From f83ce2fcef58df5de5888e23cf36aebf069861b7 Mon Sep 17 00:00:00 2001 From: Joe Taylor Date: Tue, 17 Nov 2015 16:56:34 +0000 Subject: [PATCH] Mistakenly omitted including the file "implementation.adoc". git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@6113 ab8295b8-cf94-4d9e-aec4-7959e3be5d79 --- doc/user_guide/implementation.adoc | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/doc/user_guide/implementation.adoc b/doc/user_guide/implementation.adoc index 4f4ca6619..72ce23d90 100644 --- a/doc/user_guide/implementation.adoc +++ b/doc/user_guide/implementation.adoc @@ -77,3 +77,11 @@ is programmed to ``time out'' and report failure for a given signal if it takes too long. The choices *Fast | Normal | Deepest* on the *Decode* menu provide the user with a three-step adjustment of the timeout limit. + +Decoding in JT4 and WSPR modes is basically similar to that for JT9. +The same K=32, r=1/2 sequential Fano algorithm is used for all three +modes. Other details such as tone numbers, symbol lengths, +synchronizing scheme, and subroutine names are distinct for each mode. +The WSPR decoder now uses a two-pass algorithm. Decoded signals are +reconstructed and subtracted from the received waveform, after which a +second decoding pass takes place.