Multiple access resource allocation in visible light communication systems

Dima Bykhovsky, Shlomi Arnon

Research output: Contribution to journalArticlepeer-review

133 Scopus citations

Abstract

Discrete multi-tone (DMT) modulation is known to be an efficient single-transmitter technique for visible-light communication. However, the use of this technique in a multiple transmitter environment requires effective subcarrier and power allocation design in order to exploit the full potential of spatial multiple-transmitter diversity. Spatial reuse of the subcarriers in the presence of interference and power constraints increases the efficiency of multiple access (MA) DMT communication. In this paper, we propose an algorithm that manages interference-constrained subcarrier reuse between different transmitters and power redistribution between different subcarriers in a heuristic manner. The algorithm simulation shows an improvement in the average bit-rate as compared with a conventional DMT method. Furthermore, the effectiveness of the proposed MA-DMT scheme increases with the number of users.

Original languageEnglish
Article number6747983
Pages (from-to)1594-1600
Number of pages7
JournalJournal of Lightwave Technology
Volume32
Issue number8
DOIs
StatePublished - 15 Apr 2014

Keywords

  • DC-biased optical discrete multi-tone (DCO-DMT)
  • dc-biased optical orthogonal frequency division multiplexing (DCO-OFDM)
  • discrete multi-tone (DMT)
  • free-space optical (FSO) communication
  • interference management
  • optical cell
  • optical network scalability
  • resource allocation
  • visible-light communication (VLC)

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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