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Receiver alignment dependence of a GA controlled optical wireless transmitter

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Higgins, Matthew D., Green, Roger, 1951- and Leeson, Mark S., 1963-. (2009) Receiver alignment dependence of a GA controlled optical wireless transmitter. Journal of Optics A: Pure and Applied Optics, Vol.11 (No.7). Article: 075403. ISSN 1464-4258

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Official URL: http://dx.doi.org/10.1088/1464-4258/11/7/075403

Abstract

A genetic algorithm controlled multispot transmitter is demonstrated to be capable of optimizing the received power distribution for single element receivers in fully diffuse mobile indoor optical wireless systems. By dynamically modifying the intensity of individual diffusion spots, the transmitter is capable of compensating for changes in receiver alignment, user movement and surface reflectivity characteristics, with negligible impact to bandwidth and RMS delay spread. The dynamic range, referenced against the peak received power, can be reduced by up to 27% when the room is empty, and up to 26% with user movement and variable receiver alignment. Furthermore, received power perturbation, induced by user movement, is reduced from 10% to 2.5%. This method shows potential for providing a highly adaptable solution of overcoming channel variability whilst also reducing receiver complexity.

Item Type:	Journal Article
Subjects:	Q Science > QA Mathematics T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:	Faculty of Science > Engineering
Library of Congress Subject Headings (LCSH):	Genetic algorithms, Optical communications, Wireless LANs
Journal or Publication Title:	Journal of Optics A: Pure and Applied Optics
Publisher:	Institute of Physics Publishing Ltd.
ISSN:	1464-4258
Date:	July 2009
Volume:	Vol.11
Number:	No.7
Number of Pages:	9
Page Range:	Article: 075403
Identification Number:	10.1088/1464-4258/11/7/075403
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
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URI:	http://wrap.warwick.ac.uk/id/eprint/27721