Markus Rupp
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View article: Analysis of Scalable Electromagnetically-Modeled Anomalous Reflectors Through Ray Tracing and Measurements
Analysis of Scalable Electromagnetically-Modeled Anomalous Reflectors Through Ray Tracing and Measurements Open
In this study, we elaborate on the concept of a scalable anomalous reflector to analyze the angular response, frequency response, and spatial scalability of a designed anomalous reflector across a broad range of angles and frequencies. We …
View article: Deep Learning-based mmWave MIMO Channel Estimation using sub-6 GHz Channel Information: CNN and UNet Approaches
Deep Learning-based mmWave MIMO Channel Estimation using sub-6 GHz Channel Information: CNN and UNet Approaches Open
Future wireless multiple-input multiple-output (MIMO) systems will integrate both sub-6 GHz and millimeter wave (mmWave) frequency bands to meet the growing demands for high data rates. MIMO link establishment typically requires accurate c…
View article: Leveraging Large Reconfigurable Intelligent Surfaces as Anchors for Near-Field Positioning
Leveraging Large Reconfigurable Intelligent Surfaces as Anchors for Near-Field Positioning Open
In this work, we present a recent investigation on leveraging large reconfigurable intelligent surfaces (RIS) as anchors for positioning in wireless communication systems. Unlike existing approaches, we explicitly address the uncertainty a…
View article: PLAIN: Scalable Estimation Architecture for Integrated Sensing and Communication
PLAIN: Scalable Estimation Architecture for Integrated Sensing and Communication Open
Integrated sensing and communication (ISAC) is envisioned be to one of the paradigms upon which next-generation mobile networks will be built, extending localization and tracking capabilities, as well as giving birth to environment-aware w…
View article: Safe Online Mobile Network Optimization Through Digital Twin-Enhanced Monte Carlo Tree Search
Safe Online Mobile Network Optimization Through Digital Twin-Enhanced Monte Carlo Tree Search Open
The efficient operation of cellular networks requires precise tuning of configuration parameters such as the antenna downtilt or the transmit power. Data-driven methods, which can integrate feedback from monitoring data, are promising but …
View article: Modeling RIS From Electromagnetic Principles to Communication Systems—Part II: System-Level Simulation, Ray Tracing, and Measurements
Modeling RIS From Electromagnetic Principles to Communication Systems—Part II: System-Level Simulation, Ray Tracing, and Measurements Open
| openaire: EC/H2020/956256/EU//META WIRELESS
View article: Impact of Elevation Angle on Multi-Beam LEO Satellite Communication Systems
Impact of Elevation Angle on Multi-Beam LEO Satellite Communication Systems Open
Compared to well-established geosynchronous equatorial orbit (GEO) satellite networks, low Earth orbit (LEO) satellites bring new challenges to overcome, such as the distortion of the satellite footprint with varying elevation angle. The i…
View article: Cellular Uplink Impairments in Vehicular Repeater Deployments
Cellular Uplink Impairments in Vehicular Repeater Deployments Open
Vehicular repeater systems improve the mobile coverage inside railroad cars by amplifying the signals received by a pick-up antenna on the roof and distributing the amplified signals inside the car. Uplink signals are received accordingly …
View article: LEO Satellite Beam Hopping for Power Consumption Minimization at Different Elevation Angles
LEO Satellite Beam Hopping for Power Consumption Minimization at Different Elevation Angles Open
Low Earth orbit (LEO) satellite communication promises to bridge the digital divide. As satellite payload is limited, methods such as beam hopping techniques are necessary to ensure that the scarce resources are used efficiently. Current l…
View article: Modeling RIS From Electromagnetic Principles to Communication Systems—Part I: Synthesis and Characterization of a Scalable Anomalous Reflector
Modeling RIS From Electromagnetic Principles to Communication Systems—Part I: Synthesis and Characterization of a Scalable Anomalous Reflector Open
| openaire: EC/H2020/956256/EU//META WIRELESS
View article: Beam-Domain-Based Pilot Assignment for Energy Efficient Cell-Free Massive MIMO
Beam-Domain-Based Pilot Assignment for Energy Efficient Cell-Free Massive MIMO Open
In this letter, an efficient beam-domain-based pilot assignment scheme is proposed to mitigate the pilot contamination caused by pilot reuse in cell-free massive multiple-input multiple-output systems. By exploiting the information provide…
View article: Optimizing Propagation Channels Using Static Scatterers: Modeling and Ray-Tracing Simulations
Optimizing Propagation Channels Using Static Scatterers: Modeling and Ray-Tracing Simulations Open
Publisher Copyright: © 2024 IEEE.
