28 citations · 86 across the 38 of their papers we have counts for
46 papers
Unified Evaluation Methodology for AI-Native Integrated Sensing and Communication
Filip Lemic, Andra Blaga, Francesco Devoti +24
Integrated Sensing and Communication (ISAC) couples radio sensing, data transmission, and control actions within a single closed-loop system. When Artificial Intelligence (AI)-driv…
ISAC Privacy: Challenges and Solutions for 6G
Onur Günlü, Stefano Tomasin, João P. Vilela +4
Integrated sensing and communication (ISAC) is a promising feature of future communication networks. While spatial sensing can improve network performance and enable external servi…
Bending beams for 6G near-field communications
Sotiris Droulias, Giorgos Stratidakis, Angeliki Alexiou
Future wireless connectivity is envisioned to accommodate functionalities far beyond broadband data transmission over point-to-point direct links, enabling novel scenarios, such as…
Hierarchical Localization for Integrated Sensing and Communication
Giorgos Stratidakis, Sotiris Droulias, Angeliki Alexiou
Localization is expected to play a significant role in future wireless networks as positioning and situational awareness, navigation and tracking, are integral parts of 6G usage sc…
Reconfigurable Intelligent Surfaces as Spatial Filters
Sotiris Droulias, Giorgos Stratidakis, Emil Björnson +1
The design of Reconfigurable Intelligent Surfaces (RISs) is typically based on treating the RIS as an infinitely large surface that steers incident plane waves toward the desired d…
Near-field orthogonality and cosine beams for near-field space division multiple access in 6G communications and beyond
Sotiris Droulias, Giorgos Stratidakis, Angeliki Alexiou
Spatial division multiple access (SDMA), a powerful method routinely applied in multi-user multiple-input multiple-output (MIMO) communications, relies on the angular orthogonality…
Perceptive, Resilient, and Efficient Networks assisted by Reconfigurable Intelligent Surfaces
Giorgos Stratidakis, Sotiris Droulias, Angeliki Alexiou
Wireless communications are nowadays shifting to higher operation frequencies with the aim to meet the ever-increasing demand for bandwidth. While reconfigurable intelligent surfac…
On the physical layer security capabilities of reconfigurable intelligent surface empowered wireless systems
Alexandros--Apostolos A. Boulogeorgos, Angeliki Alexiou, Angelos Michalas
In this paper, we investigate the physical layer security capabilities of reconfigurable intelligent surface (RIS) empowered wireless systems. In more detail, we consider a general…
Training Terahertz Wireless Systems to Battle I/Q Imbalance
Alexandros-Apostolos A. Boulogeorgos, Angeliki Alexiou
Due to the non-ideality of analog components, transceivers experience high levels of hardware imperfections, like in-phase and quadrature imbalance (IQI), which manifests itself as…
On the Ergodic Secrecy Capacity of Reconfigurable Intelligent Surface Aided Wireless Systems Under Mixture Gamma Fading
Alexandros-Apostolos A. Boulogeorgos, Angeliki Alexiou
This paper presents a quantified assessment of the physical layer security capabilities of reconfigurable intelligent surface (RIS)-aided wireless systems under eavesdropping. Spec…
Analytical characterization of RIS-aided terahertz links in the presence of beam misalignment
Evangelos N. Papasotiriou, Sotiris Droulias, Angeliki Alexiou
The terahertz (THz) frequency band has recently attracted considerable attention in wireless communications as potential candidate for providing the necessary high bandwidth for de…
Throughput analysis of RIS-assisted UAV wireless systems under disorientation and misalignment
Alexandros-Apostolos A. Boulogeorgos, Angeliki Alexiou, Marco Di Renzo
Reconfigurable intelligent surface (RIS)-assisted unmanned areal vehicles (UAV) communications have been identified as a key enabler of a number of next-generation applications. Ho…
Artificial Intelligence Empowered Multiple Access for Ultra Reliable and Low Latency THz Wireless Networks
Alexandros-Apostolos A. Boulogeorgos, Edwin Yaqub, Rachana Desai +5
Terahertz (THz) wireless networks are expected to catalyze the beyond fifth generation (B5G) era. However, due to the directional nature and the line-of-sight demand of THz links,…
Reconfigurable Intelligent Surface: MIMO or radiating sheet?
