Re: LF: WOLF Coding

[Markus Vester <markusvester@aol.com>]

Hi Andy,

 

Wolf shows a link to the WOLF source on his website:

 http://www.qsl.net/dl4yhf/wolf/wolf_source.zip

The encoding and decoding process should be in the wolf.cpp file.

 

Best 73,

Markus

 

 

-----Ursprüngliche Mitteilung----- 
Von: Andy Talbot <andy.g4jnt@gmail.com>
An: rsgb_lf_group <rsgb_lf_group@yahoogroups.co.uk>; rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: Mo, 1 Feb 2016 6:21 pm
Betreff: LF: WOLF Coding

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