A power-splitting relaying protocol for wireless energy harvesting and information processing in NOMA systems

Tran, Huu Q., Nguyen, Tien-Tung, Phan, Ca V. and Vien, Quoc-Tuan ORCID: https://orcid.org/0000-0001-5490-904X (2019) A power-splitting relaying protocol for wireless energy harvesting and information processing in NOMA systems. IET Communications, 13 (14). pp. 2132-2140. ISSN 1751-8628 (doi:10.1049/iet-com.2018.5897)

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Abstract

Non-orthogonal multiple access (NOMA) along with cooperative communications have been recognized as promising candidates for the fifth generation (5G) wireless networks and have attracted many researchers. Every networked device however has its own limited power supply. To this extent, this paper investigates a power-splitting relaying (PSR) protocol for wireless energy harvesting and information processing in the NOMA systems to prolong the lifetime of the energy-constrained relay nodes in wireless networks so as to avail the ambient radio-frequency (RF) signal as well as to simultaneously harvest the energy and process the information. Decode-and-forward relaying is employed at the relay node where the energy from the received RF signal is harvested and exploited to forward the information to the destination. Specifically, the outage probability and ergodic rate of the PSR protocol are derived to realize the impacts of energy harvesting time, energy harvesting efficiency, power splitting ratio, source data rate, and the distance between nodes. It is also shown that an increased energy harvesting efficiency results in an enhanced performance and an outperformance in terms of the energy efficiency is achieved with the employment of the NOMA when compared to the conventional orthogonal multiple access. Numerical results are provided to verify the findings.

Item Type: Article
Research Areas: A. > School of Science and Technology > Computer and Communications Engineering
Item ID: 26716
Notes on copyright: This paper is a postprint of a paper submitted to and accepted for publication in IET Communications and is subject to Institution of Engineering and Technology Copyright. The copy of record is available at the IET Digital Library: https://doi.org/10.1049/iet-com.2018.5897
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Depositing User: Quoc-Tuan Vien
Date Deposited: 03 Jun 2019 09:23
Last Modified: 14 Aug 2019 19:09
URI: https://eprints.mdx.ac.uk/id/eprint/26716

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