In order to deal with the increasing number of mobile devices and with their demand for
Internet services, particularly social media platforms, streaming video, and online gaming …

Probabilistic sha** based on constant composition distribution matching (CCDM) has
received considerable attention as a way to increase the capacity of fiber optical …

Sha** modulation formats in multi-dimensional (MD) space is an effective approach to
harvest spectral efficiency gains in both the additive white Gaussian noise (AWGN) channel …

Autoencoder-based geometric sha** is proposed that includes optimizing bit map**s.
Up to 0.2 bits/QAM symbol gain in GMI is achieved for a variety of data rates and in the …

GMI-based end-to-end learning is shown to be highly nonconvex. We apply gradient
descent initialized with Gray-labeled APSK constellations directly to the constellation …

In this paper, we provide a systematic comparison of distribution matching (DM) and sphere
sha** (SpSh) algorithms for short blocklength probabilistic amplitude sha**. For …

In this paper, a new four-dimensional 64-ary polarization ring switching (4D-64PRS)
modulation format with a spectral efficiency of 6 bit/4D-sym is introduced. The format is …

We propose a new four-dimensional orthant-symmetric 128-ary modulation format (4D-
OS128) with a spectral efficiency of 7 bit/4D-sym. The proposed format fills the gap between …

Ultrawide-bandwidth optical amplification over almost 90 nm, covering the C+ L bands, is
described. Complemented by system-tailored geometrical constellation sha** and …

Coherent optical systems for short-reach links have seen a boost in their popularity with the
standardization of 400ZR. These systems need to be cost and power-efficient, while co** …