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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 [ISSN 1094-4087], v. 24, p. 9994-9999 |
Appears in Collections: | Artículos |
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