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Using symmetric electronic dispersion compensation, root-raised-cosine pulse shaping, and DFT block length optimization, the complexity of single-step frequency domain Volterra-based fiber nonlinearity compensation is reduced by a factor of 2.4, for a 3600 km 128 Gbit/s DP 16-QAM link.
By jointly using perturbation-based nonlinear pre-compensation and selective decision-aided perturbation-based nonlinear post-compensation, a reduction in the effective number of summation terms by a factor of about 4 is achieved for a 128 Gb/s dual polarization 16-ary quadrature amplitude modulation signal with essentially no degradation in performance. A transmission distance of 4800 km is achieved...
Pulse shaping for electronic pre-compensation systems using differential phase shift keying modulation is experimentally shown to provide a 1.9 dB increase of the nonlinearity threshold.
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