Rate-Splitting Multiple Access for Dual-Functional Radar-Communication Satellite Systems

被引:17
|
作者
Yin, Longfei [1 ]
Clerckx, Bruno [1 ]
机构
[1] Imperial Coll London, Dept Elect & Elect Engn, London, England
来源
2022 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE (WCNC) | 2022年
关键词
Rate-splitting multiple access (RSMA); dual-functional radar-communication (DFRC); multibeam satellite systems; beamforming; bistatic MIMO radar; Cramer-Rao bound; MULTICAST; DESIGN;
D O I
10.1109/WCNC51071.2022.9771644
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
In this paper, we consider a multi-antenna dual-functional radar-communication (DFRC) satellite system, where the satellite has a dual capability to simultaneously communicate with downlink satellite users (SUs) and probe detection signals to a moving target. To design an appropriate DFRC waveform, we investigate the rate-splitting multiple access (RSMA)-assisted DFRC beamfoming, and employ the Cramer-Rao bound (CRB) as a radar performance metric, which represents a lower bound on the variance of unbiased estimators. The beamforming is optimized to minimize the CRB subject to quality of service (QoS) constraints of SUs and a per-feed transmit power budget. Satellite communication and detecting ground/sea objects in a bistatic mode are accomplished simultaneously using the DFRC waveform we designed. Simulation results demonstrate that the proposed RSMA-assisted DFRC beamforming outperforms the conventional space-division multiple access (SDMA) strategy in terms of the communication-sensing trade-off and target estimation performance in a multibeam satellite system.
引用
收藏
页码:1 / 6
页数:6
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