725 citations · 3k across the 227 of their papers we have counts for
26 papers · 1 filter
Multi-Target Two-way Integrated Sensing and Communications with Full Duplex MIMO Radios
Muhammad Talha, Besma Smida, Md Atiqul Islam +1
In this paper, we propose a multiple input multiple output (MIMO) Full-Duplex Integrated Sensing and Communication System consisting of multiple targets, a single downlink, and a s…
Power Minimizing MEC Offloading with QoS Constraints over RIS-Empowered Communications
Mattia Merluzzi, Francesca Costanzo, Konstantinos D. Katsanos +2
This work lies at the intersection of two cutting edge technologies envisioned to proliferate in future 6G wireless systems: Multi-access Edge Computing (MEC) and Reconfigurable In…
Reconfigurable Intelligent Surfaces for 6G: Emerging Hardware Architectures, Applications, and Open Challenges
Ertugrul Basar, George C. Alexandropoulos, Yuanwei Liu +5
Reconfigurable intelligent surfaces (RISs) are rapidly gaining prominence in the realm of fifth generation (5G)-Advanced, and predominantly, sixth generation (6G) mobile networks,…
Wideband THz Multi-User Downlink Communications with Leaky Wave Antennas
Natalie Lang, Yaela Gabay, Nir Shlezinger +4
Future wireless systems are envisioned to utilize the large spectra available at THz bands for wireless communications. Extremely massive multiple-input multiple-output (MIMO) ante…
RIS Position and Orientation Estimation via Multi-Carrier Transmissions and Multiple Receivers
Reza Ghazalian, Hui Chen, George C. Alexandropoulos +3
Reconfigurable intelligent surfaces (RISs) are considered as an enabling technology for the upcoming sixth generation of wireless systems, exhibiting significant potential for radi…
Autoregressive Attention Neural Networks for Non-Line-of-Sight User Tracking with Dynamic Metasurface Antennas
Kyriakos Stylianopoulos, Murat Bayraktar, Nuria González Prelcic +1
User localization and tracking in the upcoming generation of wireless networks have the potential to be revolutionized by technologies such as the Dynamic Metasurface Antennas (DMA…
Time-Domain Channel Estimation for Extremely Large MIMO THz Communication Systems Under Dual-Wideband Fading Conditions
Evangelos Vlachos, Aryan Kaushik, Yonina C. Eldar +1
In this paper, we study the problem of extremely large (XL) multiple-input multiple-output (MIMO) channel estimation in the terahertz (THz) frequency band, considering the presence…
On the Performance Analysis of RIS-Empowered Communications Over Nakagami-m Fading
Dimitris Selimis, Kostas P. Peppas, George C. Alexandropoulos +1
In this paper, we study the performance of wireless communications empowered by Reconfigurable Intelligent Surface (RISs) over Nakagami-m fading channels. We consider two phase con…
Massive Access of Static and Mobile Users via Reconfigurable Intelligent Surfaces: Protocol Design and Performance Analysis
Xuelin Cao, Bo Yang, Chongwen Huang +5
The envisioned wireless networks of the future entail the provisioning of massive numbers of connections, heterogeneous data traffic, ultra-high spectral efficiency, and low latenc…
Iterative Interference Cancellation for Time Reversal Division Multiple Access
Ali Mokh, George C. Alexandropoulos, Mohamed Kamoun +4
Time Reversal (TR) has been proposed as a competitive precoding strategy for low-complexity devices, relying on ultra-wideband waveforms. This transmit processing paradigm can addr…
Spatial Secrecy Spectral Efficiency Optimization Enabled by Reconfigurable Intelligent Surfaces
Konstantinos D. Katsanos, George C. Alexandropoulos
Reconfigurable Intelligent Surfaces (RISs) constitute a strong candidate physical-layer technology for the -th Generation (6G) of wireless networks, offering new design degrees…
Full-Duplex-Enabled Joint Communications and Sensing with Reconfigurable Intelligent Surfaces
Chandan Kumar Sheemar, George C. Alexandropoulos, Dirk Slock +2
