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Date: Mon, 1 Feb 2016 12:37:20 -0500
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From: Warren Ziegler <wd2xgj@gmail.com>
To: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Subject: Re: LF: WOLF Coding
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Status: O

Andy,

    I believe that Lyle Koehler K0LR did a PIC implementation for WOLF
a number of years ago. I have an exciter with it incorporated but
unfortunately it was driven by an unstable source. Will see what
documentation I can dig up when I get home.

73 Warren K2ORS


On Mon, Feb 1, 2016 at 12:18 PM, Andy Talbot <andy.g4jnt@gmail.com> wrote:
> I'm contemplating writing some PIC code to encode WOLF (the software) into a
> PIC to make a standalone beacon transmitter source.   A generator for the
> rate 1/6  32 constraint length  convolutional code will fit into a 16F628A
> chip  without too much difficulty - I've already done it for JT4 and WSPR;
> it just needs more parallel shift registers and less message memory than
> those modes do.
>
> Looking back though the archives of various progs written over the years, I
> found one written back in 2010 that generates the bit pattern for a WOLF
> message.   So back then,  must have been thinking of doing something with
> WOLF but it never got beyond a basic coder.   To be able to write that
> software I must have had the original source code by John / team or Wolf
> (the operator!) for the mode, but can't find it.
>
> Also have a bit of a conundrum - in that  software I provided the option for
> interleaving the final data or not, but don't know if the current Wolf GUI
> software implements interleaving or not.
>
> This is the interleaving code I wrote back then  (PowerBasic language,
> variables here are all long ints) but don't know if its currently
> implemented in the latest versions
>
> IF interlv THEN
>                 tempj = j
>                 SHIFT RIGHT tempj , 3
>                 PTR = k * 80 + (j AND 7) * 10 + tempj + i * 2
>             ELSE
>                 PTR = k * 80 + j + i * 16
>             END IF
>   outdata(PTR) = b
>
>
> Is the WOLF source code available anywhere, and is interleaving implemented?
>
> Also, is there an option somewhere to generate a file or even a screen
> showing of the output bit pattern?
> Short of actually running WolfGUI with a test message, recording the output
> and comparing it with my generated sequence for the same message it's
> difficult to know if my software gives the right answers.
>
> Andy  G4JNT


-- 
73 Warren K2ORS
                WD2XGJ
                WD2XSH/23
                WE2XEB/2
                WE2XGR/1