On the Use of Class D Switching-Mode Power Amplifiers in Visible Light Communication Transmitters.

Area of Science:

• Wireless Communication Technologies
• Optical Engineering
• Power Electronics

Background:

• Visible Light Communication (VLC) systems commonly use Linear Power Amplifiers (LPAs) for signal transmission.
• LPAs exhibit low power efficiency, leading to significant heat generation and reduced overall system performance.
• High-Brightness LEDs (HB-LEDs) are crucial components in VLC transmitters, requiring efficient power management.

Purpose of the Study:

• To investigate the application of Class D Switching-Mode Power Amplifiers (SMPAs) in VLC transmitters.
• To identify and adapt the optimal Class D SMPA topology and modulation strategy for VLC.
• To enhance the power efficiency of VLC transmitters and mitigate heat dissipation issues.

Main Methods:

• Exploration of various Class D SMPA topologies and modulation techniques.
• Adaptation and detailed explanation of the most suitable Class D SMPA approach for VLC.
• Implementation and evaluation of a prototype power-efficient VLC transmitter.

Main Results:

• Demonstration of Class D SMPA as a viable alternative to LPAs in VLC transmitters.
• Significant improvement in power efficiency compared to traditional LPA-based systems.
• Successful validation of the proposed approach in a functional VLC transmitter.

Conclusions:

• Class D SMPAs offer a substantial improvement in power efficiency for VLC transmitters.
• The proposed method effectively addresses the limitations of LPAs, reducing energy consumption and cooling requirements.
• This research paves the way for more efficient and sustainable VLC system designs.