High Speed Imaging 3 × 3 MIMO Phosphor White-Light LED Based Visible Light Communication System

Chin Wei Hsu, Chi Wai Chow*, I. Cheng Lu, Yen Liang Liu, Chien Hung Yeh, Yang Liu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

The phosphor light-emitting diode (LED) has been widely used not only for indoor illumination but for the optical transmitter (Tx) as well in visible light communication (VLC). However, the transmission data rate is significantly limited by the modulation bandwidth of LED because of the low-speed response of phosphor. In order to enhance the data rate of the VLC system, we demonstrate a 3 × 3 imaging multiple-input multiple-output (MIMO) VLC system. Besides, the pre-equalizer circuit is used to extend the bandwidth of the LED Tx. Orthogonal frequency division multiplexing (OFDM) with bit-loading algorithm is used. By using the proposed scheme, the original 1 MHz bandwidth commercially available phosphor white light LED can achieve 1 Gbps data rate over 1-m free-space transmission distance.

Original languageEnglish
Article number7776773
JournalIEEE Photonics Journal
Volume8
Issue number6
DOIs
StatePublished - 1 Dec 2016

Keywords

  • Light-emitting diode (LED)
  • multiple-input multiple-output (MIMO)
  • visible light communication (VLC)

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