Perturbation-based Compensation with EEPN-free Phase Recovery as Back Propagation

Published 8 May 2026 in physics.optics and eess.SP | (2605.07219v1)

Abstract: We propose a feed-forward perturbation-based method that uses the noisy received signal to compensate for nonlinear distortion, which outperforms the conventional decision-based method and avoids decision feedback. Additionally, combining it with the EEPN-free carrier phase recovery shows additional gain due to a fully symmetrical propagation-backpropagation structure.

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