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:
Jan. 12, 2016
Filed:
Dec. 19, 2011
Arthur James Lowery, Victoria, AU;
Liang Bangyuan Du, Victoria, AU;
Arthur James Lowery, Victoria, AU;
Liang Bangyuan Du, Victoria, AU;
OFIDIUM PTY. LTD., Melbourne, Victoria, AU;
Abstract
An optical signal () is modulated with a transmitted electrical signal comprising an information-bearing component () and a pilot tone () having a predetermined frequency. Transmission of the signal results in distortion, including nonlinear optical transmission impairments. A method of receiving the signal includes detecting the optical signal to produce a received electrical signal (X) comprising a distorted variant of the transmitted electrical signal. The pilot tone is extracted from the received electrical signal using a filtering operation () having a predetermined characteristic, and a compensation signal determined based upon the extracted pilot tone. The compensation signal is applied to the received electrical signal (X) to produce a compensated signal (Y) having reduced distortion. The predetermined characteristic of the filtering operation () is represented by one or more parameters having values selected so as to substantially maximize a measure of quality of the compensated signal.