线性无偏最小方差多用户信号检测器

Linear Unbiased Minimum Variance (LUMV) Multiuser Detector

码分多址（ＣＤＭＡ）移动通信系统的主要缺点是存在远近效应和多址干扰，它们影响了通信系统的稳定性、容量及应用范围。本文导出一种具有线性结构的ＣＤＭＡ检测器──线性无偏最小方差多用户信号检测器，并给出一种运算量较小的递推实现算法，最后对几种实际情况进行了讨论，计算机仿真结果表明该检测器具有良好的性能。

The main shortcomings of direct sequence code division multiple access (DS-CD-MA) communication systems are the Near-Far effect and multiple access interferences, which impair the stability, capacity and application areas of the communica tion systems. This paper presents a new kind of linear structured CDMA detector──Linear Unbiased Minimum Variance (LUMV) multiuser detector. A recursive iteration algorithm is given and some practical issues are considered. Computer simulations show that this detector has good performances.