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Transmit diversity has been recently introduced to reduce the detrimental effects in fading channels. Transmit diversity techniques combined with error control coding have been explored in a new scheme called space-time coding. We apply space-time block codes to multicarrier CDMA systems. The performance of the space-time coded multicarrier CDMA system is demonstrated over time-frequency selective (double selective) fading channel through simulations. Simulation results show that the MC-CDMA systems with transmit diversity perform much better than the MC-CDMA systems without transmit diversity over double selective fading channels.
Date of Conference: 2002