Comparing the Performance of OFDM and OCDM-based Visible Light Communications: Numerical and Experimental Analysis

Augusto CF Peterle, Wesley Da Silva Costa, Higor Camporez, Marcelo Segatto, Helder Rocha, Jair AL Silva

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Numerical and experimental analysis of visible light communication (VLC) systems based on orthogonal chirp division multiplexing (OCDM) and orthogonal frequency division multiplexing (OFDM) are presented in this paper. Unlike most of the related publications, in this work we numerically compared OCDM and OFDM based VLC systems with the same equalization process, i.e., employing an one tap equalizer (OTE) in both systems. Simulation results in line-of-sight VLC channels show that both systems have the same performance when baseband multicarrier signals are used. The impact of the optical modulation index and the bias current of a previously characterized light-emitting diode were also evaluated. Nevertheless, the experimental demonstrations, in which bandpass signals were used due to the bandpass characteristic of the exploited setup, show that OFDM-based system outperforms the VLC links with OCDM signals, when the OTE equalizer is used in both systems. The performance of the OCDM-based system was improved by using a zero forcing frequency domain equalizer.
Original languageEnglish
Pages (from-to)196-207
Number of pages12
JournalJournal of Microwaves, Optoelectronics and Electromagnetic Applications
Volume22
Issue number1
DOIs
Publication statusPublished - 2023
Externally publishedYes

Keywords

  • equalization
  • visible light communication
  • ocdm
  • ofdm

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