Summary
International Conference on Emerging Technologies for Communications
2022
Session Number:S9
Session:
Number:S9-6
Study on Visible Light Communication System Using Low-Speed Camera and Circular Scanning
Ryosuke Izumi, Tadashi Ebihara, Naoto Wakatsuki, Yuka Maeda, Koichi Mizutani,
pp.-
Publication Date:2022/11/29
Online ISSN:2188-5079
Summary:
We propose a visible light communication system using a receiver combined with a general-purpose camera and an optical scanner with circular scanning method. The transmitter modulates the data and transmits it as high-speed flashes of light-emitting diodes (LEDs). The receiver performs spatiotemporal mapping of the signal using an optical scanner (galvo mirror), and the image sensor receives multiple symbols within one frame time. Conventional receivers scan the high-speed blinking on the image sensor linearly. While this method is easy to extract and demodulate signals, there is a problem that the communication quality is significantly degraded when there is interference between the signal and noise (other scanning light). Therefore, circular scanning is newly introduced to minimize interference between signal and noise. The performance of the proposed visible light communication system was evaluated by experiment. The experimental results suggest that the proposed receiver can cope with the interference between the signal and the ambient light and achieve excellent communication quality.