Journal
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
Volume 9, Issue 1, Pages 138-145Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JESTPE.2020.2965774
Keywords
Class E amplifier; high-brightness light-emitting diodes (HB-LEDs); visible light communication (VLC); wireless communication
Categories
Funding
- European Regional Development Fund
- Spanish Government [MINECO-17-DPI2016-75760-R, MINECO-20-PID2019110483RB-I00, MCIU-19-RTI2018-099682-A-I00]
- Principality of Asturias [IDI/2018/000179, BP1791]
Ask authors/readers for more resources
Visible light communication (VLC) utilizes LEDs for information transmission, but modifying the LED driver stage can lead to decreased power efficiency. Current research on VLC mainly focuses on communication tasks, with limited work on improving power efficiency. This article proposes a high-efficiency LED driver based on the outphasing technique, achieving high signal generation efficiency and overall efficiency.
Visible light communication (VLC) takes advantage of the widespread use of the light-emitting diodes (LEDs), and by modifying the driver stage, the LEDs are capable of lighting and transmitting information. One of the main drawbacks is the low power efficiency due to the modification of the LED driver stage in order to add the communication capability. Most of the research work related to VLC is toward the communication task, whereas there is a limited work about the improvement on power efficiency. This article proposes a high-efficiency LED driver for VLC working as a transmitter based on the outphasing technique. This technique is used also in radio frequency (RF) communications and increases the efficiency of the amplifiers. The proposed transmitter is made up of two switching-mode power amplifiers that reproduce the signals required for the outphasing technique and a dc/dc converter that biases the LEDs. The proposal exploits the light and, instead of being added electrically, the signals are added in their light form, which leads to a reduction in the complexity of the design. As experimental results, a transmitter was built of two Class E amplifiers reproducing a 16-QAM modulation, achieving a signal-generation efficiency of 78% and an overall efficiency of 92%.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available