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:
Nov. 13, 2012
Filed:
Mar. 10, 2009
Pierluigi Poggiolini, Turin, IT;
Andrea Carena, Carmagnola, IT;
Vittorio Curri, Nomaglio, IT;
Fabrizio Forghieri, Monza, IT;
Pierluigi Poggiolini, Turin, IT;
Andrea Carena, Carmagnola, IT;
Vittorio Curri, Nomaglio, IT;
Fabrizio Forghieri, Monza, IT;
Cisco Technology, Inc., San Jose, CA (US);
Abstract
Various example embodiments are disclosed. According to one example embodiment, a phase error is estimated in a series of digital symbols of a phase-modulated signal, where the signal is subject to a non-linear phase shift error due to transmission of the signal through an optical fiber. A phase correction of an instant digital symbol that succeeds the series of digital symbols is estimated, where the estimated phase correction is based on the estimated phase errors in the series of digital symbols. The estimated phase correction of the instant digital symbol is limited to a maximum absolute value, and the estimated phase correction is applied to the instant digital symbol of the signal.