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Paper Abstract and Keywords
Presentation 2022-07-07 16:15
The Rationale for Stability-Constrained Design of Variable Recursive Filters
Tian-Bo Deng (Toho Univ.) EA2022-20
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 theory, 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 / / /  
Reference Info. IEICE Tech. Rep., vol. 122, no. 95, EA2022-20, pp. 36-41, July 2022.
Paper # EA2022-20 
Date of Issue 2022-06-30 (EA) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF EA2022-20

Conference Information
Committee EA ASJ-H ASJ-MA ASJ-SP  
Conference Date 2022-07-07 - 2022-07-08 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
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Paper Information
Registration To EA 
Conference Code 2022-07-EA-H 
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 2022-07-07 16:15:00 
Presentation Time 25 minutes 
Registration for EA 
Paper # EA2022-20 
Volume (vol) vol.122 
Number (no) no.95 
Page pp.36-41 
#Pages 6 
Date of Issue 2022-06-30 (EA) 

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