基于速率分割多址的索引调制系统及其性能分析

doi:10.12305/j.issn.1001-506X.2025.11.31

系统工程与电子技术 ›› 2025, Vol. 47 ›› Issue (11): 3844-3850.doi: 10.12305/j.issn.1001-506X.2025.11.31

• 通信与网络 • 上一篇

基于速率分割多址的索引调制系统及其性能分析

周围¹^,², 黄华¹^,²^,*(), 张艺¹^,², 向波², 杨瑜²

1. 重庆邮电大学通信与信息工程学院，重庆 400065
2. 重庆邮电大学移动通信技术重庆市重点实验室，重庆 400065

收稿日期:2025-04-02 出版日期:2025-11-25 发布日期:2025-12-08
通讯作者: 黄华 E-mail:1757856506@qq.com
作者简介:周　围（1971—），男，教授，硕士研究生导师，博士，主要研究方向为无线通信、阵列信号处理
张　艺（1999—），女，硕士研究生，主要研究方向为正交时频空
向　波（2001—），男，硕士研究生，主要研究方向为正交时频空、深度学习
杨　瑜（2000—），女，硕士研究生，主要研究方向为去蜂窝大规模多输入多输出
基金资助:
国家自然科学基金（61701062）；重庆市基础与前沿研究计划项目（cstc2019jcyj-msxmX0079）资助课题

Index modulation system based on rate-splitting multiple access and its performance analysis

Wei ZHOU¹^,², Hua HUANG¹^,²^,*(), Yi ZHANG¹^,², Bo XIANG², Yu YANG²

1. School of Communications and Information Engineering，Chongqing University of Posts and Telecommunications，Chongqing 400065，China
2. Chongqing Key Laboratory of Mobile Communications Technology，Chongqing University of Posts and Telecommunications，Chongqing 400065，China

Received:2025-04-02 Online:2025-11-25 Published:2025-12-08
Contact: Hua HUANG E-mail:1757856506@qq.com

摘要/Abstract

摘要：

速率分割多址（rate-splitting multiple access, RSMA）在频谱效率、能量效率等性能方面优于非正交多址（non-orthogonal multiple access, NOMA），是第六代（sixth generation, 6G）移动通信最有潜力的多址技术。索引调制（index modulation, IM）技术通过利用通信系统资源的索引来发送附加信息比特，可以提高系统的能量效率、频谱效率和误比特率性能。针对IM-NOMA系统频谱效率低的问题，首次将IM引入到RSMA中，提出了一个两用户单天线的IM-RSMA系统。该系统在正交频分复用（orthogonal frequency division multiplexing，OFDM）RSMA的基础上将子载波作为索引资源来发送额外的信息比特，在接收端提出了最大似然（maximum likelihood, ML）检测和接近ML性能的低复杂度对数似然比（log-likelihood ratio, LLR）检测。通过理论分析和仿真，对比了不同系统的性能，结果表明所提出的系统相较于现有的IM-NOMA在频谱效率和误比特率方面有着明显优势。

关键词: 速率分割多址, 索引调制, 频谱效率, 误比特率

Abstract:

Rate-splitting multiple access (RSMA) outperforming non-orthogonal multiple access (NOMA) in spectral efficiency and energy efficiency, stands as the most promising multiple access technology for sixth generation (6G) networks. Index modulation （IM） technology, which uses the index of communication system resources to send additional information bits, can improve the system’s energy efficiency, spectral efficiency, and bit error rate performance. To address the low spectral efficiency issue in IM-NOMA systems, IM is introduced into RSMA for the first time and an IM-RSMA system with two users and a single antenna is proposed. This system builds on orthogonal frequency division multiplexing （OFDM） RSMA by using subcarriers as index resources to transmit additional information bits. At the receiver end, it proposes maximum likelihood （ML） detection and low complexity log-likelihood ratio （LLR） detection that approaches ML performance. Through theoretical analysis and simulation, the performance of different systems is compared, and the results show that the proposed system has significant advantages over existing IM-NOMA in terms of spectral efficiency and bit error rate.

Key words: rate-splitting multiple access （RSMA）, index modulaiton （IM）, spectral efficiency, bit error rate

中图分类号:

TN 929.5

周围, 黄华, 张艺, 向波, 杨瑜. 基于速率分割多址的索引调制系统及其性能分析[J]. 系统工程与电子技术, 2025, 47(11): 3844-3850.

Wei ZHOU, Hua HUANG, Yi ZHANG, Bo XIANG, Yu YANG. Index modulation system based on rate-splitting multiple access and its performance analysis[J]. Systems Engineering and Electronics, 2025, 47(11): 3844-3850.

图/表 5

参考文献 17

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基于速率分割多址的索引调制系统及其性能分析

Index modulation system based on rate-splitting multiple access and its performance analysis

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