Enhancing the performance of optical camera communication via accumulative sampling

Area of Science:

• Optical Camera Communication
• Visible Light Communication
• Wireless Communication

Background:

• Optical Camera Communication (OCC) leverages ubiquitous LED lighting and smartphones for visible light communication.
• Current OCC systems face performance limitations due to the low sampling capabilities of smartphone cameras.

Purpose of the Study:

• To investigate smartphone camera reception capabilities for OCC.
• To propose and validate an accumulative sampling scheme to enhance OCC system performance.

Main Methods:

• Developed an accumulative sampling scheme utilizing all grayscale pixel information from LED transmitters.
• Implemented a lightweight demodulation algorithm incorporating the accumulative sampling technique.
• Experimentally verified the scheme's effectiveness on commercial smartphones (Samsung S8, iPhone 8 Plus).

Main Results:

• The proposed method supports higher transmission frequencies, leading to improved data rates.
• Bit Error Rates (BERs) were reduced by over 87% (Samsung S8) and 96% (iPhone 8 Plus) compared to baseline methods at 5 kHz.
• Demonstrated significant performance gains in OCC systems using readily available smartphone hardware.

Conclusions:

• The accumulative sampling scheme effectively overcomes the limitations of conventional OCC systems.
• This approach enhances the practical viability of OCC for high-performance visible light communication.
• Smartphone-based OCC systems can achieve significantly better data rates and reliability with this proposed method.