Title :
A New Method for Designing Causal Stable IIR Variable Fractional Delay Digital Filters
Author :
Tsui, K.M. ; Chan, S.C. ; Kwan, H.K.
Author_Institution :
Univ. of Hong Kong, Pokfulam
Abstract :
This paper studies the design of causal stable Farrow-based infinite-impulse response (IIR) variable fractional delay digital filters (VFDDFs), whose subfilters have a common denominator. This structure has the advantages of reduced implementation complexity and avoiding undesirable transient response when tuning the spectral parameter in the Farrow structure. The design of such IIR VFDDFs is based on a new model reduction technique which is able to incorporate prescribed flatness and peak error constraints to the IIR VFDDF under the second order cone programming framework. Design example is given to demonstrate the effectiveness of the proposed approach.
Keywords :
IIR filters; delay filters; reduced order systems; transient response; causal stable Farrow-based infinite-impulse response filters; model reduction; transient response; variable fractional delay digital filters; Constrained model reduction; delay filter; infinite-impulse response (IIR); variable digital filter (VDF);
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2007.903784