NDLI: An improved method for designing variable recursive digital filters with guaranteed stability

Content Provider	IEEE Xplore Digital Library
Author	Tian-Bo Deng
Copyright Year	2000
Description	Author affiliation: Dept. of Inf. Sci., Toho Univ., Chiba, Japan (Tian-Bo Deng)
Abstract	Variable recursive digital filters require lower orders and less computational complexity to satisfy the same desired variable magnitude responses than nonrecursive filters, but the stability is difficult to guarantee since their coefficients are also varied in some manner. This paper proposes a new method for designing variable recursive one-dimensional (1-D) digital filters with guaranteed stability, which is an improved version of the existing one. The basic idea is to find both the numerator and the denominator coefficients of a variable recursive filter as multi-dimensional polynomials of the spectral parameters that define variable magnitude characteristics. To guarantee the stability, we first substitute the denominator coefficients by another set of variables which can take arbitrary values but without affecting the stability. Then both the numerator and the new denominator coefficients are determined as the polynomials of the spectral parameters. The new design method is simpler than the existing one, but does not degrade the final design accuracy.
Starting Page	678
Ending Page	681
File Size	380058
Page Count	4
File Format	PDF
ISBN	0780362535
DOI	10.1109/APCCAS.2000.913611
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-12-04
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Design methodology Digital filters Stability Finite impulse response filter Band pass filters Polynomials Frequency Degradation Transfer functions Information science
Content Type	Text
Resource Type	Article

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