The use of model reduction techniques for designing IIR filters with linear phase in the passband

Author

Holford, Stephen ; Agathoklis, Pan

Author_Institution

Dept. of Electr. & Comput. Eng., Victoria Univ., BC, Canada

Volume

44

Issue

10

fYear

1996

fDate

10/1/1996 12:00:00 AM

Firstpage

2396

Lastpage

2404

Abstract

A technique to design IIR filters with linear phase in the passband is presented. This technique is based on model reduction of an FIR prototype using frequency weighting to improve the approximation in the transition region. Filters designed using the proposed technique are compared with linear-phase FIR designs and to IIR phase equalized designs with respect to computational complexity and group delay. It is shown that for highly selective filters, the proposed technique offers a good compromise

Keywords

FIR filters; IIR filters; band-pass filters; computational complexity; delay circuits; delays; filtering theory; reduced order systems; FIR prototype; IIR filters design; IIR phase equalized designs; computational complexity; frequency weighting; group delay; highly selective filters; linear phase; model reduction techniques; passband; transition region; Delay; Design methodology; Digital filters; Finite impulse response filter; Frequency; IIR filters; Optimization methods; Passband; Prototypes; Reduced order systems;

fLanguage

English

Journal_Title

Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1053-587X

Type

jour

DOI

10.1109/78.539025

Filename

539025