Mobile Fading Channels
A simple transmit diversity technique for wireless communications
IEEE Journal on Selected Areas in Communications
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This paper discusses an adaptive modulation technique combined with space-frequency block coded OFDM(SFBC OFDM) over frequency selective channels and evaluates the performance in terms of the outdated channel state information(CSI) in mobile environments. This paper employs the Alamouti’s diversity scheme in multiple input multiple output OFDM (MIMO OFDM) and an adaptive modulation with enhanced performance. Through the various simulations, the performance of SFBC OFDM employing adaptive modulation is compared with the performance of fixed modulation. Also, in adaptive modulation scheme, the effects of the outdated CSI under mobile environments are shown