无线电通信技术2025，Vol.51Issue(5)：951-958,8.DOI:10.3969/j.issn.1003-3114.2025.05.008
面向用户随机部署的RSMA有源RIS辅助通信系统性能研究
Performance of RSMA-based Active RIS-assisted Communication Systems with User Random Deployment
摘要
Abstract
Reconfigurable Intelligent Surface(RIS)and Rate Splitting Multiple Access(RSMA)technologies are two emerging communication techniques with broad prospects in future wireless systems.Active RIS(ARIS)has the advantage of overcoming the effects of multiplicative fading compared to Passive RIS(PRIS).The paper addresses the outage performance of ARIS-assisted RSMA systems under random deployment.Under Nakagami-m small-scale fading model in downlink,multiple users are randomly distributed within a semicircular region around ARIS and sorted by the distances between the users and ARIS.Taking the optimal phase shift for the furthest user as the entry point,a moment matching approach is employed to derive the shape and scale parameters associated with the cascaded channel power characteristic for each RSMA user.We derive a closed-form expression for the outage performance of the users,analyze the effect of the power splitting coefficients on the Outage Probability(OP),and obtain the diversity order and an ex-pression for the approximate OP.Simulation results show that the OP of a non-perfect phase-shifted user under ARIS-assistance is re-duced by 58%compared to the passive RIS-assisted system under a power budget of 50 dBm and a moderate amount of RIS elements.In addition,the power consumption of the user with the optimal phase shift is reduced by 53 dBm.关键词
有源可重构智能表面/速率分拆多址接入/中断概率/随机用户部署/分集阶数Key words
ARIS/RSMA/OP/random user deployment/diversity order分类
信息技术与安全科学引用本文复制引用
张亚宾,李素月,徐勇军..面向用户随机部署的RSMA有源RIS辅助通信系统性能研究[J].无线电通信技术,2025,51(5):951-958,8.基金项目
国家自然科学基金面上项目(62271094) （62271094）
山西省回国留学人员科研资助项目(2022-162)General Program of National Natural Science Foundation of China(62271094) （2022-162）
Shanxi Scholarship Council of China through Research Project(2022-162) （2022-162）
