Patent · US Active

Mitigation of equalization-enhanced phase noise in a coherent optical receiver

US12081273B2 · kind B2 · utility

0Cited by

15References

20Claims

0Family size

Assignee

NOKIA SOLUTIONS AND NETWORKS OY · FI

Inventors

Vahid Aref · Stuttgart, DE
Fred Buchali · Waiblingen, DE
Stenio Magalhaes Ranzini · Stuttgart, DE

Key dates

Filing date	May 31, 2022
Grant date	Sep 3, 2024
Priority date	—
Expiry date	Jul 1, 2042

Classification

Technology area (CPC H)Electricity
CPC primaryH04B10/6165
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

A coherent optical data receiver having a digital signal processor (DSP) capable of mitigating equalization-enhanced phase noise (EEPN). In an example embodiment, the DSP mitigates EEPN by applying individual phase adjustments to different spectral slices of a digital stream carrying CD-compensated digital samples of the received optical data signal. In different embodiments, the individual phase adjustments can be dynamically selected based on symbol decisions taken prior to EEPN mitigation, based on transmitted pilot symbols, and/or using moving averages computed for different spectral slices. Some embodiments are suitable for handling polarization-division-multiplexed optical data signals. Some embodiments are advantageously capable of producing an effective SNR gain of approximately 1 dB.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.