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cs.IT2025
An Extension of Enumerative Sphere Shaping for Arbitrary Channel Input Distributions
Frederik Ritter, Andrej Rode, Laurent Schmalen
A non-uniform channel input distribution is key for achieving the capacity of arbitrary channels. However, message bits are generally assumed to follow a uniform distribution which…
cs.IT2025
Removal of Small Weight Stopping Sets for Asynchronous Unsourced Multiple Access
Frederik Ritter, Jonathan Mandelbaum, Alexander Fengler +2
In this paper, we analyze the formation of small stopping sets in joint factor graphs describing a frame-asynchronous two-user transmission. Furthermore, we propose an algorithm to…
cs.IT2024
Introducing RSESS: An Open Source Enumerative Sphere Shaping Implementation Coded in Rust
Frederik Ritter, Andrej Rode, Laurent Schmalen
In this work, we present an open-source implementation of the enumerative sphere shaping (ESS) algorithm used for probabilistic constellation shaping (PCS). PCS aims at closing the…