中短码长的率匹配多进制LDPC码设计.pdfVIP

2012年第10期，第 45卷 通 信 技 术 Vol.45，No.10,2012 总第250期 Communications Technology No.250,Totally 中短码长的率匹配多进制 LDPC 码研究设计 尚培培， 徐家品 （四川大学 电子信息学院，四川 成都 610064） 【摘 要】该课题研究构造了纠错能力强、编译码复杂度低的中短码长的率匹配多进制LDPC码。提出 了一种校验位高效编码删余算法，以得到高性能的多进制 RC-LDPC 码。该删余算法以设计的高性能中短码 长、中等码率（1/2 码率）的多进制 LDPC 母码为基础，采用高效的结构化编码删余算法，实现比较宽的速 率范围（例如1/10 到 9/10）内设计高性能的纠错码。仿真结果表明，此算法性能优于传统的随机删余和节 点分组与排序删余算法。 【关键词】中等码率；多进制LDPC码；率匹配；删余算法 【中图分类号】TN911 【文献标识码】A 【文章编号】1002-0802(2012)10-0006-02 On Several Kinds of Non-binary Rate-compatible LDPC Codes SHANG Pei-pei， XU Jia-pin (College of Electronics and Information Engineering, Sichuan University, Chengdu Sichuan 610064, China) 【Abstract】Several kinds of non-binary rate-compatible LDPC codes with strong error-detecting ability and low complexity in encoding and decoding are studied and constructed. An efficient punctured encoding algorithm of parity bit is proposed, thus to get high-performance non-binary RC-LDPC codes. The punctured algorithm, based on the non-binary mother code with high performance and medium bit rate (1/2 rate), adopts efficient structured punctured algorithm and designs the high-performance error correction codes in a wide rate range (for example, from 1/10 to 9/10). The simulation results indicate that this algorithm is better in performance than the conventional random puncturing algorithm and the puncturing algorithm based on node grouping and sorting. 【Key words】medium bit rate; non-binary LDPC codes; rate-compatible; punctured algorithm 0 引言 刚起