A Performance Comparison of OFDM and Pulsed PHY Modulations in Optical Wireless Communications

Malte Hinrichs, Wesley Costa, Helder Rocha, Maria Pontes, Marcelo Segatto, Anagnostis Paraskevopoulos, Volker Jungnickel, Ronald Freund, Jair Silva

Research output: Chapter in Book/Report/Conference proceedingContribution to conference proceedingAcademicpeer-review

Abstract

In this paper, we experimentally compare orthogonal frequency-division multiplexing (OFDM) and on-off keying (OOK) modulation in the context of the IEEE 802.15.13-2023 standard at bandwidths up to 50 MHz across a Li-Fi link with distances up to 5 m and a lateral offset up to 51°. Error vector magnitude (EVM) and bit error rate (BER) evaluations confirm that the high peak-to-average power ratio (PAPR) of OFDM limits the achievable transmission distance, but it offers higher data rates due to its higher spectral efficiency. Due to the lower PAPR, OOK-based Pulsed Modulation PHY (PM-PHY) shows a significantly higher link range. As the structure of the PM-PHY is based on OFDM symbols, the two solutions may also be combined to open a wider range of use cases for optical wireless communications.
Original languageEnglish
Title of host publication2023 South American Conference On Visible Light Communications (SACVLC)
PublisherInstitute of Electrical and Electronics Engineers
Pages124-129
Number of pages6
ISBN (Electronic)979-8-3503-5860-5
ISBN (Print)9798350358605
DOIs
Publication statusPublished - 12 Dec 2023
Event2023 South American Conference On Visible Light Communications (SACVLC) - Santiago, Chile
Duration: 8 Nov 202310 Nov 2023

Conference

Conference2023 South American Conference On Visible Light Communications (SACVLC)
Period8/11/2310/11/23

Keywords

  • optical wireless communications
  • OFDM
  • bit error rate
  • symbols
  • peak to average power ratio
  • adaptive optics
  • pulsed modulation

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