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为改进智能天线系统中最小均方(LMS)算法收敛速度较慢的现状,提出了非零响应抽头检测频域归一化最小均方(FDNLMS)算法,利用空间滤波的优势,减少了发送数据对带宽的要求,提高了收敛速度.利用Matlab对多径、多用户的LMS算法和FDNLMS算法进行仿真,表明FDNLMS算法收敛速度比LMS算法提高了约28%.仿真结果表明:FDNLMS算法可以加快收敛速度,提高系统性能.
In order to improve the convergence speed of least mean square (LMS) algorithm in smart antenna system, the non-zero response taps detection frequency domain normalized least mean square (FDNLMS) algorithm is proposed. By using the advantage of spatial filtering, The requirement of bandwidth and the speed of convergence are improved.The simulation of multipath and multi-user LMS algorithm and FDNLMS algorithm using Matlab shows that the convergence speed of FDNLMS algorithm is about 28% higher than that of LMS algorithm.The simulation results show that FDNLMS algorithm can speed up convergence Speed, improve system performance.