The system capacity and performance of MC-CDMA communication systems can be significantly enhanced by jointly employing MAP-based multiuser detection(MUD) and channel decoding techniques.In this paper

a Turbo space-time MUD based on the combinations of smart antennas and iterative MAP-based MUD is presented.The proposed method is featured as a novel technique for further improving the system capacity and performance.It is shown that the proposed Turbo space-time MUD algorithm can significantly reduce the computational complexity compared with the conventional optimal MAP-based MUD schemes.Furthermore

it is demonstrated that the performance of the proposed algorithm can approach that of a single user coded MC-CDMA system with an antenna array in both AWGN and frequency selective fading channels.