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Optica Publishing Group
  • Chinese Optics Letters
  • Vol. 17,
  • Issue 3,
  • pp. 030603-
  • (2019)

Polarization de-multiplexing using a modified Kalman filter in CO-OFDM transmissions

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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.

© 2019 Chinese Laser Press

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