Impact of light reflection on indoor wireless optical CDMA systems

Jiang Liu*, Zhenni Pan, Wasinee Noonpakdee, Shigeru Shimamoto

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


We present a study on evaluating the effects of multipath dispersion on indoor optical code division multiple access (CDMA) systems over optical wireless communication. The indoor propagation channel model which takes multiple reflecting surfaces into account is addressed. Theoretical analysis of the pulse response of direct light and reflected light is given. The bit error rate (BER) of this system is analyzed considering reflected light, background light, avalanche photo-diode noise, thermal noise, and multi-user interference. The results prove that the BER of the system is influenced by reflected light and that the effect of reflected light is related to room size and receiver position. With an increase in the number of users, the effect of reflected light becomes stronger and is a significant source of inter-symbol interference. It becomes clear that when optical CDMA is used in an indoor optical wireless system, the effect of reflected light is a key issue to be considered.

Original languageEnglish
Article number6392503
Pages (from-to)989-996
Number of pages8
JournalJournal of Optical Communications and Networking
Issue number12
Publication statusPublished - 2012


  • Diffused link
  • Indoor communications
  • Optical CDMA
  • Optical wireless communication
  • Reflecting

ASJC Scopus subject areas

  • Computer Networks and Communications


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