1 files changed, 57 insertions, 0 deletions
diff --git a/gsmsp/python/gsm_run.py b/gsmsp/python/gsm_run.py
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+++ b/gsmsp/python/gsm_run.py
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+#!/usr/bin/env python
+
+# import the GNU Radio code
+import os
+from gnuradio import gr, blks
+import gsm
+from gnuradio.blksimpl import gmsk
+
+gsm_rate	= 1625000.0 / 6.0	# GSM samples / symbol
+
+# most useful file Robert has
+#file_name	= os.environ.get("GSMSPROOT") + "/resources/data/GSMSP_20070218_robert_dbsrx_941MHz_112.cfile"
+#file_name	= os.environ.get("GSMSPROOT") + "/resources/data/GSMSP_20070204_robert_dbsrx_953.6MHz_64.cfile"
+file_name	= "signal.data"
+#decimation	= 64			# the decimation Robert used
+#decimation	= 112			# the decimation Robert used
+decimation	= 118			# the decimation Robert used
+
+sps		= 64e6 / decimation	# samples / second with this decimation
+
+filter_cutoff	= 150e3			# bandpass filter between +/- 150kHz
+filter_t_width	= 50e3			# width of filter transition
+offset		= 0			# Robert didn't need an offset
+
+
+# create a GNURadio Flow Graph
+fg = gr.flow_graph()
+
+	# create a file source from Robert's file
+source = gr.file_source(gr.sizeof_gr_complex, file_name)
+
+# create a filter with the above constants
+filter_taps = gr.firdes.low_pass(1.0, sps, filter_cutoff,
+filter_t_width, gr.firdes.WIN_HAMMING)
+filter = gr.freq_xlating_fir_filter_ccf(1, filter_taps, offset, sps)
+
+# create the GMSK demod object
+gd = gmsk.gmsk_demod(fg, sps / gsm_rate, gain_mu = 0.01,
+omega_relative_limit = 0.005)
+
+#diff = gr.diff_decoder_bb (2)
+
+gsm = gsm.run_bb ()
+#sqr = gr_example_b.square_bb ()
+
+# create the vector sink
+#sink = gr.vector_sink_b()
+
+# connect all the blocks together
+fg.connect(source, filter, gd, gsm)
+
+# process the file
+fg.run()
+
+# dump the data
+#print sink.data()
+