Convex optimization approach to multi-level modulation for dimmable visible light communications under LED efficiency droop

Sang Hyun Lee, Il Kyu Park, Jae Kyun Kwon

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish
Pages (from-to)29-35
Number of pages7
JournalJournal of the Optical Society of Korea
Volume20
Issue number1
DOIs
Publication statusPublished - 2016 Feb
Externally publishedYes

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (No. NRF-2015R1C1A1A01052529 and No. NRF-2014R1A1A1006082). This work was also supported by the 2013 Yeungnam University Research Grant.

Publisher Copyright:
© 2016, Optical Society of Korea. All rights reserved.

Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.

Keywords

  • Convex optimization
  • Dimming
  • Efficiency droop
  • Visible light communications

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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