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Article

Switchable Coupled Relays Aid Massive Non-Orthogonal Multiple Access Networks with Transmit Antenna Selection and Energy Harvesting

by 1,2,*,† and 1,†
1
Faculty of Electrical Engineering and Computer Science, VSB-Technical University of Ostrava, 17. Listopadu 2172/15, 708 00 Ostrava, Czech Republic
2
Faculty of Electronics and Communications, Sai Gon University, 273 An Duong Vuong, Hochiminh 700 00, Vietnam
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Gianmarco Romano
Sensors 2021, 21(4), 1101; https://doi.org/10.3390/s21041101
Received: 14 December 2020 / Revised: 29 January 2021 / Accepted: 1 February 2021 / Published: 5 February 2021
(This article belongs to the Special Issue Massive MIMO and mm-Wave Communications)
The article proposes a new switchable coupled relay model for massive MIMO-NOMA networks. The model equips a much greater number of antennas on the coupled relays to dramatically improve capacity and Energy Efficiency (EE). Each relay in a coupled relay is selected and delivered into a single transmission block to serve multiple devices. This paper also plots a new diagram of two transmission blocks which illustrates energy harvesting and signal processing. To optimize the system performance of a massive MIMO-NOMA network, i.e., Outage Probability (OP) and system throughput, this paper deploys a Transmit Antenna Selection (TAS) protocol to select the best received signals from the pre-coding channel matrices. In addition, to achieve better EE, Simultaneously Wireless Information Power Transmit (SWIPT) is implemented. Specifically, this paper derives the novel theoretical analysis in closed-form expressions, i.e., OP, system throughput and EE from a massive MIMO-NOMA network aided by switchable coupled relays. The theoretical results obtained from the closed-form expressions show that a massive MIMO-NOMA network achieves better OP and greater capacity and expends less energy than the MIMO technique. Finally, independent Monte Carlo simulations verified the theoretical results. View Full-Text
Keywords: non-orthogonal multiple access; multiple devices; multiple antennas; massive MIMO; transmit antenna selection; energy harvesting non-orthogonal multiple access; multiple devices; multiple antennas; massive MIMO; transmit antenna selection; energy harvesting
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MDPI and ACS Style

Tran, T.-N.; Voznak, M. Switchable Coupled Relays Aid Massive Non-Orthogonal Multiple Access Networks with Transmit Antenna Selection and Energy Harvesting. Sensors 2021, 21, 1101. https://doi.org/10.3390/s21041101

AMA Style

Tran T-N, Voznak M. Switchable Coupled Relays Aid Massive Non-Orthogonal Multiple Access Networks with Transmit Antenna Selection and Energy Harvesting. Sensors. 2021; 21(4):1101. https://doi.org/10.3390/s21041101

Chicago/Turabian Style

Tran, Thanh-Nam, and Miroslav Voznak. 2021. "Switchable Coupled Relays Aid Massive Non-Orthogonal Multiple Access Networks with Transmit Antenna Selection and Energy Harvesting" Sensors 21, no. 4: 1101. https://doi.org/10.3390/s21041101

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