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Paper Abstract and Keywords
Presentation 2012-12-07 10:35
Intensity estimation of LED array for parallel visible light communication
Takanori Ito, Tomohiro Yendo (Nagaoka Univ of Tech), Shintaro Arai (KNCT), Takaya Yamazato, Hiraku Okada, Toshiaki Fujii (Nagoya Univ) CS2012-90 IE2012-104
Abstract (in Japanese) (See Japanese page) 
(in English) This paper focuses on a road-to-vehicle visible light communication (VLC) system using LED traffic light as the transmitter and camera as the receiver. The traffic light is composed of a hundred of LEDs on two dimensional plain. In this system, data is sent as two dimensional brightness patterns by controlling each LED of the traffic light individually, and they are received as images by the camera. Here, there are problems that neighboring LEDs on the received image are merged due to less number of pixels in case that the receiver is distant from the transmitter, and/or due to blurring by defocus of the camera. Because of that, bit error rate (BER) increases due to recognition error of intensity of LEDs. To solve the problem, we propose a method that estimates the intensity of LEDs by solving the inverse problem of communication channel characteristic from the transmitter to the receiver. The proposed method is evaluated by BER characteristics which are obtained by computer simulation and experiments. In the result, the proposed method can estimate with better accuracy than the conventional methods, especially in case that the received image is blurred a lot, and the number of pixels is small.
Keyword (in Japanese) (See Japanese page) 
(in English) LED / Visible Light Communication / Intelligent Transport System / / / / /  
Reference Info. IEICE Tech. Rep., vol. 112, no. 334, CS2012-90, pp. 113-118, Dec. 2012.
Paper # CS2012-90 
Date of Issue 2012-11-29 (CS, IE) 
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 CS2012-90 IE2012-104

Conference Information
Committee ITE-BCT IPSJ-AVM CS IE  
Conference Date 2012-12-06 - 2012-12-07 
Place (in Japanese) (See Japanese page) 
Place (in English) Fukuisi-chiiki-kouryu-plaza 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Image Coding, Streaming, etc. 
Paper Information
Registration To CS 
Conference Code 2012-12-BCT-AVM-CS-IE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Intensity estimation of LED array for parallel visible light communication 
Sub Title (in English)  
Keyword(1) LED  
Keyword(2) Visible Light Communication  
Keyword(3) Intelligent Transport System  
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1st Author's Name Takanori Ito  
1st Author's Affiliation Nagaoka University of Technology (Nagaoka Univ of Tech)
2nd Author's Name Tomohiro Yendo  
2nd Author's Affiliation Nagaoka University of Technology (Nagaoka Univ of Tech)
3rd Author's Name Shintaro Arai  
3rd Author's Affiliation Kagawa National College of Technology (KNCT)
4th Author's Name Takaya Yamazato  
4th Author's Affiliation Nagoya University (Nagoya Univ)
5th Author's Name Hiraku Okada  
5th Author's Affiliation Nagoya University (Nagoya Univ)
6th Author's Name Toshiaki Fujii  
6th Author's Affiliation Nagoya University (Nagoya Univ)
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Speaker Author-1 
Date Time 2012-12-07 10:35:00 
Presentation Time 20 minutes 
Registration for CS 
Paper # CS2012-90, IE2012-104 
Volume (vol) vol.112 
Number (no) no.334(CS), no.335(IE) 
Page pp.113-118 
#Pages 6 
Date of Issue 2012-11-29 (CS, IE) 

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