[1] [1] LIU Y, ZHANG Y, PENG Y, et al. Equalization of chromatic diepersion using Winner filter for coherent optical receivers[J]. IEEE Photonics Technology Letters, 2016, 28(10): 1092-1095.

[3] [3] BOWER P, DEDIC I. High speed converts and DSP for 100G and beyond[J]. Optical Fiber Technology, 2011, 17(5): 464-471.

[4] [4] DAVIS C C, MURPHY T E. Fiber-optic communications[J]. IEEE Signal Processing Magazine, 2011,

[6] [6] ERART J L, MANIMEGALAI D, SIBI C S. FBMC-based dispersion compensation using artificial neural network equalization for long reachpassive optical network[J]. International Journal of Wavelets, Multiresolution and Information Processing, 2020, 18(1): 1-20.

[7] [7] SAVORY S J. Digital filters for coherent optical receivers[J]. Optics Express, 2008, 16(2): 804-817.

[10] [10] EGHBALI A, JOHANSSON H, GUSTAFSSON O, et al. Optimal leastsquares FIR digital filters for compensation of chromatic dispersion in digital coherent optical receivers[J]. Journal of Lightwave Technology, 2014, 32(8): 1449-1456.

[11] [11] SAVORY S J. Digital coherent optical receivers: algorithms and subsystems[J]. IEEE Journal of Selected Topics in Quantum Electronics, 2010, 16(5): 1164-1179.

[12] [12] WANG D, JIANG H, LIANG G W, et al. Chromatic dispersion equalization FIR filter design based on discrete least-squares approximation[J]. Optics express, 2021, 29(13) : 20387-20394.

[15] [15] GIL-MOLINA A, PEREZ-RAMIREZ A, RAMIREZ J C, et al. Shift of zero-dispersion wavelength in bent optical fibers[J]. Optics express, 2018, 26(6): 6700-6714.

[16] [16] PITTALA F, SLIM I, MEZGHANI A, et al. Training-aided frequency-domain channel estimation and equalization for single-carrier coherent optical transmission systems[J]. Journal of Lightwave Technology, 2014, 32(24): 4849-4863.

[20] [20] RIBEIRO V B, OLIVEIRA J C, DINIZ J C, et al. Enhanced digital polarization demultiplexation via CMA step size adaptation for PM-QPSK coherent receivers[C]//OSA. Optical Fiber Communication Conference. California: OSA, 2012: 4-8.