diff options
Diffstat (limited to 'gnuradio-examples/python/hier/sounder/usrp_sounder_rx.py')
| -rwxr-xr-x | gnuradio-examples/python/hier/sounder/usrp_sounder_rx.py | 108 |
1 files changed, 73 insertions, 35 deletions
diff --git a/gnuradio-examples/python/hier/sounder/usrp_sounder_rx.py b/gnuradio-examples/python/hier/sounder/usrp_sounder_rx.py index dd8007cbb..72ebeccfa 100755 --- a/gnuradio-examples/python/hier/sounder/usrp_sounder_rx.py +++ b/gnuradio-examples/python/hier/sounder/usrp_sounder_rx.py @@ -23,47 +23,85 @@ 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 -def main(): - parser = OptionParser(option_class=eng_option) +n2s = eng_notation.num_to_str + +class usrp_sounder_rx(gr.hier_block2): + def __init__(self, options): + gr.hier_block2.__init__(self, "usrp_sounder_rx", + gr.io_signature(0,0,0), + gr.io_signature(0,0,0)) + + 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 - # Receive path options - 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", "--max-delay", type="eng_float", default=10e-6, - help="set maximum delay spread (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 output amplitude (default=%default)") - (options, args) = parser.parse_args() + self.define_component("usrp", self._u) + self.define_component("head", gr.head(gr.sizeof_gr_complex, samples)) + self.define_component("rx", self._receiver) + self.define_component("c2m", gr.complex_to_mag()) + self.define_component("s2v", gr.stream_to_vector(gr.sizeof_float, self._length)) + self.define_component("lpf", gr.single_pole_iir_filter_ff(self._options.alpha, self._length)) + self.define_component("v2s", gr.vector_to_stream(gr.sizeof_float, self._length)) + self.define_component("sink", gr.file_sink(gr.sizeof_float, "impulse.dat")) - if len(args) != 0: - parser.print_help() - sys.exit(1) + self.connect("usrp", 0, "head", 0) + self.connect("head", 0, "rx", 0) + self.connect("rx", 0, "c2m", 0) + self.connect("c2m", 0, "s2v", 0) + self.connect("s2v", 0, "lpf", 0) + self.connect("lpf", 0, "v2s", 0) + self.connect("v2s", 0, "sink", 0) + + 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) - # Create an instance of a hierarchical block - top_block = sounder_rx(options.rx_subdev_spec, options.freq, options.cal, - options.verbose, options.max_delay, options.chip_rate, - options.gain) - - # Create an instance of a runtime, passing it the top block - # to process - runtime = gr.runtime(top_block) + top_block = usrp_sounder_rx(options) + runtime = gr.runtime(top_block) - try: - # Run forever - runtime.run() - except KeyboardInterrupt: - # Ctrl-C exits - pass + try: + runtime.run() + except KeyboardInterrupt: + pass if __name__ == '__main__': main () |