A Low Complexity Algorithm for Multiple Relay Selection in Two-Way Relaying Cognitive Radio Networks
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.
A. Alsharoa et al., "A Low Complexity Algorithm for Multiple Relay Selection in Two-Way Relaying Cognitive Radio Networks," Proceedings of the 2013 IEEE International Conference on Communications Workshops (2013, Budapest, Hungary), pp. 327-331, Institute of Electrical and Electronics Engineers (IEEE), Jun 2013.
The definitive version is available at https://doi.org/10.1109/ICCW.2013.6649253
2013 IEEE International Conference on Communications Workshops, ICC 2013 (2013: Jun. 9-13, Budapest, Hungary)
Electrical and Computer Engineering
Keywords and Phrases
amplify and forward; Cooperative cognitive radio network; multiple relay selection; two-way relaying
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Article - Conference proceedings
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01 Jun 2013