Coverage extension technology for image sensor type visible light communication

2022 Fiscal Year Final Research Report

• Project/Area Number: 19K04378
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 21020:Communication and network engineering-related
• Research Institution: Chiba Institute of Technology
• Principal Investigator: Kamakura Koji 千葉工業大学, 情報科学部, 教授 (60344967)
• Project Period (FY): 2019-04-01 – 2023-03-31
• Keywords: 可視光通信 / 時空間符号化 / イメージセンサ / LED / 階層的符号化 / 二次元通信路 / 光直交周波数分割多重

Outline of Final Research Achievements

This research focused on two-dimensional arrangement of multiple light-emitting diodes and applied visible light communication (VLC) received by an image sensor installed in a camera to an intelligent transportation system. In VLC, which receives data sent from multiple LEDs with IS, multiple data with different data rates can be processed in an environment where encoding technology to expand the communication range and camera receivers operating at different frame rates coexist. This was the establishment of superimposition transmission technology that transmits from a single transmitter. VLC using IS had a limited communication distance due to the resolution of discretely arranged pixels. Higher speed is now possible.

Free Research Field

通信工学

Academic Significance and Societal Importance of the Research Achievements

本研究課題の学術的意義は，これまでの単一フォトダイードを受信機とする可視光通信（VLC）が一次元通信路でしかなかったのに対して，申請者が対象とするVLCは，二次元的に配置されたLEDからの送信光を，その二次元構造を保ったままIS上の各ピクセルにおける輝度値として記録される点にある．このような二次元通信路を研究対象とし，その二次元通信路の面の大きさが，距離に応じて縮退する場合にも通信を続けさせるという学術的「問い」に，符号化という点で解決手段を提示する点は革新的である．