US 12,244,414 B1
Early termination in convolutional low density parity check decoding
Mehdi Karimi, San Jose, CA (US); Han Henry Sun, San Jose, CA (US); and Kuang-Tsan Wu, San Jose, CA (US)
Assigned to Infinera Corporation, Sunnyvale, CA (US)
Filed by Infinera Corporation, San Jose, CA (US)
Filed on Jul. 2, 2021, as Appl. No. 17/367,161.
Claims priority of provisional application 63/048,540, filed on Jul. 6, 2020.
Int. Cl. H03M 13/11 (2006.01); H04L 1/00 (2006.01)
CPC H04L 1/0057 (2013.01) [H03M 13/1102 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method comprising:
receiving, by a receiver, a communication signal comprising a plurality of symbols from a communication network;
providing the symbols to a decoder circuit of the receiver to decode the symbols;
determining whether a first subset of the symbols has an associated first fail check count, the first fail check count being based on first log likelihood ratio values in a base parity check matrix, the first log likelihood ratio values being associated with the first subset of the symbols;
in response to determining that the first subset of the symbols has no associated first fail check count based on the first log likelihood values, configuring a first termination parameter associated with the first subset of the symbols to have a first value;
determining whether a second subset of the symbols has an associated second fail check count, the second fail check count being based on second log likelihood ratio values in the base parity check matrix, the second log likelihood ratio values being associated with the second subset of the symbols;
in response to determining that the second subset of the symbols has no associated second fail check count based on the second log likelihood ratio value, configuring a second termination parameter associated with the second subset of the symbols to have a second value; and
terminating a decoding of the symbols by the decoder circuit in response to the second value of the second termination parameter associated with the second subset of the symbols and the first value of the first termination parameter associated with the first subset of the symbols being identical.