Re: [Discuss-gnuradio] LDPC in GNURadio

[Johannes Demel]

Hi all,

would it be an option to add a specialized library to GR for LDPC code? 
'aff3ct' [0] would be one library that comes to my mind. Of course, they might 
have a different approach to decoders in general. Also, at this point this 
might be a "compile your own dependency" library. Anyways, it might be worth to 
have a look at it.

Cheers
Johannes

[0] https://github.com/aff3ct/aff3ct

________________________________________
Von: Discuss-gnuradio <address@hidden> im Auftrag von Philip Balister 
<address@hidden>
Gesendet: Donnerstag, 20. September 2018 03:43:20
An: Andrej Rode; Sylvain Munaut
Cc: GNURadio Discussion List
Betreff: Re: [Discuss-gnuradio] LDPC in GNURadio

On 09/19/2018 05:03 PM, Andrej Rode wrote:
> 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.

I didn't find an OpenEmbedded recipe for M4RI, but a quick look at the
source suggest it will be easy enough to create a recipe. Give me some
warning if you go this path and I'll work on the recipe.

Philip

>
> Cheers
> Andrej
>
>
>
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