Non-orthogonal multiple access schemes with partial relay selection
Article
Lee, S., Da Costa, D., Vien, Q., Duong, T. and De Sousa Jr., R. 2017. Non-orthogonal multiple access schemes with partial relay selection. IET Communications. 11 (6), pp. 846-854. https://doi.org/10.1049/iet-com.2016.0836
Type | Article |
---|---|
Title | Non-orthogonal multiple access schemes with partial relay selection |
Authors | Lee, S., Da Costa, D., Vien, Q., Duong, T. and De Sousa Jr., R. |
Abstract | In this paper, non-orthogonal multiple access (NOMA) in amplify-and-forward relay systems with partial relay selection (PRS) is investigated. More specifically, new exact closed-form expressions for the outage probabilities at two users are derived, based on which an asymptotic analysis at high signal- to-noise ratio (SNR) is carried out. Additionally, in order to investigate the performance gap between the NOMA and orthogonal multiple access (OMA) schemes, a closed-form approximate expression at high SNR for the sum rate is derived. Furthermore, relying on our results, the impact of the PRS on the sum rate and outage probability of the proposed NOMA scheme is examined. In particular, the derived asymptotic expressions show that the proposed scheme can improve over the traditional OMA not only the sum rate but also the user fairness. Finally, simulation results are presented to corroborate the analytical results. |
Keywords | relay networks (telecommunication); multi-access systems; amplify and forward communication; probability; telecommunication network reliability ; nonorthogonal multiple access schemes; partial relay selection ; NOMA; amplify-and-forward relay systems; PRS ; exact closed-form expressions ; outage probabilities ; asymptotic analysis ; signal-to-noise ratio ; SNR ; closed-form approximate expression ; asymptotic expressions |
Publisher | The Institution of Engineering and Technology (IET) |
Wiley | |
Journal | IET Communications |
ISSN | 1751-8628 |
Electronic | 1751-8636 |
Publication dates | |
Online | 21 Dec 2016 |
11 May 2017 | |
Publication process dates | |
Deposited | 12 May 2017 |
Accepted | 18 Dec 2016 |
Output status | Published |
Accepted author manuscript | |
Copyright Statement | 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 IET Digital Library: http://digital-library.theiet.org/content/journals/10.1049/iet-com.2... |
Digital Object Identifier (DOI) | https://doi.org/10.1049/iet-com.2016.0836 |
Web of Science identifier | WOS:000400847500010 |
Language | English |
https://repository.mdx.ac.uk/item/86z1w
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