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Outage Performance of Hybrid Decode–Amplify–Forward Protocol with the nth Best Relay Selection

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Abstract

In this paper, we consider the Hybrid Decode–Amplify–Forward protocol with the \(n\)th best-relay selection scheme. In the best-relay selection scheme, the best relay only forwards the source signal to the destination, regardless of working in the Amplify-and-Forward mode or the Decode-and-Forward mode. However, the best relay might be unavailable due to some reasons; hence we might bring into play the second, third or generally the \(n\)th best relay. We derive closed-form expression for the outage probability using the probability density function and moment generating function of the signal-to-noise ratio of the relayed signal at the destination node. Results show that with the \(n\)th best relay the diversity order is equal to \((m-n+2)\) where \(m\) is the number of relays. Simulation results are also given to verify the analytical results.

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Correspondence to Ali Olfat.

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Olfat, E., Olfat, A. Outage Performance of Hybrid Decode–Amplify–Forward Protocol with the nth Best Relay Selection. Wireless Pers Commun 78, 1403–1412 (2014). https://doi.org/10.1007/s11277-014-1824-x

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