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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9906357 B1

PDFFull Text
Date of Patent:
Feb. 27, 2018

Filed:

Dec. 05, 2016

Ofdm frame synchronization for coherent and direct detection in an optical fiber telecommunication system

Applicant:

The Arizona Board of Regents on Behalf of the University of Arizona, Tucson, AZ (US);

Inventors:

Stanley Johnson, Tucson, AZ (US);

Milorad Cvijetic, Tucson, AZ (US);

Assignee:

THE ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA, Tucson, AZ (US);

Attorneys:

Mayer & Williams PC

Stuart H. Mayer

Primary Examiner:

Don N Vo

Int. Cl.
CPC ...
H04L 27/28 (2006.01); H04B 10/00 (2013.01); H04L 7/00 (2006.01); H04B 10/61 (2013.01); H04L 5/00 (2006.01);
U.S. Cl.
CPC ...
H04L 7/0075 (2013.01); H04B 10/613 (2013.01); H04B 10/6161 (2013.01); H04L 5/0007 (2013.01);
Abstract

An optical receiver includes a detector and frame synchronizer. The detector receives an optical OFDM bit stream having a plurality of frames. Each frame has an in-phase and quadrature phase component. Each component has an OFDM symbol-bearing data payload and a synchronization header. The synchronization header includes a single synchronization pulse. The frame synchronizer detects the synchronization header on each phase component. The frame synchronizer includes first and second pairs of digital comparators for each of the in-phase and quadrature phase components. The first and second pairs of digital comparators associated with each phase component establishes different and adjustable threshold windows that is symmetric about a zero amplitude of the synchronization pulse of the respective phase component. Each frame is synchronized when the synchronization pulse respectively associated therewith is detected as having an amplitude extending beyond at least one of the windows established for one of the phase components.

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Quick Actions:

Johnson, Stanley. (2018). Ofdm frame synchronization for coherent and direct detection in an optical fiber telecommunication system (U.S. Patent No. 9906357). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9906357

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