Performance Evaluation of White LED-based OFDM-VLC Systems with Blue Filters: Experimental Study

Sezer Can Tokgoz, Noha Anous, Serhan Yarkan, Ali Boyaci, Khalid A. Qaraqe

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

Abstract

This paper experimentally evaluates the performance of visible light communications (VLC) systems employing phosphor-coated white light emitting diodes (LEDs). Phosphor-coated white LEDs though widely used commercially, are known to limit the system's maximum data rate. Such a limitation is conventionally treated by two methods: either adding a blue filter at the receiver or using orthogonal frequency multiplexing (OFDM) digital modulation technique. Adding a blue filter at the receiver is controversial in current literature and claimed to decrease the signal-to-noise-ratio (SNR) or to be inefficient if OFDM is employed. Hence, in this work, we experimentally evaluate the above OFDM based VLC system with and without a blue filter. Results are compared to prove that adding a blue filter at the receiver boosts SNR and bit-error-rate (BER) values. This, in turn, helps maximize the data rates supported by such systems. The addition of a blue filter is tested with different modulation techniques. Results in this work remove the controversy around employing a blue filter in OFDM based VLC systems with phosphor-coated white LEDs. Improved BERs and SNRs at high data rates are observed. Specifically, this experimental work demonstrates a BER enhancement of ∼40% and ∼15% for data rates up to 12 Mbps when a blue filter is added.

Original languageEnglish
Title of host publication16th International Multi-Conference on Systems, Signals and Devices, SSD 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages686-690
Number of pages5
ISBN (Electronic)9781728118208
DOIs
Publication statusPublished - Mar 2019
Event16th International Multi-Conference on Systems, Signals and Devices, SSD 2019 - Istanbul, Turkey
Duration: 21 Mar 201924 Mar 2019

Publication series

Name16th International Multi-Conference on Systems, Signals and Devices, SSD 2019

Conference

Conference16th International Multi-Conference on Systems, Signals and Devices, SSD 2019
CountryTurkey
CityIstanbul
Period21/3/1924/3/19

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Keywords

  • OFDM
  • VLC
  • blue filters
  • experimental study
  • phosphor LEDs

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Hardware and Architecture
  • Signal Processing
  • Control and Systems Engineering
  • Control and Optimization
  • Instrumentation

Cite this

Tokgoz, S. C., Anous, N., Yarkan, S., Boyaci, A., & Qaraqe, K. A. (2019). Performance Evaluation of White LED-based OFDM-VLC Systems with Blue Filters: Experimental Study. In 16th International Multi-Conference on Systems, Signals and Devices, SSD 2019 (pp. 686-690). [8893211] (16th International Multi-Conference on Systems, Signals and Devices, SSD 2019). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/SSD.2019.8893211