Joint blind equalization of PDL and RSOP using extended Kalman filter algorithm in stokes vector direct detection system

A joint blind equalization algorithm is proposed for compensating polarization-dependent loss (PDL) and random state-of-polarization (RSOP) rotation in a Stokes vector direct detection (SV-DD) system based on a time domain extended Kalman filter (EKF) algorithm. The numerical results confirm that the algorithm has a good performance which can track fast random SOP rotation up to 1.5Mrad/s even when 3dB PDL before and after fiber link is present for high-order modulation format.

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