Performance analysis of power-splitting relaying protocol in SWIPT based cooperative NOMA systems

Tran, Huu Q. ORCID logoORCID:, Phan, Ca V. and Vien, Quoc-Tuan ORCID logoORCID: (2021) Performance analysis of power-splitting relaying protocol in SWIPT based cooperative NOMA systems. EURASIP Journal on Wireless Communications and Networking, 2021 (110) . pp. 1-26. ISSN 1687-1499 [Article] (doi:10.1186/s13638-021-01981-9)

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This paper investigates a relay assisted simultaneous wireless information and power transfer (SWIPT) for downlink in cellular systems. Cooperative non-orthogonal multiple access (C-NOMA) is employed along with power splitting protocol to enable both energy harvesting (EH) and information processing (IP). A downlink model consists of a base station (BS) and two users is considered, in which the near user (NU) is selected as a relay to forward the received signal from the BS to the far user (FU). Maximum ratio combining is then employed at the FU to combine both the signals received from the BS and NU. Closed form expressions of outage probability, throughput, ergodic rate and energy efficiency (EE) are firstly derived for the SWIPT based C-NOMA considering both scenarios of with and without direct link between the BS and FU. The impacts of EH time, EH efficiency, power-splitting ratio, source data rate and distance between different nodes on the performance are then investigated. The simulation results show that the C-NOMA with direct link achieves an outperformed performance over C-NOMA without direct link. Moreover, the performance of C-NOMA with direct link is also higher than that for OMA. Specifically, (1) the outage probability for C-NOMA in both direct and relaying link cases is always lower than that for OMA. (2) the outage probability, throughput and ergodic rate vary according to β, (3) the EE of both users can obtain in SNR range of from -10 to 5 dB and it decreases linearly as SNR increases. Numerical results are provided to verify the findings.

Item Type: Article
Keywords (uncontrolled): Research, Non-orthogonal multiple access (NOMA), Energy harvesting (EH), Information processing (IP), Radio-frequency (RF), Power-splitting relaying (PSR), Decode-and-forward (DF)
Research Areas: A. > School of Science and Technology > Computer and Communications Engineering
Item ID: 33036
Notes on copyright: © The Author(s), 2021. Open Access
This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit
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Depositing User: Jisc Publications Router
Date Deposited: 30 Apr 2021 10:44
Last Modified: 30 Apr 2021 10:44

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