[3] Armstrong J. OFDM for optical communications ［J］. Journal of Lightwave Technology, 2009, 27(3): 189-203.
[5] Zhu X M, Kumar S. Nonlinear phase noise in coherent optical OFDM transmission systems ［J］. Opt. Expr., 2010, 18(7): 7347-7360.
[6] Sun H, Wu K T, Roberts K. Real-time measurements of a 40 Gb/s coherent system ［J］. Opt. Expr., 2008, 16: 873-879.
[7] Yonenaga K, et al. 100 Gbit/s all-optical OFDM transmission using 4×25 Gbit/s optical duobinary signals with phase-controlled optical sub-carriers ［C］. OFC, 2008, JThA4.
[8] Shieh W, Yang Q, Ma Y. 107 Gb/s coherent optical OFDM transmission over 1000 km SSMF fiber using orthogonal band multiplexing ［J］. Opt. Expr., 2008, 16(9): 6378-6386.
[9] Susmita Adhikari. PDM-OFDM for upgrade scenarios: An investigation of OFDM-induced XPM on 42.8 Gb/s DPSK over SSMF and LEAF ［C］. OSA/OFC/NFOEC, 2010.
[10] Hidenori Takahashi. Highly spectrally efficient DWDM transmission at 7.0 b/s/Hz using 8×65.1 Gb/s coherent PDM-OFDM ［J］. J. of Lightwave Techno., 2010, 28(4): 406-413.
[11] Susmita Adhikari, Sander L. PDM-OFDM for upgrade scenarios: An investigation of OFDM-induced XPM on 42.8 Gb/s DPSK over SSMF and LEAF ［C］. OSA/OFC/NFOEC, 2010.
[12] Shieh W, Bao H, Tang Y. Coherent optical OFDM: theory and design ［J］. Opt. Expr., 2008, 16: 841-859.
[13] Liu X, Buchali Fred. A novel channel estimation method for PDM-OFDM enabling improved tolerance to WDM nonlinearity ［C］. 2009, OSA/OFC/NFOEC.
[14] Yi X W, Shieh W. Phase estimation for coherent optical OFDM ［J］. IEEE Photonics Technology Letters, 2007, 19(12): 919-921.
