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http://dx.doi.org/10.3807/JOSK.2016.20.1.029

Convex Optimization Approach to Multi-Level Modulation for Dimmable Visible Light Communications under LED Efficiency Droop  

Lee, Sang Hyun (Department of Electrical Engineering, Sejong University)
Park, Il-Kyu (Department of Materials Science and Engineering, Seoul National University of Science and Technology)
Kwon, Jae Kyun (Department of Electronic Engineering, Yeungnam University)
Publication Information
Journal of the Optical Society of Korea / v.20, no.1, 2016 , pp. 29-35 More about this Journal
Abstract
This paper deals with a design method and capacity loss of an efficient multi-level modulation scheme for dimmable visible light communications (VLC) systems that use light-emitting diodes (LEDs) with efficiency droop. To this end, the impact of such an impairment on dimmable VLC is addressed with respect to multi-level modulations based on pulse-amplitude modulation (PAM) via data-rate optimization formulation.
Keywords
Visible light communications; Efficiency droop; Dimming; Convex optimization;
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