On the Performance of SPAD-Based Optical Wireless Communication with ACO-OFDM

Shenjie Huang*, Cheng Chen, Mohammad Dehghani Soltani, Robert K. Henderson, Harald Haas, Majid Safari

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

The nonlinear distortion introduced by the dead time strongly limits the throughput of the highly sensitive SPAD-based optical wireless communication (OWC) systems. Optical OFDM can be employed in the systems with SPAD arrays to improve the spectral efficiency. In this work, a theoretical performance analysis of SPAD-based OWC system with asymmetrically-clipped optical OFDM (ACO-OFDM) is presented. The impact of the SPAD nonlinearity on the system performance is investigated. In addition, the comparison of the considered scheme with DCO-OFDM is presented showing the distinct reliable operation regimes of the two schemes. In low optical power regimes, ACO-OFDM outperforms DCO-OFDM with around 4 dB power gain achieved by 16-QAM ACOOFDM over 4-QAM DCO-OFDM. However, DCO-OFDM is in turn more preferable in high power regimes which extends the maximal tolerable received optical power by 7.4 dB.
Original languageEnglish
Pages (from-to)1809 - 1813
JournalIEEE Communications Letters
Issue number7
Early online date28 Apr 2023
Publication statusPublished - 1 Jul 2023

Keywords / Materials (for Non-textual outputs)

  • Nonlinear distortion
  • Nonlinear optics
  • OFDM
  • Optical distortion
  • Optical receivers
  • Optical wireless communication
  • Photonics
  • Single-photon avalanche diodes
  • orthogonal frequency division multiplexing
  • single-photon avalanche diode


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