Analysis of energy saving ability in dimming VLC systems using LEDs with optimized SAHP

作者：Fang Li, Kan Wu, Weiwen Zou, Jianping Chen *
摘要：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.
出版源：Optics Communications, vol. 361, pp. 86-96, 2016.