Aktuelle Publikationen

Oktober 2024

Compact 3D Scene Representation via Self-Organizing Gaussian Grids

Wieland Morgenstern, Peter Eisert, Anna Hilsmann, Florian Tim Barthel

We introduce a compact scene representation organizing the parameters of 3D Gaussian Splatting (3DGS) into a 2D grid with local homogeneity, ensuring a drastic reduction in storage requirements without compromising visual quality during...


Oktober 2024

Evolution of the 5G New Radio Two-Step Random Access towards 6G Unsourced MAC

Patrick Agostini, Slawomir Stanczak, Johannes Dommel, Zoran Utkovski, Andrea Munari, Federico Clazzer, Jean-Francois Chamberland, Gianluigi Liva, Krishna Narayanan, Yury Polyanskiy

This report explores the future of grant-free random access in next-generation 3GPP wireless standards, focusing on how it aligns with the unsourced multiple access channel (UMAC) model.


Oktober 2024

SPVLoc: Semantic Panoramic Viewport Matching for 6D Camera Localization in Unseen Environments

Niklas Gard, Peter Eisert, Anna Hilsmann

We present SPVLoc, a global indoor localization method that accurately determines the six-dimensional (6D) camera pose of a query image and requires minimal scene-specific prior knowledge and no scene-specific training. Our approach employs a...


Oktober 2024

Experimental Dataset for Developing and Testing ML Models in Optical Communication Systems

Caio Marciano Santos, Colja Schubert, Johannes Fischer, Robert Emmerich, Mohammad Behnam Shariati, Pooyan Safari, Abdelrahmane Moawad

We present here a public dataset for developing and testing ML models. The dataset is developed in a laboratory setting and includes 12672 samples including data points with different modulation formats, symbol rates, distances, WDM channel...


Oktober 2024

Time Adaptive Probabilistic Shaping for Combined Optical/THz Links

In-Ho Baek, Colja Schubert, Ronald Freund, Robert Elschner, Frederik Bart, Fred Meier, David Hellmann, Andreas Maaßen

We investigate the applicability of PAS for outdoor THz wireless links in simulations with weather-dependent loss models. Link performances are evaluated and optimal shaping entropies are determined to adjust error rates to a given FEC threshold....


Oktober 2024

Causes of Outcome Learning: A causal inference-inspired machine learning approach to disentangling common combinations of potential causes of a health outcome

Andreas Rieckmann, Wojciech Samek, Sebastian Lapuschkin, Leila Arras, Piotr Dworzynski, Onyebuchi A. Arah, Naja H. Rod, Claus T. Ekstrom

Nearly all diseases are caused by different combinations of exposures. We present the Causes of Outcome Learning approach (CoOL), which seeks to discover combinations of exposures that lead to an increased risk of a specific outcome in parts of...


Oktober 2024

Impact of Multi-Band Transmission on Optical Signal-to-Noise Ratio Measurements

Robert Emmerich

Fraunhofer HHI researchers investigate the influence error of a fixed noise bandwidth assumption (i.e., 12.5 GHz) on optical signal-to-noise ratio (OSNR) measurements in the context of multi-band transmission and propose a correction method that...


September 2024

Demonstration of a Real-Time Testbed for D-Band Integrated Sensing and Communication

Sven Wittig, Slawomir Stanczak, Michael Peter, Ramez Askar, Rodrigo Hernangómez, Amr Haj-Omar, Karen Vardanyan

The D-band, spanning 110 GHz to 170 GHz, has emerged as a relevant frequency range for future mobile communications and radar sensing applications, particularly in the context of 6G technologies. This demonstration presents a high-bandwidth,...


September 2024

BTSeg: Barlow Twins Regularization for Domain Adaptation in Semantic Segmentation

Johannes Wolf Künzel, Peter Eisert, Anna Hilsmann

We introduce BTSeg, an innovative, semi-supervised training approach enhancing semantic segmentation models in order to effectively handle a range of adverse conditions without requiring the creation of extensive new datasets. BTSeg employs a...


August 2024

Dual-Polarized Sub-THz Channel Measurements in D-Band in an Industrial Environment

Alper Schultze, Wilhelm Keusgen, Michael Peter, Ramez Askar, Taro Eichler, Mathis Schmieder

In this paper, we introduce a novel time domain (TD) correlation based channel sounder that operates in the D-band (110 GHz to 170 GHz) with which we performed dual-polarized sub-THz channel measurements in an industrial environment.


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