DESIGN OF IIR EIGENFILTERS IN THE FREQUENCY-DOMAIN

The eigenfilter approach is an appealing way of designing digital filt ers, mainly because of the simplicity of its implementation. In this c orrespondence, a new method of applying the eigenfilter approach to th e design of infinite impulse response (IIR) filters is described. The procedure works in the frequency domain and yields the coefficients of a causal rational transfer function having an arbitrary number of pol es and zeros. Some examples of filter design are gi,en to show the eff ectiveness of the method presented.