编码的多载波CDMA系统中Turbo时空多用户检测

联合MAP多用户检测和信道译码的迭代多用户检测技术可显著提高多载波CDMA系统的容量和性能,本文给出了结合智能天线和迭代MAP多用户检测的Turbo时空多用户检测算法,该方法进一步提高了系统的性能.Turbo时空多用户检测算法不仅极大减小了传统最优MAP多用户检测算法的运算量,而且,此算法性能在AWGN和频率选择性衰落信道中都能逼近单用户编码多载波CDMA系统多天线接收的性能.

Turbo Space-time Multiuser Detection for Coded Multi-Carrier CDMA Systems

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.