通信学报2026，Vol.47Issue(7)：51-64,14.DOI:10.11959/j.issn.1000-436x.TXXB260225
面向多目标感知的RSMA辅助ISAC系统鲁棒波束成形设计
Robust beamforming design for RSMA-ISAC systems oriented to multi-target sensing
摘要
Abstract
To address the degradation of beamforming performance caused by spectrum scarcity and imperfect channel state information in 6G systems,a robust beamforming design method was proposed for rate splitting multiple access(RSMA)-assisted integrated sensing and communication(ISAC)systems with multi-target sensing.Under the imperfect channel state information at the transmitter(CSIT)with a statistical error channel model,the radar sensing process was divided into target detection and target tracking stages.The Cramér-Rao bound(CRB)was adopted as the sensing metric,while the max-min average communication rate was employed as the fairness metric.Accordingly,a robust beamforming optimization problem for the RSMA-assisted ISAC system was formulated.To solve the uncertain non-convex optimiza-tion problem,a double-layer penalized iterative optimization algorithm based on sample average approximation(SAA)and successive convex approximation(SCA)was proposed.The original uncertain non-convex problem was transformed into a deterministic convex problem through SAA,semidefinite relaxation(SDR),and SCA methods.Simulation results demonstrate that,in the target tracking stage with M=2 and the signal-to-noise ratio(SNR)of 20 dB,the proposed scheme achieves approximately 14%improvement in user fair rate and 22%improvement in sensing accuracy compared with the space division multiple access(SDMA)-assisted ISAC scheme.关键词
通感一体化/速率分拆多址接入/波束成形设计/非完美信道状态信息Key words
integrated sensing and communication/rate splitting multiple access/beamforming design/imperfect chan-nel state information分类
信息技术与安全科学引用本文复制引用
董颖,蒋尊欢,唐红刚,王春悦..面向多目标感知的RSMA辅助ISAC系统鲁棒波束成形设计[J].通信学报,2026,47(7):51-64,14.基金项目
国家自然科学基金资助项目(No.62472194) （No.62472194）
吉林省科技发展计划基金资助项目(No.20230201016GX) The National Natural Science Foundation of China(No.62472194),The Science of Technology Department of Jilin Province(No.20230201016GX) （No.20230201016GX）
