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Design of a Linear-Assisted VLC-LED Transmitter Based on Summing the Light

Author:
García Aller, DanielUniovi authority; González Lamar, DiegoUniovi authority; Fernández Miaja, PabloUniovi authority; Rodríguez Méndez, JuanUniovi authority; Sebastián Zúñiga, Francisco JavierUniovi authority
Publication date:
2019-10
Editorial:

IEEE

Publisher version:
http://dx.doi.org/10.1109/IECON.2019.8927718
Abstract:

A high efficiency linear-assisted Visible Light Communication (VLC) LED driver working as a transmitter is presented in this work. A linear-assisted transmitter is based on the idea of using a high efficiency but bandwidth limited circuitry which delivers most of the power and a low efficiency but fast linear amplifier (linear assistance) which corrects the distortion of the signal. The presented solution takes advantage of the light in a VLC system by summing the contribution of the linear amplifier in light instead of electrically, which leads to a electrical isolation between both stages and a reduction of the complexity comparing to the traditional approach used in Envelope Tracking (ET) and Envelope Elimination and Restoration (EER) techniques. As experimental results, the design of a linear-assisted Class E amplifier delivering a 16-PSK phase digital modulation with a 1 MHz carrier is presented. On one hand, the Class E amplifier delivers most of the power (92% of the signal power) at high efficiency (81%) and, on the other hand, the linear amplifier only delivers the error signal at lower efficiency. The efficiency of the signal circuitry is up to 75% and the efficiency of the whole system considering the signal and the LED biasing circuitry is up to 85%

A high efficiency linear-assisted Visible Light Communication (VLC) LED driver working as a transmitter is presented in this work. A linear-assisted transmitter is based on the idea of using a high efficiency but bandwidth limited circuitry which delivers most of the power and a low efficiency but fast linear amplifier (linear assistance) which corrects the distortion of the signal. The presented solution takes advantage of the light in a VLC system by summing the contribution of the linear amplifier in light instead of electrically, which leads to a electrical isolation between both stages and a reduction of the complexity comparing to the traditional approach used in Envelope Tracking (ET) and Envelope Elimination and Restoration (EER) techniques. As experimental results, the design of a linear-assisted Class E amplifier delivering a 16-PSK phase digital modulation with a 1 MHz carrier is presented. On one hand, the Class E amplifier delivers most of the power (92% of the signal power) at high efficiency (81%) and, on the other hand, the linear amplifier only delivers the error signal at lower efficiency. The efficiency of the signal circuitry is up to 75% and the efficiency of the whole system considering the signal and the LED biasing circuitry is up to 85%

Description:

Annual Conference of the IEEE Industrial Electronics Society (IES) (45th. 2019. Lisboa)

URI:
http://hdl.handle.net/10651/53500
DOI:
10.1109/IECON.2019.8927718
Patrocinado por:

This work was supported in part by European Regional Development Fund grants, in part by the Spanish Government under project MINECO-17- DPI2016-75760-R, and in part by the Principality of Asturias under project IDI/2018/000179 and scholarship BP17-91

Id. Proyecto:

MINECO/17-DPI2016-75760-R

Principado de Asturias/IDI-2018-000179

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