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. 28, 2017
Filed:
Sep. 19, 2013
Nec Corporation, Minato-ku, Tokyo, JP;
Wakako Yasuda, Tokyo, JP;
Junichi Abe, Tokyo, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
A nonlinear compensation unit () includes a first compensation unit () and a second compensation unit (). The first compensation unit () compensates for each of two polarization signals Eand Eso as to cancel a first amount of phase rotation which is the amount of phase rotation calculated based on the signal strength of the two polarization signals Eand E. The second compensation unit () compensates for each of the two polarization signals Eand Eso as to cancel a second amount of phase rotation which is the amount of phase rotation calculated based on the perturbative component of the two polarization signals Eand E. The first compensation unit () includes a strength calculation unit (), a first filter unit (), and a first phase modulation unit (). The second compensation unit () includes a perturbative component calculation unit (), a second filter unit (), a second phase modulation unit (), and a third phase modulation unit ().