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Presentation 2022-02-22 15:35
(%%% This presentation was CANCELLED) The Rationale for Stability-Constrained Design of Variable Recursive Filters
Tian-Bo Deng (Toho Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) Digital filters play an important role in a wide range of signal (media) processing areas, including speech processing, image processing, and digital communications. In particular, a variable digital filter can be regarded as a typical reconfigurable signal processing system that is able to perform online characteristic tuning. More specifically, a variable digital filter can update its coefficients in real time and regenerate a new frequency-domain characteristic in a fast manner as needed. However, stability-guarantee is a central and unavoidable issue in designing a variable recursive filter. This is because a variable recursive filter changes its coefficients on the fly during signal processing, which may cause instability. Basically, designing a variable recursive filter belongs to a nonlinear programming problem, and such a design formulation without stability constraints are most likely to produce a unstable recursive filter. Up to the present, the author has proposed an effective measure based on parameter-transformations to ensure the stability. This report aims to reconfirm the rationale for the stability-constrained design formulation through computer simulations. The computer simulations verify that it is most unlikely to get a stable recursive filter if the design is done without imposing any stability constraints. In other words, the computer simulations are highly consistent with the well-proved stability theories, and the stability-guarantee measures using parameter-transformations work effectively.
Keyword (in Japanese) (See Japanese page) 
(in English) variable filter / variable frequency-domain characteristic / recursive filter / stability / parameter transformation / / /  
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Conference Information
Committee AIT ME MMS IEICE-IE IEICE-ITS  
Conference Date 2022-02-21 - 2022-02-22 
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Place (in English) online 
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Paper Information
Registration To ME 
Conference Code 2022-02-AIT-ME-MMS-IE-ITS 
Language English (Japanese title is available) 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) The Rationale for Stability-Constrained Design of Variable Recursive Filters 
Sub Title (in English)  
Keyword(1) variable filter  
Keyword(2) variable frequency-domain characteristic  
Keyword(3) recursive filter  
Keyword(4) stability  
Keyword(5) parameter transformation  
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1st Author's Name Tian-Bo Deng  
1st Author's Affiliation Toho University (Toho Univ.)
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Speaker Author-1 
Date Time 2022-02-22 15:35:00 
Presentation Time 15 minutes 
Registration for ME 
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Volume (vol) vol.46 
Number (no) no.6 
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