Sotiris Droulias, Angeliki Alexiou
A Reconfigurable Intelligent Surface (RIS) redirects and possibly modifies the properties of incident waves, with the aim to restore non-line-of-sight communication links. Composed…
Performance Analysis of Multi-Reconfigurable Intelligent Surface-Empowered THz Wireless Systems
Alexandros-Apostolos A. Boulogeorgos, Nestor Chatzidiamantis, Harilaos G. Sandalidis +2
In this paper, we introduce a theoretical framework for analyzing the performance of multi-reconfigurable intelligence surface (RIS) empowered terahertz (THz) wireless systems subj…
Outage performance analysis of RIS-assisted UAV wireless systems under disorientation and misalignment
Alexandros-Apostolos A. Boulogeorgos, Angeliki Alexiou, Marco Di Renzo
In this paper, we analyze the performance of a reconfigurable intelligent surface (RIS)-assisted unmanned aerial vehicle (UAV) wireless system that is affected by mixture-gamma sma…
Toward Autonomous Reconfigurable Intelligent Surfaces Through Wireless Energy Harvesting
Konstantinos Ntontin, Alexandros-Apostolos A. Boulogeorgos, Emil Björnson +9
In this work, we examine the potential of autonomous operation of a reconfigurable intelligent surface (RIS) using wireless energy harvesting from information signals. To this end,…
Cascaded Composite Turbulence and Misalignment: Statistical Characterization and Applications to Reconfigurable Intelligent Surface-Empowered Wireless Systems
Alexandros-Apostolos A. Boulogeorgos, Nestor Chatzidiamantis, Harilaos G. Sandalidis +2
Reconfigurable intelligent surfaces (RISs) empowered high-frequency (HF) wireless systems are expected to become the supporting pillar for several reliability and data rate hungry…
Autonomous Reconfigurable Intelligent Surfaces Through Wireless Energy Harvesting
Konstantinos Ntontin, Alexandros-Apostolos A. Boulogeorgos, Emil Björnson +7
In this paper, we examine the potential for a reconfigurable intelligent surface (RIS) to be powered by energy harvested from information signals. This feature might be key to reap…
Pathloss modeling of reconfigurable intelligent surface assisted THz wireless systems
Alexandros-Apostolos A. Boulogeorgos, Angeliki Alexiou
This paper presents an analytical pathloss model for reconfigurable intelligent surface (RIS) assisted terahertz (THz) wireless systems. Specifically, the model accommodates both t…
Reconfigurable Intelligent Surface Optimal Placement in Millimeter-Wave Networks
Konstantinos Ntontin, Alexandros-Apostolos A. Boulogeorgos, Dimitrios Selimis +3
This work discusses the optimal reconfigurable intelligent surface placement in highly-directional millimeter wave links. In particular, we present a novel system model that takes…
Performance Evaluation of Reconfigurable Intelligent Surface Assisted D-band Wireless Communication
Evangelos N. Papasotiriou, Alexandros-Apostolos A. Boulogeorgos, Antigone Stratakou +1
In the recent years, the proliferation of wireless data traffic has led the scientific community to explore the use of higher unallocated frequency bands, such as the millimeter wa…
Ergodic capacity analysis of reconfigurable intelligent surface assisted wireless systems
Alexandros-Apostolos A. Boulogeorgos, Angeliki Alexiou
This paper presents the analytic framework for evaluating the ergodic capacity (EC) of the reconfigurable intelligent surface (RIS) assisted systems. Moreover, high-signal-to-noise…
Outage Probability Analysis of THz Relaying Systems
Alexandros-Apostolos A. Boulogeorgos, Angeliki Alexiou
This paper focuses on quantifying the outage performance of terahertz (THz) relaying systems. In this direction, novel closed-form expressions for the outage probability of a dual-…