725 citations · 3k across the 227 of their papers we have counts for
242 papers
Revolutionizing 6G Wireless Networks with RISs: Enhancements in Sensing and Communications
Jiguang He, Yuwen Cao, Charles Vanwynsberghe +5
Reconfigurable intelligent surfaces (RISs) have emerged as one of the most promising technologies for the next-generation wireless networks, offering advantages such as cost effici…
An Operational Leakage Metric for Eavesdropping in Joint Sensing and Communications Systems
Nanchi Su, Xiaoye Jing, Fan Liu +3
In upcoming integrated sensing and communications (ISAC) systems, security depends on whether an eavesdropper (Eve) can recover data symbols or infer sensing information from a com…
Cross-View Vision-Aided Proactive BS Selection and Beam Prediction for mmWave V2I Communications
Zijiao Hu, Haiyao Yu, Gaoyang Pang +6
This paper investigates environmental-sensing-aided proactive base station (BS) selection and beam prediction for millimeter-wave (mmWave) vehicle-to-infrastructure (V2I) wireless…
Active Sensing for RIS-Aided Tracking and Power Control: A Hybrid Neuroevolution and Supervised Learning Approach
George Stamatelis, Hui Chen, Henk Henk Wymeersch +1
This paper studies energy efficient tracking of power-limited mobile users with the assistance of a Reconfigurable Intelligent Surface (RIS). Since localization pilot transmissions…
Uplink Channel Estimation for Multi-User MISO Systems Assisted by a Fluid Reconfigurable Intelligent Surface
Amarilton L. Magalhães, André L. F. de Almeida, George C. Alexandropoulos
Fluid reconfigurable intelligent surfaces (FRISs) have recently emerged as a promising paradigm for wireless communications, wherein the reflecting elements can dynamically select…
Control Plane for Reconfigurable Intelligent Surfaces
Fabio Saggese, Victor Croisfelt, Kyriakos Stylianopoulos +2
Research on reconfigurable intelligent surfaces (RISs) has predominantly focused on purely physical (PHY)-layer aspects, particularly, on how signals are dynamically shaped by a co…
Trajectory-Aware Multi-RIS Activation and Configuration: A Riemannian Diffusion Method
Kaining Wang, Bo Yang, Yusheng Lei +8
Reconfigurable intelligent surfaces (RISs) offer a low-cost, energy-efficient means for enhancing wireless coverage. Yet, their inherently programmable reflections may unintentiona…
Interference Propagation Analysis for Large-Scale Multi-RIS-Empowered Wireless Communications:An Epidemiological Perspective
Kaining Wang, Xueyao Zhang, Bo Yang +8
Reconfigurable intelligent surfaces (RISs) have gained significant attention in recent years due to their ability to control the reflection of radio-frequency signals and reshape t…
Mismatch Analysis and Cooperative Calibration of Array Beam Patterns for ISAC Systems
Hui Chen, Mengting Li, Alireza Pourafzal +6
Integrated sensing and communication (ISAC) is a key technology for enabling a wide range of applications in future wireless systems. However, the sensing performance is often degr…
SORIS: A Self-Organized Reconfigurable Intelligent Surface Architecture for Wireless Communications
Evangelos Koutsonas, Alexandros-Apostolos A. Boulogeorgos, Stylianos E. Trevlakis +3
In this paper, a new reconfigurable intelligent surface (RIS) hardware architecture, called self-organized RIS (SORIS), is proposed. The architecture incorporates a microcontroller…
Decentralized Cooperative Beamforming for BDRIS-Assisted Cell-Free MIMO OFDM Systems
Konstantinos D. Katsanos, George C. Alexandropoulos
In this paper, a wideband cell-free multi-stream multi-user Multiple-Input Multiple-Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) system is considered operating w…
Robust Consensus-Based Distributed Beamforming for Wideband Cell-free Multi-RIS MISO Systems
Konstantinos D. Katsanos, George C. Alexandropoulos
The cell-free networking paradigm constitutes a revolutionary architecture for future generations of wireless networks, which has been recently considered in synergy with Reconfigu…
