FGFS-4.1/gr-air-modes
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Derp. Forgot to git-add the KML parser. Also added an LPF to the main app. Some other cleanups in prep for release.

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Nick Foster
2010-10-23 16:05:08 -07:00
parent 01a0b635c6
commit 839596a4b2
4 changed files with 177 additions and 7 deletions
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27
src/python/uhd_modes.py
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@@ -84,21 +84,34 @@ class adsb_rx_block (gr.top_block):
self.demod = gr.complex_to_mag()
self.avg = gr.moving_average_ff(100, 1.0/100, 400);
# self.filtcoeffs = gr.firdes.band_reject(1, rate, -691e3, -646e3, 10e3, WIN_HANN)
# self.filter = gr.fir_filter_ccc(1, self.filtcoeffs)
#the DBSRX especially tends to be spur-prone; the LPF keeps out the
#spur multiple that shows up at 2MHz
self.filtcoeffs = gr.firdes.low_pass(1, rate, 1.8e6, 200e3)
self.filter = gr.fir_filter_fff(1, self.filtcoeffs)
self.preamble = air.modes_preamble(rate, options.threshold)
self.framer = air.modes_framer(rate)
self.slicer = air.modes_slicer(rate, queue)
self.connect(self.u, self.demod)
self.connect(self.demod, self.avg)
self.connect(self.demod, (self.preamble, 0))
self.connect(self.u, self.demod, self.filter)
self.connect(self.filter, self.avg)
self.connect(self.filter, (self.preamble, 0))
self.connect(self.avg, (self.preamble, 1))
self.connect(self.demod, (self.framer, 0))
self.connect(self.filter, (self.framer, 0))
self.connect(self.preamble, (self.framer, 1))
self.connect(self.demod, (self.slicer, 0))
self.connect(self.filter, (self.slicer, 0))
self.connect(self.framer, (self.slicer, 1))
#use this flowgraph instead to omit the filter
# self.connect(self.u, self.demod)
# self.connect(self.demod, self.avg)
# self.connect(self.demod, (self.preamble, 0))
# self.connect(self.avg, (self.preamble, 1))
# self.connect(self.demod, (self.framer, 0))
# self.connect(self.preamble, (self.framer, 1))
# self.connect(self.demod, (self.slicer, 0))
# self.connect(self.framer, (self.slicer, 1))
def tune(self, freq):
result = self.u.set_center_freq(freq)