Time domain reshuffling for OFDM based indoor visible light communications

Xiaodi You, Jian Chen, Changyuan Yu, Zabih Ghassemlooy

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

1 Citation (Scopus)

Abstract

For orthogonal frequency division multiplexing (OFDM) based indoor visible light communication (VLC) systems, we show that the subcarrier channels tend to synchronize and add up to a resultant high peak signal at the leading edge of each symbol when using certain types of modulation formats. Thus, occasional non-ideal transmission conditions such as insufficient guard intervals and a dispersive channel will result in inter-symbol crosstalk. This paper presents a time domain reshuffling (TDR) technique for both DC-biased optical (DCO-) and asymmetrically clipped optical (ACO-) OFDM based VLC systems. Only by simple operations in the frequency domain, the potential high peaks can be relocated in each OFDM symbol to alleviate the crosstalk. Based on Monte-Carlo simulations, we demonstrate the statistical distribution of the signal high peak values and the complementary cumulative distribution function of the peak-to-average power ratio for comparison. By adopting the TDR method, we show that the bit error rate performance can be also improved for both DCO- and ACO-OFDM systems under occasional non-ideal transmission conditions.
Original languageEnglish
Title of host publication2016 10th International Symposium on Communication Systems, Networks and Digital Signal Processing, CSNDSP 2016
PublisherIEEE
ISBN (Electronic)9781509025268
DOIs
Publication statusPublished - 21 Sep 2016
Event10th International Symposium on Communication Systems, Networks and Digital Signal Processing, CSNDSP 2016 - Prague, Czech Republic
Duration: 20 Jul 201623 Jul 2016

Conference

Conference10th International Symposium on Communication Systems, Networks and Digital Signal Processing, CSNDSP 2016
CountryCzech Republic
CityPrague
Period20/07/1623/07/16

Keywords

  • ACO-OFDM
  • DCO-OFDM
  • time domain reshuffling
  • Visible light communications

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Computer Science Applications
  • Signal Processing

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