[1] Ghazisaeidi A, Sab O A et al. 25.4-Tb/s transmission over transpacific distances using truncated probabilistically shaped PDM-64QAM[J]. Journal of Lightwave Technology, 36, 1354-1361(2018). http://ieeexplore.ieee.org/document/8253444

[2] Shen S Y, Yan J H, Peng P C et al. Polarization-tracking-free PDM supporting hybrid digital-analog transport for fixed-mobile systems[J]. IEEE Photonics Technology Letters, 31, 54-57(2019).

[3] Chen C, Zhuge Q B, Plant D V. Zero-guard-interval coherent optical OFDM with overlapped frequency-domain CD and PMD equalization[J]. Optics Express, 19, 7451-7467(2011).

[4] Chen C, Zhuge Q, Plant D V. Reduced-guard-interval CO-OFDM with overlapped frequency-domain CD and PMD equalization. [C]∥Optical Fiber Communication Conference/National Fiber Optic Engineers Conference 2011, March 6-10, 2011, Los Angeles, California, USA. Washington, DC: OSA, OWE7(2011).

[5] Zheng Z B, Cui N, Xu H Y et al. Window-split structured frequency domain Kalman equalization scheme for large PMD and ultra-fast RSOP in an optical coherent PDM-QPSK system[J]. Optics Express, 26, 7211-7226(2018).

[6] Kudo R, Kobayashi T, Ishihara K et al. PMD compensation in optical coherent single carrier transmission using frequency-domain equalisation[J]. Electronics Letters, 45, 124-125(2009).

[7] Ishihara K, Kobayashi T, Kudo R et al. Frequency-domain equalization for coherent optical single-carrier transmission systems[J]. IEICE Transactions on Communications, 92, 3736-3743(2009).

[8] Godard D. Self-recovering equalization and carrier tracking in two-dimensional data communication systems[J]. IEEE Transactions on Communications, 28, 1867-1875(1980).

[9] Ready M J, Gooch R P. Blind equalization based on radius directed adaptation. [C]∥International Conference on Acoustics, April 3-6, 1990, Albuquerque, NM, USA. New York: IEEE, 1699-1702(1990).

[10] Yu Z M, Yi X W, Zhang J et al. Modified constant modulus algorithm with polarization demultiplexing in Stokes space in optical coherent receiver[J]. Journal of Lightwave Technology, 31, 3203-3209(2013).

[11] Noe R, Hinz S, Sandel D et al. Crosstalk detection schemes for polarization division multiplex transmission[J]. Journal of Lightwave Technology, 19, 1469-1475(2001). http://ieeexplore.ieee.org/document/956134

[12] Yang Y F, Cao G L, Zhong K P et al. Fast polarization-state tracking scheme based on radius-directed linear Kalman filter[J]. Optics Express, 23, 19673-19680(2015).

[13] Pakala L, Schmauss B. Joint tracking of polarization state and phase noise using adaptive cascaded Kalman filtering[J]. IEEE Photonics Technology Letters, 29, 1297-1300(2017).

[14] Cao G L, Yang Y F, Wang F et al. Extended Kalman based polarization and carrier phase quickly tracking for PDM-16QAM[J]. Acta Optica Sinica, 34, 1206005(2014).

[15] Gordon J P, Kogelnik H. PMD fundamentals: polarization mode dispersion in optical fibers[J]. Proceedings of the National Academy of Sciences of the United States of America, 97, 4541-4550(2000).