CDMA发射分集系统的多用户检测常模算法分析

空时分集技术的最大优点在于在不增加带宽的情况下可以提高系统的可靠性,是目前移动通信的研究热点.常模算法是一种性能优良的码分多址(CDMA)盲多用户检测技术,能确保判决信号与实际传送信号之间的差错较小,误码率性能良好.文中提出将标准线性受限常模算法(LCCMA)与空时分组码(STBC)相结合,设计出一种收敛快、能够改善系统性能的基于2-空时分组码的多用户接收机.

SLCCMA Performance in CDMA Transmission Diversity System

The biggest advantage of STD(space time diversity) is that it improves the performance of system without increasing the band-width. Now, STD is the focus of attention in wireless telecommunication, and plenty of works have been done on it. Constant mode algorithm (CMA) is an efficient blind adaptive multi-user detection (MUD) algorithm for CDMA systems. It can decrease the BER (bit error rate) of system largely. In this paper, we devise a novel and better performance receiver, which combines standard LC-CMA(linearity confine CMA) blind adaptive multi-user detection with STBC(space time block coding) technique.