From d1e3108c8705289d194300ca9fad1c22f579be9b Mon Sep 17 00:00:00 2001
From: Tom Rondeau <trondeau@vt.edu>
Date: Wed, 12 Oct 2011 16:57:51 -0400
Subject: digital: moved narrowband examples to their own directory (to make
room for OFDM examples).
---
gr-digital/examples/narrowband/digital_bert_tx.py | 135 ++++++++++++++++++++++
1 file changed, 135 insertions(+)
create mode 100755 gr-digital/examples/narrowband/digital_bert_tx.py
(limited to 'gr-digital/examples/narrowband/digital_bert_tx.py')
diff --git a/gr-digital/examples/narrowband/digital_bert_tx.py b/gr-digital/examples/narrowband/digital_bert_tx.py
new file mode 100755
index 0000000000..6b544c7f73
--- /dev/null
+++ b/gr-digital/examples/narrowband/digital_bert_tx.py
@@ -0,0 +1,135 @@
+#!/usr/bin/env python
+#
+# Copyright 2008,2011 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
+import sys
+
+from gnuradio import digital
+
+# from current dir
+from uhd_interface import uhd_transmitter
+
+n2s = eng_notation.num_to_str
+
+class bert_transmit(gr.hier_block2):
+ def __init__(self, constellation, samples_per_symbol,
+ differential, excess_bw, gray_coded,
+ verbose, log):
+
+ gr.hier_block2.__init__(self, "bert_transmit",
+ gr.io_signature(0, 0, 0), # Output signature
+ gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Input signature
+
+ # Create BERT data bit stream
+ self._bits = gr.vector_source_b([1,], True) # Infinite stream of ones
+ self._scrambler = gr.scrambler_bb(0x8A, 0x7F, 7) # CCSDS 7-bit scrambler
+
+ self._mod = digital.generic_mod(constellation, samples_per_symbol,
+ differential, excess_bw, gray_coded,
+ verbose, log)
+
+ self._pack = gr.unpacked_to_packed_bb(self._mod.bits_per_symbol(), gr.GR_MSB_FIRST)
+
+ self.connect(self._bits, self._scrambler, self._pack, self._mod, self)
+
+
+class tx_psk_block(gr.top_block):
+ def __init__(self, mod, options):
+ gr.top_block.__init__(self, "tx_mpsk")
+
+ self._modulator_class = mod
+
+ # Get mod_kwargs
+ mod_kwargs = self._modulator_class.extract_kwargs_from_options(options)
+
+ # transmitter
+ self._modulator = self._modulator_class(**mod_kwargs)
+
+ if(options.tx_freq is not None):
+ self._sink = uhd_transmitter(options.address, options.bitrate,
+ options.samples_per_symbol,
+ options.tx_freq, options.tx_gain,
+ options.antenna, options.verbose)
+ options.samples_per_symbol = self._sink._sps
+
+ elif(options.to_file is not None):
+ self._sink = gr.file_sink(gr.sizeof_gr_complex, options.to_file)
+ else:
+ self._sink = gr.null_sink(gr.sizeof_gr_complex)
+
+
+ self._transmitter = bert_transmit(self._modulator._constellation,
+ options.samples_per_symbol,
+ options.differential,
+ options.excess_bw,
+ gray_coded=True,
+ verbose=options.verbose,
+ log=options.log)
+
+ self.connect(self._transmitter, self._sink)
+
+
+def get_options(mods):
+ parser = OptionParser(option_class=eng_option, conflict_handler="resolve")
+ parser.add_option("-m", "--modulation", type="choice", choices=mods.keys(),
+ default='psk',
+ help="Select modulation from: %s [default=%%default]"
+ % (', '.join(mods.keys()),))
+ parser.add_option("", "--amplitude", type="eng_float", default=0.2,
+ help="set Tx amplitude (0-1) (default=%default)")
+ parser.add_option("-r", "--bitrate", type="eng_float", default=250e3,
+ help="Select modulation bit rate (default=%default)")
+ parser.add_option("-S", "--samples-per-symbol", type="float", default=2,
+ help="set samples/symbol [default=%default]")
+ parser.add_option("","--to-file", default=None,
+ help="Output file for modulated samples")
+ if not parser.has_option("--verbose"):
+ parser.add_option("-v", "--verbose", action="store_true", default=False)
+ if not parser.has_option("--log"):
+ parser.add_option("", "--log", action="store_true", default=False)
+
+ uhd_transmitter.add_options(parser)
+
+ for mod in mods.values():
+ mod.add_options(parser)
+
+ (options, args) = parser.parse_args()
+ if len(args) != 0:
+ parser.print_help()
+ sys.exit(1)
+
+ return (options, args)
+
+if __name__ == "__main__":
+ mods = digital.modulation_utils2.type_1_mods()
+
+ (options, args) = get_options(mods)
+
+ mod = mods[options.modulation]
+ tb = tx_psk_block(mod, options)
+
+ try:
+ tb.run()
+ except KeyboardInterrupt:
+ pass
--
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