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1. (WO2016061998) METHOD AND DEVICE FOR MONITORING POLARIZATION MODE DISPERSION

Pub. No.:    WO/2016/061998    International Application No.:    PCT/CN2015/074784
Publication Date: Fri Apr 29 01:59:59 CEST 2016 International Filing Date: Sat Mar 21 00:59:59 CET 2015
IPC: H04B 10/075
Applicants: ZTE CORPORATION
中兴通讯股份有限公司
Inventors: ZHONG, Changlong
钟长龙
Title: METHOD AND DEVICE FOR MONITORING POLARIZATION MODE DISPERSION
Abstract:
A method and device for monitoring polarization mode dispersion. The method for monitoring polarization mode dispersion is applied in an adaptive filter and comprises: acquiring a differential group delay (DGD) matrix of electrical signals entering the adaptive filter; obtaining a DGD curve according to the amplitudes of the DGD matrix and the sampling time of the adaptive filter corresponding to each amplitude; acquiring frequency values of the DGD curve according to the distance between adjacent null points of the DGD curve; determining DGD values according to the frequency values of the DGD curve; and determining polarization mode dispersion values of the electrical signals according to the DGD values of multiple different electrical signals. According to the method, the amplitudes of the DGD matrix of the electrical signals entering the adaptive filter are presented in the form of a DGD curve, the frequency values of the DGD curve are acquired according to the distance between the adjacent null points of the DGD curve so that the DGD values are determined, and the polarization mode dispersion values are determined accordingly. The method of calculating the frequency values by using the adjacent null points reduces the calculating complexity of the DGD values and enhances the real-time performance of online monitoring of the polarization mode dispersion values.