Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/52589
Title: Constraints on drivers for visible light communications emitters based on energy efficiency
Authors: Del Campo-Jimenez, Guillermo
Perez-Jimenez, Rafael 
Lopez-Hernandez, Francisco Jose
UNESCO Clasification: 2209 Óptica
Keywords: Ofdm
Issue Date: 2016
Journal: Optics Express 
Abstract: In this work we analyze the energy efficiency constraints on drivers for Visible light communication (VLC) emitters. This is the main reason why LED is becoming the main source of illumination. We study the effect of the waveform shape and the modulation techniques on the overall energy efficiency of an LED lamp. For a similar level of illumination, we calculate the emitter energy efficiency ratio η (PLED/PTOTAL) for different signals. We compare switched and sinusoidal signals and analyze the effect of both OOK and OFDM modulation techniques depending on the power supply adjustment, level of illumination and signal amplitude distortion. Switched and OOK signals present higher energy efficiency behaviors (0.86≤η≤0.95) than sinusoidal and OFDM signals (0.53≤η≤0.79).
URI: http://hdl.handle.net/10553/52589
ISSN: 1094-4087
DOI: 10.1364/OE.24.009994
Source: Optics Express,v. 24, p. 9994-9999
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