Artificial Neural Network Nonlinear Equalizer for Coherent Optical OFDM

M, Jarajreh, Giacoumidis, E, Aldaya, I, Le, S.T., Tsokanos, Athanasios, Ghassemlooy, Z. and Doran, N.J. (2015) Artificial Neural Network Nonlinear Equalizer for Coherent Optical OFDM. IEEE Photonics Technology Letters (4). pp. 387-390. ISSN 1041-1135
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We propose a novel low-complexity artificial neural network (ANN)-based nonlinear equalizer (NLE) for coherent optical orthogonal frequency-division multiplexing (CO-OFDM) and compare it with the recent inverse Volterra-series transfer function (IVSTF)-based NLE over up to 1000 km of uncompensated links. Demonstration of ANN-NLE at 80-Gb/s CO-OFDM using 16-quadrature amplitude modulation reveals a Q-factor improvement after 1000-km transmission of 3 and 1 dB with respect to the linear equalization and IVSTF-NLE, respectively.

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