1 files changed, 66 insertions, 0 deletions
diff --git a/gr-radar/src/python/fm_demod_file.py b/gr-radar/src/python/fm_demod_file.py
new file mode 100755
index 000000000..9d430a892
--- /dev/null
+++ b/gr-radar/src/python/fm_demod_file.py
@@ -0,0 +1,66 @@
+#!/usr/bin/env python
+#
+# Copyright 2005 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+# Boston, MA 02111-1307, USA.
+# 
+
+"""
+Demod FM signal in data collected for radar.
+Input samples are complex baseband, 250kS/sec.
+"""
+
+from gnuradio import gr, gru, blks, eng_notation
+from gnuradio import audio
+from gnuradio.eng_option import eng_option
+from optparse import OptionParser
+import sys
+import math
+
+
+class my_graph(gr.flow_graph):
+    def __init__(self, input_filename, repeat):
+        gr.flow_graph.__init__(self)
+        
+        baseband_rate = 250e3
+        audio_decim = 8
+        audio_rate = int(baseband_rate // audio_decim) # output is at 31250 S/s
+
+        src = gr.file_source(gr.sizeof_gr_complex, input_filename, repeat)
+        guts = blks.wfm_rcv(self, baseband_rate, audio_decim)  
+        sink = audio.sink(audio_rate, "plughw:0,0")
+        self.connect(src, guts, sink)
+
+def main ():
+    usage = "usage: %prog [options] filename"
+    parser = OptionParser (option_class=eng_option, usage=usage)
+    parser.add_option ("-r", "--repeat", action="store_true", default=False)
+    (options, args) = parser.parse_args ()
+
+    if len (args) != 1:
+        parser.print_help ()
+        sys.exit (1)
+
+    try:
+        my_graph(args[0], options.repeat).run()
+    except KeyboardInterrupt:
+        pass
+    
+
+if __name__ == '__main__':
+    main ()