Aktuelle Publikationen

März 2024

Predictive Handover Optimization

Vahid Rajabi, Slawomir Stanczak, Martin Kasparick, Jochen Fink

Future networks aim for higher data rates through cell densification, leading to frequent handovers and increased signaling overhead for moving user equipment (UE). This paper presents an optimization scheme using predicted channel state...


März 2024

Sparse Aperiodic Optical Phased Arrays on Polymer Integration Platform

Adam Raptakis, Christos Kouloumentas, Norbert Keil, Moritz Kleinert, Hercules Avramopoulos, Panos Groumas, Lefteris Gounaridis, Christos Tsokos, Madeleine Weigel, Efstathios Andrianopoulos, Georgios Lymperakis

Solid-state optical beam-steering utilizing polymer waveguides as edge emitters to form optical phased arrays (OPAs) with aperiodic spacing for operation at 1550 nm is demonstrated for the first time. Power consumption of 1.28 mW/? per channel is...


Februar 2024

Animating NeRFs from Texture Space: A Framework for Pose-Dependent Rendering of Human Performances

Paul Knoll, Peter Eisert, Anna Hilsmann, Wieland Morgenstern

We introduce a novel NeRF-based framework for pose-dependent rendering of human performances where the radiance field is warped around an SMPL body mesh, thereby creating a new surface-aligned representation. Our representation can be animated...


Februar 2024

Polymer Waveguide Sensor Based on Evanescent Bragg Grating for Lab-on-a-Chip Applications

Zhenyu Zhang, Wolfgang Schade, Martin Angelmahr, Ahmad Abdalwareth, Günter Flachenecker

This work integrates an evanescent Bragg grating sensor into a polymer waveguide with microchannels. The sensor, built with epoxide-based polymers, is characterized through chemical applications. Temperature sensitivity is demonstrated (-47.75...


Februar 2024

Little or No Equalization is Needed in Energy-Efficient Sub-THz Mobile Access

Lorenzo Miretti, Slawomir Stanczak, Wilhelm Keusgen, Michael Peter, Giuseppe Caire, Taro Eichler, Thomas Kühne, Alper Schultze

We validate experimentally the claim that, in sub-THz mobile access networks, single-carrier or low-number-of-subcarriers modulations are very attractive competitors to the dramatically more complex and energy-inefficient traditional...


Februar 2024

Multispectral Stereo-Image Fusion for 3D Hyperspectral Scene Reconstruction

Eric Wisotzky, Peter Eisert, Anna Hilsmann, Jost Triller

We present a novel approach combining two calibrated multispectral real-time capable snapshot cameras, covering different spectral ranges, into a stereo-system. Therefore, a hyperspectral data-cube can be continuously captured. The combined use...


Februar 2024

Towards Better Morphed Face Images Without Ghosting Artifacts

Clemens Peter Seibold, Anna Hilsmann

We propose a method for automatic prevention of ghosting artifacts based on a pixel-wise alignment during morph generation. We evaluate our proposed method on state-of-the-art detectors and show that our morphs are harder to detect, particularly,...


Februar 2024

Generative Texture Super-Resolution via Differential Rendering

Milena Teresa Bagdasarian, Peter Eisert, Anna Hilsmann

We propose a generative deep learning network for texture map super-resolution using a differentiable renderer and calibrated reference images. Combining a super-resolution generative adversarial network (GAN) with differentiable rendering, we...


Februar 2024

Efficient and Accurate Hyperspectral Image Demosaicing with Neural Network Architectures

Eric Wisotzky, Peter Eisert, Anna Hilsmann, Thomas Wittenberg, Lara Wallburg, Stefan Göb

This study investigates the effectiveness of neural network architectures in hyperspectral image demosaicing. We introduce a range of network models and modifications, and compare them with classical interpolation methods and existing reference...


Februar 2024

Multi-View Inversion for 3D-aware Generative Adversarial Networks

Florian Tim Barthel, Peter Eisert, Anna Hilsmann

Our method builds on existing state-of-the-art 3D GAN inversion techniques to allow for consistent and simultaneous inversion of multiple views of the same subject. We employ a multi-latent extension to handle inconsistencies present in dynamic...


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