18 citations · 26 across the 10 of their papers we have counts for
12 papers
Segment-Wise Soft Robotics Inspired Flexible Antenna Arrays: Design and Optimization
Shuaishuai Han, Konstantinos Ntougias, Elio Faddoul +1
In this paper, we propose a segment-wise soft robotic antenna (SRA) system, where each soft robotic arm referred to as a tentacle, comprises multiple independently controllable seg…
A Family of Hybrid Beyond-Diagonal RIS Architectures: Design and Performance Analysis
Konstantinos Ntougias, Ioannis Krikidis
Beyond-diagonal reconfigurable intelligent surfaces (BD-RISs) extend conventional diagonal RISs by allowing inter-element coupling, thereby enlarging the set of attainable scatteri…
Reconfigurable Antenna Arrays With Tunable Loads: Expanding Solution Space via Coupling Control
Elio Faddoul, Konstantinos Ntougias, Ioannis Krikidis
The emerging reconfigurable antenna (RA) array technology promises capacity enhancement through dynamic antenna positioning. Traditional approaches enforce half-wavelength or great…
Soft Robotics-Inspired Flexible Antenna Arrays
Elio Faddoul, Andreas Nicolaides, Konstantinos Ntougias +1
In this work, a novel soft continuum robot-inspired antenna array is proposed, featuring tentacle-like structures with multiple antenna elements. The proposed array achieves reconf…
Wireless Information and Energy Transfer in the Era of 6G Communications
Constantinos Psomas, Konstantinos Ntougias, Nikita Shanin +8
Wireless information and energy transfer (WIET) represents an emerging paradigm which employs controllable transmission of radio-frequency signals for the dual purpose of data comm…
Hybrid RIS With Sub-Connected Active Partitions: Performance Analysis and Transmission Design
Konstantinos Ntougias, Symeon Chatzinotas, Ioannis Krikidis
The emerging reflecting intelligent surface (RIS) technology promises to enhance the capacity of wireless communication systems via passive reflect beamforming. However, the produc…
An Overview of Analysis Methods and Evaluation Results for Caching Strategies
Gerhard Hasslinger, Mahshid Okhovatzadeh, Konstantinos Ntougias +2
We survey analytical methods and evaluation results for the performance assessment of caching strategies. Knapsack solutions are derived, which provide static caching bounds for in…
Probabilistically Robust Optimization of IRS-aided SWIPT Under Coordinated Spectrum Underlay
Konstantinos Ntougias, Ioannis Krikidis
This study considers the Joint Transmit/Reflect Beamforming and Power Splitting (JTRBPS) optimization problem in a spectrum underlay setting, such that the transmit sum-energy of t…
Simultaneous Wireless Information and Power Transfer for Federated Learning
José Mairton B. da Silva, Konstantinos Ntougias, Ioannis Krikidis +2
In the Internet of Things, learning is one of most prominent tasks. In this paper, we consider an Internet of Things scenario where federated learning is used with simultaneous tra…
Energy Efficient Altitude Optimization of an Aerial Access Point
Nithin Babu, Konstantinos Ntougias, Constantinos B Papadias +1
In this paper, we propose an energy-efficient optimal altitude for an aerial access point (AAP), which acts as a flying base station to serve a set of ground user equipment (UE). S…
Maximizing the Mutual Information of Multi-Antenna Links Under an Interfered Receiver Power Constraint
George K. Papageorgiou, Konstantinos Ntougias, Constantinos B. Papadias
Single-user multiple-input / multiple-output (SU-MIMO) communication systems have been successfully used over the years and have provided a significant increase on a wireless link'…
Reducing Complexity in Next-Generation MU-MIMO Systems
Konstantinos Ntougias, Dimitrios Ntaikos, Constantinos B. Papadias
Recently, several advanced multi-antenna radio communications technologies have emerged to meet the increased capacity demands in wireless multi-user networks. Despite their great…