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:
Aug. 23, 2016
Filed:
Mar. 02, 2012
Roberto Magri, Parma, IT;
Raffaele Corsini, Milan, IT;
Ernesto Ciaramella, Rome, IT;
Emma Matarazzo, Avellion, IT;
Andrea Peracchi, Salsomaggiore Terme, IT;
Roberto Magri, Parma, IT;
Raffaele Corsini, Milan, IT;
Ernesto Ciaramella, Rome, IT;
Emma Matarazzo, Avellion, IT;
Andrea Peracchi, Salsomaggiore Terme, IT;
TELEFONAKTIEBOLAGET L M ERICSSON (PUBL), Stockholm, SE;
Abstract
Chromatic dispersion (CD) processing apparatus comprises an equalizer loop comprising: a frequency domain equalizer (FDE) arranged to receive samples of an electrical representation of an optical communications signal having CD and to apply CD compensation to the samples, to form dispersion corrected samples having a residual CD value; a time domain equalizer arranged to receive the corrected samples and to generate a representation of a channel linear transfer function of the signal from the corrected samples, to generate and transmit a monitoring signal comprising said representation; optical performance monitoring apparatus arranged to receive the monitoring signal and to estimate the residual CD value; and a processor arranged to receive the estimated residual value and to compare it to a threshold value and to generate and transmit to the FDE an estimation signal comprising the estimated value unless it is less than the threshold.