Design of predictive IIR filters via feedback extension of FIR forward predictors

Author

Ovaska, Seppo J. ; Vainio, Olli ; Laakso, Timo I.

Author_Institution

Inst. of Intelligent Power Electron., Helsinki Univ. of Technol., Espoo, Finland

Volume

46

Issue

5

fYear

1997

fDate

10/1/1997 12:00:00 AM

Firstpage

1196

Lastpage

1201

Abstract

Finite impulse response (FIR) predictors for polynomial signals and sinusoids are easy to design because of the available closed-form design formulae. On the other hand, those FIR predictors have two major drawbacks: the passband gain peak is usually greater than +3 dB, and a long FIR structure is needed to attain high attenuation in the stopband. Both of these characteristics cause severe problems, particularly in control instrumentation when the predictor operates inside a closed control loop. In this paper, we present a novel feedback extension scheme for FIR forward predictors. This extension makes it possible to easily design infinite impulse response (IIR) predictors with low passband ripple and high stopband attenuation. The new approach is illustrated with design examples

Keywords

IIR filters; approximation theory; circuit feedback; circuit optimisation; delays; digital filters; minimisation; network synthesis; polynomials; prediction theory; transient response; 3 dB; FIR forward predictors; FIR structure; closed control loop; control instrumentation; delay effects; digital filters; feedback extension; feedback extension scheme; finite impulse response; high stopband attenuation; low passband ripple; optimisation; passband gain peak; polynomial approximation; polynomial signals; predictive IIR filters; sinusoids; Attenuation; Feedback; Finite impulse response filter; IIR filters; Passband; Polynomials; Predictive models; Process design; Signal design; Signal processing;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.676741

Filename

676741