Geometric Constellation Shaping for Phase-noise Channels Using a Differentiable Blind Phase Search

TL;DR

This paper introduces a method for geometric constellation shaping combined with optimized bit labeling, utilizing a differentiable blind phase search to enable end-to-end training of optical coherent transceivers considering digital signal processing.

Contribution

It presents a novel end-to-end training approach for optical transceivers that integrates geometric constellation shaping with a differentiable blind phase search.

Findings

Improved constellation shaping performance for phase-noise channels

Enhanced bit labeling optimization in optical communication systems

Demonstrated feasibility of end-to-end training including digital signal processing

Abstract

We perform geometric constellation shaping with optimized bit labeling using a binary autoencoder including a differential blind phase search (BPS). Our approach enables full end-to-end training of optical coherent transceivers taking into account the digital signal processing.