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LF: QRA Codes for LF ?

To: [email protected], rsgb_lf_group <[email protected]>
Subject: LF: QRA Codes for LF ?
From: Andy Talbot <[email protected]>
Date: Wed, 10 Aug 2016 15:41:54 +0100
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There is currently work going on in the WSJT development suite with a new class of error correcting code, Q-ary Repeat Accumulate , or QRA codes.  These appear to give several dB of improvement when used with the same modulation format as existing convolutional or Reed Solomon error correction.

A paper by Nico Palermo IV3NWV  on QRA coding is being presented at the EME conference, and can be found here:

Is anyone working on any low speed implementation  for LF use.  Seems to show possibilities.

There's also JT9 within the WSJT-X suite which in its narrowest form has a symbol rate and hence S/N comparable to WSPR2, but with QSO capability

Andy  G4JNT
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