Joint Optimization in UAV-ground Communications Empowered by Multiple Aerial RISs

Jingyi Li, Jiadai Wang

科研成果: 书/报告/会议事项章节会议稿件同行评审

摘要

Being capable of controlling the radio environment well, the contemporary advanced technique, namely reconfigurable intelligent surface (RIS), has been expected to facilitate unmanned aerial vehicle (UAV) communications. The existing studies mainly focus on terrestrial RIS to realize communication performance improvement, which can achieve only half-space reflection and may experience serious signal attenuation brought by several reflections. Motivated by this reason, this paper proposes to install multiple aerial RISs on the balloons to cooperatively boost the received signal power at ground users. Based on this architecture, we jointly optimize UAV trajectory, active beamforming, and passive beamforming, so as to maximize the average system sum rate. Considering that the composite channel gain becomes a complex function of UAV trajectory in the presence of multiple RISs, the block coordinate descent method is developed to address the formulated optimization problem. The mathematical treatment involves three stages, which can be executed by an iterative algorithm. Finally, numerical results verify the competitive superiorities of multiple aerial RISs and the excellence of joint optimization design compared with other benchmark ones.

源语言英语
主期刊名2022 IEEE 23rd International Conference on High Performance Switching and Routing, HPSR 2022
出版商IEEE Computer Society
101-106
页数6
ISBN(电子版)9781665406079
DOI
出版状态已出版 - 2022
活动23rd IEEE International Conference on High Performance Switching and Routing, HPSR 2022 - Taicang, Jiangsu, 中国
期限: 6 6月 20228 6月 2022

出版系列

姓名IEEE International Conference on High Performance Switching and Routing, HPSR
2022-June
ISSN(印刷版)2325-5595
ISSN(电子版)2325-5609

会议

会议23rd IEEE International Conference on High Performance Switching and Routing, HPSR 2022
国家/地区中国
Taicang, Jiangsu
时期6/06/228/06/22

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