RIS-Aided LEO SatCom with LEO-GEO Inter-System Interference Mitigation: Joint Multi-Satellite Multi-RIS Beamforming

The growing interest in deploying satellite communication (SatCom) systems results in a proliferation of both Geostationary Earth Orbit (GEO) and Low Earth Orbit (LEO) satellites, leading to the risk of inter-system interference between GEO and LEO systems, which can result in degraded communication...

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Bibliographic Details
Published inIEEE Wireless Communications and Networking Conference : [proceedings] : WCNC pp. 1 - 6
Main Authors Zheng, Ziyuan, Jing, Wenpeng, Lu, Zhaoming, Wen, Xiangming, Li, Wei
Format Conference Proceeding
LanguageEnglish
Published IEEE 21.04.2024
Subjects
Array signal processing
cooperative beamforming
Earth
Interference
interference mitigation
Low Earth Orbit satellite communication systems
Low earth orbit satellites
Planetary orbits
reconfigurable intelligent surface
Satellites
spectrum sharing
Transforms
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Summary:The growing interest in deploying satellite communication (SatCom) systems results in a proliferation of both Geostationary Earth Orbit (GEO) and Low Earth Orbit (LEO) satellites, leading to the risk of inter-system interference between GEO and LEO systems, which can result in degraded communication performance or even complete system failure. Under this context, this paper investigates Reconfigurable Intelligent Surface (RIS)-aided LEO SatCom with LEO-GEO inter-system interference mitigation. Specifically, multiple satellites and multiple RISs are operated in a cooperative manner with properly designed joint beamforming. We formulate a minimum signal-to-interference-plus-noise (SINR) maximization problem exploiting statistical channel state information (CSI), subject to LEO-GEO interference mitigation constraint. We propose an alternating optimization (AO)-based algorithm, combined with quadratic transform and manifold optimization techniques, to design the cooperative multi-satellite multi-RIS beamforming iteratively. Numerical results show that the proposed scheme ensures the mitigation of LEO-GEO interference while effectively improving the performance of LEO SatCom.
ISSN:1558-2612
DOI:10.1109/WCNC57260.2024.10570610