Hi Brian,
On 12/17/2018 7:28 PM, bagel W9BGL wrote:
Now that FT8 version 2 is released and the uptake on the new version is
very successful, I hope this is an appropriate time to ask questions of
the development team. I want to learn the details on the FT8 decoding
algorithms. I am reading the Fortran code, but there isn't a great
deal of comments explaining what is going on. Is there some documentation
somewhere with details?
73 Brian W9BGL
You don't mention any background or describe what you have already read,
so it's hard to give a clearly focused answer. Be sure to start with
Section 17, "Protocol Specifications" of the WSJT-X 2.0 User Guide:
http://www.physics.princeton.edu/pulsar/K1JT/wsjtx-doc/wsjtx-main-2.0.0.html#PROTOCOLS
Next I suggest exploring the "References" page on the WSJT web site:
http://www.physics.princeton.edu/pulsar/K1JT/wsjtx-doc/wsjtx-main-2.0.0.html#PROTOCOLS
You might want to pay particular attention to items 4, 6, 25, 28, and 30
on that page.
Finally, of course, for algorithmic details you'll need to read the
source code. We think it's pretty well documented, internally. But we
have made no special attempt to make it into a tutorial on either
digital signal processing or coding theory.
-- 73, Joe, K1JT
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