An Adaptive Diagonal Extended Kalman Filter based on a Residual Decision for RSOP in Coherent Optical Communication System

This paper proposes an adaptive diagonal extended Kalman filter scheme based on a residual decision suitable for tracking and compensating the rotation of the state of polarization (RSOP) by adding a residual decision detector and diagonalizing the covariance matrix. It is shown through the simulation on the 28Gbaud PDM-QPSK coherent optical communication system platform that the proposed scheme has low complexity and great performance of the equalization for ultrafast RSOP.