Position-based diversity transmission scheme employing optical wireless communication

Wasinee Noonpakdee*, Jiang Liu, Shigeru Shimamoto

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


We propose a position-based diversity transmission scheme for indoor optical wireless communication. In our scheme, the I (in-phase) and Q (Quadrature) signal of QPSK (quaternary phase-shift keying) modulation are transmitted separately to obtain a secure position-based transmission. We analyze probability of error with different mode numbers of the radiation lobe of Lambertian source, and position of the transmitters to attain single or multiple secure area(s). To obtain different secured areas, TDMA (time-division multiple access) with adaptive transmitted power for each time slot is applied. According to analytical results, the signal can be demodulated correctly only in the specific area and high-level security for optical wireless communication systems can then be achieved. In our scheme, the probability that the intruders can get the correct signal is decreased 90%, compared to conventional QPSK.

Original languageEnglish
Article number6018857
Pages (from-to)1071-1078
Number of pages8
JournalIEEE Transactions on Consumer Electronics
Issue number3
Publication statusPublished - 2011 Aug


  • Diversity Transmission
  • IM/DD
  • Indoor Optical Wireless Communication
  • Infrared Communication
  • ModulationScheme

ASJC Scopus subject areas

  • Media Technology
  • Electrical and Electronic Engineering


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