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On Modeling and Analysis of Optimum Diversity Combining in Cooperative Relay Networks Open Access


Other title
Cooperative Relay
Co-channel Interference
Optimum Combining
Type of item
Degree grantor
University of Alberta
Author or creator
Suraweera, Navod D
Supervisor and department
Tsui, Ying Y. (Electrical and Computer Engineering)
Examining committee member and department
Krzymien, Witold (Electrical and Computer Engineering)
Jiang Hai (Electrical and Computer Engineering)
Jing, Yindi (Electrical and Computer Engineering)
Hossain, Ekram (Electrical and Computer Engineering, University of Manitoba) - External examiner
Cockburn, Bruce (Electrical and Computer Engineering)
Tsui, Ying Y. (Electrical and Computer Engineering)
Khabbazian, Majid (Electrical and Computer Engineering) - Chair
Department of Electrical and Computer Engineering
Date accepted
Graduation date
Doctor of Philosophy
Degree level
The cancellation of co-channel interference (CCI) is extremely vital in the nextgeneration wireless systems, where universal frequency reuse is commonly used to maximize the capacity. The implementation of CCI cancellation at the receivers instead of the transmitters minimizes the additional overhead associated with CCI cancellation. Optimum combining (OC) enables the cancellation of CCI in multiple-antenna receivers. Cooperative relaying creates a virtual antenna array, which enables the cancellation of CCI using OC in single antenna receivers. The cancellation of CCI in cooperative relay networks using OC is the main focus of this thesis. More specifically, 1) the modeling and the application of optimum combining for cooperative relay networks 2) carrying out the performance analyses in different system and channel models to obtain performance metrics and 3) the evaluation of the robustness and the feasibility of practical implementation of OC in cooperative relaying, are carried out. The performance of OC in decode-and-forward and amplify-and-forward relay protocols, and in opportunistic relay selection is studied. The deterministic interference model, which can be used to model conventionally planned networks, and the random interference model, which can be applied for fourth-generation ad hoc and heterogeneous networks, are considered in the performance analysis. The impact of imperfect estimations of the desired and interferer channels on OC in cooperative relaying is analyzed. Optimum combining improves the performance of cooperative relay networks significantly with a minimum additional overhead, which allows the capacity to be maximized using universal frequency reuse at each transmitter.
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.
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