EQUALIZING DEVICE FOR COMPENSATING RAPID STATE OF POLARIZATION CHANGES OF AN OPTICAL SIGNAL

摘要

The present invention relates to the technical field of processing, particularly equalizing a digital signal, wherein the equalizing is supported by 2x2 MIMO channel estimation and State of Polarization (SOP) estimation. The invention presents an equalizing device, and optical receiver including said equalizing device, a corresponding method and an optical signal with a frame structure for enabling the method. The equalizing device includes a first 2x2 MIMO equalizer configured to perform a first equalization on the digital signal, supported by a 2x2 MIMO channel estimation of the channel based on the digital signal. Further, the device includes a second 2x2 MIMO equalizer, arranged after the first equalizer and configured to perform a second equalization on the digital signal, supported by a SOP estimation of the optical signal based on the digital signal.