LDPC码研究现状与应用

Research Status and Application of LDPC Codes

低密度奇偶校验(LDPC)码是目前应用较为广泛的一类信道编码,由于它可以无限接近香农极限。阐述了LDPC码的基本概念及其类型和Tanner图的表示方式,分别介绍了LDPC码的构造方式、编码和译码算法的研究现状及优缺点。同时分析LDPC码在无线通信与光通信等领域的实际应用中存在的问题,并对未来的研究方向进行了详细的总结与展望。

Low density parity check （LDPC） code is a kind of channel coding which is widely used at present, because it can reach the Shannon limit infinitely. The basic concept and type of LDPC code and the representation of Tanner graph are expounded. The research status, advantages and disadvantages of LDPC code construction, coding and decoding algorithms are introduced. At the same time, it analyzes the problems existing in the practical application of LDPC codes in the fields of wireless communication and opfieal communication, and summarizes and forecasts the future research directions in detail.