移动通信2025，Vol.49Issue(9)：2-7,6.DOI:10.3969/j.issn.1006-1010.20250612-0001
基于多层成形polar编码的增量冻结HARQ方案
Incremental Freezing HARQ Scheme Based on Multilevel Shaped Polar Coding
摘要
Abstract
Constellation shaping generates Gaussian-like signal distributions,enabling communication systems to achieve transmission rates close to the Shannon capacity.With the ever-increasing demand for spectral efficiency in 6G communications,constellation shaping is expected to become a key technology in next-generation mobile systems.This paper investigates multilevel shaped polar-coded modulation with a focus on hybrid automatic repeat request(HARQ)scenarios.A multi-rate transmission scheme based on incremental freezing is proposed.Specifically,when retransmission occurs,unreliable bits from the previously transmitted block are extracted,reshaped,re-encoded,and sent in the subsequent block.At the receiver,these retransmitted bits are decoded in a last-in-first-out manner and treated as frozen bits for the decoding of subsequent blocks.Simulation results demonstrate that,compared with the uniform distribution case,the proposed scheme achieves at least a 0.5 dB performance gain across different numbers of transmissions.关键词
星座成形/polar码/多层编码/混合自动重传Key words
constellation shaping/polar codes/multilevel coding/hybrid automatic repeat request(HARQ)分类
信息技术与安全科学引用本文复制引用
袁瑞敏,刘凌,白宝明..基于多层成形polar编码的增量冻结HARQ方案[J].移动通信,2025,49(9):2-7,6.基金项目
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) （62171356）
国家重点研发计划"数学和应用研究"重点专项项目"面向未来无线通信信息处理若干关键问题的数学理论和方法"(2021YFA1000500) （2021YFA1000500）
