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Proceedings Paper

Wireless infrared indoor communications: how to combat the multipath distortion
Author(s): Svetla T. Jivkova; Mohsen Kavehrad
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Paper Abstract

12 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 3 dB-channel bandwidth can be extended up to frequencies beyond 2 GHz. 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 18.5 dB.

Paper Details

Date Published: 6 February 2001
PDF: 9 pages
Proc. SPIE 4214, Optical Wireless Communications III, (6 February 2001); doi: 10.1117/12.417508
Show Author Affiliations
Svetla T. Jivkova, The Pennsylvania State Univ. (United States)
Mohsen Kavehrad, The Pennsylvania State Univ. (United States)

Published in SPIE Proceedings Vol. 4214:
Optical Wireless Communications III
Eric J. Korevaar, Editor(s)

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