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Diffstat (limited to 'src/python/gsm_receive_usrp.py')
| -rwxr-xr-x | src/python/gsm_receive_usrp.py | 141 |
1 files changed, 0 insertions, 141 deletions
diff --git a/src/python/gsm_receive_usrp.py b/src/python/gsm_receive_usrp.py deleted file mode 100755 index a4e9720..0000000 --- a/src/python/gsm_receive_usrp.py +++ /dev/null @@ -1,141 +0,0 @@ -#!/usr/bin/env python -#this file isn't ready to use now - gsm-receiver lacks realtime processing capability -#there are many underruns of buffer for samples from usrp's, many blocks of samples get lost and -#receiver isn't prepared for this situation too well - -from gnuradio import gr, gru, blks2 -#, gsm -from gnuradio import usrp -from gnuradio.eng_option import eng_option -from optparse import OptionParser -from os import sys - -for extdir in ['../../debug/src/lib','../../debug/src/lib/.libs']: - if extdir not in sys.path: - sys.path.append(extdir) -import gsm - -def pick_subdevice(u): - if u.db[0][0].dbid() >= 0: - return (0, 0) - if u.db[1][0].dbid() >= 0: - return (1, 0) - return (0, 0) - -class tune(gr.feval_dd): - def __init__(self, top_block): - gr.feval_dd.__init__(self) - self.top_block = top_block - # self.center_freq = 0 - def eval(self, freq_offet): - # self.center_freq = self.center_freq - freq_offet - self.top_block.set_frequency(freq_offet) - return freq_offet - -class gsm_receiver_first_blood(gr.top_block): - def __init__(self): - gr.top_block.__init__(self) - (options, args) = self._process_options() - self.tune_callback = tune(self) - self.options = options - self.args = args - self._set_rates() - self.source = self._set_source() - self.filtr = self._set_filter() - self.interpolator = self._set_interpolator() - self.receiver = self._set_receiver() - self.converter = self._set_converter() - self.sink = self._set_sink() - - self.connect(self.source, self.filtr, self.interpolator, self.receiver, self.converter, self.sink) - - def _set_sink(self): - nazwa_pliku_wy = self.options.outputfile - ujscie = gr.file_sink(gr.sizeof_float, nazwa_pliku_wy) - return ujscie - - def _set_source(self): - options = self.options - fusb_block_size = gr.prefs().get_long('fusb', 'block_size', 4096) - fusb_nblocks = gr.prefs().get_long('fusb', 'nblocks', 16) - self.usrp = usrp.source_c(decim_rate=options.decim, fusb_block_size=fusb_block_size, fusb_nblocks=fusb_nblocks) - - if options.rx_subdev_spec is None: - options.rx_subdev_spec = pick_subdevice(self.usrp) - - self.usrp.set_mux(usrp.determine_rx_mux_value(self.usrp, options.rx_subdev_spec)) - # determine the daughterboard subdevice - self.subdev = usrp.selected_subdev(self.usrp, options.rx_subdev_spec) - input_rate = self.usrp.adc_freq() / self.usrp.decim_rate() - - # set initial values - if options.gain is None: - # if no gain was specified, use the mid-point in dB - g = self.subdev.gain_range() - options.gain = float(g[0]+g[1])/2 - - r = self.usrp.tune(0, self.subdev, options.freq) - self.subdev.set_gain(options.gain) - return self.usrp - - def _set_rates(self): - options = self.options - clock_rate = 64e6 - self.clock_rate = clock_rate - self.input_rate = clock_rate / options.decim - self.gsm_symb_rate = 1625000.0 / 6.0 - self.sps = self.input_rate / self.gsm_symb_rate / self.options.osr - - def _set_filter(self): - filter_cutoff = 145e3 - filter_t_width = 10e3 - offset = 0 -# print "input_rate:", self.input_rate, "sample rate:", self.sps, " filter_cutoff:", filter_cutoff, " filter_t_width:", filter_t_width - filter_taps = gr.firdes.low_pass(1.0, self.input_rate, filter_cutoff, filter_t_width, gr.firdes.WIN_HAMMING) - filtr = gr.freq_xlating_fir_filter_ccf(1, filter_taps, offset, self.input_rate) - return filtr - - def _set_converter(self): - v2s = gr.vector_to_stream(gr.sizeof_float, 142) - return v2s - - def _set_interpolator(self): - interpolator = gr.fractional_interpolator_cc(0, self.sps) - return interpolator - - def _set_receiver(self): - receiver = gsm.receiver_cf(self.tune_callback, self.options.osr) - return receiver - - def _process_options(self): - parser = OptionParser(option_class=eng_option) - parser.add_option("-d", "--decim", type="int", default=128, - help="Set USRP decimation rate to DECIM [default=%default]") - parser.add_option("-I", "--inputfile", type="string", default="cfile", - help="Input filename") - parser.add_option("-O", "--outputfile", type="string", default="cfile2.out", - help="Output filename") - parser.add_option("-R", "--rx-subdev-spec", type="subdev", default=None, - help="Select USRP Rx side A or B (default=first one with a daughterboard)") - parser.add_option("-r", "--osr", type="int", default=4, - help="Oversampling ratio [default=%default]") - parser.add_option("-f", "--freq", type="eng_float", default="950.4M", - help="set frequency to FREQ", metavar="FREQ") - parser.add_option("-g", "--gain", type="eng_float", default=None, - help="Set gain in dB (default is midpoint)") - (options, args) = parser.parse_args () - return (options, args) - - def set_frequency(self, center_freq): - self.filtr.set_center_freq(center_freq) - -def main(): - try: - gsm_receiver_first_blood().run() - except KeyboardInterrupt: - pass - -if __name__ == '__main__': - main() - - |