Approximation of IIR filters with equivalent fir filters in magnitude and group delay responses

被引：2

作者：

Rizvandi, Nikzad Bobaii ^{[1
]}

Ranjbar, Mohammad R. Nezami ^{[1
]}

nejad, Mahmood Mousavi ^{[1
]}

机构：

[1] Iran Telecommun Res Ctr ITRC, Multimedia Grp, Dept Informat Technol, Tehran 14399, Iran

来源：

PROCEEDINGS OF THE 2007 15TH INTERNATIONAL CONFERENCE ON DIGITAL SIGNAL PROCESSING | 2007年

关键词：

replacement IIR filters with FIR filters; mean least square error approximation; magnitude and group delay;

D O I：

10.1109/ICDSP.2007.4288575

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

This paper presents a new method to approximate art IIR filter with a FIR filter so that the obtained FIR filter has the same Magnitude and group delay as the original IIR filter. This method is formulate as minimization of an error transfer function between the given IIR filter and the desired FIR filter which is designed using the mean least square error(MLSE) technique. Analyzing of this method shows that this method converges to an accurate approximation when places of the IIR filter poles in Z-plane are in an elliptic with radiuses equal to 0.4 and 0.14 in imaginary and real axis, respectively. Several examples are presented in order to show this method efficiency.

引用

页码：288 / +

页数：3

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