Add python and shell script files to run gsm-receiver on USRP2

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()