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Re: [Discuss-gnuradio] LDPC in GNURadio

From: Andrej Rode
Subject: Re: [Discuss-gnuradio] LDPC in GNURadio
Date: Wed, 19 Sep 2018 17:03:37 -0700
User-agent: Mutt/1.10.1 (2018-07-13)

Hi Sylvain, 

thanks for you thorough look into the state of the LDPC encoder/decoder.
I just skip the long text of wall and answer your questions from my
point of view:

> So my questions would be :
> (1) Is cleaning up the mess worth it ?

I personally would like to see the FEC module cleaned up a bit. There is also a
viterbi decoder in gr-trellis which would be perfectly fine in gr-fec
and using the gr-fec API. Maybe even porting in the specialized LDPC for
gr-dtv would be possible for the parameters used in gr-dtv. (which does
not mean you have to do so)

> (2) Is completely breaking the API of those blocks acceptable ?

For post-3.8 releases breaking the API for these blocks (and integrating
them into the FEC API if they're not already there would be a big plus)

> (3) Is adding a dependency to M4RI library to gnuradio acceptable ?
> (possibly optional one, disabling LDPC if not present).

Looking at M4RI is available in Ubuntu, Fedora and is probably easy to
add to other Linux distributions/Windows etc etc. 
It is "only" a math library and has no dependencies beside libc. 


Andrej Rode
GPG Key: 750B CBBB 4A75 811A 4D5F 03ED 5C23 7FB8 9A7D A2AA

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