Although the filtering method in frequency domain can solve the time variant filtering problem based on Fourier transform, the method may appear a false anomaly in conjunct part between Windows.
频率域滤波方法虽然可解决时变滤波问题，但这种方法是基于傅里叶变换，在窗口与窗口之间的接合部位会出现假异常。
The paper presents a method of motion curve frequency domain filtering in Omni-directional M-mode echocardiography images based on Discrete Fourier Transform (DFT).
介绍一种基于离散傅里叶变换(DFT)的全方向M型超声心动图运动曲线频域滤波技术。
Based on single magnetic dipole model, the spatial filtering method of cardiac magnetic signal in the frequency domain was investigated.
本文利用心脏磁场单磁偶极子模型研究了心脏磁场强度检测信号的频域空间滤波法。
In this paper, multilevel water gathering basins are separated and extracted automatically with filtering from geographic map based upon their differences in frequency domain.
利用多级汇水盆地在频率域(或波数域)中的频率差异，通过滤波方法逐级分离，并提取它们。
Digital filtering technique based on least square method multichannel sampling technique and frequency variation sampling technique were used experimentally.
实验应用了基于最小二乘法的数字滤波技术、多通道采样技术、变频率采样技术。
Digital filtering technique based on least square method, multichannel sampling technique and frequency variation sampling technique were used experimentally.
实验应用了基于最小二乘法的数字滤波技术、多通道采样技术、变频率采样技术。
The way, based on the principle of inverse filtering for recovering the ideal signals, can be realized both in time domain and in frequency domain.
基于恢复理想信号频谱的逆滤波原理，利用通道均衡法对接收通道的失配进行了校正。 通道均衡可在时域或频域实现。
A real time processing system based on a digital signal processor is described in this paper, and the signal frequency of vortex flowmeter is computed by means of an adaptive notch filtering method.
本文介绍了以数字信号处理器(dsp)为核心的实时处理系统，采用自适应陷波方法计算涡街流量计信号的频率。
A real time processing system based on a digital signal processor is described in this paper, and the signal frequency of vortex flowmeter is computed by means of an adaptive notch filtering method.
本文介绍了以数字信号处理器(dsp)为核心的实时处理系统，采用自适应陷波方法计算涡街流量计信号的频率。
应用推荐