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Paper Abstract and Keywords
Presentation 2025-03-03 11:20
[Poster Presentation] Validation of the Optimality and Usefulness of Tight Windows Designed via Manifold Optimization
Keito Takahashi, Daichi Kitahara (Keio Univ.) EA2024-113 SIP2024-148 SP2024-54
Abstract (in Japanese) (See Japanese page) 
(in English) The short-time Fourier transform (STFT) is widely used in signal analysis and processing. A special class of windows, called tight windows, make the STFT-domain signal processing robust to noise. In this study, we examine the global optimality and usefulness of the tight minimum-sidelobe (T-MS) windows, which were designed via manifold optimization but are not yet guaranteed to be globally optimal as solutions to nonconvex optimization problems. We derive a sufficient condition for the global optimality from an equivalent quadratically constrained quadratic program (QCQP). Specific T-MS windows satisfy the sufficient condition and have superior performance in separating signals of different amplitude and frequency.
Keyword (in Japanese) (See Japanese page) 
(in English) Short-Time Fourier Transform (STFT) / Tight Minimum-Sidelobe Window / Oblique Manifold / Global Optimality / / / /  
Reference Info. IEICE Tech. Rep., vol. 124, no. 390, SIP2024-148, pp. 227-232, March 2025.
Paper # SIP2024-148 
Date of Issue 2025-02-23 (EA, SIP, SP) 
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 EA2024-113 SIP2024-148 SP2024-54

Conference Information
Committee EA SIP SP IPSJ-SLP  
Conference Date 2025-03-02 - 2025-03-04 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To SIP 
Conference Code 2025-03-EA-SIP-SP-SLP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Validation of the Optimality and Usefulness of Tight Windows Designed via Manifold Optimization 
Sub Title (in English)  
Keyword(1) Short-Time Fourier Transform (STFT)  
Keyword(2) Tight Minimum-Sidelobe Window  
Keyword(3) Oblique Manifold  
Keyword(4) Global Optimality  
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Keyword(6)  
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Keyword(8)  
1st Author's Name Keito Takahashi  
1st Author's Affiliation Keio University (Keio Univ.)
2nd Author's Name Daichi Kitahara  
2nd Author's Affiliation Keio University (Keio Univ.)
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Speaker Author-1 
Date Time 2025-03-03 11:20:00 
Presentation Time 80 minutes 
Registration for SIP 
Paper # EA2024-113, SIP2024-148, SP2024-54 
Volume (vol) vol.124 
Number (no) no.389(EA), no.390(SIP), no.391(SP) 
Page pp.227-232 
#Pages 6 
Date of Issue 2025-02-23 (EA, SIP, SP) 

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