On Tue, Jun 16, 2015 at 11:41 PM, Tom Rondeau <t...@trondeau.com> wrote:
> On Tue, Jun 16, 2015 at 1:03 PM, bob wole <bnw...@gmail.com> wrote: > >> >> >>> On 16.06.2015 08:26, bob wole wrote: >>> > Hi, >>> > >>> > I just stared working on FEC in gnuradio. I found that there is >>> > gr-fec. I want to know that which literature , books/papers, was >>> > followed during the implementation of the gr-fec so that I can go >>> > through the c++ implementation more productively and add >>> > something. >>> > >>> > >>> > -- Bob >>> > >>> - >>> >>> > Hi, >>> > >>> > I just stared working on FEC in gnuradio. I found that there is >>> gr-fec. I >>> > want to know that which literature , books/papers, was followed during >>> the >>> > implementation of the gr-fec so that I can go through the c++ >>> > implementation more productively and add something. >>> > >>> > >>> > -- >>> > Bob >>> > >>> >>> Hi Bob, >>> >>> Have a look at the manual. The API itself is quite well described I >>> think: >>> >>> http://gnuradio.org/doc/doxygen/page_fec.html >>> >>> It doesn't cover the very recently added TPC and LDPC implementations. >>> http://gnuradio.org/doc/doxygen/classgr_1_1fec_1_1ldpc__decoder.html >>> http://gnuradio.org/doc/doxygen/classgr_1_1fec_1_1ldpc__decoder.html >>> http://gnuradio.org/doc/doxygen/classgr_1_1fec_1_1tpc__encoder.html >>> http://gnuradio.org/doc/doxygen/classgr_1_1fec_1_1tpc__decoder.html >>> >>> Those could use work on their documentation. >>> >>> We're also about to merge in another approach to LDPC encoding and >>> decoding >>> based on Tracie Perez's GSoC work. You can see the wip branch here: >>> >>> https://github.com/trondeau/gnuradio/tree/fec/ldpc_methods >>> >>> And the GSoC presentations: >>> http://www.trondeau.com/grcon2013-presentations#gsoc-perez >>> http://www.trondeau.com/grcon2013-presentations#gsoc-manu >>> >>> Johannes Demel is working on polar codes this summer. >>> >>> What's your particular interest in FEC? Are you looking to use it or >>> implement other codes not already in gr-fec? For the FEC API itself, >>> there >>> is no other reference than the manual page and a presentation from the >>> original author at our GRCons: >>> >>> http://www.trondeau.com/grcon14-presentations#tut-mccarthy >>> http://www.trondeau.com/grcon2013-presentations#tut-mccarthy >>> >>> Tom >>> >> >> Hi Tom, >> >> Thanks for the links. I am targeting Turbo Codes mainly for short frame >> size. I found one presentation on turbo codes >> >> >> http://gnuradio.squarespace.com/storage/grcon14/presentations/Sep18_02_Karra_TurboCodes.pdf >> >> but I could not find its source code in gnuradio. Are Turbo codes >> implemented in gnuradio? if yes, in which version can I find it? One more >> question, I am targeting short frame length burst, currently which FEC in >> gnuradio can give me best gain in this case? >> >> -- >> Bob >> > > Bob, > > Yes, Kiran's TPC work has been integrated as of 3.7.7.1. (I even pointed > out the links to the manual pages for the tpc_encoder and tpc_decoder > above.) > > Tom > > Thanks Tom, I am going to test them soon for my bursty system :) Lets see how it works. -- Bob
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