[1] [1] Glesk I, Sokoloff J P, Prucnal P R. Demonstration of all-optical demultiplexing of TDM data at 250 Gbit/s［J］. Electronics Letters, 1994, 30(4): 339-341.

[2] [2] Wang Jian, Zhu Yong, Zhou Hua, et al. Simulation research on strategy for wavelength division multiplexing-based compensating photon polarization in optical fibers［J］. Acta Optica Sinica, 2015, 35(5): 0506003.

[3] [3] Zhang Xuebin, Tang Yi, Cui Lu, et al. Grating optical antenna for spectral wavelength division multiplex visible light communication［J］. Acta Optica Sinica, 2016, 36(2): 0206003.

[4] [4] Zhang Xia, Tian Feng, Zhang Xiaoguang, et al. Study of coherent optical wavelength division multiplexing terabit transmission experiment system based on multi-carrier［J］. Chinese J Lasers, 2014, 41(6): 0605005.

[5] [5] Salsi M, Mardoyan H, Tran P, et al. 155×100 Gbit/s coherent PDM-QPSK transmission over 7200 km［C］. European Conference on Optical Communication, 2009: 1-2.

[6] [6] Agrell E, Karlsson M. Power-efficient modulation formats in coherent transmission systems［J］. Journal of Lightwave Technology, 2009, 27(22): 5115-5126.

[7] [7] Essiambre R J, Mecozzi A. Capacity limits in single mode fiber and scaling for spatial multiplexing［C］. Optical Fiber Communication Conference and Exposition, 2012: 12760867.

[8] [8] Chang Yuxin, Hu Guijun, Bai Song, et al. Research of asymmetric planar waveguide type mode division multiplexer/demultiplexer［J］. Chinese J Lasers, 2014, 41(12): 1205004.

[9] [9] Ryf R, Randel S, Gnauck A H, et al. Mode-division multiplexing over 96 km of few-mode fiber using coherent 6×6 MIMO processing［J］. Journal of Lightwave Technology, 2012, 30(4): 521-531.

[10] [10] Xie Yiwei, Fu Songnian, Zhang Hailiang, et al. Design and optimization of mode differential group delay for few-mode fiber［J］. Acta Optica Sinica, 2013, 33(9): 0906010.

[11] [11] Fang Yan, Hu Guijun, Gong Caili, et al. Mode demultiplexing based on cascaded independent component analysis for mode division multiplexing system with high mode group delay［J］. Chinese J Lasers, 2016, 43(8): 0806001.

[12] [12] Yao Shuchang, Fu Songnian, Zhang Minming, et al. Demodulation and multi-input multi-output equalization for mode division multiplexing system using a novel few-mode fiber［J］. Acta Physica Sinica, 2013, 62(14): 144215.

[13] [13] Xiang X, Li Y, Tu C, et al. Performance comparison of DA-TDE and CMA for MIMO equalization in multimode multiplexing systems［C］. 14th International Conference on Optical Communications and Networks, 2015: 15382376.

[14] [14] Zhao H Y, Zhang L J, Liu B, et al. MIMO signal processing for mode division multiplexing with RLSCMA algorithm［C］. 13th International Conference on Optical Communications and Networks, 2014: 14822935.

[15] [15] Guan X N, Liu B, Zhang L J, et al. A training-aided MIMO equalization based on matrix transformation in the space division multiplexed fiber-optic transmission system［C］. SPIE, 2016, 10158: 101580O.

[16] [16] Tu C R, Li Y, Du W T, et al. Adaptive blind equalization algorithm using a decision feedback recurrent neural network in mode-division multiplex systems［C］. OptoElectronics and Communication Conference and Australian Conference on Optical Fibre Technology, 2014: 14579724.

[17] [17] Zhang X, Li Y, Du W T, et al. Compensation of mode coupling of mode-division multiplexing transmission system with MIMO CMA［C］. Asia Communications and Photonics Conference, 2013: AW3E.1.

[18] [18] Shynk J J. Frequency-domain and multirate adaptive filtering［J］. IEEE Signal Processing Magazine, 1992, 9(1): 14-37.

[19] [19] Lee J C, Un C K. Performance analysis of frequency-domain block LMS adaptive digital filters［J］. IEEE Transactions on Circuits & Systems, 1989, 36(2): 173-189.

[20] [20] Viterbi A. Nonlinear estimation of PSK-modulated carrier phase with application to burst digital transmission［J］. IEEE Transactions on Information Theory, 1983, 29(4): 543-551.

[21] [21] Yan L, Hu G J. A fast and efficient frequency-domain-independent component analysis for MDM transmission［J］. IEEE Photonics Technology Letters, 2016, 28(16): 1778-1781.

[22] [22] Zhao L, Hu G J, Yan L, et al. Mode demultiplexing based on frequency-domain-independent component analysis［J］. IEEE Photonics Technology Letters, 2015, 27(2): 185-188.

[23] [23] Bai N, Li G F. Adaptive frequency-domain equalization for mode-division multiplexed transmission［J］. IEEE Photonics Technology Letters, 2012, 24(21): 1918-1921.

[24] [24] Faruk M S, Kikuchi K. Adaptive frequency-domain equalization in digital coherent optical receivers［J］. Optics Express, 2011, 19(13): 12789-12798.

[25] [25] Mansour D, Gray A. Unconstrained frequency-domain adaptive filter［J］. IEEE Transactions on Acoustics, Speech & Signal Processing, 1982, 30(5): 726-734.

[26] [26] Spinnler B. Equalizer design and complexity for digital coherent receivers［J］. IEEE Journal of Selected Topics in Quantum Electronics, 2010, 16(5): 1180-1192.