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.:
Date of Patent:
Oct. 20, 2009
Filed:
Mar. 03, 2006
Applicants:
Kuang Tsan Wu, Kanata, CA;
Han Sun, Nepean, CA;
Kim B. Roberts, Nepean, CA;
Ruibin Jin, Ottawa, CA;
James Harley, Nepean, CA;
Inventors:
Kuang Tsan Wu, Kanata, CA;
Han Sun, Nepean, CA;
Kim B. Roberts, Nepean, CA;
Ruibin Jin, Ottawa, CA;
James Harley, Nepean, CA;
Assignee:
Nortel Networks Limited, St. Laurent, Quebec, CA;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H04B 10/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method of carrier recovery from a high speed optical signal received through an optical communications network. A stream of multi-bit digital samples of the optical signal is processed to generate a multi-bit estimate X'(n) of each one of a plurality of transmitted symbols. A phase of each symbol estimate X′(n) is rotated, and a respective symbol phase error Δφ(n) of the rotated symbol estimate determined.