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Design and Implementation of a Hybrid Optical Camera Communication System for Indoor Applications.

Huy Nguyen¹, Nam Tuan Le², Duy Tuan Anh Le¹

¹Department of Electronics Engineering, Kookmin University, Seoul 02707, Republic of Korea.

Sensors (Basel, Switzerland)

|January 11, 2024

Summary

This study introduces a novel hybrid modulation for optical camera communication (OCC), using one LED to transmit two data streams captured by two cameras. This cost-effective method enhances indoor wireless communication performance.

Keywords:

IoT application hybrid OCC waveform optical camera communication (OCC)

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Area of Science:

Optical wireless communication
Visible light communication

Background:

Radio-frequency (RF) wireless technologies face limitations.
Optical Camera Communication (OCC) offers an alternative with unique advantages.

Purpose of the Study:

To develop a cost-effective hybrid modulation scheme for Optical Camera Communication (OCC).
To enable dual-stream data transmission from a single Light-Emitting Diode (LED) transmitter.
To ensure compatibility with readily available camera devices.

Main Methods:

A hybrid modulation integrates high-frequency and low-frequency signals.
High-frequency signals utilize rolling-shutter orthogonal frequency-division multiplexing.
Low-frequency signals employ M-ary frequency-shift keying in the time domain.
Data is received using two cameras: a high-resolution smart camera and a low-resolution smartphone camera.

Main Results:

Successfully transmitted two data streams from a single LED, reducing device cost.
Achieved high-performance communication over a 10-meter distance.
Demonstrated compatibility with standard smartphone and USB cameras.

Conclusions:

The proposed hybrid modulation scheme is a viable and cost-effective solution for indoor OCC.
This technology offers a promising alternative to RF-based communication systems.
The system's performance is adaptable through parameter control for various applications.