Multi-dimensional Joint Probabilistic and Geometric Shaping Strategies for Nonlinear Fiber Communications

TL;DR

This paper reviews and improves constellation shaping strategies for high spectral efficiency WDM fiber systems, proposing a new optimization algorithm that outperforms previous methods under constellation size constraints.

Contribution

It introduces a novel optimization algorithm for constellation shaping that is more effective than existing techniques in nonlinear fiber communication systems.

Findings

Proposed optimization algorithm outperforms previous methods

Enhanced spectral efficiency in WDM systems

Addresses limitations of prior constellation shaping techniques

Abstract

Constellation shaping is reviewed and revised for a WDM unrepeated system with high spectral efficiency. It is shown that for a constellation size-constrained system, previous optimization techniques can be highly sub-optimal, and a superior optimization algorithm is proposed.