面向6G的速率兼容空间耦合LDPC码设计  

Rate-Compatible Spatially Coupled LDPC Code Design for 6G

作　　者：王筝 方健 朱敏[1] 白宝明[1] WANG Zheng;FANG Jian;ZHU Min;BAI Baoming(State Key Laboratory of ISN,Xidian University,Xi'an 710071,China)

机构地区：[1]西安电子科技大学空天地一体化综合业务网全国重点实验室,陕西西安710071

出　　处：《移动通信》2025年第2期65-69,共5页Mobile Communications

基　　金：国家自然科学基金面上项目“面向星地融合的高效高可靠编码调制技术研究”(62171356);国家自然科学基金面上项目“超高吞吐超高可靠空间耦合码的设计优化及性能分析”(62271380)。

摘　　要：面向6G通信中的高可靠、低时延需求,提出了一种速率兼容的空间耦合LDPC码设计。SC-LDPC码具有逼近香农限的优异性能和结合滑窗译码能够达到的更低译码时延。然而,为了解决移动通信中码率灵活问题,提出了拆分QCLDPC码成SC-LDPC码的策略,同时结合PEXIT算法优化所构造的SC-LDPC码的译码门限;为了兼容5G LDPC码,选取5G LDPC码作为QC-LDPC码,从而设计出了速率兼容的SC-LDPC码。仿真结果表明,所设计的码字在多个码率下误码率性能均优于5G LDPC码。In response to the high reliability and low latency requirements in 6G communication,a rate-compatible spatially-coupled low-density parity-check(SC-LDPC)code design has been proposed.The SC-LDPC code exhibits excellent performance approaching the Shannon limit and achieves lower decoding latency when combined with sliding window decoding.Nevertheless,to address the issue of flexible code rates in mobile communication,a strategy of splitting QC-LDPC codes into SC-LDPC codes is proposed,and the decoding threshold of the constructed SC-LDPC codes is optimized via combining the PEXIT algorithm.To be compatible with 5G LDPC codes,5G LDPC codes are selected as QC-LDPC codes,thereby designing the rate-compatible SC-LDPC codes.Simulation results demonstrate that the designed codewords exhibit superior bit error rate performance compared to 5G LDPC codes at multiple code rates.

关 键 词：码构造 速率兼容 空间耦合LDPC码 

分 类 号：TN929.5[电子电信—通信与信息系统]