面向6G的LDPC编码调制优化方案  

LDPC Coding and Modulation Optimization for 6G

作　　者：姚健 姜大洁 史斯豪 邬华明 秦飞 YAO Jian;JIANG Dajie;SHI Sihao;WU Huaming;QIN Fei(vivo Mobile Communication Co.,Ltd.,Beijing,100015)

机构地区：[1]维沃移动通信有限公司,北京100015

出　　处：《移动通信》2025年第2期11-18,共8页Mobile Communications

基　　金：国家科技重大专项“6G无线空口与接入网设计及标准研究”(2024ZD1300500)。

摘　　要：6G系统将支持超高吞吐量的数据传输以满足沉浸式通信场景的通信需求,因而不可避免地需要采用高阶调制方式。以LDPC码为基础分析了编码调制技术,针对高阶调制时不同调制比特位可靠性的差异,综合考虑编码链路实现的复杂度以及硬件资源开销,提出一种适合工程实现的编码调制联合优化方案。给出了具体的编码处理流程和基于信道容量的码率分配方案,首先对信息比特分组,然后每个分组按照不同码率独立进行LDPC编码,最后通过交织处理将不同分组的编码比特映射到不同可靠性的调制比特子信道。仿真结果表明,LDPC编码调制优化方案相比于5G系统的LDPC编码方案提升了衰落信道下的数据传输性能。The 6G system will support ultra-high throughput data transmission to meet the requirements of immersive communication usage scenario,thus inevitably necessitating the adoption of high-order modulation.Based on LDPC codes,the coding and modulation technologies are analyzed with the consideration of the varying reliability of different modulation bits during high-order modulation.Via comprehensively taking into account the implementation complexity and the issue of hardware resource overhead for the coding link,a joint optimization scheme for coding and modulation suitable for engineering implementation is proposed.The specific encoding process is provided as well as a channel capacity-based rate allocation scheme.First,the information bits are grouped and then each group independently performs the LDPC encoding based on different code rates.Finally,the information bits are mapped to modulation bit subchannels with varying reliability through interleaving.Simulation results demonstrate that the proposed scheme improves the performance of data transmission in fading channels compared to the LDPC coding scheme in 5G systems.

关 键 词：6G LDPC 高阶调制 信道容量 码率分配 

分 类 号：TN929.5[电子电信—通信与信息系统]