Performance analysis of single relay selection in rayleigh fading

Authors:
D. Michalopoulos;G. Karagiannidis
Affiliations:
Dept. of Electr. & Comput. Eng., Aristotle Univ. of Thessaloniki, Thessaloniki;-
Venue:
IEEE Transactions on Wireless Communications
Year:
2008

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Abstract

We provide closed-form expressions for the outage and bit error probability (BEP) of uncoded, threshold-based opportunistic relaying (OR) and selection cooperation (SC), at arbitrary signal to noise ratios (SNRs) and number of available relays, assuming decode-and-forward relays and Rayleigh fading channels. Numerical results demonstrate that SC performs slightly better in terms of outage probability; in terms of BEP, both systems may outperform one another, depending on the SNR threshold that determines the set of relays that participate in the forwarding process.