论文部分内容阅读
随着光通信系统的迅速发展,低密度奇偶校验(Low-Density Parity-Check,LDPC)码因其纠错能力强、构造方法灵活、译码复杂度低等优点而成为光通信系统中的研究与应用热点。由于LDPC码纠错性能主要取决于其校验矩阵的构造,因而文章针对适用于光通信系统中LDPC码的校验矩阵构造方法展开了综述性研究。文章从LDPC码的概念、校验矩阵及其Tanner图表达方式、影响LDPC码性能的因素以及LDPC码的随机构造方法和结构化构造方法等方面,综述了光通信系统中LDPC码构造方法的研究进展。分析总结了目前适用于光通信系统中LDPC码构造方法研究中亟待解决的关键问题,为今后深入开展相关研究提供理论指导。
With the rapid development of optical communication systems, Low-Density Parity-Check (LDPC) codes have become a promising solution for optical communication systems because of their strong error-correcting capability, flexible construction method and low decoding complexity Research and application of hot spots. Since the error correction performance of LDPC codes mainly depends on the structure of its parity check matrix, the article has carried on the comprehensive research to the construction method of the parity check matrix suitable for the LDPC code in the optical communication system. In this paper, the construction of LDPC codes in optical communication systems is reviewed from the aspects of the concept of LDPC codes, the expression of parity check matrix and its Tanner graph, the factors affecting the performance of LDPC codes and the stochastic and LDPC codes. progress. The key problems which are urgently needed to be solved in the research of LDPC codes in optical communication system are analyzed and summarized, which will provide theoretical guidance for further research.