步长因子对最小均方误差自适应滤波效果影响的研究

Study on the Impact of Step Factor to LMS Adaptive Filtering Effect

自适应滤波器凭借其优越的性能,在微电子、自控、信号处理等诸多领域逐渐得到广泛应用。介绍了自适应滤波原理、自适应滤波算法,论述了步长因子对最小均方误差(LMS)自适应滤波效果的影响,借助MATLAB Simulink对被随机干扰的周期信号进行仿真研究,分析了步长因子对LMS算法收敛速度、滤波过程及输出信号稳态失调的影响。

Adaptive filter, by dint of its superior performance, has extensive use gradually in many fields including microelectronics, automatic control and signal processing. An introduction was givcd on the principle of adaptive filtering, adaplive filtering algorithm and a discusses was also gived on the impact of step factor to least mean square （LMS）adaptive fihering effect. With the help of MATLAB Simulink. a simulation study was performed for the periodic signals that were disturbed fihering process and homeostasis of the output signal.