6 February 2001 Wireless infrared indoor communications: how to combat the multipath distortion
Author Affiliations +
Proceedings Volume 4214, Optical Wireless Communications III; (2001) https://doi.org/10.1117/12.417508
Event: Information Technologies 2000, 2000, Boston, MA, United States
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.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Svetla T. Jivkova, Svetla T. Jivkova, Mohsen Kavehrad, Mohsen Kavehrad, } "Wireless infrared indoor communications: how to combat the multipath distortion", Proc. SPIE 4214, Optical Wireless Communications III, (6 February 2001); doi: 10.1117/12.417508; https://doi.org/10.1117/12.417508


Back to Top