Iterative decision-directed receiver for the mitigation of side-effect modulation in indoor VLC applications

Mohammed M.A. Mohammed, Cuiwei He, Jean Armstong

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

Abstract

Side effect modulation (SEM) has been shown to be an important impairment in visible light communication (VLC) systems. SEM is the unintended modulation of the light caused by the switched mode power supplies which are often used in light emitting diode (LED) luminaires. These power supplies may result in fluctuations in the driving current. In this paper, we investigate the performance of VLC in two different configurations. In both configurations, simulation results show that even low levels of SEM can substantially degrade the performance for most receiver positions. An iterative decision-directed receiver is described which mitigates the effect of SEM. In this receiver, the fundamental frequency component of SEM is estimated and removed from the received signal. The iterative processing is used to improve the estimation accuracy and thus improve performance. The iterative receiver is compared to the previously described decision-directed and pilot-assisted receivers. It is shown that, with only two iterations, the iterative decision-directed receiver effectively mitigates the impact of SEM.

Original languageEnglish
Title of host publication2018 28th International Telecommunication Networks and Applications Conference (ITNAC)
EditorsKhandakar E Ahmed, Kashinath Basu, Keshav Sood
Place of PublicationPiscataway NJ USA
PublisherIEEE, Institute of Electrical and Electronics Engineers
Pages343-348
Number of pages6
ISBN (Electronic)9781538671771, 9781538671764
ISBN (Print)9781538671788
DOIs
Publication statusPublished - 2018
EventInternational Telecommunication Networks and Applications Conference 2018 - Sydney, Australia
Duration: 21 Nov 201823 Nov 2018
Conference number: 28th
https://itnac.org.au/2018/21-23-november-2018-university-new-south-wales-sydney-australia (Conference website)
https://ieeexplore.ieee.org/xpl/conhome/8598648/proceeding (Proceedings)

Conference

ConferenceInternational Telecommunication Networks and Applications Conference 2018
Abbreviated titleITNAC 2018
CountryAustralia
CitySydney
Period21/11/1823/11/18
Internet address

Keywords

  • ACO-OFDM
  • estimation
  • interference
  • side-effect modulation
  • VLC

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