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:
May. 14, 2019
Filed:
Feb. 09, 2015
Telefonaktiebolaget Lm Ericsson (Publ), Stockholm, SE;
Fabio Cavaliere, Pisa, IT;
Marco Secondini, Pisa, IT;
Telefonaktiebolaget LM Ericsson (Publ), Stockholm, SE;
Abstract
A digital signal processing, DSP, unit () for use in a coherent optical receiver for an optical communications network. The DSP unit comprises an adaptive equalizer () and a processing block (). The equalizer () comprises input ports for receiving electrical signals, each corresponding to a different state of polarization of an optical signal received by the coherent optical receiver, and output ports, each connected to a processing branch (). A processing branch comprises a symbol sequence estimator, SSE, () and a carrier phase estimator, CPE, () comprising an input for receiving signal taped from an output of the processing branch. An output of the CPE is connected to a phase adjuster () interconnecting the respective output port of the equalizer and the SSE. The processing block () is connected to an output of the CPE, an output of the processing branch and at least one of the output of the phase adjuster and the outputs of the equalizer.