Holographic Beamforming for LEO Satellites

被引：3
|
作者：
Hu, Xinyuan [1 ]
Deng, Ruoqi [1 ]
Di, Boya [1 ]
Zhang, Hongliang [1 ]
Song, Lingyang [1 ,2 ]
机构：
[1] Peking Univ, Sch Elect, State Key Lab Adv Opt Commun Syst & Networks, Beijing 100871, Peoples R China
[2] Peking Univ, Sch Elect & Comp Engn, Shenzhen Grad Sch, Shenzhen 518055, Peoples R China
来源：
IEEE COMMUNICATIONS LETTERS | 2023年 / 27卷 / 10期
基金：
北京市自然科学基金;
关键词：
Array signal processing; Satellite broadcasting; Low earth orbit satellites; Satellites; Satellite communication; Interference; Hardware; Reconfigurable holographic metasurface; holographic beamforming; LEO satellite communication;
D O I：
10.1109/LCOMM.2023.3301491
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
Low-earth-orbit (LEO) satellite communication networks are expected to provide global massive connectivity and high-speed data services for terrestrial users. Reconfigurable holographic surfaces (RHSs) can fulfill such vision by achieving holographic beamforming with low power consumption and hardware cost. In this letter, we consider an RHS-aided LEO satellite communication system, where a satellite equipped with an RHS broadcasts to multiple user terminals via holographic beamforming. To derive the minimum number of elements for RHS that can guarantee the system performance, we first develop a holographic beamforming optimization algorithm to maximize the sum rate, based on which the closed-form expression of the maximum sum rate is obtained. By comparing the RHS-aided system with the phased array-aided system, we then discuss the conditions when the RHS can achieve a higher sum rate than the phased array. Simulation results validate the theoretical analysis and show the RHS can meet the sum rate requirement of the LEO satellite communication system with low hardware cost.
引用
收藏
页码：2717 / 2721
页数：5
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