南京邮电大学学报（自然科学版）2025，Vol.45Issue(5)：31-41,11.DOI:10.14132/j.cnki.1673-5439.2025.05.004
基于RIS辅助的RSMA无蜂窝上行通信系统和速率优化算法
Sum-rate optimization for RIS-aided cell-free uplink communication systems with RSMA
摘要
Abstract
To address the challenges of environmental sensitivity in communication links and limited ter-minal access in cell-free communication systems,this paper introduces reconfigurable intelligent surface(RIS)and rate splitting multiple access(RSMA)technologies to assist communication.A sum-rate optimi-zation algorithm is proposed for RIS-aided cell-free uplink communication systems with RSMA.The algo-rithm aims to maximize the system sum-rate by jointly optimizing RIS passive beamforming,access point selection,power allocation of sub-messages,and decoding order.Given the non-convex nature of this dis-crete nonlinear programming problem,we decompose it into multiple subproblems and address them by al-ternatively using an optimization approach.First,a user-centric matching algorithm based on channel gain is used to obtain the optimal matching scheme.Second,the successive convex approximation(SCA)algo-rithm is used to solve the sub-message power distribution problem,and the Riemann conjugate gradient al-gorithm is utilized to solve the RIS passive beamforming problem.Third,a decoding order algorithm is de-veloped based on channel gain and the sub-message allocation ratio.Simulation results demonstrate that the proposed algorithm achieves superior sum-rate performance compared to traditional algorithms.关键词
智能反射面/速率分割多址/无蜂窝网络/和速率Key words
reconfigurable intelligent surface(RIS)/rate splitting multiple access(RSMA)/cell-free network/sum-rate分类
信息技术与安全科学引用本文复制引用
俞观晔,于佳,陈沛,杨仕钊,田雨露,朱晓荣..基于RIS辅助的RSMA无蜂窝上行通信系统和速率优化算法[J].南京邮电大学学报（自然科学版）,2025,45(5):31-41,11.基金项目
国家自然科学基金(92367102)资助项目 （92367102）
