Performance Improvement of Visible Light Communication System Using Multiple Cameras

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K23520
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Multi-year Fund
• Review Section: 0302:Electrical and electronic engineering and related fields
• Research Institution: Chiba Institute of Technology
• Principal Investigator: Kinoshita Masayuki 千葉工業大学, 工学部, 助教 (80845149)
• Project Period (FY): 2019-08-30 – 2022-03-31
• Keywords: 可視光通信 / イメージセンサ / IoT

Outline of Final Research Achievements

In this work, diversity reception using multiple rolling shutter cameras was studied and experimentally evaluated. In visible light communication using rolling shutter cameras, although the data rate can be improved, the communication distance is limited due to the non-uniform luminance distribution. To address this issue, we improved the communication performance by selecting the received signals obtained from multiple cameras. We conducted an experiment in a static indoor environment to compare the communication performance between the proposed selective reception and the conventional single camera reception. As a result, the proposed selective reception improved the communication performance (bit error rate) by 10^-1 compared to the single camera reception.

Free Research Field

可視光通信

Academic Significance and Societal Importance of the Research Achievements

近年，スマートフォンや自動車などカメラは至る所に搭載されつつあり，1台当たりのスマートフォンや自動車に搭載されるカメラの数も増加傾向にある．従来のイメージセンサ可視光通信では単眼カメラを受信機に用いることが一般的であったが，本研究では遍在する複数台のカメラを活用することで通信性能を向上させた点に学術的意義がある．また，複数カメラを利用した受信機構成は，通信性能を向上させるだけでなく，マシンビジョンとの併用も可能であり，ドローンなどのIoT機器の遠隔制御・自動制御，とりわけ，電波の利用が制限される場所（水中，トンネル内，病院，宇宙など）での応用が期待できる点に社会的意義がある．