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Proceedings Paper

Optical wireless test-bed system using a multiple source transmitter and a segmented receiver to achieve signal tracking
Author(s): Farivar Parand; Grahame E. Faulkner; Dominic C. O'Brien; David J. Edwards
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Paper Abstract

With ever increasing requirements for bandwidth in communications and the trend towards the use of wireless technologies for increased mobility and convenience, greater interest is being directed towards optical wireless as a potential alternative to radio for some applications. The use of a transmitting antenna consisting of more than one optical source can mitigate some of the disadvantages of both line-of-sight and diffuse systems. Each source illuminates a coverage cell, providing greater coverage area than a line-of-sight system and no requirement for pointing, whilst also retaining the potential for higher bandwidths than a diffuse system. The use of a segmented receiver, on the other hand, results in a reduced photodiode capacitance penalty and, due to the possibility of signal processing on the multiple received signals, the potential for improved gain. In this paper we present a test-bed system that incorporates features of both the diffuse and line-of-sight architectures by employing multi-element transmitter and receiver structures. We demonstrate that the combination of such a transmitter and receiver, in conjunction with some focusing optics can provide information about direction of signal arrival, allowing tracking of the optical signal.

Paper Details

Date Published: 27 November 2001
PDF: 10 pages
Proc. SPIE 4530, Optical Wireless Communications IV, (27 November 2001); doi: 10.1117/12.449803
Show Author Affiliations
Farivar Parand, Univ. of Oxford (United Kingdom)
Grahame E. Faulkner, Univ. of Oxford (United Kingdom)
Dominic C. O'Brien, Univ. of Oxford (United Kingdom)
David J. Edwards, Univ. of Oxford (United Kingdom)

Published in SPIE Proceedings Vol. 4530:
Optical Wireless Communications IV
Eric J. Korevaar, Editor(s)

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