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低密度校验码(Ldpc码)作为一种性能优良的应用型的纠错编码结构越来越引起人们的关注。介绍了其基本原理,分析了正则码的编码结构、置信传播译码算法,并简要介绍了两种不同的编码结构。
Low Density Parity Code (Ldpc code) is attracting more and more attention as an excellent error-correcting coding structure. The basic principle is introduced, the coding structure of regular codes and the belief propagation decoding algorithm are analyzed, and two different coding structures are introduced briefly.