Exact Outage Probability Analysis for Selection Decode-and-Forward Cooperation Systems
In this paper, we present a selection decode-and- forward (S-DF) cooperation scheme where only the “best” relay, which is selected as the one who can decode correctly its received signal from source node and can achieve the highest instantaneous signal-to-noise ratio (SNR) at the destination, participates in relaying the source’s signal. We derive a novel exact closed-form expression of outage probability for the S-DF scheme over Rayleigh fading channels, based on which an asymptotic outage analysis is further presented in high SNR regime, showing that given M potential relays, M+1 diversity order is achieved by source node. Consequently, the proposed S-DF scheme with the best relay selection can achieve the full diversity at the expense of just two channels only regardless of the number of candidate relays.
Y. L. Zou and Y. D. Yao, "Exact Outage Probability Analysis for Selection Decode-and-Forward Cooperation Systems", Advanced Materials Research, Vols. 341-342, pp. 509-513, 2012