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Relay Selection for MIMO and Massive MIMO Two-Way Relay Networks Open Access


Other title
Spatial Multiplexing
Relay Networks
Type of item
Degree grantor
University of Alberta
Author or creator
Silva, Jayamuni Mario Shashindra S.
Supervisor and department
Tellambura, Chintha (ECE)
Ardakani, Masoud (ECE)
Examining committee member and department
Liang, Hao (ECE)
Tellambura, Chintha (ECE)
Ardakani, Masoud (ECE)
Jiang, Hai (ECE)
Department of Electrical and Computer Engineering
Date accepted
Graduation date
Master of Science
Degree level
Relay selection strategies help to improve spectral and energy efficiencies, to enhance transmission robustness, or to reduce latency in multi-relay cooperative wireless networks. Two novel relay selection strategies are proposed and analysed here for 1. Multiple-input multiple-output (MIMO) 2. Massive MIMO, amplify-and-forward (AF) two-way relay networks (TWRNs). Specifically, they are designed to minimize the overall outage probability or maximize the achievable sum rate. Interestingly, the first strategy amounts to maximizing the minimum of the eigenvalues of the Wishart matrices of the channels from the selected relay to the two user nodes. Counter-intuitively, the latter strategy amounts to maximizing the minimum of the determinant of the same Wishart matrices. The performance of these two strategies is investigated by deriving lower/upper bounds of the overall outage probability and the average sum rate approximations in closed-form. Further, the asymptotic high SNR approximations of the outage probability are derived, and thereby, the achievable diversity-multiplexing trade-off is quantified. Our analysis shows that the transmit power at user nodes can be scaled down proportional to their number of antennas and thus the use of a large scale antennas systems results in significant power savings. Further use of large number of antennas makes relay selection process simple and deterministic. Our results reveal that relay selection indeed significantly increases the sum rate and decreases the outage probability of wireless systems and will be useful for the wireless systems.
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
Citation for previous publication
S. Silva, G. Amarasuriya, C. Tellambura, and M. Ardakani, “Relay selection for MIMO Two-Way relay networks with spatial multiplexing,” in IEEE ICC 2015 - Workshop on Cooperative and Cognitive Networks (CoCoNet) (ICC’15 - Workshops 16), London, United Kingdom, Jun. 2015, pp. 943–948.

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File title: Title Page
File title: Relay Selection for MIMO and Massive MIMO Two-Way Relay Networks
File author: Jayamuni Mario Shashindra S. Silva
Page count: 98
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