On the brightness control of ACO-OFDM based VLC systems

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this work, we analyze the brightness performance of asymmetrically clipped optical orthogonal frequency division multiplexing (ACO-OFDM) based visible light communication (VLC) systems. We specifically consider analog dimming where the brightness is controlled by the average forward voltage/current of the LEDs. In ACO-OFDM, the forward current of the LEDs can be jointly controlled by the DC-bias and useful signal power which have direct impact on the signal-to-noise-distortion-ratio (SNDR). In this work, we maximize the SNDR for a targeted brightness level by jointly optimizing the DC-bias and useful signal power levels. We further propose clipping the positive part of the half-wave symmetry information waveform instead of the negative part (for ACO-OFDM signal generation) in order to achieve higher SNDR values at high brightness requirements.

Original languageEnglish
Title of host publication2015 9th International Conference on Sensing Technology, ICST 2015
PublisherIEEE Computer Society
Pages215-218
Number of pages4
ISBN (Electronic)9781479963140
DOIs
Publication statusPublished - Mar 21 2016
Event9th International Conference on Sensing Technology, ICST 2015 - Auckland, New Zealand
Duration: Dec 8 2015Dec 11 2015

Publication series

NameProceedings of the International Conference on Sensing Technology, ICST
Volume2016-March
ISSN (Print)2156-8065
ISSN (Electronic)2156-8073

Other

Other9th International Conference on Sensing Technology, ICST 2015
CountryNew Zealand
CityAuckland
Period12/8/1512/11/15

Keywords

  • Asymmetrically Clipped Optical OFDM
  • Brightness Control
  • Dimming
  • Interference
  • OFDM
  • Visible light communication

ASJC Scopus subject areas

  • Artificial Intelligence
  • Computer Science Applications
  • Signal Processing
  • Electrical and Electronic Engineering

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