diff options
Diffstat (limited to 'gsm-receiver')
| -rw-r--r-- | gsm-receiver/src/python/go_usrp2.sh | 26 | ||||
| -rw-r--r-- | gsm-receiver/src/python/gsm_receive100.py | 119 |
2 files changed, 145 insertions, 0 deletions
diff --git a/gsm-receiver/src/python/go_usrp2.sh b/gsm-receiver/src/python/go_usrp2.sh new file mode 100644 index 0000000..707dda4 --- /dev/null +++ b/gsm-receiver/src/python/go_usrp2.sh @@ -0,0 +1,26 @@ +#! /bin/sh + +#echo "go.sh <file.cfile> [decim==174]" + +KEY=$4 +CONFIGURATION=$3 +DECIM=$2 +FILE=$1 + +if [ $DECIM"x" = x ]; then + DECIM=174 +fi + +if [ $CONFIGURATION"x" = x ]; then + CONFIGURATION="" +fi + +if [ "$KEY""x" = x ]; then + KEY="00 00 00 00 00 00 00 00" +fi + +# Use GSMTAP with WireShark instead of gmsdecode ! + +#./gsm_receive100.py -d "$DECIM" -I "$FILE" -c "$CONFIGURATION" -k "$KEY" | ../../../gsmdecode/src/gsmdecode -i + +./gsm_receive100.py -d "$DECIM" -I "$FILE" -c "$CONFIGURATION" -k "$KEY" diff --git a/gsm-receiver/src/python/gsm_receive100.py b/gsm-receiver/src/python/gsm_receive100.py new file mode 100644 index 0000000..d59474f --- /dev/null +++ b/gsm-receiver/src/python/gsm_receive100.py @@ -0,0 +1,119 @@ +#!/usr/bin/env python + +from gnuradio import gr, gru, blks2 +#, gsm +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','../lib','../lib/.libs']: + if extdir not in sys.path: + sys.path.append(extdir) +import gsm + +class tuner(gr.feval_dd): + def __init__(self, top_block): + gr.feval_dd.__init__(self) + self.top_block = top_block + def eval(self, freq_offet): + self.top_block.set_center_frequency(freq_offet) + return freq_offet + +class synchronizer(gr.feval_dd): + def __init__(self, top_block): + gr.feval_dd.__init__(self) + self.top_block = top_block + + def eval(self, timing_offset): + self.top_block.set_timing(timing_offset) + 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.tuner_callback = tuner(self) + self.synchronizer_callback = synchronizer(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): + nazwa_pliku = self.options.inputfile + zrodlo = gr.file_source(gr.sizeof_gr_complex, nazwa_pliku, False) + return zrodlo + + def _set_rates(self): + options = self.options + clock_rate = 100e6 + 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.tuner_callback, self.synchronizer_callback, self.options.osr, self.options.key.replace(' ', '').lower(), self.options.configuration.upper()) + 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("-r", "--osr", type="int", default=4, + help="Oversampling ratio [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("-k", "--key", type="string", default="AD 6A 3E C2 B4 42 E4 00", + help="KC session key") + parser.add_option("-c", "--configuration", type="string", default="", + help="Decoder configuration") + + (options, args) = parser.parse_args () + return (options, args) + + def set_center_frequency(self, center_freq): + self.filtr.set_center_freq(center_freq) + + def set_timing(self, timing_offset): + pass + +def main(): + try: + gsm_receiver_first_blood().run() + except KeyboardInterrupt: + pass + +if __name__ == '__main__': + main() |