基于II型H-ARQ系统速率可变低密度校验码的设计与研究  

Design of rate-compatible low-density parity-check codes for type-II hybrid ARQ systems

作　　者：王单[1] 王新梅[1] 

机构地区：[1]西安电子科技大学ISN国家重点实验室,陕西西安710071

出　　处：《通信学报》2006年第1期59-63,共5页Journal on Communications

基　　金：国家自然科学基金资助项目(60272057;60496316;60502046)~~

摘　　要：构造了一类用于II型H-ARQ系统、具有Z字形结构校验矩阵、性能优良的速率可变低密度校验码(RC-LDPC)。将渐进边增长(progressiveedgegrowth)算法推广应用到RC-LDPC码的构造中,扩大了码率动态变化范围,提高了码的性能。仿真结果表明将此类RC-LDPC码应用于II型H-ARQ系统,可获得较高的吞吐量,且其校验矩阵的Z字形结构极大地降低了系统实现的复杂度。The design of powerful rate-compatible low-density parity-check codes （RC-LDPC） was constructed in zigzag structure for type-Ⅱ hybrid ARQ systems. The generalized PEG algorithm was used in the process of constructing RC-LDPC codes to improve the performance of the proposed codes. Simulation results show that based on constructed RC-LDPC codes, a type-Ⅱ hybrid ARQ system can achieve efficient throughput. In addition, very low-complexity encoding and decoding rules can be implemented due to the overall zigzag structure of these RC-LDPC codes.

关 键 词：速率可变码 低密度校验码 PEG算法 

分 类 号：TN911.22[电子电信—通信与信息系统]