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Mobile Information Systems
Volume 2016, Article ID 7281027, 9 pages
http://dx.doi.org/10.1155/2016/7281027
Research Article

Simultaneous Wireless Information and Power Transfer Mechanism in Interference Alignment Relay Networks

1Jiangxi Province Key Laboratory of Intelligent Information Systems, Nanchang University, Nanchang, China
2Information Engineering School, Nanchang University, Nanchang, China
3Queen Mary University of London, London, UK

Received 5 July 2016; Revised 20 September 2016; Accepted 29 September 2016

Academic Editor: Floriano Scioscia

Copyright © 2016 Fahui Wu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper considers a simultaneous wireless information and power transfer (SWIPT) mechanism in an interference alignment (IA) relay system, in which source nodes send wireless information and energy simultaneously to relay nodes, and relay nodes forward the received signal to destination nodes powered by harvested energy. To manage interference and utilize interference as energy source, two-SWIPT receiver is designed, namely, power splitting (PS), and antennas switching (AS) has been considered for relay system. The performance of AS- and PS-based IA relay systems is considered, as is a new energy cooperation (ECop) scheme that is proposed to improve system performance. Numerical results are provided to evaluate the performance of all schemes and it is shown from the simulations that the performance of proposed ECop outperformed both AS and PS.