盲自适应多用户检测器抗窄带干扰性能分析

An Analysis for Suppressing Narrow-band Interference Performances of a Blind Adaptive Multi-user Detector

CDMA系统的优点之一是可以和窄带系统共存。通过将窄带干扰信号等效为多个虚拟用户，就可以利用多用户检测算法实现窄带干扰抑制。由于接收端一般不知道窄带干扰的特征信息，因此只有采用盲多用户检测算法才能实现对多址干扰和窄带干扰的联合抑制。本文从理论上分析了最小均方误差（MinimumMeanSquareError，MMSE）盲多用户检测器抑制窄带干扰的性能，并给出了仿真实验结果。

The CDMA （Code Division Multiple Access） system has the merit of co-existing with the narrow-band communications system. Replacing the narrow-band interference with multi-virtual users, a new algorithm of multi-user detection is proposed to suppress narrow-band interference. As unknowing the characteristics of narrow-band interference, it is the blind multi-user detection algorithm that can suppress multiple access interference and narrow-band interference. This paper analyses the performances of MMSE of this algorithm and presents the simulation results.