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Underwater acoustic communication systems use a bandwidth that is comparable to the center frequency of the signal and qualify as broadband in a relative sense. And underwater acoustic channels are time-varying and multipath channels, giving rise to serious inter-symbol interference (ISI), inter-carrier interference (ICI) and time-domain telescopic changes in the underwater acoustic OFDM system. In...
In this paper, we propose a systematic design of full-diversity space-frequency (SF) codes for multiuser MIMO-OFDM systems. With joint maximum likelihood detection, the proposed codes can obtain full diversity over selective-fading multiple access channels. The proposed coding scheme does not require the cooperation of multiple transmitters, nor the instantaneous channel side information at the transmitters...
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