公开(公告)号：US10903912B2

公开(公告)日：2021-01-26

申请号：US16872967

申请日：2020-05-12

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Rene Janicek ,  Jeebak Mitra

IPC: H04B10/06 ,  H04B10/61 ,  H04B10/079 ,  H04B10/69

Abstract: The disclosed structures and methods are directed to a method for compensation of linear and nonlinear effects in optical fiber of a coherent optical signal transmitted through an optical link. The method comprises receiving a coherent optical signal having carriers; determining values of intensity vectors for each carrier; determining values of filtered intensity vectors for each carrier by filtering the values of the intensity vectors at frequencies lower than a cut-off frequency of a filter; determining nonlinear compensation coefficients for each carrier based on the filtered intensity vectors; and modifying the digital coherent optical signal based on the nonlinear compensation coefficients.