摘要
本文介绍了零相位滤波器的原理和实现方法。零相位滤波器在通带范围内可有效消除一般差分滤波器对信号产生的相位失真和频率改变。将零相位滤波应用到激光多普勒信号处理子系统,有助于抑制噪声,提高信噪比,可为正确选用滤波器处理激光多普勒信号提供参考。在Matlab平台下对实测数据进行对比,分析的结果也说明了这一点。
In this paper, the work principle and realizing method of Zero-Phase digital filter is introduced. Zero-Phase filter can effectively eliminate the phase distortion and frequency shift which caused by normal difference filter. Zero- Phase filter is applied to Laser Doppler signal processing subsystem. It can effectively restrain noise and enhance Signal Noise Ratio（SNR）. The characteristic provides a reference for filter＇s selection to Laser Doppler signal, and a contrast experiment on Matlab is introduced.
出处
《电子测量技术》
2009年第6期48-50,共3页
Electronic Measurement Technology
