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Super-orthogonal block codes in space-time domain (i.e., Super-Orthogonal Space-Time Trellis Codes (SOSTTCs)) were initially designed for Frequency Non-Selective (FNS) channels but in Frequency Selective (FS) channels these super-orthogonal block codes suffer performance degradation due to signal interference. To combat the effects of signal interference caused by the frequency selectivity of the fading channel, the authors employ two methods in this paper, namely, Multichannel Equalization (ME) and Orthogonal Frequency Division Multiplexing (OFDM). In spite of the increase complexity of the SOSTTC-ME optimum receiver design scheme, the SOSTTC-ME scheme maintains the same diversity advantage as compared to the SOSTTC scheme in FNS channel.
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