Pilot-Aided Frame Synchronization in Optical OFDM Systems

Funmilayo B. Offiong*, Sinan Sinanovic, Wasiu O. Popoola

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)
115 Downloads (Pure)


Efficient frame synchronization is essential for data recovery in communication systems. In this study, a single pilot sequence is used to achieve both frame synchronization and peak-to-average power ratio (PAPR) reduction. The two systems considered are direct-current biased optical orthogonal frequency division multiplexing (DCO-OFDM) and asymmetrically clipped O-OFDM (ACO-OFDM). The pilot symbol is allocated to odd indexed subcarriers only. Thus, the synchronization algorithm leverages the mirror symmetric property of the pilot symbol within a frame to detect the start of the pilot signal at the receiver. This scheme has low complexity and gives precise frame synchronization at signal-to-noise ratios as low as 4 dB in an indoor visible light communication (VLC) channel.
Original languageEnglish
Article number4034
Number of pages9
JournalApplied Sciences
Issue number11
Early online date11 Jun 2020
Publication statusPublished - Jun 2020


  • Pilot symbol
  • Optical OFDM
  • Frame synchronization
  • Correlation-based method
  • Symbol timing estimation
  • Optical wireless communication

ASJC Scopus subject areas

  • General Engineering
  • Instrumentation
  • General Materials Science
  • Fluid Flow and Transfer Processes
  • Process Chemistry and Technology
  • Computer Science Applications


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