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Adaptive periodic IIR filters
Journal article

Adaptive periodic IIR filters

J William Whikehart and Soura Dasgupta
ICASSP proceedings (1980), Vol.3, pp.2289-2292
01/01/1997

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Abstract

We consider adaptive periodic IIR filtering and present an extension of the Hyperstable Adaptive Recursive Filter (HARF). We give conditions for convergence of the parameter estimate error, involving passivity of certain operators in the identification loop, identifiability of the system parameters, and persistent excitation (pe). A necessary and sufficient condition for identifiability is given and subject to its satisfaction, input-only conditions guaranteeing pe are given.

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