Search Results for author: Vuk Marojevic

Found 21 papers, 0 papers with code

5G Advanced: Wireless Channel Virtualization and Resource Mapping for Real Time Spectrum Sharing

no code implementations8 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.

Astronomy Management

UAV Trajectory and Multi-User Beamforming Optimization for Clustered Users Against Passive Eavesdropping Attacks With Unknown CSI

no code implementations11 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.

Analysis of Reinforcement Learning Schemes for Trajectory Optimization of an Aerial Radio Unit

no code implementations18 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).

Q-Learning reinforcement-learning +1

AI Testing Framework for Next-G O-RAN Networks: Requirements, Design, and Research Opportunities

no code implementations8 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.

Decision Making

Actor-Critic Network for O-RAN Resource Allocation: xApp Design, Deployment, and Analysis

no code implementations26 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.

Reinforcement Learning (RL)

DDPG Learning for Aerial RIS-Assisted MU-MISO Communications

no code implementations13 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.

Q-Learning

Self Interference Management in In-Band Full-Duplex Systems

no code implementations1 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.

Management

AI-Driven Demodulators for Nonlinear Receivers in Shared Spectrum with High-Power Blockers

no code implementations24 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.

Aerial Base Station Positioning and Power Control for Securing Communications: A Deep Q-Network Approach

no code implementations21 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.

Position Q-Learning +2

Open-Source Software Radio Platform for Research on Cellular Networked UAVs -- It Works!

no code implementations11 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.

Network and Physical Layer Attacks and countermeasures to AI-Enabled 6G O-RAN

no code implementations1 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.

Management

DSRC-Enabled Train Safety Communication System at Unmanned Crossings

no code implementations5 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.

UAVs with Reconfigurable Intelligent Surfaces: Applications, Challenges, and Opportunities

no code implementations8 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.

Securing Mobile Multiuser Transmissions with UAVs in the Presence of Multiple Eavesdroppers

no code implementations8 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.

Position

Communications Standards for Unmanned Aircraft Systems: The 3GPP Perspective and Research Drivers

no code implementations8 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.

Management

UAV-Assisted Attack Prevention, Detection, and Recovery of 5G Networks

no code implementations1 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.

Machine Learning-Assisted UAV Operations with UTM: Requirements, Challenges, and Solutions

no code implementations24 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.

BIG-bench Machine Learning Management

Securing Mobile IoT with Unmanned Aerial Systems

no code implementations15 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.

Artificial Intelligence-Defined 5G Radio Access Networks

no code implementations21 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.

Cannot find the paper you are looking for? You can Submit a new open access paper.