Different aspects of probabilistic shaping for a multispan optical communication system are
studied. First, a numerical analysis of the additive white Gaussian noise (AWGN) channel …

The deviation of continuous and discrete complex random variables from the traditional
proper and symmetric assumption to a generalized improper and asymmetric …

We introduce and compare typical shaping schemes suitable for optical communications.
The geometrically shaped-quadrature amplitude modulation (GS-QAM) formats are …

Recently, data-driven approaches motivated by modern deep learning have been applied to
optical communications in place of traditional model-based counterparts. The application of …

Template for Papers ECOC 2015 Page 1 Geometrically Shaped 16QAM Outperforming
Probabilistically Shaped 16QAM Zhen Qu and Ivan B. Djordjevic University of Arizona …

We propose universal distribution matchers applicable to any two-dimensional signal
constellation. We experimentally demonstrate that the performance of 32-ary QAM, based on …

In this paper, an unsupervised machine learning method for geometric constellation shaping
is investigated. By embedding a differentiable fiber channel model within two neural …

Considers a series of companies in a supply chain, each of which orders from its immediate
upstream collaborators. Usually, the retailer's orders do not coincide with the actual retail …

Constellation shaping has been widely used in optical communication systems. We review
recent advances in two-dimensional constellation shaping technologies for fiber-optic …

In this paper, we first describe an optimum signal constellation design algorithm, which is
optimum in MMSE-sense, called MMSE-OSCD, for channel capacity achieving source …