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Explicit Formula for Predictive FIR Filters and Differentiators Using Hahn Orthogonal Polynomials

Saed SAMADI, Akinori NISHIHARA

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Summary :

An explicit expression for the impulse response coefficients of the predictive FIR digital filters is derived. The formula specifies a four-parameter family of smoothing FIR digital filters containing the Savitsky-Goaly filters, the Heinonen-Neuvo polynomial predictors, and the smoothing differentiators of arbitrary integer orders. The Hahn polynomials, which are orthogonal with respect to a discrete variable, are the main tool employed in the derivation of the formula. A recursive formula for the computation of the transfer function of the filters, which is the z-transform of a terminated sequence of polynomial ordinates, is also introduced. The formula can be used to design structures with low computational complexity for filters of any order.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E90-A No.8 pp.1511-1518
Publication Date
2007/08/01
Publicized
Online ISSN
1745-1337
DOI
10.1093/ietfec/e90-a.8.1511
Type of Manuscript
Special Section PAPER (Special Section on Papers Selected from the 21st Symposium on Signal Processing)
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