广东工业大学学报2025，Vol.42Issue(6)：95-103,9.DOI:10.12052/gdutxb.240087
RIS辅助RSMA通感一体化系统的波束赋形设计
Beamforming Design in RIS-assisted RSMA Integrated Sensing and Communication System
摘要
Abstract
An integrated sensing and communication system is expected to be a major application in 6G,but challenges remain in achieving efficient resource allocation and reducing interference between systems.Reconfigurable Intelligent Surfaces(RIS)and Rate-splitting Multiple Access(RSMA)are considered key technologies of 6G,offering potential solutions to these challenges.In this research,an RIS-assisted RSMA integrated sensing and communication system is proposed,introducing a framework for simultaneous communication and sensing using the same frequency spectrum.It explores rate-splitting and joint active-passive beamforming designs to enhance system performance and reduce interference while balancing communication and sensing needs.An optimization problem is formulated to maximize the minimum user rate under the constraint of an effective sensing power threshold.A joint optimization algorithm is proposed to solve this non-convex problem,utilizing a weighted minimum mean square error(WMMSE)approach to construct a rate-WMMSE relationship and employing block coordinate descent and successive convex approximation methods for variable decoupling and iterative solving.Simulation results show that the proposed algorithm achieves a significantly higher minimum user rate compared with other benchmark schemes under the same transmission power budget.This leads to a marked improvement in the fairness of user communications.关键词
通感一体化/可重构智能表面/速率分割多址/波束赋形Key words
integrated sensing and communication/reconfigurable intelligent surfaces(RIS)/rate-splitting multiple access(RSMA)/beamforming分类
电子信息工程引用本文复制引用
林颖,崔苗,张广驰..RIS辅助RSMA通感一体化系统的波束赋形设计[J].广东工业大学学报,2025,42(6):95-103,9.基金项目
广东省海洋经济发展资助项目(粤自然资合[2023]24号) （粤自然资合[2023]24号）
广东省科技计划项目(2023A0505050127,2022A0505020008,2022A0505050023) （2023A0505050127,2022A0505020008,2022A0505050023）
广东省基础与应用基础研究基金资助项目(2023A1515011980) （2023A1515011980）
江西省军民融合研究院"北斗+"项目子课题(2024JXRH0Y02) （2024JXRH0Y02）
