All, Since last week below (CCSDS LDPC Rate 1/2 OOT Decoder), I have just also added a DVB-S2 Rate 1/2 LDPC decoder and associated Encoder/Decoder flowgraph to my gr-aff3ct_codes repository:
1. For the DVB-S2 Rate 1/2 LDPC Decoder (64800,32400), I again used the AFF3CT C++ Library 2. For the DVB-S2 Encoder, I used the GNU Radio In-Tree DVB-S2 LDPC Encoder block https://github.com/DavidToddMiller/gr-aff3ct_codes Regards, Dave ------------------------------ *From*: Dave Miller *Subject*: RE: LDPC Decoder block API change *Date*: Tue, 25 Jul 2023 21:58:50 -0400 ------------------------------ Jeff, I have implemented a GNU Radio OOT block for a CCSDS rate 1/2 LDPC Decoder. I did not even try to use the current GNU Radio In-Tree LDPC decoder block because others have noted that the In-Tree LDPC decoder has issues: 1. I used the MIT AFF3CT C++ library as noted on my OOT site for the decoder on github: gr-aff3ct_codes - An AFF3CT library approach for a LDPC decoder was also noted by Daniel Estevez (gr-satellites) in his Orion/Moon Link analyses/articles in late CY2022. 2. The AFF3CT C++ library may open up many other decoder options also for GNU Radio decoders. 3. However, I did use the GNU Radio In-Tree LDPC Encoder Block for my CCSDS Rate 1/2 LDPC Encoder. Regards, Dave Miller ---------------------------------------------------------------------------------------------------- ------------------------------ *From*: Jeff Long *Subject*: LDPC Decoder block API change *Date*: Tue, 25 Jul 2023 18:32:26 -0400 ------------------------------ Does anyone use the LDPC Decoder block? PR https://github.com/gnuradio/gnuradio/pull/6748 will remove a param, changing the API. Normally we wouldn't do this, but best we can tell, the block is currently broken and unused.