Over-the-Air Goal-Oriented Communications
Kyriakos Stylianopoulos, Paolo Di Lorenzo, George C. Alexandropoulos
Goal-oriented communications offer an attractive alternative to the Shannon-based communication paradigm, where the data is never reconstructed at the Receiver (RX) side. Rather, f…
Over-the-Air Semantic Alignment with Stacked Intelligent Metasurfaces
Mario Edoardo Pandolfo, Kyriakos Stylianopoulos, George C. Alexandropoulos +1
Semantic communication systems aim to transmit task-relevant information between devices capable of artificial intelligence, but their performance can degrade when heterogeneous tr…
RIS-Aided Localization and Sensing
Dimitris Kompostiotis, Dimitris Vordonis, Konstantinos D. Katsanos +3
High-precision localization and environmental sensing are essential for a new wave of applications, ranging from industrial automation and autonomous systems to augmented reality a…
Sensing-Aided Near-Field Beam Tracking
Panagiotis Gavriilidis, George C. Alexandropoulos
The interplay between large antenna apertures and high carrier frequencies in future wireless systems gives rise to near-field communications, where the curvature of spherical wave…
Near-Field Multipath MIMO Channels: Modeling Reflectors and Exploiting NLOS Paths
Mohamadreza Delbari, George C. Alexandropoulos, Robert Schober +2
Near-field (NF) communications is receiving renewed interest in the context of multiple-input multiple-output (MIMO) systems involving large physical apertures with respect to the…
Filtering Jump Markov Systems with Partially Known Dynamics: A Model-Based Deep Learning Approach
George Stamatelis, George C. Alexandropoulos
This paper presents the Jump Markov Filtering Network (JMFNet), a novel model-based deep learning framework for real-time state-state estimation in jump Markov systems with unknown…
MIMO Communications with 1-bit RIS: Asymptotic Analysis and Over-the-Air Channel Diagonalization
Panagiotis Gavriilidis, Kyriakos Stylianopoulos, George C. Alexandropoulos
This paper presents an asymptotic analysis of Multiple-Input Multiple-Output (MIMO) systems assisted by a 1-bit Reconfigurable Intelligent Surface (RIS) under Ricean fading conditi…
Performance Analysis of One- and Two-way DV-QKD with MIMO FSO Communication Systems
Sushil Kumar, Soumya P. Dash, George C. Alexandropoulos
This paper considers a multiple-input multiple-output (MIMO) wireless system wherein two legitimate users attempt to exchange secret keys over free-space optical (FSO) channels. No…
3D Gaussian Radiation Field Modeling for Integrated RIS-FAS Systems: Analysis and Optimization
Kaining Wang, Bo Yang, Yusheng Lei +7
The integration of reconfigurable intelligent surfaces (RIS) and fluid antenna systems (FAS) has attracted considerable attention due to its tremendous potential in enhancing wirel…
AI-Aided Annealed Langevin Dynamics for Rapid Optimization of Programmable Channels
Tomer Shaked, Philipp del Hougne, George C. Alexandropoulos +1
Emerging technologies such as Reconfigurable Intelligent Surfaces (RIS) make it possible to optimize some parameters of wireless channels. Conventional approaches require relating…
Joint Optimization of Cooperation Efficiency and Communication Covertness for Target Detection with AUVs
Xueyao Zhang, Bo Yang, Zhiwen Yu +10
This paper investigates underwater cooperative target detection using autonomous underwater vehicles (AUVs), with a focus on the critical trade-off between cooperation efficiency a…
Leaky Wave Antennas for Next Generation Wireless Applications in sub-THz Frequencies: Current Status and Research Challenges
Natalie Lang, Atsutse K. Kludze, Nir Shlezinger +4
The ever-growing demand for ultra-high data rates, massive connectivity, and joint communication-sensing capabilities in future wireless networks is driving research into sub-terah…