Energy-Efficient Optimization for Wireless Information and Power Transfer in Large-Scale MIMO Systems Employing Energy Beamforming

被引：196

作者：

Chen, Xiaoming ^{[1
,2
]}

Wang, Xiumin ^{[3
]}

Chen, Xianfu ^{[4
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Coll Elect & Informat Engn, Nanjing, Jiangsu, Peoples R China

[2] Southeast Univ, Natl Mobile Commun Res Lab, Nanjing, Jiangsu, Peoples R China

[3] Hefei Univ Technol, Sch Comp & Informat, Hefei, Peoples R China

[4] VTT Tech Res Ctr Finland, Oulu, Finland

来源：

IEEE WIRELESS COMMUNICATIONS LETTERS | 2013年 / 2卷 / 06期

基金：

国家教育部博士点专项基金资助;

关键词：

Energy-efficient resource allocation; wireless information and power transfer; large-scale MIMO system; energy beamforming; QoS guarantee;

D O I：

10.1109/WCL.2013.092813.130514

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 letter, we consider a large-scale multiple-input multiple-output (MIMO) system where the receiver should harvest energy from the transmitter by wireless power transfer to support its wireless information transmission. The energy beamforming in the large-scale MIMO system is utilized to address the challenging problem of long-distance wireless power transfer. Furthermore, considering the limitation of the power in such a system, this letter focuses on the maximization of the energy efficiency of information transmission (bit per Joule) while satisfying the quality-of-service (QoS) requirement, i.e. delay constraint, by jointly optimizing transfer duration and transmit power. By solving the optimization problem, we derive an energy-efficient resource allocation scheme. Numerical results validate the effectiveness of the proposed scheme.

引用

页码：667 / 670

页数：4

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