def __init__(self, options):
gr.top_block.__init__(self)
if(options.rx_freq is not None):
symbol_rate = 500000
self.source = uhd_receiver(options.args, symbol_rate,
2,
options.rx_freq, 30,
#options.spec, "RX2",
options.spec, "TX/RX",
1) #options.verbose)
options.samples_per_symbol = self.source._sps
elif(options.from_file is not None):
sys.stderr.write(("Reading samples from '%s'.\n\n" % (options.from_file)))
self.source = gr.file_source(gr.sizeof_gr_complex, options.from_file)
else:
sys.stderr.write("No source defined, pulling samples from null source.\n\n")
self.source = gr.null_source(gr.sizeof_gr_complex)
# Set up receive path
# Correlator block
self.correlator = correlator_cc.correlator_cc()
# Despreader block
self.despreader = spreader.despreader_cb()
# RS Decoder block
self.decoder = rscoding_bb.decode_bb()
# CRC RX Block
self.crcrx = crc.crcrx()
# Packetizer receiver
self.packetrx = packetizer.packet_sink()
# Print block
self.printer = print_bb.print_bb()
# NULL sink block
self.nullsink = gr.null_sink(1)
# RRC filter
#nfilts = 32
#ntaps = nfilts * 11 * int(options.samples_per_symbol)
#self.rrc_taps = gr.firdes.root_raised_cosine(
#1.0, # gain
#1000000, # sampling rate based on 32 fliters in resampler
#symbol_rate, # symbol rate
#1.0, # excess bandwidth or roll-off factor
#ntaps)
#self.rrc_filter = gr.pfb_arb_resampler_ccf(options.samples_per_symbol,
# self.rrc_taps)
# Design filter to get actual channel we want
sw_decim = 1
chan_coeffs = gr.firdes.low_pass (1.0, # gain
#sw_decim * self.samples_per_symbol(), # sampling rate
#1000000, # sampling rate
2,
#self._chbw_factor, # midpoint of trans. band
1, # midpoint of trans. band
0.5, # width of trans. band
gr.firdes.WIN_HANN) # filter type
self.channel_filter = gr.fft_filter_ccc(sw_decim, chan_coeffs)
# Connect the blocks
#self.connect(self.source, self.correlator)
#self.connect(self.source, self.rrc_filter)
#self.connect(self.rrc_filter, self.correlator)
# connect block input to channel filter
self.connect(self.source, self.channel_filter)
self.connect(self.channel_filter, self.correlator)
#self.connect(self.source, self.correlator)
self.connect(self.correlator, self.despreader)
self.connect(self.despreader, self.decoder)
self.connect(self.decoder, self.crcrx)
#self.connect(self.decoder, self.printer)
#self.connect(self.printer, self.crcrx)
#self.connect(self.despreader, self.printer)
#self.connect(self.printer, self.nullsink)
#self.connect(self.printer, self.filesink)
#self.connect(self.crcrx, self.filesink)
self.connect(self.crcrx, self.packetrx)
def __init__(self, options):
gr.top_block.__init__(self)
# Source block
symbol_rate = 500000
self.source = uhd_receiver(options.args, symbol_rate,
2,
options.rx_freq, 30,
#options.spec, "RX2",
options.spec, "TX/RX",
1) #options.verbose)
options.samples_per_symbol = self.source._sps
RX_output_file = "RX_output_test_file"
_RX_output_file = 'RX_output_test_file'
#RX_output_file = "Ding_Dong2.wma"
#_RX_output_file = 'Ding_Dong2.wma'
RX_file_sink = gr.file_sink(gr.sizeof_char, RX_output_file)
RX_output_filesize = os.stat(_RX_output_file).st_size
#print RX_output_filesize
self.filesink = gr.file_sink(1, "output_file")
# Correlator block
self.correlator = correlator_cc.correlator_cc()
# Despreader block
self.despreader = spreader.despreader_cb()
# RS Decoder block
self.decoder = rscoding_bb.decode_bb()
# CRC RX Block
self.crcrx = crc.crcrx()
# Print block
self.printer = print_bb.print_bb()
# NULL sink block
self.nullsink = gr.null_sink(1)
# RRC filter
#nfilts = 32
#ntaps = nfilts * 11 * int(options.samples_per_symbol)
#self.rrc_taps = gr.firdes.root_raised_cosine(
#1.0, # gain
#1000000, # sampling rate based on 32 fliters in resampler
#symbol_rate, # symbol rate
#1.0, # excess bandwidth or roll-off factor
#ntaps)
#self.rrc_filter = gr.pfb_arb_resampler_ccf(options.samples_per_symbol,
# self.rrc_taps)
# Design filter to get actual channel we want
sw_decim = 1
chan_coeffs = gr.firdes.low_pass (1.0, # gain
#sw_decim * self.samples_per_symbol(), # sampling rate
#1000000, # sampling rate
2,
#self._chbw_factor, # midpoint of trans. band
1, # midpoint of trans. band
0.5, # width of trans. band
gr.firdes.WIN_HANN) # filter type
self.channel_filter = gr.fft_filter_ccc(sw_decim, chan_coeffs)
# Connect the blocks
#self.connect(self.source, self.correlator)
#self.connect(self.source, self.rrc_filter)
#self.connect(self.rrc_filter, self.correlator)
# connect block input to channel filter
self.connect(self.source, self.channel_filter)
self.connect(self.channel_filter, self.correlator)
#self.connect(self.source, self.correlator)
self.connect(self.correlator, self.despreader)
self.connect(self.despreader, self.decoder)
self.connect(self.decoder, self.crcrx)
#self.connect(self.decoder, self.printer)
#self.connect(self.printer, self.crcrx)
#self.connect(self.despreader, self.printer)
#self.connect(self.printer, self.nullsink)
#self.connect(self.printer, self.filesink)
#self.connect(self.crcrx, self.filesink)
self.connect(self.crcrx, RX_file_sink)