Reference : Hybrid A/D Precoding for Downlink Massive MIMO in LEO Satellite Communications
Scientific congresses, symposiums and conference proceedings : Paper published in a book
Engineering, computing & technology : Computer science
Security, Reliability and Trust
http://hdl.handle.net/10993/49274
Hybrid A/D Precoding for Downlink Massive MIMO in LEO Satellite Communications
English
Qiang, Xiaoyu []
You, Li []
Li, Ke-Xin []
Tsinos, Christos mailto [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > >]
Wang, Wenjin []
Gao, Xiqi []
Ottersten, Björn mailto [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > >]
9-Jul-2021
2021 IEEE International Conference on Communications Workshops (ICC Workshops)
IEEE
Yes
Yes
International
978-1-7281-9441-7
2021 IEEE International Conference on Communications Workshops (ICC Workshops)
14-06-2021 to 23-06-2021
Montreal
QC, Canada
[en] In this paper, we develop hybrid analog/digital precoding based on the fully-connected architecture for massive multiple-input multiple-output (MIMO) low earth orbit (LEO) satellite communications (SATCOM), by exploiting the statistical channel state information (CSI) at the transmitter. The hybrid precoder design is formulated as an energy efficiency (EE) maximization problem by considering both continuous and discrete phase shift networks for implementing the analog precoder. The resulting optimization problem is nonconvex and difficult to solve. To that end, first, we apply a closed-form tight upper bound to approximate the ergodic rate. Then, we adopt Dinkelbach's algorithm and the iteratively weighted minimum mean-square error (WMMSE) method to obtain the fully digital precoders. After that, the alternating minimization and inexact majorization-minimization (MM) algorithms are utilized to compute the hybrid precoders. Simulation results show that the proposed algorithmic solutions achieve significant performance gains when compared to existing literature ones, especially in the case where the discrete phase shift network is employed for analog precoding.
http://hdl.handle.net/10993/49274
10.1109/ICCWorkshops50388.2021.9473680

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