Fareed, M. M.Uysal, MuratTsiftsis, T. A.2014-12-232014-12-232014-060018-9545http://hdl.handle.net/10679/781https://doi.org/10.1109/TVT.2013.2290780Due to copyright restrictions, the access to the full text of this article is only available via subscription.In this paper, we investigate the performance of a cooperative orthogonal frequency-division multiple-access (OFDMA) system with decode-and-forward (DaF) relaying. Specifically, we derive a closed-form approximate symbol-error-rate expression and analyze the achievable diversity orders. Depending on the relay location, a diversity order up to (L-SkD + 1) + Sigma(M)(m=1) min(L-SkRm + 1, L-RmD + 1) is available, where M is the number of relays, and L-SkD + 1, L-SkRm + 1, and L-RmD + 1 are the lengths of channel impulse responses of source-to-destination, source-to-mth relay, and mth relay-to-destination links, respectively. Monte Carlo simulation results are also presented to confirm the analytical findings.enginfo:eu-repo/semantics/restrictedAccessArticle6352216222300033791130002110.1109/TVT.2013.2290780Error rateOrthogonal frequency division multiple accessPower allocationRelay channels2-s2.0-84902990943