Systems and methods for on-demand exchange of extrinsic information in iterative decoders

摘要

Systems and methods are provided for decoding a codeword using an iterative decoding process. The systems and methods include receiving a codeword comprising a plurality of symbols, and concurrently processing the received codeword with a detector and a decoder based in part on extrinsic information associated with the plurality of symbols to obtain updated extrinsic information. The systems and methods further include modifying the extrinsic information associated with the plurality of symbols based on the updated extrinsic information, and repeating the processing and modifying steps until a stopping criterion is met.

主权项

1. A method for decoding a first codeword using an iterative decoding process, the method comprising:
receiving the first codeword, wherein the first codeword comprises a plurality of symbols; concurrently processing the received first codeword with a detector and a decoder based in part on extrinsic information associated with the plurality of symbols to obtain updated extrinsic information; modifying the extrinsic information associated with the plurality of symbols based on the updated extrinsic information; repeating the processing and modifying steps for one or more iterations; identifying that the detector and the decoder are about to access extrinsic information corresponding to a common set of symbols; in response to the identifying, stalling the decoder while the detector processes the extrinsic information corresponding to the common set of symbols; predicting that the decoder will reach convergence for the first codeword; and in response to the predicting, causing the detector to process a second codeword while the decoder continues to process the first codeword.