Phase correction in high speed coherent optical communication
US11817909B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 2022 |
| Grant date | Nov 14, 2023 |
| Priority date | — |
| Expiry date | Aug 24, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/035
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method for phase correction, the method may include generating in parallel and by a set of phase error detectors, a set of phase error detection results (PEDRs) related to a set of blocks of digital samples, the digital samples are frequency corrected and represent optical signals conveyed over a coherent optical communication link; wherein the PEDs introduce PED noise that is indifferent to phase errors of the set of the blocks of digital samples; sending, in a sequential manner, the set of PEDRs, to a loop that comprises a loop filter; generating, by the loop, phase difference results, wherein each phase difference result is indicative of a phase difference between a certain PEDR of the PEDRs and a loop filtered PEDR generated by filtering a PEDR that precedes the certain PEDR; and processing, by a phase correction unit, the digital samples and the phase different results, to provide phase corrected digital samples.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.