Chinese Optics Letters, 2019, 17 (3): 030603, Published Online: Mar. 8, 2019  

Polarization de-multiplexing using a modified Kalman filter in CO-OFDM transmissions Download: 519次

Author Affiliations
1 Key Laboratory of Optical Fiber Sensing and Communications, University of Electronic Science and Technology of China, Chengdu 611731, China
2 School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, China
3 Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710075, China
Abstract
We propose the modified Kalman filter (MKF) using the received signal for observation and constructing an inverse process of the conventional Kalman filter (CKF) for polarization de-multiplexing in coherent optical (CO) orthogonal frequency-division multiplexing (OFDM) transmissions. The MKF can avoid the convergence error problem in CKF without matrix inverse operation and has a faster converging speed and a much larger tolerance to the process and measurement noise covariance, about two orders of magnitude more than those of CKF. We experimentally demonstrate the 12 Gbaud OFDM signal transmission over 480 km standard single-mode fiber. The performance of MKF and CKF outperforms pilot-aided polarization de-multiplexing with better accuracy and nonlinearity tolerance.

Yang Jiang, Xingwen Yi, Shaohua Hu, Xiatao Huang, Wei Tang, Wenjing Zhou, Xinning Huang, Jing Zhang, Kun Qiu. Polarization de-multiplexing using a modified Kalman filter in CO-OFDM transmissions[J]. Chinese Optics Letters, 2019, 17(3): 030603.

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