bistromath/gr-air-modes — pull request #25 by jmcorgan (2012-10-29 16:41:03+00:00)
Title: Added option for pulse matched filtering

Pulse matched filtering places a boxcar filter upstream of the
averager and preamble detector. The filter length is equivalent
to the number of samples in one Mode S chip (0.5us). This
technique enhances operation when using sample rates > 4Msps.

When using --pmf, the threshold may need to be reduced a dB or
two from what would have been optimal without --pmf.

* rx_path.py now takes 'use_pmf', defaults to False

* modes_rx has new CLI option '-p' or '--pmf' to turn on PMF

* modes_gui has new checkbox on Setup tab