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Proceedings Paper

Optical wireless communications with low voltage self-powered sensor motes
Author(s): Dominic C. O'Brien; Jing-Jing Liu; Wei Wen Yuan; Grahame E. Faulkner; Steve J. Elston; Steve Collins
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Paper Abstract

Optical wireless channels that use modulated retro-reflectors can provide low-data rate communications to self-powered 'smart-dust' motes. The retro-reflectors are illuminated using a base station that incorporates diffractive beamsteering to direct radiation onto the motes, and these return the radiation to an imaging receiver within the base station. The motes consist of a photodiode to provide power, a novel logarithmic receiver to receive data from the base station, and a modulating retro-reflector to send information from the mote to the base station. Several of the components elements of this system have been implemented and tested. In this paper we report a logarithmic receiver that can be self powered by the source communicating with it, and a retro-reflecting LC modulator component that operates at 30b/s when driven at 0.7V. In addition an overall system model, together with the challenges for future work are presented.

Paper Details

Date Published: 25 September 2007
PDF: 10 pages
Proc. SPIE 6709, Free-Space Laser Communications VII, 67090A (25 September 2007); doi: 10.1117/12.735599
Show Author Affiliations
Dominic C. O'Brien, Univ. of Oxford (United Kingdom)
Jing-Jing Liu, Univ. of Oxford (United Kingdom)
Wei Wen Yuan, Univ. of Oxford (United Kingdom)
Grahame E. Faulkner, Univ. of Oxford (United Kingdom)
Steve J. Elston, Univ. of Oxford (United Kingdom)
Steve Collins, Univ. of Oxford (United Kingdom)

Published in SPIE Proceedings Vol. 6709:
Free-Space Laser Communications VII
Arun K. Majumdar; Christopher C. Davis, Editor(s)

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