一种新的窄带信号去噪方法仿真分析

采用基于线性组合器的一种谱线增强算法，对窄带振动信号进行消噪处理。针对传统自适应谱线增强算法的不足，本文提出一种输出反馈的LMS算法，将滤波器输出的历史信息与线性组合器的输出加权后迭加，构成新的滤波器输出，从而构成新的滤波算法。利用MATLAB仿真了该新型组合滤波器消噪效果,仿真分析中将该消噪方案用于仿真信号实际采集的信号。通过仿真验证，新算法的去噪性能优于原来算法。

Simulation analysis of a new denoising Algorithm for narrow-band signal

A spectral-line enhancement algorithm based on a linear combiner was used to denoise narrow vibration signals.Aiming at the disadvantage of the traditional adaptive spectral-line enhancement algorithm,a new LMS algorithm with output feedback was proposed here,it superposed the historic information exported by a filter and the output exported by a linear combiner to form the new output.So a new algorithm was set up.The effect of the new combined filter was simulated with Matlab softwave.The simulated signal and the actual one were used in a simulation analysis.The results showed that the new algorithm is better than the original one in time domain and its denoising performance is verified.