Realization of High-Speed Data Transmission and Omnidirectional Reception of Image-Sensor-Based Visible Light Communication Using High-Speed Rotary LED Transmitter

2021 Fiscal Year Final Research Report

• Project/Area Number: 17K18282
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Communication/Network engineering; Perceptual information processing
• Research Institution: Okayama University of Science
• Principal Investigator: Arai Shintaro 岡山理科大学, 工学部, 准教授 (10599195)
• Project Period (FY): 2017-04-01 – 2022-03-31
• Keywords: 可視光通信 / LED / イメージセンサ / 回転

Outline of Final Research Achievements

This study focuses on visible light communication using an LED (transmitter) and a camera (receiver). The communication system can spatially separate signals and noises in the image, thus providing superior anti-interference ability. However, because this system's communication speed depends on the camera's shooting speed, the receiver suffers from a low data transmission rate when a low-speed camera is used. To solve this problem, we have proposed a "rotary LED transmitter." This transmitter cylindrically rotates the blinking LEDs during the camera's exposure time. The camera captures multiple blinking states of LEDs in a single image, thereby increasing the amount of data received per image.

Free Research Field

可視光通信

Academic Significance and Societal Importance of the Research Achievements

カメラを受信機に用いた従来の可視光通信では，その通信速度の高速化のために撮影速度の非常に速い高速度カメラを用いる等，受信機側の工夫によって行われるものが多かった．本研究課題で提案した送信機は，それ自体を回転させるというこれまでにない発想で，受信機の機構には改良を加えずに空間サンプリングを行い， 通信速度の高速化を実現した．ここに本技術の特色及び独創性がある．さらに，本技術は回転機構を持つ機器への取り付けも可能であるため，様々な応用が期待される送信機であると言える．