NDLI: Multiuser Two-Way Relaying with Large-Scale Antenna Arrays and Energy Harvesting

Content Provider	Springer Nature Link
Author	Fang, Zhaoxi Liang, Feng Li, Jun Jin, Liping Liu, Yutian
Copyright Year	2016
Abstract	This paper considers an energy-harvesting multiuser cellular two-way relay channel (EH-cTWRC), where multiple energy-harvesting users exchange information with a base station (BS) via a relay station (RS). Both the BS and the RS are powerful infrastructures equipped with a very large antenna array, while the energy-constrained users are equipped with a single antenna and harvest energy from the RS. We propose a three-phase harvest-decode-and-forward (HDF) relaying protocol for the considered EH-cTWRC. In the first phase, the RS transfers energy to the mobile users. With the harvested power and their inherent power supply, the users exchange information with the BS via the RS in the second and third phases using a low-complexity antenna-selection based decode-and-forward relaying scheme. We analyze performance of the proposed HDF scheme, and derive closed-form asymptotic expressions for the signal-to-interference-plus-noise ratio and the achievable sum-rate when the numbers of antennas at the BS and the RS become large. We investigate the optimal power allocation at the RS to maximize the achievable sum-rate. A low-complexity suboptimal power allocation scheme with closed-form expression is also proposed. Both analytical and numerical results show that large antenna arrays can improve the spectral efficiency and wireless power transfer efficiency significantly.
Starting Page	1299
Ending Page	1315
Page Count	17
File Format	PDF
ISSN	09296212
Journal	Wireless Personal Communications
Volume Number	95
Issue Number	2
e-ISSN	1572834X
Language	English
Publisher	Springer US
Publisher Date	2016-10-27
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Multiuser two-way relaying Large antenna array Energy harvesting Sum-rate Communications Engineering, Networks Signal,Image and Speech Processing Computer Communication Networks
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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