Abstract: For multi-component LDPC codes, the channel information based dynamic weighted multi-component LDPC decoding algorithm (CIW-AlgB) replaces the binary Hamming distance between hard decision information and external information in reliability calculation by considering the correlation reliability between the initial message from the channel and external information, and proposes a weighted correction coefficient based on channel information. The decoding algorithm can be dynamically weighted according to the channel information. Compared with the non-binary weighted symbol flipping algorithm, the proposed algorithm makes an effective compromise between decoding performance and decoding complexity. The simulation results show that compared with the weighted symbol flipping decoding algorithm, the proposed algorithm achieves significant performance improvement and has faster decoding convergence speed.

Key words: LDPC code, symbol flipping, channel, dynamic weighted