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多用户检测技术可以增加CDMA系统的用户容量。将天线阵列和空间滤波器运用于基站多用户检测之前的信号接收,并通过某一准则将不同方向上的用户分为互相关性很小以至可以忽略的不同相似组,进而忽略不同组的用户之间的多址干扰(MAI),在此基础上再对各组分别进行信息检测,将能大大减小多用户检测的计算量,提高信号处理速度。
Multi-user detection technology can increase the user capacity of the CDMA system. The antenna array and spatial filter are applied to the signal reception before the multi-user detection of the base station, and users in different directions are divided into different similar groups with little or even negligible cross-correlation by a certain criterion, thereby ignoring different groups of users (MAI). On the basis of this, the information detection of each group separately will greatly reduce the computational complexity of multi-user detection and improve the signal processing speed.