Summary
International Conference on Emerging Technologies for Communications
2022
Session Number:S9
Session:
Number:S9-5
Influence of Walsh-Hadamard Code Sequency in Visible Light Communication Using an Event Camera
Daiki Ehara, Zhengqiang Tang, Masayuki Kinoshita, Takaya Yamazato, Hiraku Okada, Koji Kamakura, Shintaro Arai, Tomohiro Yendo, Toshiaki Fujii,
pp.-
Publication Date:2022/11/29
Online ISSN:2188-5079
Summary:
The event camera is expected to be used as a new receiver in visible light communication (VLC) for its fast response speed. In VLC, the event camera detects and outputs the brightness change in the blinking LED as an event. However, it is difficult to detect the transmitter LED from the background when the receiver is moving. This is because the changes in background brightness caused by the camera movement is detected as events as well. To solve this problem, this study focuses on the sequency of Walsh-Hadamard codes (WH codes). The sequency is the number of positive and negative exchanges per second. The sequency of a WH-coded fast blinking LED is high compared with the brightness change in the background. In this study, we successfully separated the LED transmitter from the background when the event camera is moving and demodulated the data.