Nguyen, H.; Le, N.T.; Le, D.T.A.; Jang, Y.M. Design and Implementation of a Hybrid Optical Camera Communication System for Indoor Applications. Sensors2024, 24, 300.
Nguyen, H.; Le, N.T.; Le, D.T.A.; Jang, Y.M. Design and Implementation of a Hybrid Optical Camera Communication System for Indoor Applications. Sensors 2024, 24, 300.
Nguyen, H.; Le, N.T.; Le, D.T.A.; Jang, Y.M. Design and Implementation of a Hybrid Optical Camera Communication System for Indoor Applications. Sensors2024, 24, 300.
Nguyen, H.; Le, N.T.; Le, D.T.A.; Jang, Y.M. Design and Implementation of a Hybrid Optical Camera Communication System for Indoor Applications. Sensors 2024, 24, 300.
Abstract
Optical wireless communication is a promising emerging technology that addresses the limitations of radio-frequency-based wireless technologies. This study presents a novel hybrid modulation for optical camera communication (OCC); it integrates two waveforms transmitted from a single transmitter light-emitting diode (LED) and received by two rolling-shutter camera devices. Then, a smart camera with a high-resolution image sensor captures the high-frequency signal, and a low-resolution image sensor from a smartphone camera captures the low-frequency signal. Through this hybrid scheme, two data streams are transmitted from a single LED lamp; this reduces the cost of the indoor OCC device compared to one that transmits two signals from two different LEDs. In proposed scheme, rolling-shutter orthogonal frequency-division multiplexing is used for the high-frequency signals, and M-ary frequency-shift keying is used for the low-frequency signals in the time domain. This proposed scheme is compatible with smart phone camera and USB camera. By controlling the OCC parameters, the hybrid scheme can be implemented with high performance for a communication distance of 10 m.
Keywords
optical camera communication (OCC); hybrid OCC waveform; IoT application
Subject
Engineering, Electrical and Electronic Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
