Heidarpour, M. R.Uysal, Murat2015-02-012015-02-0120111058-6393https://doi.org/10.1109/ACSSC.2011.6190188http://hdl.handle.net/10679/877Due to copyright restrictions, the access to the full text of this article is only available via subscription.In this paper, we consider a cooperative multi-carrier multi-relay system over frequency-selective fading channels. Specifically, we adopt the orthogonal frequency division multiplexing (OFDM) with bit-interleaved coded-modulation (BICM) as the physical layer signalling platform. Under the assumption of amplify-and-forward relaying, we first present a diversity order analysis through the derivation of pairwise error probability (PEP) for an orthogonal scheme in which relays scale and transmit their received OFDM signals in non-overlapping time slots. Based on the derived PEP expression, we further propose a relay selection rule to improve the spectral efficiency. We also investigate some suboptimal (heuristic) selection methods as low-complexity alternatives. We present extensive Mont Carlo simulations to confirm the analytical derivations and provide performance comparisons among competing schemes.enginfo:eu-repo/semantics/restrictedAccessConference paper1121112510.1109/ACSSC.2011.6190188Cooperative diversityOrthogonal frequency division multiplexingRelay selection2-s2.0-84861310321