Low Complexity Wireless Powered Information Transfer Strategy for Multiuser MIMO Systems

被引：2
|
作者：
Choi, Jihoon [1 ]
Joung, Jingon [2 ]
机构：
[1] Korea Aerosp Univ, Sch Elect & Informat Engn, Goyang 10540, South Korea
[2] Chung Ang Univ, Sch Elect & Elect Engn, Seoul 06974, South Korea
来源：
IEEE ACCESS | 2018年 / 6卷
基金：
新加坡国家研究基金会;
关键词：
Wireless power transfer; multiuser; MIMO; zero-forcing; gradient method; COMMUNICATION; MAXIMIZATION;
D O I：
10.1109/ACCESS.2018.2879397
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
In this paper, the minimum achievable rate maximization problem for wireless-powered multiple users is investigated. Zero-forcing (ZF)-based precoding is considered for information transmission (IT) in the uplink from multi-antenna users to a multi-antenna access point that charges the users through wireless power transmission (PT) in the downlink. A max-min user rate optimization problem is formulated when a ZF-based transmission is used for spatial division multiplexing in the IT phase. We propose a low-complexity method to design the energy beamformer for the PT phase, the transmit power allocation for multi-stream transmission for the IT phase, and the time ratio between PT and IT phases in terms of maximizing the minimum achievable rate. The validity of the proposed scheme is shown through complexity analysis and numerical simulations.
引用
收藏
页码：68612 / 68620
页数：9
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