 1.0, 0.0 )
freq_off_src2 = analog.sig_source_c(1.0, analog.GR_SIN_WAVE, norm_freq, 1.0, 0.0 )
self.connect( freq_off_src, ( freq_shift, 1 ) )
self.connect( freq_off_src2, ( freq_shift2, 1 ) )
dst = self.dst
dst2 = self.dst2
self.connect( freq_shift, dst )
self.connect( freq_shift2, dst2 )
self.dst = freq_shift
self.dst2 = freq_shift2
if options.multipath:
if options.itu_channel:
fad_chan = itpp.tdl_channel( ) #[0, -7, -20], [0, 2, 6]
#fad_chan.set_norm_doppler( 1e-9 )
#fad_chan.set_LOS( [500.,0,0] )
fad_chan2 = itpp.tdl_channel( )
fad_chan.set_channel_profile( itpp.ITU_Pedestrian_A, 5e-8 )
fad_chan.set_norm_doppler( 1e-8 )
fad_chan2.set_channel_profile( itpp.ITU_Pedestrian_A, 5e-8 )
fad_chan2.set_norm_doppler( 1e-8 )
else:
fad_chan = gr.fir_filter_ccc(1,[1.0,0.0,2e-1+0.1j,1e-4-0.04j])
fad_chan2 = gr.fir_filter_ccc(1,[1.0,0.0,2e-1+0.1j,1e-4-0.04j])
self.connect( fad_chan, self.dst )
self.connect( fad_chan2, self.dst2 )
self.dst = fad_chan
self.dst2 = fad_chan2
if options.samplingoffset is not None:
soff = options.samplingoffset
interp = moms(1000000+soff,1000000)
interp2 = moms(1000000+soff,1000000)
self.connect( interp, self.dst )
self.connect( interp2, self.dst2 )
self.dst = interp
self.dst2 = interp2
if options.record:
log_to_file( self, interp, "data/interp_out.compl" )
log_to_file( self, interp2, "data/interp2_out.compl" )
tmm =blocks.throttle(gr.sizeof_gr_complex,self._bandwidth)
tmm2 =blocks.throttle(gr.sizeof_gr_complex,self._bandwidth)
tmm_add = blocks.add_cc()
tmm2_add = blocks.add_cc()
self.connect( tmm, tmm_add )
self.connect( tmm2, (tmm_add,1) )
self.connect( tmm, tmm2_add )
self.connect( tmm2, (tmm2_add,1) )
self.connect( tmm_add, self.dst )
self.connect( tmm2_add, self.dst2 )
self.dst = tmm
self.dst2 = tmm2
inter = blocks.interleave(gr.sizeof_gr_complex)
deinter = blocks.deinterleave(gr.sizeof_gr_complex)
self.connect(inter, deinter)
self.connect((deinter,0),self.dst)
self.connect((deinter,1),self.dst2)
self.dst = inter
self.dst2 = (inter,1)
if options.force_tx_filter:
print "Forcing tx filter usage"
self.connect( self.tx_filter, self.dst )
self.connect( self.tx_filter2, self.dst2 )
self.dst = self.tx_filter
self.dst2 = self.tx_filter2
if options.record:
log_to_file( self, self.txpath, "data/txpath_out.compl" )
log_to_file( self, self.txpath2, "data/txpath2_out.compl" )
if options.nullsink:
self.connect(gr.null_source(gr.sizeof_gr_complex), self.dst)
self.connect(gr.null_source(gr.sizeof_gr_complex), self.dst2)
self.dst = gr.null_sink(gr.sizeof_gr_complex)
self.dst2 = gr.null_sink(gr.sizeof_gr_complex)
self.connect( self.txpath,self.dst )
self.connect( (self.txpath,1),self.dst2 )
if options.cheat:
self.txpath.enable_channel_cheating("channelcheat")
print "Hit Strg^C to terminate"
if options.event_rxbaseband:
self.publish_rx_baseband_measure()
if options.with_old_gui:
self.publish_spectrum(256)
self.rxpath.publish_ctf("ctf_display")
self.rxpath.publish_ber_measurement(["ber"])
self.rxpath.publish_average_snr(["totalsnr"])
if options.sinr_est:
self.rxpath.publish_sinrsc("sinrsc_display")
print "Hit Strg^C to terminate"
# Display some information about the setup
if self._verbose:
self._print_verbage()
def __init__ (self, options):
gr.top_block.__init__(self, "ofdm_tx")
self._tx_freq = options.tx_freq # tranmitter's center frequency
self._tx_subdev_spec = options.tx_subdev_spec # daughterboard to use
self._fusb_block_size = options.fusb_block_size # usb info for USRP
self._fusb_nblocks = options.fusb_nblocks # usb info for USRP
self._which = options.which_usrp
self._bandwidth = options.bandwidth
self.servants = []
self._interface = options.interface
self._mac_addr = options.mac_addr
self._options = copy.copy( options )
self._interpolation = 1
f1 = numpy.array([-107,0,445,0,-1271,0,2959,0,-6107,0,11953,
0,-24706,0,82359,262144/2,82359,0,-24706,0,
11953,0,-6107,0,2959,0,-1271,0,445,0,-107],
numpy.float64)/262144.
