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Looking at the existing DBPSK detector, it seems that the current
software doesn’t do any sort of transmission detection where
demodulation only happens if there’s an increase of energy in the air.
It seems you could implement this easily with a block that keeps a
sliding average of the energy and only forwards those samples that are
above the noise floor. Even with schemes like BPSK that experience great
amplitude fluctuation, the energy never drops anywhere near 0.
Comments on problems with doing this that I don’t foresee? Advice on how
to decide between noise and signal? I imagine that doing this poorly
will lead to pulses with SNR less than, say, +3 to +10 db being dropped
which would be pretty crappy.
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