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Single and Dual Relay Selection in Two-Way Network-coded Relay Networks

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Abstract

In this paper, the relay selection problem for two-way relaying networks in single and dual relay selection schemes is addressed. In the single relay selection scheme, the problem is to find the best relay node which leads to the minimum bit error rate (BER) between the source nodes. We then derive the upper and lower bounds for the signal to noise ratio and the end-to-end BER of this scheme. In the dual relay selection scheme, the problem is to find the two best relay nodes. In this scheme, Alamouti space-time coding and physical layer network coding are utilized in order to achieve the higher performance. For improving the system performance, optimal power allocation between the sources and the relays is considered based on decreasing the BER. Finally, simulation results are provided to verify the correctness of analytical results.

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Correspondence to Nasrin Razmi.

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Razmi, N., Attari, M.A., Soleimani-Nasab, E. et al. Single and Dual Relay Selection in Two-Way Network-coded Relay Networks. Wireless Pers Commun 83, 99–115 (2015). https://doi.org/10.1007/s11277-015-2382-6

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