Transmission strategies for wireless powered MIMO relay systems

doi:10.1016/S1005-8885(17)60181-X

JOURNAL OF CHINA UNIVERSITIES OF POSTS AND TELECOM ›› 2017, Vol. 24 ›› Issue (1): 1-10.doi: 10.1016/S1005-8885(17)60181-X

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Transmission strategies for wireless powered MIMO relay systems

Wu Fahui, Xiao Lin, Yang Dingcheng, Laurie Cuthbert

1. Jiangxi Province Key Laboratory of Intelligent Information Systems, Nanchang University
2. Information Engineering School, Nanchang University
3. Information Systems Research Centre, Macao Polytechnic Institute

Received:2016-10-11 Revised:2016-12-23 Online:2017-02-28 Published:2017-02-28
Supported by:
This work was supported by the National Natural Science Foundation of China (61461029, 61362009, 61561032), the Natural Science Foundation of Jiangxi Province (20114ACE00200, 20153BCB23020, 20162BCB23010, 20161BAB202043), the China Postdoctoral Science Foundation Funded Project (2014MT561879, 2015T80692).

Abstract

Abstract: This paper studies a multiple input multiple output (MIMO) simultaneous wireless information and power transfer (SWIPT) relay system, in which the source node (SN) send information and energy simultaneously to the relay node (RN), and the RN forward the received signal to the destination node (DN) powered by harvested energy. In particular, we consider two SWIPT receiver designs, namely power splitting (PS) and antenna switching (AS) in the relay system. For each design, iterative algorithms based on convex optimization technique are proposed to maximize the system rate. Furthermore, in order to strike a balance between computational complexity and system performance, based on the AS scheme, we propose a low complexity optimization method for PS scheme where a suboptimal PS ratio is given. Numerical results are provided to evaluate the performance of the proposed algorithm for MIMO SWIPT relay systems. It is shown that the performance of the proposed suboptimal method approaches that of the optimal PS scheme.

Key words: SWIPT, energy harvesting, relay, power splitting, antennas switching

CLC Number:

TN925

Wu Fahui, Xiao Lin, Yang Dingcheng, Laurie Cuthbert. Transmission strategies for wireless powered MIMO relay systems[J]. JOURNAL OF CHINA UNIVERSITIES OF POSTS AND TELECOM, 2017, 24(1): 1-10.

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Transmission strategies for wireless powered MIMO relay systems

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