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Cooperative Communications for 5G Wireless Systems
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- Author / Creator
- Jayamuni Mario Shashindra Srimal Silva
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The wireless industry plays a vital role in the economic development and prosperity of a country. Future wireless systems aim to achieve over 20 Gbps of data rates and less than 1 ms latencies for a large number services and applications. Thus, Fifth Generation (5G) wireless systems have been proposed to satisfy these demands. Massive multiple-input multiple-output (mMIMO), non-orthogonal multiple access (NOMA), and cognitive radio (CR) are some of the novel technologies envisioned for 5G systems. On the other hand, cooperative communications or the use of wireless relays have proven to improve the reliability and the energy efficiency of a wireless system. Thus, the primary objective of this thesis is to investigate the use of two-way relay networks (TWRNs), multi-way relay networks (MWRNs), and relay selection for wireless systems. First, the performance of multi-pair mMIMO TWRNs is analysed with channel imperfections. Second, relay selection in underlay CR mMIMO TWRNs is investigated. Third, a NOMA based MWRN scheme is proposed to significantly improve the sum rate. Finally, a machine learning based multiple relay selection scheme is proposed. This thesis demonstrates that the use of cooperative technologies significantly improves the data rate and energy efficiency of wireless systems.
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- Subjects / Keywords
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- Graduation date
- Fall 2020
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- Type of Item
- Thesis
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- Degree
- Doctor of Philosophy
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- License
- 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. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. 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.