Spatial multiplexing in optical wireless MIMO communications over indoor environment

Daisuke Takase, Tomoaki Ohtsuki

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


We propose optical wireless multiple-input multipleoutput (OMIMO) communications to achieve high speed transmission with a compact transmitter and receiver. In OMIMO, by using zero forcing (ZF), minimum mean square error (MMSE) or other detection techniques, we can eliminate the interference from the other optical transmit antennas. In this paper, we employ ZF as the detection technique. We analyze the signalto-interference-plus-noise ratio (SINR) and the hit error rate (BER) of the proposed OMIMO with a linear array and a square array of optical transmit and receive antennas, where we employ subcarrier multiplexing (SCM) for each optical transmit antenna. Note that the proposed OMIMO is applicable to other arrangements of optical transmit and receive antennas. We show that the proposed OMIMO system can realize MIMO multiplexing and achieve high speed transmission by correctly aligning the optical transmit and receive antennas and the transmitter semiangle.

Original languageEnglish
Pages (from-to)1364-1370
Number of pages7
JournalIEICE Transactions on Communications
Issue number4
Publication statusPublished - 2006 Apr


  • Intermodulation distortion (IMD)
  • Nonlinearity of LD
  • Optical modulation index (OMI)
  • Optical wireless multiple-input multiple-output (OMIMO)
  • Subcarrier multiplexing (SCM)
  • Zero forcing (ZF)

ASJC Scopus subject areas

  • Software
  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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