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In this paper, the performance of a cooperative relaying scheme with cyclic delay diversity (CDD) for an orthogonal frequency division multiplexing (OFDM) system is investigated. The system under consideration consists of multiple single-antenna terminals acting as relays and cooperating to provide spatial diversity. Cyclic shift is introduced at each relay and thus increase the frequency selectivity...
Spatial diversity is a widely applied technique for enhancing the wireless system performance, since it greatly reduces the detrimental effects of multipath fading. Orthogonal space-time block codes are considered to be a good choice for spatial diversity, as they provide full diversity without any channel state information at the transmitter. The standard frequency domain application of these block...
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