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A Method of Designing IIR Digital Filters with Maximal Flatness in Passband and Prescribed Steepness in Transition Band
Yoshiro SUHARA Tosiro KOGA
IEICE TRANSACTIONS (1976-1990)
Publication Date: 1990/11/25
Print ISSN: 0000-0000
Type of Manuscript: Special Section LETTER (Special Issue on 1990 Autumn Natl. Conv. IEICE)
Category: Signals, Circuits and Images
Full Text: PDF>>
This letter presents, as an extension of a previous work of the present authors, a design method of IIR digital filters, which is guaranteed in principle to be stable, by using the interpolation of the characteristic function of the filter for a set of prescribed values of the function and, in addition, its higher derivatives. As a numerical example, an IIR digital filter having the characteristics such that it has a maximal flatness in the passband and prescribed steepness in the transition band is designed to show the effectiveness of the proposed method.