Link Adaptation for MIMO OFDM Visible Light Communication Systems

Omer Narmanlioglu, Refik Caglar Kizilirmak, Tuncer Baykas, Murat Uysal

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

In this paper, we investigate link adaptation for an orthogonal frequency division multiplexing (OFDM)-based multiple-input multiple-output (MIMO) visible light communication (VLC) system. The proposed adaptive OFDM VLC system supports both repetition coding (RC) and spatial multiplexing (SM) as MIMO modes and allows spatial mode switching based on channel conditions. Based on the instantaneous signal-to-noise ratio for both RC and SM modes, the maximum constellation size that can be supported for each MIMO mode on each subcarrier is determined. The MIMO mode that gives the highest spectral efficiency (SE) is then selected. The proposed joint MIMO mode selection and bit loading scheme maximizes the SE while satisfying a target bit error rate. Our numerical results reveal that a peak data rate up to 18.3 Gbits/sec can be achieved in a 16×16 MIMO setting using light emitting diodes (LEDs) with cut-off frequency of 10 MHz in typical indoor environments.

Original languageEnglish
JournalIEEE Access
DOIs
Publication statusAccepted/In press - Nov 10 2017

Keywords

  • Adaptive systems
  • adaptive transmission
  • bit loading
  • Light emitting diodes
  • MIMO
  • MIMO mode switching
  • Modulation
  • OFDM
  • Receivers
  • Signal to noise ratio
  • Visible light communication

ASJC Scopus subject areas

  • Computer Science(all)
  • Materials Science(all)
  • Engineering(all)

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