Recent publications

December 2022

Comparison of Uni- and Multimodal Interfaces for Spatial Interaction

David Przewozny, Sebastian Bosse, Detlef Runde, Paul Chojecki, Niklas Gard, Niklas Hoerner

Multimodal user interfaces can provide better solutions, as they combine various interaction modalities to enable more flexibility and naturalness in human-machine interactions (HMI). They allow to seamlessly adapt to user and application...


December 2022

Demonstration of 1.75 Gbit/s VCSEL-Based Non-Directed Optical Wireless Communications With OOK and FDE

Malte Hinrichs, Volker Jungnickel, Martin Schubert, Wen Xu, Ronald Freund, Christoph Kottke, Dominic Schulz, Peter Hellwig, Ronald Böhnke, Giulio Boniello

We evaluate a high power on-off-keying transmitter for non-directed optical wireless communications based on VCSEL-arrays. Error-free transmission after FEC with a net data rate of 1.75 GBit/s is achieved across a distance of 2.5 m with a...


December 2022

Reducing Overhead for Low-Power Optical Wireless Communications

Malte Hinrichs, Volker Jungnickel, Peter Hellwig, Benjamin Poddig

We demonstrate on-off-keying optical wireless transmissions according to the IEEE P802.15.13 PM-PHY, in which we replace 8b10b line-coding by guided and non-guided data scramblers and compensate the remaining high-pass distortions through a...


December 2022

Toward AI-enhanced VLC Systems for Industrial Applications

Wesley Da Silva Costa, Volker Jungnickel, Ronald Freund, Anagnostis Paraskevopoulos, Malte Hinrichs, Higor Camporez, Maria Pontes, Marcelo Segatto, Helder Rocha, Jair Silva

This paper presents optimization and deep learning procedures aiming at increasing power and spectral efficiency of visible light communications systems for two exemplary industrial scenarios. We propose a hybrid multi-objective optimization to...


December 2022

Explaining the Decisions of Convolutional and Recurrent Neural Networks

Wojciech Samek, Klaus-Robert Müller, Leila Arras, Grégoire Montavon, Ahmed Osman

In this chapter we discuss the algorithmic and theoretical underpinnings of layer-wise relevance propagation (LRP), apply the method to a complex model trained for the task of visual question answering (VQA), and demonstrate that it produces...


December 2022

Beyond Explaining: Opportunities and Challenges of XAI-Based Model Improvement

Leander Weber, Wojciech Samek, Alexander Binder, Sebastian Lapuschkin

Explainable Artificial Intelligence (XAI) is an emerging research field bringing transparency to highly complex and opaque machine learning (ML) models. This paper offers a comprehensive overview over techniques that apply XAI practically to...


November 2022

150 GBd PAM-4 Electrical Signal Generation using SiGe-Based Analog Multiplexer Ic

Jonathan Schostak, Volker Jungnickel, Ronald Freund, Tobias Tannert, Markus Grözing, Manfred Berroth, Christian Schmidt, Holger Rücker

Analog Multiplexers in Silicon-Germanium technology allow increasing the analog bandwidth of Digital-to-Analog-Converters and enable faster data transfers. We demonstrated 4-level pulse-amplitude modulation (PAM-4) signal transmission at 150 GBd...


November 2022

New Definitions of Human Lymphoid and Follicular Cell Entities in Lymphatic Tissue by Machine Learning

Patrick Wagner, Klaus-Robert Müller, Wojciech Samek, Frederick Klauschen, Arturo Marban, Nils Strodthoff, Philipp Seegerer, Patrick Wurzel, Sonja Scharf, Hendrik Schäfer, Andreas Loth, Sylvia Hartmann, Martin-Leo Hansmann

Histological sections of the lymphatic system are usually the basis of static (2D) morphological investigations. Here, we performed a dynamic (4D) analysis of human reactive lymphoid tissue using confocal fluorescent laser microscopy in...


November 2022

Towards the Interpretability of Deep Learning Models for Multi-Modal Neuroimaging: Finding Structural Changes of the Ageing Brain

Simon M. Hofmann, Klaus-Robert Müller, Wojciech Samek, Arno Villringer, Sebastian Lapuschkin, Frauke Beyer, Markus Loeffler, A. Veronica Witte, Ole Goltermann

Brain-age (BA) estimates based on deep learning are increasingly used as neuroimaging biomarker for brain health; however, the underlying neural features have remained unclear. We combined ensembles of convolutional neural networks with...


October 2022

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....



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