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Paper Abstract and Keywords
Presentation 2010-03-01 11:30
Design and Analysis of Speed-Enhancing Circuit for Visible Light Communication
Yusuke Shimogaki, Yohtaro Umeda, Osamu Takyu (Tokyo Univ. of Science), Masao Nakagawa (Keio Univ.) CAS2009-94 SIP2009-139 CS2009-89
Abstract (in Japanese) (See Japanese page) 
(in English) Recently, Visible Light Communication that communicates by modulating light of illumination attracts much attention. It is useful to increase transmission speed for a single visible-light LED to aim at a higher bit rate, wider bandwidth, and the miniaturization of the hardware of this communication system. In this study, we propose an LED driving circuit that includes the speed-enhancing circuit. With the speed-enhancing circuit the LED driving current increases in the frequency range higher than the cutoff frequency of photo-response of the LED. As a result, the speed-enhancing circuit compensates the decrease of photo-response of the LED at a higher frequency than the cutoff frequency and increases the bandwidth of the LED emitting light. In addition, the design method of the speed-enhancing circuit is clarified and the impact of the speed-enhancing circuit on frequency dependence of the LED light intensity is demonstrated. The transmission bandwidth increases from 2.6 MHz to 4.4 MHz by applying the speed-enhancing circuit on white LED and to 7.1 MHz by applying both a blue filter and the speed-enhancing circuit.
Keyword (in Japanese) (See Japanese page) 
(in English) Visible Light Communication / LED / driver / speed-enhancing / transmission rate / / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 436, CS2009-89, pp. 93-98, March 2010.
Paper # CS2009-89 
Date of Issue 2010-02-22 (CAS, SIP, CS) 
ISSN Print edition: ISSN 0913-5685    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 CAS2009-94 SIP2009-139 CS2009-89

Conference Information
Committee SIP CAS CS  
Conference Date 2010-03-01 - 2010-03-02 
Place (in Japanese) (See Japanese page) 
Place (in English) Hotel Breeze Bay Marina, Miyakojima 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Signal processing for networking and communications, and others 
Paper Information
Registration To CS 
Conference Code 2010-03-SIP-CAS-CS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Design and Analysis of Speed-Enhancing Circuit for Visible Light Communication 
Sub Title (in English)  
Keyword(1) Visible Light Communication  
Keyword(2) LED  
Keyword(3) driver  
Keyword(4) speed-enhancing  
Keyword(5) transmission rate  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Yusuke Shimogaki  
1st Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
2nd Author's Name Yohtaro Umeda  
2nd Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
3rd Author's Name Osamu Takyu  
3rd Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
4th Author's Name Masao Nakagawa  
4th Author's Affiliation Keio University (Keio Univ.)
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Speaker Author-1 
Date Time 2010-03-01 11:30:00 
Presentation Time 20 minutes 
Registration for CS 
Paper # CAS2009-94, SIP2009-139, CS2009-89 
Volume (vol) vol.109 
Number (no) no.434(CAS), no.435(SIP), no.436(CS) 
Page pp.93-98 
#Pages 6 
Date of Issue 2010-02-22 (CAS, SIP, CS) 

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