diff options
Diffstat (limited to 'gnuradio-examples/python/digital/usrp_receive_path.py')
| -rw-r--r-- | gnuradio-examples/python/digital/usrp_receive_path.py | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/gnuradio-examples/python/digital/usrp_receive_path.py b/gnuradio-examples/python/digital/usrp_receive_path.py index e28eb0a8c..517825cc1 100644 --- a/gnuradio-examples/python/digital/usrp_receive_path.py +++ b/gnuradio-examples/python/digital/usrp_receive_path.py @@ -63,15 +63,22 @@ class usrp_receive_path(gr.hier_block2): for attr in dir(rx_path): #forward the methods if not attr.startswith('_') and not hasattr(self, attr): setattr(self, attr, getattr(rx_path, attr)) + #setup usrp self._demod_class = demod_class self._setup_usrp_source(options) + + # Set up resampler based on rate determined by _setup_usrp_source + rs_taps = gr.firdes.low_pass_2(32, 32, 0.45, 0.1, 60) + self.resampler = gr.pfb_arb_resampler_ccf(self.rs_rate, rs_taps) + #connect - self.connect(self.u, rx_path) + self.connect(self.u, self.resampler, rx_path) def _setup_usrp_source(self, options): self.u = usrp_options.create_usrp_source(options) adc_rate = self.u.adc_rate() + self.rs_rate = options.bitrate if options.verbose: print 'USRP Source:', self.u (self._bitrate, self._samples_per_symbol, self._decim) = \ @@ -79,6 +86,11 @@ class usrp_receive_path(gr.hier_block2): options.samples_per_symbol, options.decim, adc_rate, \ self.u.get_decim_rates()) + # Calculate resampler rate based on requested and actual rates + self.rs_rate = 1.0 /(self._bitrate / self.rs_rate) + + print "Resampling by %f to get bitrate of %ssps" % ( self.rs_rate, eng_notation.num_to_str(self._bitrate/self.rs_rate)) + self.u.set_decim(self._decim) if not self.u.set_center_freq(options.rx_freq): |