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Node Switching Rate in Cooperative Communications Open Access


Other title
Cooperative Communication
Switching Rate
Opportunistic Relaying
Wireless Communication
Type of item
Degree grantor
University of Alberta
Author or creator
Xiao, Chuzhe
Supervisor and department
Beaulieu, Norman C. (Electrical and Computer Engineering)
Examining committee member and department
Nikolaidis, Ioanis (Computing Science)
Jiang, Hai (Electrical and Computer Engineering)
Department of Electrical and Computer Engineering
Date accepted
Graduation date
Master of Science
Degree level
In opportunistic relaying systems, only the relay with best channel condition among K relays is selected to take part in cooperation. This setup efficiently achieves diversity gain. However, the high switching rate of such systems may be undesirable due to practical implementation issues, for example, the corruption of the data signal by receiver switching transients, or channel estimation and synchronization failures due to excessive switching, as well as network control switching overheads which increase with increased switching. Recently, switch-and-examine relaying whose main advantage is its low switching rate, was proposed as a low complexity suboptimal alternative to opportunistic relaying. Meanwhile, comparisons of the switching rates of opportunistic and switch-and-examine schemes have been undertaken only for the case of Rayleigh fading. In this thesis, the switching rates of opportunistic relaying and switch-and-examine relaying systems with two or more relays operating under Rician and Nakagami-m fading are obtained in closed-form or single integral expressions. Results for independent and identically distributed fading links are obtained for the case of multiple relays and additionally for independent but not identically distributed fading links for the two relays case. The closed-form solutions explicitly depend on the Doppler frequency of the fading.
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.
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