Edge-segmented relay decoding method for multilateral low-density parity-check codes

Abstract

The invention belongs to the technical field of digital communication, and in particular relates to an edge-segmented relay decoding method of a multilateral low-density parity-check code. The edge-segmented relay decoding method of the multilateral low-density parity-check code of the present invention comprises the following steps: initializing the likelihood information RtoA, RtoB and the iteration counter, and setting the total number of decoding iterations; executing the decoding branch A ; Exchange likelihood information at the relay point R; execute the decoding branch B; exchange likelihood information at the relay point R; accumulate the iteration counter, if the iteration counter is less than the total number of iterations , then jump to the execution of decoding branch A and continue to execute, otherwise, judge the information bits to obtain the final decoding result. Compared with the traditional decoding method that starts from the "edge" perspective and does not distinguish between edge types, the technical solution of the present invention has better bit error rate performance, and can optimize the number of iterations under the premise of ensuring decoding accuracy, and improve code efficiency.

Description

technical field [0001] The invention belongs to the technical field of digital communication, and in particular relates to an edge-segmented relay decoding method of a multilateral low-density parity-check code. Background technique [0002] The 1948 paper "Mathematical Theory of Communication" (C.E.Shannon, A mathematical theory of communication [J], BST J, 1948, (27): 379-423, 623-656) proposed that channel coding technology can be used to improve the reliability of channel transmission , that is to say, the channel coding technology can make the bit error rate during transmission as low as possible. This serves as a milestone, which marks the emergence of information theory, which is called Shannon information theory in academic circles. [0003] Since the emergence of information theory, the research on channel coding has also continued to deepen. People have researched many "good codes". Among them, the multilateral low-density parity-check code (MET-LDPC) proposed by ...

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Problems solved by technology

However, the current research on the decoding of MET-LDPC codes still stays at the side view angle of traditional LDPC codes. When decoding, all sides are considered to be the same, and there is only one type of side, which does not take into account the low density of multi-sided types. The characteristics of the multilateral type of parity-check code and its three special structures, without starting from the degree distribution of the node perspective, focusing on the role of the division of edge types on decoding

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