A Low Complexity Algorithm for Multiple Relay Selection in Two-Way Relaying Cognitive Radio Networks

Abstract

In this paper, a multiple relay selection scheme for two-way relaying cognitive radio network is investigated. We consider a cooperative Cognitive Radio (CR) system with spectrum sharing scenario using Amplify-and-Forward (AF) protocol, where licensed users and unlicensed users operate on the same frequency band. The main objective is to maximize the sum rate of the unlicensed users allowed to share the spectrum with the licensed users by respecting a tolerated interference threshold. A practical low complexity heuristic approach is proposed to solve our formulated optimization problem. Selected numerical results show that the proposed algorithm reaches a performance close to the performance of the optimal multiple relay selection scheme either with discrete or continuous power distributions while providing a considerable saving in terms of computational complexity. In addition, these results show that our proposed scheme significantly outperforms the single relay selection scheme.

Meeting Name

2013 IEEE International Conference on Communications Workshops, ICC 2013 (2013: Jun. 9-13, Budapest, Hungary)

Department(s)

Electrical and Computer Engineering

Keywords and Phrases

amplify and forward; Cooperative cognitive radio network; multiple relay selection; two-way relaying

International Standard Book Number (ISBN)

978-146735753-1

International Standard Serial Number (ISSN)

2164-7038

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2013 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Jun 2013

Link to Full Text

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