TR2012-008

Fractionally-Spaced Statistical Equalizer for Fiber Nonlinearity Mitigation in Digital Coherent Optical Systems



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We propose a fractionally-spaced equalizer with trained second-order statistics to deal with nonlinear impairment in coherent optical communications. The proposed 3-tap equalizer improves Q-factor by more than 2 dB for long-haul transmissions of 5,230 km.