Digital Group Delay Equalizer

Abstract

This paper deals with problem of digital group delay equalizer for various types of digital filters. Proposed method of equalization is evaluated for a set of digital allpass filters. Whole system is analyzed in Matlab environment. Genetic algorithm has been used to design group delay equalizer. In this paper, the method of genetic algorithm is applied to group delay correction of digital IIR bandstop filters. Three examples are presented to demonstrate efficiency of the proposed method. This genetic algorithm method is suitable also for basic types of digital filters with nonlinear phase frequency response.