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| author | Josh Blum <josh@joshknows.com> | 2011-09-05 22:35:52 -0700 |
|---|---|---|
| committer | Josh Blum <josh@joshknows.com> | 2011-09-05 22:35:52 -0700 |
| commit | 7628cff158a4bddaef5f38dc649ea9047008ed48 (patch) | |
| tree | 18d32766d5dc97be3f24a5cedf38d018194d1f1c /gr-digital/examples | |
| parent | f535cd0f1fbc7cfc753f5abbe99251a50cd32acb (diff) | |
| parent | 65fbbb8f752ebf522ac2628f850445e66a278e2f (diff) | |
Merge branch 'digital' of https://github.com/trondeau/gnuradio into digital
Conflicts:
gnuradio-core/src/lib/general/gr_pll_carriertracking_cc.h
gnuradio-core/src/lib/general/gr_pll_freqdet_cf.h
gr-digital/lib/digital_constellation.h
gr-digital/lib/digital_constellation_receiver_cb.h
gr-digital/lib/digital_fll_band_edge_cc.h
gr-digital/lib/digital_mpsk_receiver_cc.h
Diffstat (limited to 'gr-digital/examples')
| -rw-r--r-- | gr-digital/examples/CMakeLists.txt | 27 | ||||
| -rwxr-xr-x | gr-digital/examples/benchmark_add_channel.py | 101 |
2 files changed, 128 insertions, 0 deletions
diff --git a/gr-digital/examples/CMakeLists.txt b/gr-digital/examples/CMakeLists.txt new file mode 100644 index 0000000000..55a8379d9a --- /dev/null +++ b/gr-digital/examples/CMakeLists.txt @@ -0,0 +1,27 @@ +# Copyright 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. + +INCLUDE(GrPython) + +GR_PYTHON_INSTALL(PROGRAMS + transmit_path.py + receive_path.py + DESTINATION ${GR_PKG_DATA_DIR}/examples/digital + COMPONENT "digital_python" +) diff --git a/gr-digital/examples/benchmark_add_channel.py b/gr-digital/examples/benchmark_add_channel.py new file mode 100755 index 0000000000..def1f8267e --- /dev/null +++ b/gr-digital/examples/benchmark_add_channel.py @@ -0,0 +1,101 @@ +#!/usr/bin/env python +# +# Copyright 2010,2011 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 +from gnuradio import eng_notation +from gnuradio.eng_option import eng_option +from optparse import OptionParser + +import random, math, sys + +class my_top_block(gr.top_block): + def __init__(self, ifile, ofile, options): + gr.top_block.__init__(self) + + SNR = 10.0**(options.snr/10.0) + frequency_offset = options.frequency_offset + time_offset = options.time_offset + phase_offset = options.phase_offset*(math.pi/180.0) + + # calculate noise voltage from SNR + # FIXME: normalize to signal amplitude + power_in_signal = abs(1.0)**2 + noise_power = power_in_signal/SNR + noise_voltage = math.sqrt(noise_power) + print noise_voltage + + self.src = gr.file_source(gr.sizeof_gr_complex, ifile) + #self.throttle = gr.throttle(gr.sizeof_gr_complex, options.sample_rate) + self.channel = gr.channel_model(noise_voltage, frequency_offset, + time_offset, noise_seed=random.randint(0,100000)) + self.phase = gr.multiply_const_cc(complex(math.cos(phase_offset), + math.sin(phase_offset))) + self.snk = gr.file_sink(gr.sizeof_gr_complex, ofile) + + self.connect(self.src, self.channel, self.phase, self.snk) + + +# ///////////////////////////////////////////////////////////////////////////// +# main +# ///////////////////////////////////////////////////////////////////////////// + +def main(): + # Create Options Parser: + usage = "benchmack_add_channel.py [options] <input file> <output file>" + parser = OptionParser (usage=usage, option_class=eng_option, conflict_handler="resolve") + parser.add_option("-n", "--snr", type="eng_float", default=30, + help="set the SNR of the channel in dB [default=%default]") + parser.add_option("", "--seed", action="store_true", default=False, + help="use a random seed for AWGN noise [default=%default]") + parser.add_option("-f", "--frequency-offset", type="eng_float", default=0, + help="set frequency offset introduced by channel [default=%default]") + parser.add_option("-t", "--time-offset", type="eng_float", default=1.0, + help="set timing offset between Tx and Rx [default=%default]") + parser.add_option("-p", "--phase-offset", type="eng_float", default=0, + help="set phase offset (in degrees) between Tx and Rx [default=%default]") + parser.add_option("-m", "--use-multipath", action="store_true", default=False, + help="Use a multipath channel [default=%default]") + + (options, args) = parser.parse_args () + + if len(args) != 2: + parser.print_help(sys.stderr) + sys.exit(1) + + ifile = args[0] + ofile = args[1] + + # build the graph + tb = my_top_block(ifile, ofile, options) + + r = gr.enable_realtime_scheduling() + if r != gr.RT_OK: + print "Warning: Failed to enable realtime scheduling." + + tb.start() # start flow graph + tb.wait() # wait for it to finish + +if __name__ == '__main__': + try: + main() + except KeyboardInterrupt: + pass |