Wireless infrared indoor communications: How to combat the multi-path distortion

S. Jivkova, M. Kavehrad

Research output: Contribution to journalConference article

3 Scopus citations

Abstract

Currently, higher and higher transmission speeds are being pursuit for wireless LANs. The present investigation deals with one of the most prospective candidates for high-speed in-house wireless communications, namely, Multi-Spot Diffusing Configuration (MSDC). Since it uses optical medium for data transmission, it possesses inherent potential for achieving very high capacity level. Channel characteristics in MSDC are simulated and the causes for channel distortion are analyzed. Then, conditions for creation of a virtually ideal channel are derived. It is shown that the 3dB-channel bandwidth can be extended up to frequencies beyond 2GHz. The large bandwidth comes at the cost of poor power efficiency. In order to compensate for this, a novel receiver optical front-end design is proposed and its performance is analyzed. Taking advantage of unique properties of holographic optical elements, conventional optical front-end consisting of a concentrator and a filter, is replaced by a single holographic curved mirror. Utilization of such a holographic optical element improves the signal-to-shot noise ratio by up to 18.5dB.

Original languageEnglish (US)
Pages (from-to)162-170
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume4214
DOIs
StatePublished - Jan 1 2001
EventOptical Wireless Communications III - Boston, MA, United States
Duration: Nov 6 2000Nov 7 2000

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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