print "Software interpolation: %d" % (self._interpolation)
bw = 0.5/self._interpolation
tb = bw/5
if self._interpolation > 1:
self.filter = gr.hier_block2("filter",
gr.io_signature(1,1,gr.sizeof_gr_complex),
gr.io_signature(1,1,gr.sizeof_gr_complex))
self.filter.connect( self.filter, gr.interp_fir_filter_ccf(2,f1),
gr.interp_fir_filter_ccf(2,f1), self.filter )
print "New"
#
#
# self.filt_coeff = optfir.low_pass(1.0, 1.0, bw, bw+tb, 0.2, 60.0, 0)
# self.filter = gr.interp_fir_filter_ccf(self._interpolation,self.filt_coeff)
# print "Software interpolation filter length: %d" % (len(self.filt_coeff))
else:
self.filter = None
if not options.from_file is None:
# sent captured file to usrp
self.src = gr.file_source(gr.sizeof_gr_complex,options.from_file)
self._setup_usrp_sink()
if hasattr(self, "filter"):
self.connect(self.src,self.filter,self.u) #,self.filter
else:
self.connect(self.src,self.u)
return
self._setup_tx_path(options)
config = station_configuration()
self.enable_info_tx("info_tx", "pa_user")
# if not options.no_cheat:
# self.txpath.enable_channel_cheating("channelcheat")
self.txpath.enable_txpower_adjust("txpower")
self.txpath.publish_txpower("txpower_info")
#self.enable_txfreq_adjust("txfreq")
if options.nullsink:
self.dst = gr.null_sink( gr.sizeof_gr_complex )
else:
if not options.to_file is None:
# capture transmitter's stream to disk
self.dst = gr.file_sink(gr.sizeof_gr_complex,options.to_file)
tmp = gr.throttle(gr.sizeof_gr_complex,1e5)
self.connect( tmp, self.dst )
self.dst = tmp
if options.force_filter:
print "Forcing filter usage"
self.connect( self.filter, self.dst )
self.dst = self.filter
else:
# connect transmitter to usrp
self._setup_usrp_sink()
if options.dyn_freq:
self.enable_txfreq_adjust("txfreq")
if self.filter is not None:
self.connect( self.filter,self.dst )
self.dst = self.filter
if options.record:
log_to_file( self, self.txpath, "data/txpath_out.compl" )
#self.publish_spectrum( 256 )
if options.measure:
self.m = throughput_measure(gr.sizeof_gr_complex)
self.connect( self.m, self.dst )
self.dst = self.m
if options.samplingoffset is not None:
soff = options.samplingoffset
interp = gr.fractional_interpolator_cc(0.0,soff)
self.connect( interp, self.dst )
self.dst = interp
if options.snr is not None:
# if options.berm is not None:
# noise_sigma = 380 #empirically given, gives the received SNR range of (1:28) for tx amp. range of (500:10000) which is set in rm_ber_measurement.py
# #check for fading channel
# else:
snr_db = options.snr
snr = 10.0**(snr_db/10.0)
noise_sigma = sqrt( config.rms_amplitude**2 / snr )
print " Noise St. Dev. %d" % (noise_sigma)
awgn_chan = gr.add_cc()
awgn_noise_src = ofdm.complex_white_noise( 0.0, noise_sigma )
self.connect( awgn_noise_src, (awgn_chan,1) )
self.connect( awgn_chan, self.dst )
self.dst = awgn_chan
if options.berm is False:
fad_chan = itpp.tdl_channel( ) #[0, -7, -20], [0, 2, 6]
#fad_chan.set_norm_doppler( 1e-9 )
#fad_chan.set_LOS( [500.,0,0] )
fad_chan.set_channel_profile( itpp.ITU_Pedestrian_A, 5e-8 )
fad_chan.set_norm_doppler( 1e-8 )
# fad_chan = gr.fir_filter_ccc(1,[1.0,0.0,2e-1+0.1j,1e-4-0.04j])
self.connect( fad_chan, self.dst )
self.dst = fad_chan
if options.freqoff is not None:
freq_shift = gr.multiply_cc()
norm_freq = options.freqoff / config.fft_length
freq_off_src = gr.sig_source_c(1.0, gr.GR_SIN_WAVE, norm_freq, 1.0, 0.0 )
self.connect( freq_off_src, ( freq_shift, 1 ) )
dst = self.dst
self.connect( freq_shift, dst )
self.dst = freq_shift
self.connect( self.txpath, self.dst )
if options.cheat:
self.txpath.enable_channel_cheating("channelcheat")
print "Hit Strg^C to terminate"
