摘要
累加交叉并行级联单奇偶校验(A-CPSPC)码是一种新的纠错编码,其编码结构简单并具有较好的误比特率性能。该文针对A-CPSPC码的局部编码结构提出了一种低复杂度的最大后验(MAP)局部译码算法,该方法利用基于双向消息传递原则的和积算法(SPA)进行局部译码,消除了短环对局部译码性能的影响。分析及仿真表明,传统的置信传播算法并不适用于A-CPSPC码,该文提出的局部译码算法与基于BCJR算法的局部译码算法的性能一致,且复杂度更低。
Accumulated-Crossover Parallel-concatenated SPC (A-CPSPC) Codes, which have good bit error rate performance and simple encoding structure, is a class of novel error-correcting codes. A Maximum A Posteriori (MAP) algorithm based on the Sum-Product Algorithm (SPA), is proposed to solve the local decoding, and to eliminate the effect of short cycles. Analysis and simulation results show that the conventional Belief Propagation (BP) decoding algorithm is not suitable for A-CPSPC codes, and the proposed local decoding algorithm can achieve the same performance as the one based on the BCJR algorithm, but has much lower complexity.
出处
《电子与信息学报》
EI
CSCD
北大核心
2009年第9期2143-2147,共5页
Journal of Electronics & Information Technology
基金
国家863计划项目(2007AA01Z288)
高等学校创新引智计划(B08038)资助课题
关键词
低密度奇偶校验码
并行级联
单奇偶校验码
交叉器
最大后验译码
Low-Density Parity-Check(LDPC) codes
Parallel concatenation
SPC codes
Crossover structure
Maximum A Posteriori(MAP) decoding