1 files changed, 95 insertions, 0 deletions
diff --git a/gnuradio-examples/python/limbo/sounder/usrp_sounder_rx.py b/gnuradio-examples/python/limbo/sounder/usrp_sounder_rx.py
new file mode 100755
index 0000000000..6b85281ad7
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+++ b/gnuradio-examples/python/limbo/sounder/usrp_sounder_rx.py
@@ -0,0 +1,95 @@
+#!/usr/bin/env python
+#
+# Copyright 2007 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 3, 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., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+# 
+
+from gnuradio import gr, eng_notation
+from gnuradio.eng_option import eng_option
+from optparse import OptionParser
+from usrp_source import usrp_source_c
+from sounder_rx import sounder_rx
+
+n2s = eng_notation.num_to_str
+
+class usrp_sounder_rx(gr.top_block):
+    def __init__(self, options):
+        gr.top_block.__init__(self, "usrp_sounder_rx")
+        self._options = options
+        self._u = usrp_source_c(0,
+                                self._options.rx_subdev_spec,
+                                self._options.gain,
+                                self._options.chip_rate,
+                                self._options.freq,
+                                self._options.cal,
+                                self._options.verbose)
+        self._options.chip_rate = self._u._if_rate
+        self._length = 2**self._options.degree-1
+        self._receiver = sounder_rx(self._options.chip_rate,
+                                    self._options.degree,
+                                    self._options.verbose)
+
+        samples = 100 * self._length**2
+
+        head = gr.head(gr.sizeof_gr_complex, samples)
+        c2m = gr.complex_to_mag()
+        s2v = gr.stream_to_vector(gr.sizeof_float, self._length)
+        lpf = gr.single_pole_iir_filter_ff(self._options.alpha, self._length)
+        v2s = gr.vector_to_stream(gr.sizeof_float, self._length)
+        sink = gr.file_sink(gr.sizeof_float, "impulse.dat")
+
+	self.connect(self._u, head, self._receiver, c2m, s2v, lpf, v2s, sink)
+
+	if self._options.verbose:
+            print "Chip rate is", n2s(self._options.chip_rate), "chips/sec"
+            print "Resolution is", n2s(1.0/self._options.chip_rate), "sec"
+            print "Using PN code of degree", self._options.degree
+
+def main():
+    parser = OptionParser(option_class=eng_option)
+    parser.add_option("-R", "--rx-subdev-spec", type="subdev", default=None,
+                      help="select USRP Rx side A or B (default=first found)")
+    parser.add_option("-f", "--freq", type="eng_float", default=0.0,
+                      help="set center frequency (default=%default)")
+    parser.add_option("-c", "--cal", type="eng_float", default=0.0,
+                      help="set frequency calibration offset (default=%default)")
+    parser.add_option("-v", "--verbose", action="store_true", default=False,
+                      help="print extra debugging info")
+    parser.add_option("-d", "--degree", type="int", default=10,
+                      help="set PN code degree (length=2**degree-1, default=%default)")
+    parser.add_option("-r", "--chip-rate", type="eng_float", default=8e6,
+                      help="set sounder chip rate (default=%default)")
+    parser.add_option("-g", "--gain", type="eng_float", default=None,
+                      help="set receiver gain (default=%default)")
+    parser.add_option("", "--alpha", type="eng_float", default=1.0,
+                      help="set smoothing constant (default=%default)")
+    (options, args) = parser.parse_args()
+    if len(args) != 0:
+        parser.print_help()
+        sys.exit(1)
+
+    top_block = usrp_sounder_rx(options)
+
+    try:
+        top_block.run()
+    except KeyboardInterrupt:
+        pass
+
+if __name__ == '__main__':
+    main ()