12 citations · 43 across the 18 of their papers we have counts for
24 papers
A Survey on Detection, Classification, and Tracking of UAVs using Radar and Communications Systems
Wahab Khawaja, Martins Ezuma, Vasilii Semkin +3
The use of unmanned aerial vehicles (UAVs) for a variety of commercial, civilian, and defense applications has increased many folds in recent years. While UAVs are expected to tran…
A Survey on Detection, Tracking, and Classification of Aerial Threats using Radars and Communications Systems
Wahab Khawaja, Martins Ezuma, Vasilii Semkin +3
The use of unmanned aerial vehicles (UAVs) for different applications has increased many folds in recent years. The UAVs are expected to change the future air operations. However,…
A Framework for Developing Algorithms for Estimating Propagation Parameters from Measurements
Akbar Sayeed, Peter Vouras, Camillo Gentile +13
A framework is proposed for developing and evaluating algorithms for extracting multipath propagation components (MPCs) from measurements collected by sounders at millimeter-wave (…
Channel Rank Improvement in Urban Drone Corridors Using Passive Intelligent Reflectors
Ender Ozturk, Chethan Kumar Anjinappa, Fatih Erden +3
Multiple-input multiple-output (MIMO) techniques can help in scaling the achievable air-to-ground (A2G) channel capacity while communicating with drones. However, spatial multiplex…
Sub-Terahertz and mmWave Penetration Loss Measurements for Indoor Environments
Kairui Du, Ozgur Ozdemir, Fatih Erden +1
Millimeter-wave (mmWave) and terahertz (THz) spectrum can support significantly higher data rates compared to lower frequency bands and hence are being actively considered for 5G w…
28 GHz Indoor and Outdoor Propagation Analysis at a Regional Airport
Kairui Du, Ozgur Ozdemir, Fatih Erden +1
In the upcoming 5G communication, the millimeter-wave (mmWave) technology will play an important role due to its large bandwidth and high data rate. However, mmWave frequencies hav…
Base Station and Passive Reflectors Placement for Urban mmWave Networks
Chethan Kumar Anjinappa, Fatih Erden, Ismail Guvenc
The use of millimeter-wave (mmWave) bands in 5G networks introduce a new set of challenges to network planning. Vulnerability to blockages and high path loss at mmWave frequencies…
EMR: A New Metric to Assess the Resilience of Directional mmWave Channels to Blockages
Fatih Erden, Ozgur Ozdemir, Ismail Guvenc +1
Millimeter-wave (mmWave) communication systems require narrow beams to increase communication range. If the dominant communication direction is blocked by an obstacle, an alternati…
RF-Based Low-SNR Classification of UAVs Using Convolutional Neural Networks
Ender Ozturk, Fatih Erden, Ismail Guvenc
This paper investigates the problem of classification of unmanned aerial vehicles (UAVs) from radio frequency (RF) fingerprints at the low signal-to-noise ratio (SNR) regime. We us…
Outdoor mmWave Base Station Placement: A Multi-Armed Bandit Learning Approach
Fatih Erden, Chethan K. Anjinappa, Ender Ozturk +1
Base station (BS) placement in mobile networks is critical to the efficient use of resources in any communication system and one of the main factors that determines the quality of…
UAV Aided Search and Rescue Operation Using Reinforcement Learning
Shriyanti Kulkarni, Vedashree Chaphekar, Md Moin Uddin Chowdhury +2
Owing to the enhanced flexibility in deployment and decreasing costs of manufacturing, the demand for unmanned aerial vehicles (UAVs) is expected to soar in the upcoming years. In…
28 GHz mmWave Channel Measurements: A Comparison of Horn and Phased Array Antennas and Coverage Enhancement Using Passive and Active Repeaters
Ozgur Ozdemir, Fatih Erden, Ismail Guvenc +2
Propagation channel characteristics are substantially different in sub-6 GHz and millimeter-wave (mmWave) bands. A typical mmWave link experiences more than an order-of-magnitude l…
Multiple Ray Received Power Modeling for mmWave Indoor and Outdoor Scenarios
Wahab Khawaja, Ozgur Ozdemir, Fatih Erden +2
Millimeter-wave (mmWave) frequency bands are expected to be used for future 5G networks due to the availability of large unused spectrum. However, the attenuation at mmWave frequen…
28 GHz mmWave Channel Measurements and Modeling in a Library Environment
Fatih Erden, Ozgur Ozdemir, Ismail Guvenc
To fully exploit the millimeter-wave bands for the fifth generation cellular systems, an accurate understanding of the channel propagation characteristics is required, and hence ex…
Adaptive Kalman Tracking for Indoor Visible Light Positioning
Yusuf Eroglu, Fatih Erden, Ismail Guvenc
Visible light communication (VLC) utilizes light-emitting diodes (LEDs) to transmit wireless data. A VLC network can also be used to localize mobile users in indoor environments, w…
Detection and Classification of UAVs Using RF Fingerprints in the Presence of Interference
Martins Ezuma, Fatih Erden, Chethan Kumar Anjinappa +2
This paper investigates the problem of detection and classification of unmanned aerial vehicles (UAVs) in the presence of wireless interference signals using a passive radio freque…
Vehicular LTE Connectivity Analysis in Urban and Rural Environments using USRP Measurements
Karthik Vasudeva, Ozgur Ozdemir, Sugan R. S. Chandar +2
The intelligent transportation system (ITS) offers a wide range of applications related to traffic management, which often require high data rate and low latency. The ubiquitous co…
Correction of Channel Sounding Clock Drift and Antenna Rotation Effects for mmWave Angular Profile Measurements
Fatih Erden, Ozgur Ozdemir, Wahab Khawaja +1
Millimeter-wave (mmWave) bands will be used for the fifth generation communication systems to support high data rates. For the proper characterization of the mmWave propagation cha…
Ultra-Wideband Air-to-Ground Propagation Channel Characterization in an Open Area
Wahab Ali Gulzar Khawaja, Ozgur Ozdemir, Fatih Erden +2
This paper studies the air-to-ground (AG) ultra-wideband (UWB) propagation channel through measurements between 3.1 GHz to 4.8 GHz using unmanned-aerial-vehicles (UAVs). Different…
RSS-Based Q-Learning for Indoor UAV Navigation
Md Moin Uddin Chowdhury, Fatih Erden, Ismail Guvenc
In this paper, we focus on the potential use of unmanned aerial vehicles (UAVs) for search and rescue (SAR) missions in GPS-denied indoor environments. We consider the problem of n…
Coverage Enhancement for NLOS mmWave Links Using Passive Reflectors
Wahab Khawaja, Ozgur Ozdemir, Yavuz Yapici +3
The future 5G networks are expected to use millimeter wave (mmWave) frequency bands to take advantage of large unused spectrum. However, due to the high path loss at mmWave frequen…
Micro-UAV Detection and Classification from RF Fingerprints Using Machine Learning Techniques
Martins Ezuma, Fatih Erden, