频域反卷积滤波器的因果性的研究

The Research of Causality for Frequency Domain Deconvolution Filter

本文首先介绍了成功应用于现代时域测量中的几种频域反卷积滤波器 .并说明了这些反卷积滤波器元旦是非因果的 .显然 ,滤波器非因果化要影响反卷积的估值 ,因此 ,对反卷积滤波器进行因果化是很必要的 .进而 ,介绍了将这些反卷积滤波器因果化原理和方法 ,并给出了因果化的流程图 .最后 ,对常用的反卷积滤波器的因果化进行了仿真研究 ,分别给出了这些反卷积滤波器困晨化前后的滤波效果 .仿真结果表明 。

A number of frequency domain deconvolution filters,which are applied successfully in modern tine domain measurement are introduced in this paper at first,and we illustrate that these deconvolution filters are noncausal totally.Obviously,the non causal character of the filters will effect the estimation of deconvolution,so it is necessary to make the filters causality.And then,the theory and method to make these deconvolution filters causal are given,we get the flow charts also.Finally,the performance of general non causal and causal deconvolution filters is investigated by computer simulation.The filtering results of them show that causal filter can refine deconvoltuion estimation.