Paper Info
Title
Holographic MIMO for LEO Satellite Communications Aided by Reconfigurable Holographic Surfaces
Abstract
Ultra-dense low-Earth-orbit (LEO) satellite communication networks have significant potential for providing high-speed data services. To compensate the severe path loss in satellite communications, a key conceptual enabler is the holographic multiple input multiple output (HMIMO) with a spatially continuous aperture which can achieve a high directive gain with a small antenna size. In this paper, we consider a novel metamaterial antenna called a reconfigurable holographic surface (RHS) integrated with a user terminal (UT) to support LEO satellite communications. Composing of densely packing sub-wavelength metamaterial elements, the RHS can realize continuous or quasi-continuous apertures and provide a practical way towards the implementation of HMIMO. To obtain the desired beam directions towards the satellites, we propose a LEO satellite tracking scheme based on the temporal variation law such that frequent satellite positioning can be avoided. A holographic beamforming algorithm for sum rate maximization is then developed where a closed-form for the optimal holographic beamformer is derived. The robustness of the algorithm against the tracking errors of the satellites’ positions is also proved. Simulation results verify the theoretical analysis and show that the RHS outperforms the traditional phased array of the same physical dimension in terms of the sum rate when the compact element spacing of the RHS leads to much more RHS elements. Moreover, the RHS also provides a more cost-effective solution for pursuing high data rate compared with the phased array.
Year
DOI
Venue
2022
10.1109/JSAC.2022.3196110
IEEE Journal on Selected Areas in Communications
Keywords
DocType
Volume
Reconfigurable holographic surface,holographic beamforming,LEO satellite communication
Journal
40
Issue
ISSN
Citations 
10
0733-8716
0
PageRank 
References 
Authors
0.34
21
5
Name
Order
Citations
PageRank
r deng100.34
Boya Di251844.66
Hongliang Zhang357747.71
H. V. Poor4254111951.66
Lingyang Song53674238.94