DESIGN OF PREDICTIVE IIR FILTERS VIA FEEDBACK EXTENSION OF FIR FORWARD PREDICTORS

Citation
Sj. Ovaska et al., DESIGN OF PREDICTIVE IIR FILTERS VIA FEEDBACK EXTENSION OF FIR FORWARD PREDICTORS, IEEE transactions on instrumentation and measurement, 46(5), 1997, pp. 1196-1201
Citations number
14
Categorie Soggetti
Engineering, Eletrical & Electronic","Instument & Instrumentation
ISSN journal
00189456
Volume
46
Issue
5
Year of publication
1997
Pages
1196 - 1201
Database
ISI
SICI code
0018-9456(1997)46:5<1196:DOPIFV>2.0.ZU;2-N
Abstract
Finite impulse response (FIR) predictors for polynomial signals and si nusoids are easy to design because of the available closed-form design formulae, On the other hand, those FIR predictors have two major draw backs: the passband gain peak is usually greater than +3 dB, and a lon g FIR structure is needed to attain high attenuation in the stopband, Both of these characteristics cause severe problems, particularly in c ontrol instrumentation when the predictor operates inside a closed con trol loop, In this paper, we present a novel feedback extension scheme for FIR forward predictors. This extension makes it possible to easil y design infinite impulse response (IIR) predictors with low passband ripple and high stopband attenuation, The new approach is illustrated with design examples.