Recent publications

November 2025

Impact of Dispersion Slope on High-Symbol-Rate Coherent Transceivers

Juan Lautaro Moreno Morrone, Colja Schubert, Carsten Schmidt-Langhorst, Robert Emmerich, Ogulcan Erdogan, Laurenz Ebner

Next generation coherent transceivers are expected to offer capacities of 1600 Gbps per wavelength, potentially requiring single-carrier symbol rates of 240 GBd or more. The analysis of higher order physical layer effects at these elevated symbol...


November 2025

Network data sharing: a governance framework for ensuring data sovereignty and privacy compliance

Angela Mitrovska, Ronald Freund, Johannes Fischer, Mohammad Behnam Shariati, Pooyan Safari, Aydin Jafari

The telecommunications industry is undergoing a paradigm shift toward open, disaggregated, and automated networks, necessitating a secure, regulated, and sovereign approach to telemetry data sharing among stakeholders. This paper introduces a...


November 2025

Ad-hoc hybrid-heterogeneous metropolitan-range quantum key distribution network

Jan Krause, et al., Matthias Goy

This paper presents the development and implementation of a versatile ad-hoc metropolitan-range quantum key distribution (QKD) network. The approach presented integrates various types of physical channels and QKD protocols, and a mix of trusted...


November 2025

Split-Inference Architecture for Device-Centric Radio Sensing in a Networked Robotics Scenario

Mehdi Heshmati, Slawomir Stanczak, Michael Peter, Ramez Askar, Zoran Utkovski, Sven Wittig, Yuzhen Ke, Kenan Turbic

An architecture for neuromorphic device-edge co-inference, with application to radio sensing for environment mapping in networked robotics scenarios. The developed demonstration setup integrates a radar sensor, radar preprocessing unit and...


November 2025

Robust and Efficient Kernel-Based Digital Self-Interference Cancellation Using a Priori Knowledge in Full-Duplex Transceivers

Mohammad Hossein Attar, Slawomir Stanczak, Ramez Askar, Jochen Fink

An enhanced digital self-interference cancellation technique for in-band full-duplex (FD) wireless communications, focusing on overcoming challenges from nonlinear distortions. The method uses a kernelized adaptive projected subgradient method...


November 2025

Sub-THz MIMO Hybrid Beamforming: D-Band Dual-Channel Analog Beamforming Front-Ends Prototyping

Ramez Askar, Thomas Haustein, Michael Peter, Jaehoon Chung, Axel Tessmann, Laurenz John, Jongpil Lee, Mehmet Ahad Yurtoglu, Vitor Carvalho De Almeida, Arnulf Leuther, Kim Woochan, Chulkyu Mun, Yonghak Suh

Design and implementation of novel D-band (sub-THz) dual-channel (MIMO hybrid) beamforming wireless front-ends operating between 150 and 170 GHz. The system utilizes analog beamforming networks with two 16×16 microstrip Rotman lenses and dual...


November 2025

Dual-Beam Planar D-Band Antenna Array: Filtering Patch Antennas and Dielectric Lens

Vitor Carvalho De Almeida, Thomas Haustein, Wilhelm Keusgen, Michael Peter, Ramez Askar, Jaehoon Chung, Laurenz John, Yonghak Suh, Jongpil Lee, Mehmet Ahad Yurtoglu, Arnulf Leuther, Kim Woochan, Chulkyu Mun, Kim Jeongin

A hybrid analog beamforming at D-band is demonstrated by integration between an antenna array and a dielectric lens. The beam is collimated on one plane by the antenna array, and on the other by the elliptical lens profile. The antenna element is...


November 2025

Hardware realization of neuromorphic computing with a 4–port photonic reservoir for modulation format identification

Enes Seker, Colja Schubert, Ronald Freund, Isaac Sackey, Gregor Ronniger, Pooyan Safari, Guillermo von Hünefeld, Rijil Thomas, Stephan Suckow, Max Lemme, David Stahl, Mahdi Kaveh, Johannes Karl Fischer

We make a deep dive into the fabrication and testing of a photonic reservoir with digital readout. The developed neural network was tested for the identification of modulation formats at 32 Gbaud transmission rates, where it achieved a near-100%...


November 2025

15 GHz Independently Controllable Dual-Polarized 2-Bit Reconfigurable Intelligent Surface

Mehmet Ahad Yurtoglu, Wilhelm Keusgen, Michael Peter, Ramez Askar, Mathis Schmieder, Sven Wittig

Experience next-generation reconfigurable intelligent surfaces with a novel dual-polarized 2-bit RIS unit cell offering exceptional 55 dB cross-polarization isolation and 400 MHz bandwidth at 15 GHz. Featuring varactor-loaded bowtie elements and...


November 2025

Intraoperative perfusion assessment by continuous, low-latency hyperspectral light-field imaging: development, methodology, and clinical application

Stefan Kray, Anna Hilsmann, Eric Wisotzky, Andreas Schmid, Moritz Gerlich, Sebastian Apweiler, Thomas Greiner, Werner Kneist

This study presents a hyperspectral light field system for intraoperative tissue oxygen saturation (????????2) analysis and visualization. We present a correlation method for determining SO2 saturation with low computational demands. We...


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