Optical communications – Optical communication over freee space – Satellite system
Reexamination Certificate
2006-09-12
2006-09-12
Bello, Agustin (Department: 2613)
Optical communications
Optical communication over freee space
Satellite system
C398S121000
Reexamination Certificate
active
07106971
ABSTRACT:
A system and method for optical wireless communication with fading resistance. A delayed diversity approach reduces fading significantly. Data is sent in a set of light signals (also called diverse light signals) which each have a different polarization and/or a different wavelength. The diverse light signals are also temporally different in that they are transmitted in a delayed fashion with respect to one another. In this way, each light signal is carried over a different, uncorrelated “channel” through the atmosphere. At a receiver, original data in each received light signals is temporally adjusted and combined into a single output data signal. The accuracy of each bit in the output data signal is then due to the reception of the combined diverse light signals. In this way, even if fading occurs in one channel (effecting one diverse light signal), a combined output data signal can still be generated at relatively high accuracy from the original data carried in one or more of the other diverse light signals.
REFERENCES:
patent: 4809257 (1989-02-01), Gantenbein et al.
patent: 5515438 (1996-05-01), Bennett et al.
patent: 5557443 (1996-09-01), Nakamura et al.
patent: 5675648 (1997-10-01), Townsend
patent: 5737366 (1998-04-01), Gehlot
patent: 5757912 (1998-05-01), Blow
patent: 5793509 (1998-08-01), Proctor et al.
patent: 5917638 (1999-06-01), Franck et al.
patent: 6043918 (2000-03-01), Bozzay et al.
patent: 6122084 (2000-09-01), Britz et al.
patent: 6137609 (2000-10-01), Scheps
patent: 6278537 (2001-08-01), Miyamori
Fante, “Electromagnetic Beam Propagation in Turbulent Media,”Proceedings of the IEEE, vol. 63, No. 12, Dec. 1975, pp. 1669-1692.
Tatarski, “Wave Propagation in a Turbulent Medium,” Translated from the Russian by R. A. Silverman,Institute of Mathematical Sciences, New York University, Copyright, 1961, pp. v, xi-xiv, and 58-188.
Yura et al., “Optical Scintillation Statistics for IR Ground-To-Space Laser Communication Systems,”Applied Optics, vol. 22, No. 21, Nov. 1, 1983, pp. 3353-3358.
Christopher C. Davis et al., “The Effect of Atmospheric Turbulence on Bit-Error-Rate in an On-Off Keyed Optical Wireless System”; Reprinted from Free-Space Laser Communication and Laser Imaging; Proceedings of SPIE vol. 4489; pp. 126-136, 2002.
Sugianto Trisno et al.; “Delayed diversity for fade resistance in optical wireless communications through turbulent media”; Optical Transmission Systems and Equipment for WDM Networking III, Proc. SPIE 5596, pp. 385-393; 2005.
Sugianto Trisno et al.; “Characterization of time delayed diversity to mitigate fading in atmospheric turbulence channels”; paper to be published in Proceedings of SPIE, presented at SPIE San Diego; 10 pages; Aug. 2005.
Bello Agustin
Sterne Kessler Goldstein & Fox P.L.L.C.
University of Maryland
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