View article: Accelerated Deep Reinforcement Learning for Uplink Power Control in a Dynamic Cell-Free Massive MIMO Network
Accelerated Deep Reinforcement Learning for Uplink Power Control in a Dynamic Cell-Free Massive MIMO Network Open
We investigate the deep reinforcement learning (DRL) framework for uplink power control in a cell-free massive multiple-input, multiple-output (MIMO) network. Although DRL does not require prior sets of training data as opposed to supervis…
View article: Modeling RIS from Electromagnetic Principles to Communication Systems--Part II: System-Level Simulation, Ray Tracing, and Measurement
Modeling RIS from Electromagnetic Principles to Communication Systems--Part II: System-Level Simulation, Ray Tracing, and Measurement Open
In this paper, we systematically study the electromagnetic (EM) and communication aspects of an RIS through EM simulations, system-level and ray-tracing simulations, and finally measurements. We simulate a nearly perfect, lossless RIS, and…
View article: Modeling RIS from Electromagnetic Principles to Communication Systems--Part I: Synthesis and Characterization of a Scalable Anomalous Reflector
Modeling RIS from Electromagnetic Principles to Communication Systems--Part I: Synthesis and Characterization of a Scalable Anomalous Reflector Open
This work aims to build connections between the electromagnetic and communication aspects of Reconfigurable Intelligent Surfaces (RIS) by proposing a methodology to combine outputs from electromagnetic RIS design into an RIS-tailored syste…
View article: Improving Propagation Channels With Static Scatterers
Improving Propagation Channels With Static Scatterers Open
Publisher Copyright: © 2002-2011 IEEE. | openaire: EC/H2020/956256/EU//META WIRELESS
View article: Improving Propagation Channels with Static Scatterers
Improving Propagation Channels with Static Scatterers Open
This study explores the potential enhancement of radio signal propagation in intricate environments through the deployment of basic resonant dipole scatterers. We employ the MATLAB ray tracer algorithm to examine the impact of dipolar scat…
View article: Key technologies for wireless network digital twin towards smart railways
Key technologies for wireless network digital twin towards smart railways Open
An emerging railway technology called smart railway promises to deliver higher transportation efficiency, enhanced comfort in services, and greater eco-friendliness. The smart railway is expected to integrate fifth-generation mobile commun…
View article: A Differentiable Throughput Model for Load-Aware Cellular Network Optimization Through Gradient Descent
A Differentiable Throughput Model for Load-Aware Cellular Network Optimization Through Gradient Descent Open
The efficient operation of cellular networks requires careful tuning of configuration parameters, such as the transmit power or antenna tilts, to adequately balance interference while providing the necessary capacity to the connected UEs. …
View article: Self-Supervised Learning for Wireless Localization
Self-Supervised Learning for Wireless Localization Open
In this chapter, we provide an overview of several data-driven techniques for wireless localization. We initially discuss shallow dimensionality reduction (DR) approaches and investigate a supervised learning method. Subsequently, we trans…
View article: Self-Supervised and Invariant Representations for Wireless Localization
Self-Supervised and Invariant Representations for Wireless Localization Open
In this work, we present a wireless localization method that operates on self-supervised and unlabeled channel estimates. Our self-supervising method learns general-purpose channel features robust to fading and system impairments. Learned …
View article: Unbiased Benchmarking in Mobile Networks: The Role of Sampling and Stratification
Unbiased Benchmarking in Mobile Networks: The Role of Sampling and Stratification Open
Cellular operators tightly monitor their networks to keep up with the market demand and frequently benchmark their performance against competitors. Typical benchmarking tests compare key performance indicators, quality of service, and qual…
View article: Identification of RIS-Assisted Paths for Wireless Integrated Sensing and Communication
Identification of RIS-Assisted Paths for Wireless Integrated Sensing and Communication Open
Distinguishing between reconfigurable intelligent surface (RIS) assisted paths and non-line-of-sight (NLOS) paths is a fundamental problem for RIS-assisted integrated sensing and communication. In this work, we propose a pattern alternatio…
View article: Contents
Contents Open
Implementation of