diff options
Diffstat (limited to 'gnuradio-examples/python/ofdm/benchmark_ofdm.py')
| -rwxr-xr-x | gnuradio-examples/python/ofdm/benchmark_ofdm.py | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/gnuradio-examples/python/ofdm/benchmark_ofdm.py b/gnuradio-examples/python/ofdm/benchmark_ofdm.py index 778025405..690c57d60 100755 --- a/gnuradio-examples/python/ofdm/benchmark_ofdm.py +++ b/gnuradio-examples/python/ofdm/benchmark_ofdm.py @@ -36,14 +36,15 @@ class my_graph(gr.flow_graph): def __init__(self, callback, options): gr.flow_graph.__init__(self) - if options.channel_on: + if not options.channel_off: SNR = 10.0**(options.snr/10.0) - power_in_signal = 1.0 + power_in_signal = abs(options.tx_amplitude)**2.0 noise_power_in_channel = power_in_signal/SNR noise_voltage = math.sqrt(noise_power_in_channel/2.0) print "Noise voltage: ", noise_voltage frequency_offset = options.frequency_offset / options.fft_length + print "Frequency offset: ", frequency_offset if options.multipath_on: taps = [1.0, .2, 0.0, .1, .08, -.4, .12, -.2, 0, 0, 0, .3] @@ -70,7 +71,8 @@ class my_graph(gr.flow_graph): self.mux = gr.stream_mux(gr.sizeof_gr_complex, stream_size) self.throttle = gr.throttle(gr.sizeof_gr_complex, options.sample_rate) - self.channel = blks.channel_model(self, noise_voltage, frequency_offset, options.clockrate_ratio, taps) + self.channel = blks.channel_model(self, noise_voltage, frequency_offset, + options.clockrate_ratio, taps) self.rxpath = receive_path(self, callback, options) self.connect(self.zeros, (self.mux,0)) @@ -116,7 +118,7 @@ def main(): parser = OptionParser(option_class=eng_option, conflict_handler="resolve") expert_grp = parser.add_option_group("Expert") - parser.add_option("-s", "--size", type="eng_float", default=1450, + parser.add_option("-s", "--size", type="eng_float", default=400, help="set packet size [default=%default]") parser.add_option("-M", "--megabytes", type="eng_float", default=1.0, help="set megabytes to transmit [default=%default]") @@ -130,8 +132,8 @@ def main(): help="set clock rate ratio (sample rate difference) between two systems [default=%default]") parser.add_option("","--discontinuous", type="int", default=0, help="enable discontinous transmission, burst of N packets [Default is continuous]") - parser.add_option("","--channel-on", action="store_true", default=True, - help="Enables AWGN, freq offset") + parser.add_option("","--channel-off", action="store_true", default=False, + help="Turns AWGN, freq offset channel off") parser.add_option("","--multipath-on", action="store_true", default=False, help="enable multipath") |