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Paper Abstract and Keywords
Presentation 2021-08-23 14:00
[Invited Talk] Block-Sparse Estimation using Optimal Block Structure
Hiroki Kuroda (Ritsumeikan Univ.) SIP2021-29
Abstract (in Japanese) (See Japanese page) 
(in English) This talk presents a convex optimization based block-sparse estimation method which is effective even when concrete block partitions are not available. For the estimation of a block-sparse signal whose block partition is known a priori, extensive researches show the effectiveness of the mixed l2/l1 regularization. However, when the block partition used in the mixed l2/l1 regularization is different from that of the target signal, its estimation accuracy degrades significantly. To resolve this difficulty, the authors introduced a penalty function which takes the minimum of the mixed l2/l1 norm over all possible block partitions, and proposed its suitable convex relaxation. For the proposed regularization model, we developed an iterative algorithm which is guaranteed to converge to a globally optimal solution. In this talk, the authors' method
is described after a brief review on the existing literatures on block-sparse estimation problems.
Keyword (in Japanese) (See Japanese page) 
(in English) block-sparsity / unknown structure / regularization / convex optimization / proximal splitting algorithm / / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 144, SIP2021-29, pp. 11-11, Aug. 2021.
Paper # SIP2021-29 
Date of Issue 2021-08-16 (SIP) 
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 SIP2021-29

Conference Information
Committee SIP  
Conference Date 2021-08-23 - 2021-08-24 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To SIP 
Conference Code 2021-08-SIP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Block-Sparse Estimation using Optimal Block Structure 
Sub Title (in English)  
Keyword(1) block-sparsity  
Keyword(2) unknown structure  
Keyword(3) regularization  
Keyword(4) convex optimization  
Keyword(5) proximal splitting algorithm  
Keyword(6)  
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Keyword(8)  
1st Author's Name Hiroki Kuroda  
1st Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
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Speaker Author-1 
Date Time 2021-08-23 14:00:00 
Presentation Time 50 minutes 
Registration for SIP 
Paper # SIP2021-29 
Volume (vol) vol.121 
Number (no) no.144 
Page p.11 
#Pages 1 
Date of Issue 2021-08-16 (SIP) 

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