Forum: GNU Radio and low bit-rates

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Brett L. Trotter (Guest)
on 2007-06-02 04:11
(Received via mailing list)
In 3.03 and before, as opposed to CVS, one could add higher samples per
symbol values to and operate at lower bitrates than 35k.
Currently, gmsk seems to be the only one that works via that method,
dqpsk and dbpsk complain about sbs_to_mm not having an array key for the
particular value of samples/symbol. Did it previously figure out
something that worked and now uses a lookup?

Similarly, even with gmsk which lets me go below 35k, I seem to have
little to no success even with enough signal to operate at 35k.

What can I do, or what can be done to operate in the neighborhood of
1KB/s throughput and require the lowest possible SNR?

I've added in some error correcting code, but have almost no success
below 35k even if the tunnel appears to set-up.
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