FGFS-4.1/gr-air-modes
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Resample RTL data to 4Msps

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Nick Foster
2012-06-13 14:18:47 -07:00
parent 0310c3c81d
commit b7a9cfd01d
1 changed files with 4 additions and 4 deletions
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apps/uhd_modes.py
+4 -4
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@@ -91,7 +91,7 @@ class adsb_rx_block (gr.top_block):
self.u.set_gain(options.gain) self.u.set_gain(options.gain)
print "Gain is %i" % self.u.get_gain() print "Gain is %i" % self.u.get_gain()
use_lpfilt = True use_resampler = True
else: else:
if options.filename is not None: if options.filename is not None:
@@ -115,10 +115,10 @@ class adsb_rx_block (gr.top_block):
#self.framer = air_modes.modes_framer(rate) #self.framer = air_modes.modes_framer(rate)
self.slicer = air_modes.modes_slicer(rate, queue) self.slicer = air_modes.modes_slicer(rate, queue)
if use_lpfilt: if use_resampler:
self.lpfiltcoeffs = gr.firdes.low_pass(1, 5*rate, 1.2e6, 300e3) self.lpfiltcoeffs = gr.firdes.low_pass(1, 5*rate, 1.2e6, 300e3)
self.lpfilter = gr.fir_filter_ccf(1, self.lpfiltcoeffs) self.resample = blks2.rational_resampler_ccf(interpolation=5, decimation=3, taps=self.lpfiltcoeffs)
self.connect(self.u, self.lpfilter, self.demod) self.connect(self.u, self.resample, self.demod)
else: else:
self.connect(self.u, self.demod) self.connect(self.u, self.demod)