no code implementations • 8 Oct 2023 • Walaa AlQwider, Aly Sabri Abdalla, Vuk Marojevic
The coexistence between active wireless communications and passive RF spectrum use becomes an increasingly important requirement for coordinated spectrum access supporting critical services.
no code implementations • 11 Jun 2023 • Aly Sabri Abdalla, Ali Behfarnia, Vuk Marojevic
This paper tackles the fundamental passive eavesdropping problem in modern wireless communications in which the location and the channel state information (CSI) of the attackers are unknown.
no code implementations • 18 Nov 2022 • Hossein Mohammadi, Vuk Marojevic, Bodong Shang
This paper introduces the deployment of unmanned aerial vehicles (UAVs) as lightweight wireless access points that leverage the fixed infrastructure in the context of the emerging open radio access network (O-RAN).
no code implementations • 8 Nov 2022 • Bo Tang, Vijay K. Shah, Vuk Marojevic, Jeffrey H. Reed
This article presents a general automated, distributed and AI-enabled testing framework to test AI models deployed in O-RAN in terms of their decision-making performance, vulnerability and security.
no code implementations • 26 Sep 2022 • Mohammadreza Kouchaki, Vuk Marojevic
Open Radio Access Network (O-RAN) has introduced an emerging RAN architecture that enables openness, intelligence, and automated control.
no code implementations • 13 Jul 2022 • Aly Sabri Abdalla, Vuk Marojevic
This paper defines the problem of optimizing the downlink multi-user multiple input, single output (MU-MISO) sum-rate for ground users served by an aerial reconfigurable intelligent surface (ARIS) that acts as a relay to the terrestrial base station.
no code implementations • 1 Feb 2022 • Hossein Mohammadi, Maryam Sabbaghian, Vuk Marojevic
The evolution of wireless systems has led to a continuous increase in the demand for radio frequency spectrum.
no code implementations • 24 Jan 2022 • Hossein Mohammadi, Walaa AlQwider, Talha Faizur Rahman, Vuk Marojevic
Research has shown that communications systems and receivers suffer from high power adjacent channel signals, called blockers, that drive the radio frequency (RF) front end into nonlinear operation.
no code implementations • 3 Jan 2022 • Keith Powell, Andrew Yingst, Talha Faizur Rahman, Vuk Marojevic
Mobility management is the key feature of cellular networks.
no code implementations • 21 Dec 2021 • Aly Sabri Abdalla, Ali Behfarnia, Vuk Marojevic
Simulation results show fast convergence and the highest secrecy capacity of the proposed DQN compared to Q-learning and baseline approaches.
no code implementations • 11 Dec 2021 • Aly Sabri Abdalla, Andrew Yingst, Keith Powell, Antoni Gelonch-Bosch, Vuk Marojevic
Cellular network-connected unmanned aerial vehicles (UAVs) experience different radio propagation conditions than radio nodes on the ground.
no code implementations • 1 Jun 2021 • Talha F. Rahman, Aly Sabri Abdalla, Keith Powell, Walaa AlQwider, Vuk Marojevic
Artificial intelligence (AI) will play an increasing role in cellular network deployment, configuration and management.
no code implementations • 5 Apr 2021 • Junsung Choi, Vuk Marojevic, Carl B. Dietrich, Seungyoung Ahn
From our measurements, we find that the warning application coverage range is independent of the train speed, that the omnidirectional antenna with high transmission power is the best configuration for our system, and that the latency values are mostly less than 5 ms. We use the radio communication coverage to evaluate the time to avoid collision and introduce the safeness level metric.
no code implementations • 8 Dec 2020 • Aly Sabri Abdalla, Talha Faizur Rahman, Vuk Marojevic
A reconfigurable intelligent surface (RIS) is a metamaterial that can be integrated into walls and influence the propagation of electromagnetic waves.
no code implementations • 8 Sep 2020 • Aly Sabri Abdalla, Vuk Marojevic
The focus is on maximizing the secrecy energy efficiency by jointly optimizing the uplink transmission powers of the ground users and the position of the UAV.
no code implementations • 8 Sep 2020 • Aly Sabri Abdalla, Vuk Marojevic
An unmanned aircraft system (UAS) consists of an unmanned aerial vehicle (UAV) and its controller which use radios to communicate.
no code implementations • 1 Jul 2020 • Aly Sabri Abdalla, Keith Powell, Vuk Marojevic, Giovanni Geraci
Unmanned aerial vehicles (UAVs) are emerging as enablers for supporting many applications and services, such as precision agriculture, search and rescue, temporary network deployment or coverage extension, and security.
no code implementations • 24 Jun 2020 • Aly Sabri Abdalla, Vuk Marojevic
Unmanned aerial vehicles (UAVs) are emerging in commercial spaces and will support many applications and services, such as smart agriculture, dynamic network deployment, and network coverage extension, surveillance and security.
no code implementations • 2 Jun 2020 • Raghunandan M. Rao, Vuk Marojevic, Jeffrey H. Reed
Moreover, the channel will be bimodal as a result of the periodic interference.
no code implementations • 15 May 2020 • Aly Sabri Abdalla, Bodong Shang, Vuk Marojevic, Lingjia Liu
The Internet of Things (IoT) will soon be omnipresent and billions of sensors and actuators will support our industries and well-being.
no code implementations • 21 Nov 2018 • Miao Yao, Munawwar Sohul, Vuk Marojevic, Jeffrey H. Reed
Massive multiple-input multiple-output antenna systems, millimeter wave communications, and ultra-dense networks have been widely perceived as the three key enablers that facilitate the development and deployment of 5G systems.