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:
Dec. 06, 2011
Filed:
Dec. 22, 2006
Young-kai Chen, Berkeley Heights, NJ (US);
Noriaki Kaneda, Westfield, NJ (US);
Ut-va Koc, Bridgewater, NJ (US);
Andreas Bertold Leven, Gillette, NJ (US);
Young-Kai Chen, Berkeley Heights, NJ (US);
Noriaki Kaneda, Westfield, NJ (US);
Ut-Va Koc, Bridgewater, NJ (US);
Andreas Bertold Leven, Gillette, NJ (US);
Alcatel Lucent, Paris, FR;
Abstract
A method for determining symbols PSK modulated on an optical carrier includes interfering a first polarization component of the modulated optical carrier and a reference optical carrier in a first optical mixer and interfering the first polarization component of the modulated optical carrier and the reference with a different relative phase in a second optical mixer. The method also includes sampling the interfered carriers from the first optical mixer to produce first digital sampled values and sampling the interfered carriers from the second optical mixer to produce second digital sampled values. The first and second digital sampled values of a sampling period form a first complex sampling value thereof. The method also includes offsetting a phase of a complex signal value corresponding to each first complex sampling value to correct for a phase error caused by a frequency offset between the modulated and reference optical carriers.