FGFS-4.1/gr-air-modes
4
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

rip out the energy stuff, int-and-dump filter takes care of it

Browse Source
This commit is contained in:
Nick Foster
2011-05-30 20:45:59 -07:00
parent f86635430e
commit 52ebfcf4d4
7 changed files with 52 additions and 122 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
src/python/uhd_modes.py
View File

@@ -96,19 +96,22 @@ class adsb_rx_block (gr.top_block):
# self.filter = gr.fir_filter_fff(1, self.filtcoeffs)
#this is an integrate-and-dump filter to act as a matched filter
#for the essentially rectangular Mode S pulses.
#you could get fancy here and shape it accordingly but i'm pretty
#sure you wouldn't get anything out of it
self.filtcoeffs = list(numpy.ones(int(rate/2e6)))
#i think downstream blocks can therefore process at 2Msps -- try this
#self.filter = gr.fir_filter_fff(int(rate/2e6), self.filtcoeffs)
self.filter = gr.fir_filter_fff(1, self.filtcoeffs)
#rate = int(2e6)
#rate = 2e6
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.preamble, 0), (self.framer, 0))
self.connect(self.framer, self.slicer)