本文介绍零相移滤波器的工作原理及实现方法。
This paper introduce the principle and design of an zero-phase filter.
文中用逼近法和双线性变换法，设计了用于圆度测量的高斯数字逼近滤波器，并给出了零相移的递归滤波算法，计算量小，计算效率高，易于实现。
A series of Gaussian digital approximation filters used in roundness measurement were designed on the basis of approximation method and bilinear transformation.
根据实际数据处理工作的需要，以减小信号相移量为目标，提出一种新的数字滤波算法，即所谓往复数字滤波器。
A new algorithm for digital filtration, namely Forth Back digital Filter, is put forward for the need of actual data processing and reduction of the phase shift.
提出了基于载波组合相移技术的电流型电力有源滤波器，在较低的开关频率下实现了等效的高频载波效果。
With this technique, the effect of equivalent high switching frequency converter has been obtained with low switching frequency converter.
这种方法克服了以往采用固定频率滤波器带来的相移和频率漂移问题，而且结构简单。
This approach the problem of conquers phase excursion and frequency drift that anciently adopts fixed frequency filter and its frame is simple.
而滤波器的零点、极点个数及其位置又完全决定了其相移和群延迟的性质。
The characters of phase shift and group delay are controlled by the number and position of zeroes and poles.
分析表明：可以通过改变光栅的相移点数、选择不同的变迹函数，研制用于WDM和DWDM的滤波器。
The results show that a series of band pass filter applied in WDM and DWDM were made by the change of inserted phase-number and apodising functions.
相移光纤光栅作为一种透射型滤波器，在光通信和传感领域有着广泛的应用。
As a transmission type filter, phase-shifted fiber Bragg grating can be widely applied in the fields of optical communications and sensing.
相移级联光栅可用作带宽滤波器，通过增加相移光栅的级联数增加带宽。
The multi-phase-shifts fiber grating with cascade phase-shifts can be used as bandwidth filter and its bandwidth can be widened by increasing cascade numbers.
该方法将控制器的设计转化为零相移低通数字滤波器的设计问题，借助于数字信号处理的理论和工具直接得到所需的控制器参数。
A repetitive controller can be obtained by designing a zero phase shift low pass filter. With the help of digital signal processing and software tools, it is easy to design a satisfactory controller.
对陷波滤波器进行了改进，使得引入控制系统通频带的附加相移减小，降低了对系统控制性能的影响。
The modification of the notch filter made the extra phase-shifting introduced to the control system passband reduced and so the control performance was improved.
针对通常情况下滤波器引起的相移问题 ，概述零相位滤波的重要意义。
Aiming at the problem of phase error caused by normal filters in signal processing , summarizes the important meaning of digital filtering with zero phase error.
该采样方法使用滤波器的多相结构实现，这种实现方法特别适合于线性相移fir滤波器。
The implementation of the Sampling method is accomplished by the polyphase structure of the filter. This implementation is particularly suitable for linear phase FIR filter.
该采样方法使用滤波器的多相结构实现，这种实现方法特别适合于线性相移fir滤波器。
The implementation of the Sampling method is accomplished by the polyphase structure of the filter. This implementation is particularly suitable for linear phase FIR filter.
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