移动通信2026，Vol.50Issue(5)：51-59,66,10.DOI:10.3969/j.issn.1006-1010.20260308-0001
5G-LDPC码编码调制重传的交织优化
Interleaving Optimization for Coded Modulation Retransmission in 5 G-LDPC Systems
摘要
Abstract
For the hybrid automatic repeat request mechanism of low-density parity-check(LDPC)codes,this paper investigates coded modulation and interleaving optimization in 5G systems.First,the rate matching and existing interleaving methods in 5G systems are analyzed.The protograph-based extrinsic information transfer(PEXIT)algorithm is then used to conduct theoretical analysis and threshold calculation for retransmission interleaving methods,and the impact of interleaving methods under multiple retransmissions with different coded modulation schemes on reception performance is further explored.Then,based on the PEXIT algorithm,an interleaving optimization algorithm is proposed for different redundancy versions,including RV0,RV1,RV2,and RV3,to improve the overall reception performance.Simulation results show that,by optimizing the interleaving method,the data from different redundancy versions can achieve a performance gain of 0.2～0.5 dB during combined decoding,thereby significantly improving the transmission performance of high-order modulation retransmission systems and providing a new idea and implementation method for the design of coded modulation schemes with multiple retransmissions in 5G and future 6G communication systems.关键词
低密度奇偶校验码/交织优化/PEXIT算法Key words
low-density parity-check code/interleaving optimization/PEXIT algorithm分类
信息技术与安全科学引用本文复制引用
仲锌宇,顾鹏宇,姜明,王强..5G-LDPC码编码调制重传的交织优化[J].移动通信,2026,50(5):51-59,66,10.基金项目
国家自然科学基金资助项目"面向6G的中短码长弹性编码理论与方法"(62331002) （62331002）
