From f1c41f807cb29472d0924149e39d6ec8ad90e6a2 Mon Sep 17 00:00:00 2001
From: eb <eb@221aa14e-8319-0410-a670-987f0aec2ac5>
Date: Wed, 27 Sep 2006 05:14:03 +0000
Subject: Merged changes from eb/digital-wip into trunk.
This includes:
* renaming gnuradio-examples/python/gmsk2 to gnuradio-examples/python/digital
* refactoring the digital data tx and rx test code into benchmark_tx
and benchmark_rx. These accept a -m <modulation> argument.
<modulation> can currently be selected from gmsk, dbpsk, dqpsk
* Two new AGC blocks: gr_agc2: separate attack and delay rates;
gr_feedforward_agc: FIR-ish compressor. Normalizes to peak envelope.
* Working DBPSK mod/demod (works fine)
* Working DQPSK mod/demod (works, but still needs more work)
git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@3662 221aa14e-8319-0410-a670-987f0aec2ac5
---
.../python/digital/limbo/benchmark_mpsk_rx.py | 149 +++++++++++++++++++++
1 file changed, 149 insertions(+)
create mode 100755 gnuradio-examples/python/digital/limbo/benchmark_mpsk_rx.py
(limited to 'gnuradio-examples/python/digital/limbo/benchmark_mpsk_rx.py')
diff --git a/gnuradio-examples/python/digital/limbo/benchmark_mpsk_rx.py b/gnuradio-examples/python/digital/limbo/benchmark_mpsk_rx.py
new file mode 100755
index 0000000000..9bb70106f6
--- /dev/null
+++ b/gnuradio-examples/python/digital/limbo/benchmark_mpsk_rx.py
@@ -0,0 +1,149 @@
+#!/usr/bin/env python
+#
+# Copyright 2006 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., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+#
+
+from gnuradio import gr, gru, blks
+from gnuradio import usrp
+from gnuradio import eng_notation
+from gnuradio.eng_option import eng_option
+from optparse import OptionParser
+
+import random
+import struct
+
+# from current dir
+from bpsk import bpsk_demod
+from dbpsk import dbpsk_demod
+from dqpsk import dqpsk_demod
+from receive_path import receive_path
+import fusb_options
+
+if 1:
+ import os
+ print os.getpid()
+ raw_input('Attach and press enter')
+
+
+class my_graph(gr.flow_graph):
+
+ def __init__(self, demod_class, rx_subdev_spec,
+ bitrate, decim_rate, spb,
+ rx_callback, options, demod_kwargs):
+ gr.flow_graph.__init__(self)
+ self.rxpath = receive_path(self, demod_class, rx_subdev_spec,
+ bitrate, decim_rate, spb,
+ rx_callback, options, demod_kwargs)
+
+# /////////////////////////////////////////////////////////////////////////////
+# main
+# /////////////////////////////////////////////////////////////////////////////
+
+global n_rcvd, n_right
+
+def main():
+ global n_rcvd, n_right
+
+ n_rcvd = 0
+ n_right = 0
+
+ def rx_callback(ok, payload):
+ global n_rcvd, n_right
+ (pktno,) = struct.unpack('!H', payload[0:2])
+ n_rcvd += 1
+ if ok:
+ n_right += 1
+
+ print "ok = %r pktno = %4d n_rcvd = %4d n_right = %4d" % (
+ ok, pktno, n_rcvd, n_right)
+
+ 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")
+ parser.add_option("-f", "--freq", type="eng_float", default=423.1e6,
+ help="set Rx frequency to FREQ [default=%default]",
+ metavar="FREQ")
+ parser.add_option("-r", "--bitrate", type="eng_float", default=None,
+ help="specify bitrate. spb and interp will be derived.")
+ parser.add_option("-S", "--spb", type="int", default=None,
+ help="set samples/baud [default=%default]")
+ parser.add_option("-d", "--decim", type="intx", default=None,
+ help="set fpga decim rate to DECIM [default=%default]")
+ parser.add_option("-m", "--modulation", type="string", default='dbpsk',
+ help="modulation type (bpsk, dbpsk, dqpsk) [default=%default]")
+ parser.add_option("", "--excess-bw", type="float", default=0.3,
+ help="set RRC excess bandwith factor [default=%default]")
+ parser.add_option("-g", "--gain", type="eng_float", default=27,
+ help="set rx gain")
+ parser.add_option("","--log", action="store_true", default=False,
+ help="enable diagnostic logging")
+ fusb_options.add_options(parser)
+ (options, args) = parser.parse_args ()
+
+ if len(args) != 0:
+ parser.print_help()
+ sys.exit(1)
+
+ if options.freq < 1e6:
+ options.freq *= 1e6
+
+ demod_kwargs = {
+ 'excess_bw' : options.excess_bw,
+ }
+
+ #FIXME: Needs to be worked in to overall structure; this will be fixed
+ # once static class definitions for modulations are defined
+ if(options.modulation=='bpsk'):
+ modulation=bpsk_demod
+ elif(options.modulation=='dbpsk'):
+ modulation=dbpsk_demod
+ else:
+ modulation=dqpsk_demod
+
+ # build the graph
+ fg = my_graph(modulation,
+ options.rx_subdev_spec, options.bitrate,
+ options.decim, options.spb,
+ rx_callback, options, demod_kwargs)
+
+ print "bitrate: %sb/sec" % (eng_notation.num_to_str(fg.rxpath.bitrate()),)
+ print "spb: %3d" % (fg.rxpath.spb(),)
+ print "decim: %3d" % (fg.rxpath.decim(),)
+
+ ok = fg.rxpath.set_freq(options.freq)
+ if not ok:
+ print "Failed to set Rx frequency to %s" % (eng_notation.num_to_str(options.freq),)
+ raise SystemExit
+
+ fg.rxpath.set_gain(options.gain)
+ print "Rx gain_range: ", fg.rxpath.subdev.gain_range(), " using", fg.rxpath.gain
+
+ r = gr.enable_realtime_scheduling()
+ if r != gr.RT_OK:
+ print "Warning: Failed to enable realtime scheduling."
+
+ fg.start() # start flow graph
+ fg.wait() # wait for it to finish
+
+if __name__ == '__main__':
+ try:
+ main()
+ except KeyboardInterrupt:
+ pass
--
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