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Paper Abstract and Keywords
Presentation 2024-08-27 15:50
Approximate Soft-Thresholding Function using V-I Characteristics of PN-junction Diode for Analog Compressed Sensing
Soma Furusawa (Kyoto Univ.), Taisei Kato (Osaka Univ.), Ryo Hayakawa (Tokyo Univ. of Agriculture and Tech.), Kazunori Hayashi (Kyoto Univ.) SIP2024-63
Abstract (in Japanese) (See Japanese page) 
(in English) To realize analog compressed sensing, we consider the implementation of the proximal operator of the $ ell_1$-norm called soft thresholding function, which frequently appears in convex optimization algorithms based on proximal splitting for the $ell_1-ell_2$ optimization problem, and we propose to approximate the function using the voltage-current (V-I) characteristics of a PN-junction diode. To demonstrate the effectiveness of the proposed method, we apply the proposed approximate soft thresholding function using diodes to the iterative shrinkage thresholding algorithm (ISTA) and the fast ISTA (FISTA). Numerical experiments of the sparse signal reconstruction confirm that diode-ISTA and diode-FISTA can achieve comparable convergence performance to that of conventional ISTA and FISTA, respectively. Moreover, it is also confirmed that diode-ISTA and diode-FISTA can achieve a smaller steady-state mean squared error (MSE) compared to conventional ISTA and FISTA.
Keyword (in Japanese) (See Japanese page) 
(in English) soft-thresholding function / PN-junction diode / $ell_1-ell_2$ sparse reconstruction / analog compressed sensing / / / /  
Reference Info. IEICE Tech. Rep., vol. 124, no. 162, SIP2024-63, pp. 89-94, Aug. 2024.
Paper # SIP2024-63 
Date of Issue 2024-08-19 (SIP) 
ISSN Online edition: ISSN 2432-6380
Copyright
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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)
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Conference Information
Committee SIP  
Conference Date 2024-08-26 - 2024-08-27 
Place (in Japanese) (See Japanese page) 
Place (in English) University of Fukui (Bunkyo Campus) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Signal processing, etc. 
Paper Information
Registration To SIP 
Conference Code 2024-08-SIP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Approximate Soft-Thresholding Function using V-I Characteristics of PN-junction Diode for Analog Compressed Sensing 
Sub Title (in English)  
Keyword(1) soft-thresholding function  
Keyword(2) PN-junction diode  
Keyword(3) $ell_1-ell_2$ sparse reconstruction  
Keyword(4) analog compressed sensing  
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1st Author's Name Soma Furusawa  
1st Author's Affiliation Kyoto University (Kyoto Univ.)
2nd Author's Name Taisei Kato  
2nd Author's Affiliation Osaka University (Osaka Univ.)
3rd Author's Name Ryo Hayakawa  
3rd Author's Affiliation Tokyo University of Agriculture and Technology (Tokyo Univ. of Agriculture and Tech.)
4th Author's Name Kazunori Hayashi  
4th Author's Affiliation Kyoto University (Kyoto Univ.)
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Speaker Author-1 
Date Time 2024-08-27 15:50:00 
Presentation Time 20 minutes 
Registration for SIP 
Paper # SIP2024-63 
Volume (vol) vol.124 
Number (no) no.162 
Page pp.89-94 
#Pages 6 
Date of Issue 2024-08-19 (SIP) 

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