The full-duplex (FD) technology has the potential to radically evolve wireless systems, facilitating the integration of both communications and radar functionalities into a single…
Lyapunov-Driven Deep Reinforcement Learning for Edge Inference Empowered by Reconfigurable Intelligent Surfaces
Kyriakos Stylianopoulos, Mattia Merluzzi, Paolo Di Lorenzo +1
In this paper, we propose a novel algorithm for energy-efficient, low-latency, accurate inference at the wireless edge, in the context of 6G networks endowed with reconfigurable in…
Stacked Intelligent Metasurfaces for Efficient Holographic MIMO Communications in 6G
Jiancheng An, Chao Xu, Derrick Wing Kwan Ng +4
The revolutionary technology of \emph{Stacked Intelligent Metasurfaces (SIM)} has been recently shown to be capable of carrying out advanced signal processing directly in the nativ…
Full-Duplex Wireless for 6G: Progress Brings New Opportunities and Challenges
Besma Smida, Ashutosh Sabharwal, Gabor Fodor +3
The use of in-band full-duplex (FD) enables nodes to simultaneously transmit and receive on the same frequency band, which challenges the traditional assumption in wireless network…
WiThRay: A Versatile Ray-Tracing Simulator for Smart Wireless Environments
Hyuckjin Choi, Jaehoon Chung, Jaeky Oh +2
This paper presents the development and evaluation of WiThRay, a new wireless three-dimensional ray-tracing (RT) simulator. RT-based simulators are widely used for generating reali…
Performance of RIS-Aided Nearfield Localization under Beams Approximation from Real Hardware Characterization
Moustafa Rahal, Benoit Denis, Kamran Keykhosravi +4
The technology of reconfigurable intelligent surfaces (RIS) has been showing promising potential in a variety of applications relying on Beyond-5G networks. Reconfigurable intellig…
RIS-Enabled Smart Wireless Environments: Deployment Scenarios, Network Architecture, Bandwidth and Area of Influence
George C. Alexandropoulos, Dinh-Thuy Phan-Huy, Kostantinos D. Katsanos +19
Reconfigurable Intelligent Surfaces (RISs) constitute the key enabler for programmable electromagnetic propagation environments, and are lately being considered as a candidate phys…
On the Impact of Control Signaling in RIS-Empowered Wireless Communications
Fabio Saggese, Victor Croisfelt, Radosław Kotaba +3
The research on Reconfigurable Intelligent Surfaces (RISs) has dominantly been focused on physical-layer aspects and analyses of the achievable adaptation of the wireless propagati…
Robust Millimeter Beamforming via Self-Supervised Hybrid Deep Learning
Fenghao Zhu, Bohao Wang, Zhaohui Yang +5
Beamforming with large-scale antenna arrays has been widely used in recent years, which is acknowledged as an important part in 5G and incoming 6G. Thus, various techniques are lev…
Full Duplex Holographic MIMO for Near-Field Integrated Sensing and Communications
Ioannis Gavras, Md Atiqul Islam, Besma Smida +1
This paper presents an in-band Full Duplex (FD) integrated sensing and communications system comprising a holographic Multiple-Input Multiple-Output (MIMO) base station, which is c…
Indexed Multiple Access with Reconfigurable Intelligent Surfaces: The Reflection Tuning Potential
Rohit Singh, Aryan Kaushik, Wonjae Shin +3
Indexed modulation (IM) is an evolving technique that has become popular due to its ability of parallel data communication over distinct combinations of transmission entities. In t…
Channel Modeling and Multi-User Precoding for Tri-Polarized Holographic MIMO Communications
Li Wei, Chongwen Huang, George C. Alexandropoulos +5
This paper studies the exploitation of triple polarization (TP) for multi-user (MU) holographic multiple-input multiple-output surface (HMIMOS) wireless communication systems, aimi…
On the Tacit Linearity Assumption in Common Cascaded Models of RIS-Parametrized Wireless Channels
Antonin Rabault, Luc Le Magoarou, Jérôme Sol +4
We analytically derive from first physical principles the functional dependence of wireless channels on the RIS configuration for generic (i.e., potentially complex-scattering) RIS…