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Paper Abstract and Keywords
Presentation 2022-07-14 16:15
M-point Combinatory for Parallel Transmission Image Sensor-based Visible Light Communications
Takumi Sato, Koji Kamakura, Masayuki Kinoshita (CIT), Takaya Yamazato (Nagoya Univ.) CS2022-28
Abstract (in Japanese) (See Japanese page) 
(in English) An $M$-point combinatory (MC) modulation is proposed for parallel transmission (PT) image sensor (IS)-based visible light communication (VLC). In the conventional PT system, $M_0$ discrete signals which incorporate $N=(M_0-1)/2$ spatial frequencies are transmitted in parallel with $M_0$ transmitting regions of liquid crystal display (LCD). When each of spatial frequencies is modulated with $P$-ary phase shift keying ($P$-PSK), the number of bits transmitted in one frame is given by $k=N log_2 P$,bits. $k$ increases when the number of spatial frequencies $N$ increases with increasing $M_0$, but at same time, the peak-to-average power ratio (PAPR) becomes high because the signal of the PT system is essentially orthogonal frequency modulation. Therefore, the number of spatial frequencies $N$ without any error remains at a very low number. In this paper, we propose an MC modulation, which is combined with the PT system to increase the number of bits per frame that the system carries without any error. In our proposed MC PT system, $M$ out of the $M_0$ transmitting regions are used, where $M leq M_0$. Since there are $binom{M_0}{M}$ ways in choosing $M$ out of the $M_0$ ones, we map them to $ell= left lfloor log_2 binom{M_0}{M} right rfloor$,bits. According to $ell$,bits, $M$ transmitting regions are chosen for a frame, and then the $M$ chosen ones are used to transmit $M$ discrete signals of the PT system. Our experimental results show that our proposed MC PT system with 8-PSK achieves $697$,bits/frame with keeping no error being observed, while the conventional PT system achieves only 180,bits/frame.
Keyword (in Japanese) (See Japanese page) 
(in English) Visible light communications / Optical wireless communications / Image sensor communications / Parallel transmission / Spatial OFDM / Parallel combinatory / /  
Reference Info. IEICE Tech. Rep., vol. 122, no. 110, CS2022-28, pp. 63-68, July 2022.
Paper # CS2022-28 
Date of Issue 2022-07-07 (CS) 
ISSN Online edition: ISSN 2432-6380
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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 CS  
Conference Date 2022-07-14 - 2022-07-15 
Place (in Japanese) (See Japanese page) 
Place (in English) Yakushima Environmental and Cultural Village Center 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Next Generation Networks, Access Networks, Broadband Access, Power Line Communications, Wireless Communication Systems, Coding Systems, etc. 
Paper Information
Registration To CS 
Conference Code 2022-07-CS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) M-point Combinatory for Parallel Transmission Image Sensor-based Visible Light Communications 
Sub Title (in English)  
Keyword(1) Visible light communications  
Keyword(2) Optical wireless communications  
Keyword(3) Image sensor communications  
Keyword(4) Parallel transmission  
Keyword(5) Spatial OFDM  
Keyword(6) Parallel combinatory  
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Keyword(8)  
1st Author's Name Takumi Sato  
1st Author's Affiliation Chiba Institute of Technology (CIT)
2nd Author's Name Koji Kamakura  
2nd Author's Affiliation Chiba Institute of Technology (CIT)
3rd Author's Name Masayuki Kinoshita  
3rd Author's Affiliation Chiba Institute of Technology (CIT)
4th Author's Name Takaya Yamazato  
4th Author's Affiliation Nagoya University (Nagoya Univ.)
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Speaker Author-1 
Date Time 2022-07-14 16:15:00 
Presentation Time 25 minutes 
Registration for CS 
Paper # CS2022-28 
Volume (vol) vol.122 
Number (no) no.110 
Page pp.63-68 
#Pages
Date of Issue 2022-07-07 (CS) 


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