5 citations · 10 across the 20 of their papers we have counts for
21 papers
Brain-Inspired User Positioning for mmWave Beam Management
Aris Karampelas Timotijevic, Evangelos Koutsonas, Vasileios Kouvakis +3
Wireless positioning is a key enabling functionality of high-frequency, highly directional wireless systems. Supporting beam tracking depends on accurately translating channel stat…
Dual-Graph Multi-Agent Reinforcement Learning for Handover Optimization
Matteo Salvatori, Filippo Vannella, Sebastian Macaluso +5
HandOver (HO) control in cellular networks is governed by a set of HO control parameters that are traditionally configured through rule-based heuristics. A key parameter for HO opt…
Waveform Design for Partial-Time Superimposed ISAC Systems
Xi Nan, Rugui Yao, Ye Fan +4
Nowadays, waveforms of integrated sensing and communication (ISAC) are almost based on conventional communication and sensing signal, which bounds both the communication and sensin…
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…
Analysis and Design of a Reconfigurable Metasurface based on Chalcogenide Phase-Change Material for Operation in the Near and Mid Infrared
Alexandros Pitilakis, Alexandros Katsios, Alexandros-Apostolos A. Boulogeorgos
We analyze, design and assess the performance of a reflective reconfigurable metasurface (MS) architecture for optical wireless communications. The device is based on the Ge-Sb-Te…
Markov Chain-based Model of Blockchain Radio Access Networks
Vasileios Kouvakis, Stylianos E. Trevlakis, Alexandros-Apostolos A. Boulogeorgos +3
Security has always been a priority, for researchers, service providers and network operators when it comes to radio access networks (RAN). One wireless access approach that has ca…
Simultaneous Information and Control Signalling Protocol for RIS-Empowered Wireless Systems
Evangelos Koutsonas, Xiaonan Mu, Nan Qi +3
Integration of RIS in radio access networks requires signaling between edge units and the RIS microcontroller (MC). Unfortunately, in several practical scenarios, the signaling lat…
Metaverse Framework for Wireless Systems Management
Ilias Chrysovergis, Alexandros-Apostolos A. Boulogeorgos, Theodoros A. Tsiftsis +1
This article introduces a comprehensive metaverse framework, which is designed for the simulation, emulation, and interaction with wireless systems. The proposed framework integrat…
Dual-UAV-Aided Covert Communications for Air-to-Ground ISAC Networks
Jingke Sun, Liang Yang, Alexandros-Apostolos A. Boulogeorgos +2
To enhance both the sensing and covert communication performance, a dual-unmanned aerial vehicle (UAV)-aided scheme is proposed for integrated sensing and communication networks, i…
Fairness vs. Equality: RSMA-Based Multi-Target and Multi-User Integrated Sensing and Communications
Xudong Li, Rugui Yao, Alexandros-Apostolos A. Boulogeorgos +1
This paper investigates the tradeoff between sensing and communication in an ISAC system comprising multiple sensing targets and communication users. A dual-functional base station…
Covert Communications in Active-IOS Aided Uplink NOMA Systems With Full-Duplex Receiver
Xueyu Kang, Nan Qi, Lu Lv +3
In this paper, an active intelligent omni-surface (A-IOS) is deployed to aid uplink transmissions in a non-orthogonal multiple access (NOMA) system. In order to shelter the covert…
Secure and Green RSMA-Assisted Heterogeneous ISAC
Xudong Li, Rugui Yao, Theodoros A. Tsiftsis +1
This paper investigates sensing, communication, security, and energy efficiency of the heterogeneous integrated sensing and communication networks under challenging operational con…
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…
Perpetual Reconfigurable Intelligent Surfaces Through In-Band Energy Harvesting: Architectures, Protocols, and Challenges
Konstantinos Ntontin, Alexandros-Apostolos A. Boulogeorgos, Sergi Abadal +3
Reconfigurable intelligent surfaces (RISs) are considered to be a key enabler of highly energy-efficient 6G and beyond networks. This property arises from the absence of power ampl…
AI-Powered Interfaces for Extended Reality to support Remote Maintenance
Akos Nagy, George Amponis, Konstantinos Kyranou +4
High-end components that conduct complicated tasks automatically are a part of modern industrial systems. However, in order for these parts to function at the desired level, they n…
Localization as a key enabler of 6G wireless systems: A comprehensive survey and an outlook
Stylianos E. Trevlakis, Alexandros-Apostolos A. Boulogeorgos, Dimitrios Pliatsios +4
When fully implemented, sixth generation (6G) wireless systems will constitute intelligent wireless networks that enable not only ubiquitous communication but also high-accuracy lo…
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,…
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,…