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Sensors 2019, 19(6), 1293; https://doi.org/10.3390/s19061293

Exploiting Impact of Hardware Impairments in NOMA: Adaptive Transmission Mode in FD/HD and Application in Internet-of-Things

1
Faculty of Electronics Technology, Industrial University of Ho Chi Minh City (IUH), Ho Chi Minh City 700000, Vietnam
2
Wireless Communications Research Group, Faculty of Electrical and Electronics Engineering, Ton Duc Thang University, Ho Chi Minh City 700000, Vietnam
3
VSB—Technical University of Ostrava, 17. listopadu 15, 708 00 Ostrava, Czech Republic
*
Author to whom correspondence should be addressed.
Received: 6 January 2019 / Revised: 12 February 2019 / Accepted: 8 March 2019 / Published: 14 March 2019
(This article belongs to the Special Issue Internet of Things and Machine-to-Machine Communication)
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Abstract

In this paper, a cooperative non-orthogonal multiple access (NOMA) system is studied for the Internet-of-Things (IoT) in which a master node intends to serve multiple client nodes. The adaptive transmission strategy is proposed at the relay node, i.e., the relay can be half-duplex (HD) and/or full duplex (FD). In practical terms, numerous low-cost devices are deployed in such IoT systems and it exhibits degraded performance due to hardware imperfections. In particular, the effects of hardware impairments in the NOMA users are investigated. Specifically, the closed-form expressions are derived for the outage probability. Moreover, the ergodic capacity is also analysed. This study also comparatively analyzes the orthogonal multiple access (OMA) and NOMA with HD and/or FD relaying. The numerical results are corroborated through Monte Carlo simulations. View Full-Text
Keywords: non-orthogonal multiple access; full-duplex; outage probability non-orthogonal multiple access; full-duplex; outage probability
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Le, C.-B.; Do, D.-T.; Voznak, M. Exploiting Impact of Hardware Impairments in NOMA: Adaptive Transmission Mode in FD/HD and Application in Internet-of-Things. Sensors 2019, 19, 1293.

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