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:
Apr. 05, 2011
Filed:
Aug. 15, 2007
Applicants:
John Brownlee, Atlanta, GA (US);
Boris Kershteyn, Marietta, GA (US);
Inventors:
John Brownlee, Atlanta, GA (US);
Boris Kershteyn, Marietta, GA (US);
Assignee:
Ciena Corporation, Linthicum, MD (US);
Primary Examiner:
Int. Cl.
CPC ...
H04B 10/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention utilizes field programmable gate arrays (FPGAs) to implement a parallel differential quadrature phase shift keying (DQPSK) precoder and a DQPSK optical transmitter with an automatic realignment process. The present invention can perform DQPSK preceding, modulation, and data stream realignment at any lower rate, and its upper rate is determined by capability in speed and logic resources and external connections of available integrated circuit technology.