A Procedure for Quasi-Equiripple Linear-Phase IIR Filters Design
Jacek Konopacki, Katarzyna Mościńska · International Journal of Electronics and Telecommunications · 2010
A Procedure for Quasi-Equiripple Linear-Phase IIR Filters Design The linear-phase IIR filters are described in many cases, mainly due to distortion-free transmission of signals. One of the major problems of IIR filter design is stability, which can be obtained with suitable value of group delay τ. This paper concerns calculation of filter orderNand group delay τ in case of quasi-equiripple design of IIR filters. We propose a novel procedure for determiningNand τ values; the procedure is valid for all types of filters with arbitrary number of zeros and a few non-zero poles. Evaluation of the proposed approach as well as examples illustrating its application are provided in the paper.