Analysis of energy saving ability in dimming VLC systems using LEDs with optimized SAHP
Abstract
In this paper, we investigate the energy saving capability of dimming visible light communication (VLC) systems employing SC-4 PPM modulation scheme. We design different optimizations to maximize the energy efficiency according to the different illuminance efficiency with respect to LED's semi-angle at half power (SAHP) for four different LED alignments. Tradeoff between energy efficiency and signal-to-noise ratio (SNR) uniformity are also investigated to achieve better overall performance. The results show that more than 40% energy can be saved over the existing dimmed VLC system employing SC-4 PPM modulation scheme when optimized SAHP LEDs are used.
- Publication:
-
Optics Communications
- Pub Date:
- February 2016
- DOI:
- 10.1016/j.optcom.2015.10.045
- Bibcode:
- 2016OptCo.361...86L
- Keywords:
-
- Visible light communication (VLC);
- Dimming control;
- Energy-efficiency;
- Semi-angle at half power (SAHP)