Demonstration of symbol timing synchronization for rolling shutter-based optical camera communication.

Area of Science:

• Engineering
• Computer Science
• Physics

Background:

• Optical Camera Communication (OCC) offers license-free, radio-wave-free communication.
• Rolling shutter cameras show potential for increasing wireless link capacity in OCC systems.
• Existing OCC methods face signal erasure issues due to frame waiting times.

Purpose of the Study:

• To propose a symbol timing synchronization technique for OCC utilizing a rolling shutter camera.
• To address and mitigate signal erasure in OCC caused by frame transmission delays.
• To analyze the theoretical performance limits of the proposed synchronization method.

Main Methods:

• Implementing a symbol timing synchronization system for OCC with a rolling shutter camera.
• Calculating additional waiting time at the receiver based on preamble signals for synchronization.
• Conducting performance analysis to determine theoretical limits.

Main Results:

• The proposed method synchronizes the receiver camera to the transmitter by computing optimal waiting times.
• Theoretical performance analysis was conducted to establish performance boundaries.
• Experimental validation confirmed the feasibility of the developed synchronization technique.

Conclusions:

• The developed symbol timing synchronization is effective for OCC using rolling shutter cameras.
• The proposed method successfully addresses signal erasure issues in OCC.
• Experimental results validate the theoretical analysis and practical applicability of the OCC synchronization technique.