Lattice Precoding for Multi-Span Constellation Shaping

Toshiaki Koike-Akino, David S. Millar, Keisuke Kojima, Kieran Parsons

Abstract: We introduce lattice precoding (LP) for constellation shaping, which takes kurtosis into account at multiple spans to mitigate nonlinear distortion. The proposed method achieves 0.35 b/s/Hz gain for 64QAM shaping in long-haul nonlinear fiber-optic communications.