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| Presentation | 2022-03-11 16:00 A Study on Symbol Synchronization for Image Sensor Communication Using Propeller-type Rotary LED Transmitter Akinori Nakayama, Shintaro Arai (Okayama Univ. of Sci.)  IT2021-136 ISEC2021-101 WBS2021-104 RCC2021-111 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | In this paper, we focus on a propeller-type rotary LED transmitter and image-sensor-based visible light communication (i.e., image sensor communication: ISC) using this transmitter. The propeller-type rotary LED transmitter, which is currently under development by us, generates multiple afterimages of light by rotating while blinking the LED light that is the transmitting signal. We use their multiple afterimages to improve the communication speed of ISC. In ISC using this transmitter, we found that a time gap between the symbol start timing of the transmitter and the shutter timing of the camera causes inter-symbol interference, which leads to errors in the demodulated data. To solve this problem, this study proposes a symbol synchronization method for image sensor communication using the propeller-type rotary LED transmitter. Specifically, the transmitter sends a known LED blinking pattern as a header of data. The receiver uses image processing techniques to detect the coordinates of afterimages of the LED lights from the received header pattern. In addition, we detect the symbol synchronization misalignment based on the detected coordinates for the data demodulation. The simulation results show that the proposed method accurately detected both the coordinates of the afterimage and the synchronization error in the range up to 2.5 m communication distance when the LED blinking angles were at 1-degree intervals. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | visible light communication (VLC) / image sensor communication (ISC) / rotary LED transmitter / symbol synchronization misalignment / symbol synchronization method / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 121, no. 430, WBS2021-104, pp. 307-312, March 2022. | |
| Paper # | WBS2021-104 | |
| Date of Issue | 2022-03-03 (IT, ISEC, WBS, RCC) | |
| 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 | IT2021-136 ISEC2021-101 WBS2021-104 RCC2021-111 |
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| Conference Information | |
| Committee | IT ISEC RCC WBS |
| Conference Date | 2022-03-10 - 2022-03-11 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Joint Meeting of ISEC, IT, RCC, and WBS |
| Paper Information | |
| Registration To | WBS |
| Conference Code | 2022-03-IT-ISEC-RCC-WBS |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Study on Symbol Synchronization for Image Sensor Communication Using Propeller-type Rotary LED Transmitter |
| Sub Title (in English) | |
| Keyword(1) | visible light communication (VLC) |
| Keyword(2) | image sensor communication (ISC) |
| Keyword(3) | rotary LED transmitter |
| Keyword(4) | symbol synchronization misalignment |
| Keyword(5) | symbol synchronization method |
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| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Akinori Nakayama |
| 1st Author's Affiliation | Okayama University of Science (Okayama Univ. of Sci.) |
| 2nd Author's Name | Shintaro Arai |
| 2nd Author's Affiliation | Okayama University of Science (Okayama Univ. of Sci.) |
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| Speaker | Author-1 |
| Date Time | 2022-03-11 16:00:00 |
| Presentation Time | 25 minutes |
| Registration for | WBS |
| Paper # | IT2021-136, ISEC2021-101, WBS2021-104, RCC2021-111 |
| Volume (vol) | vol.121 |
| Number (no) | no.428(IT), no.429(ISEC), no.430(WBS), no.431(RCC) |
| Page | pp.307-312 |
| #Pages | 6 |
| Date of Issue | 2022-03-03 (IT, ISEC, WBS, RCC) |
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