Hi Greg,
N1DAM wrote:
> ...
> Thanks for the explanation. It would be good to have that be readily
> understandable by someone starting at the web site and trying to
> understand everything. Perhaps the "now go install kvasd" section could
> turn into an "optional/recommended" section, with that explanation. (In
> addition, I've never been clear on whether WSPR needs or can use kvasd.)
The Koetter-Vardy Algebraic Soft-Decision algorithm is for decoding
Reed-Solomon codes. Of all the WSJT-related modes (FSK441, JTMS, ISCAT,
JT6M, JT4, JT9, JT65, WSPR), only JT65 uses a Reed-SOlomon code.
Modes JT4, JT9, and WSPR also use strong FEC (forward error correction),
but they use a convolutional code for which an open-source soft-decision
decoder is provided.
Program kvasd would be of no use whatever for JT4, JT9, or WSPR.
-- Joe, K1JT
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