no code implementations • 22 Dec 2023 • Christos G. Tsinos, Alexandros-Apostolos A. Boulogeorgos, Theodoros A. Tsiftsis
Reconfigurable intelligent surfaces (RISs) operate similarly to electromagnetic (EM) mirrors and remarkably go beyond Snell law to generate an applicable EM environment allowing for flexible adaptation and fostering sustainability in terms of economic deployment and energy efficiency.
no code implementations • 23 Aug 2023 • Alexandros-Apostolos A. Boulogeorgos, Stylianos Trevlakis, Theodoros A. Tsiftsis
This paper focuses on providing a theoretical framework for the evaluation of the performance of holographic reconfigurable intelligent surface (HRIS) empowered terahertz (THz) wireless systems under fog conditions.
no code implementations • 23 Oct 2021 • Xuming An, Rongfei Fan, Han Hu, Ning Zhang, Saman Atapattu, Theodoros A. Tsiftsis
To solve this challenging problem, we decompose it as a one-dimensional search of task offloading decision problem and a non-convex optimization problem with task offloading decision given.
no code implementations • 26 Sep 2021 • Manzoor Ahmed, Wali Ullah Khan, Asim Ihsan, Xingwang Li, Jianbo Li, Theodoros A. Tsiftsis
In this paper, we introduce a BSC in multi-cell IoT network, where a source in each cell transmits superimposed signal to its associated IoT devices using NOMA.
no code implementations • 25 Nov 2020 • Xuming An, Rongfei Fan, Han Hu, Ning Zhang, Saman Atapattu, Theodoros A. Tsiftsis
To solve this challenging problem, we decompose it as a one-dimensional search of task offloading decision problem and a non-convex optimization problem with task offloading decision given.
Edge-computing Information Theory Information Theory
no code implementations • 22 Nov 2020 • Zhitong Ni, J. Andrew Zhang, Kai Yang, Xiaojing Huang, Theodoros A. Tsiftsis
For radar sensing, we consider optimizing one of two metrics, the mutual information or the Cramer-Rao bound.
no code implementations • 22 Jun 2020 • Theodoros A. Tsiftsis, Constantinos Valagiannopoulos, Hongwu Liu, Alexandros-Apostolos A. Boulogeorgos, Nikolaos I. Miridakis
The passive metasurface-coated devices can achieve ultra-high EE and EH besides the signal detection, combined with an enhanced secrecy rate at the legitimate user and/or improved spying capabilities of the eavesdroppers under ULP transmission.
no code implementations • 22 Jan 2020 • Saman Atapattu, Rongfei Fan, Prathapasinghe Dharmawansa, Gongpu Wang, Jamie Evans, Theodoros A. Tsiftsis
The channels between the two users and RIS can either be reciprocal or non-reciprocal.