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| Presentation | 2022-06-17 14:55 Transformation Functions for Stability-Guaranteed Variable Recursive Filters Tian-Bo Deng (Toho Univ.)  RCS2022-65 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Digital filtering is one of the most fundamental signal processing techniques, and it plays a crucial role in a broad range of signal-processing-related applications, including digital communications. Since some applications require a digital filter to change its frequency response in a real-time manner during filtering operations, a digital filter must have variable frequency response. Such digital filters are well known as variable digital filters, which have variable coefficients. To get a new frequency response, one simply needs to change the coefficients of the variable digital filter being used. However, changing the coefficients is most likely to make the filter become unstable. To tackle this stability problem, the author has proposed an effective way that is based on coefficient transformations. Through performing coefficient transformations on the denominator coefficients of the transfer function of a recursive-type variable digital filter, this method can guarantee that the stability condition is always satisfied. That is, this transformation-based tactic can always guarantee the stability during online tuning. To carry out the coefficient transformations, a function meeting a special condition is required. As long as this condition is met, this tactic results in a definitely stable recursive-type variable digital filter, and no stability issue needs to be concerned. In this paper, a variety of such transformation functions are developed and detailed. As those transformation functions meet the special requirement, one can employ any one of them in filter designs and obtain a definitely stable recursive-type variable digital filter. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | variable digital filter / variable frequency response / recursive-type digital filter / stability / transformation function / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 122, no. 73, RCS2022-65, pp. 242-246, June 2022. | |
| Paper # | RCS2022-65 | |
| Date of Issue | 2022-06-08 (RCS) | |
| 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 | RCS2022-65 |
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| Conference Information | |
| Committee | RCS |
| Conference Date | 2022-06-15 - 2022-06-17 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | University of the Ryukyus, Senbaru Campus and online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | First Presentation in IEICE Technical Committee, Resource Control, Scheduling, Wireless Communications, etc. |
| Paper Information | |
| Registration To | RCS |
| Conference Code | 2022-06-RCS |
| Language | English (Japanese title is available) |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Transformation Functions for Stability-Guaranteed Variable Recursive Filters |
| Sub Title (in English) | |
| Keyword(1) | variable digital filter |
| Keyword(2) | variable frequency response |
| Keyword(3) | recursive-type digital filter |
| Keyword(4) | stability |
| Keyword(5) | transformation function |
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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 | 2022-06-17 14:55:00 |
| Presentation Time | 25 minutes |
| Registration for | RCS |
| Paper # | RCS2022-65 |
| Volume (vol) | vol.122 |
| Number (no) | no.73 |
| Page | pp.242-246 |
| #Pages | 5 |
| Date of Issue | 2022-06-08 (RCS) |
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