Two-Level Laser Diode Color-Shift-Keying Orthogonal-Frequency-Division-Multiplexing (LD-CSK-OFDM) for Optical Wireless Communications (OWC)

Wahyu Hendra Gunawan, Y. Liu, C. W. Chow, Yun Han Chang, C. W. Peng, Chien Hung Yeh

Research output: Contribution to journalArticlepeer-review

Abstract

Optical wireless communication (OWC) technology has attracted many attentions recently. Lighting luminaries equipped with red-green-blue (RGB) based light-emitting-diodes (LEDs) or laser-diode (LDs) can modify the perceived color of illumination. These highly directional light sources with adjustable perceived colors makes them very suitable for high speed and high security data transmissions. Here, we propose and demonstrate a two-level LD based color-shift-keying orthogonal-frequency- division-multiplexing (CSK OFDM) signal for the OWC systems. This scheme cannot only provide non-flickering effect to minimize human health concern, but also can enhance the transmission data rate of the CSK system. Here, the system model and the implementation of bit and power loading algorithm on the LD-CSK-OFDM are discussed. Experimentally results show that the demonstrated LD-CSK-OFDM signal can achieve data rate of 28.4 Gbit/s with 1.25 m free-space transmission distance satisfying the forward-error-correction (FEC) threshold.

Original languageEnglish
JournalJournal of Lightwave Technology
DOIs
StateAccepted/In press - 2021

Keywords

  • Color shift keying (CSK)
  • Decoding
  • Encoding
  • Image color analysis
  • Laser diode (LD)
  • Light emitting diodes
  • Lighting
  • OFDM
  • Optical wireless communication (OWC)
  • Orthogonal frequency division multiplexing (OFDM)
  • Visible light communication (VLC)
  • Wireless communication

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