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Efficient Visible Light Communication Transmitters Based on Switching-Mode dc-dc Converters.
Juan Rodríguez1, Diego G Lamar2, Daniel G Aller3
1Power Supply Group, Electrical Engineering Department, University of Oviedo, Gijón 33204, Spain. rodriguezmjuan@uniovi.es.
Sensors (Basel, Switzerland)
|April 13, 2018
Summary
Visible light communication (VLC) systems use LED lighting for wireless data transfer. This study presents methods to enhance LED driver bandwidth for high-speed VLC, maintaining power efficiency.
Area of Science:
- Electrical Engineering
- Optical Communications
- Solid-State Lighting
Background:
- Visible light communication (VLC) offers an alternative to radio frequency (RF) wireless systems.
- LEDs enable fast modulation for VLC, requiring efficient LED drivers.
- High bandwidth demands in VLC present design challenges for switching-mode dc-to-dc converters (SMCdc-dc).
Purpose of the Study:
- To present and evaluate methods for achieving high bandwidth in SMCdc-dc converters for VLC transmitters.
- To demonstrate that VLC can be integrated into solid-state lighting (SSL) without compromising power efficiency.
Main Methods:
- Investigated three strategies: increasing output filter order, increasing voltage inputs, and increasing phase count.
- Developed an experimental VLC transmitter using a two-phase buck converter with a fourth-order output filter.
Main Results:
- Achieved bandwidths in the hundreds of kilohertz (kHz).
- Demonstrated high power efficiency (85-90%) at output power levels near 10 W.
- Confirmed the effectiveness of combined strategies for specific VLC applications.
Conclusions:
- The proposed design strategies enable high-bandwidth VLC integration into SSL systems.
- High bit rates are achievable with maintained power efficiency in LED lighting.
- Optimized SMCdc-dc converter design is crucial for effective VLC transmitters.
Keywords:
light emitting diode (LED)switching-mode dc-to-dc converter (SMCdc-dc)visible light communication (VLC)More Related Videos
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