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. 03, 2015
Filed:
Jun. 15, 2012
Luca Razzetti, Milan, IT;
Carlo Costantini, Lecco, IT;
Marianna Pepe, Milan, IT;
Andreas Leven, Bietigheim-Bissingen, DE;
Stephan Ten Brink, Stuttgart, DE;
Laurent Schmalen, Stuttgart, DE;
Luca Razzetti, Milan, IT;
Carlo Costantini, Lecco, IT;
Marianna Pepe, Milan, IT;
Andreas Leven, Bietigheim-Bissingen, DE;
Stephan Ten Brink, Stuttgart, DE;
Laurent Schmalen, Stuttgart, DE;
Alcatel Lucent, Boulogne-Billancourt, FR;
Abstract
Proposed is a method of decoding a differentially encoded PSK modulated optical data signal carrying FEC encoded data values. The optical signal is corrected by an estimated phase offset. From the corrected signal, respective likelihood values for the FEC encoded data values are derived, using an estimation algorithm which accounts for a differential encoding rule used for differentially encoding the optical signal. The derived likelihood values are limited to a predetermined range of values. From the limited likelihood values, FEC decoded data values are derived, using an algorithm which accounts for a FEC encoding rule used for FEC encoding the FEC encoded data values.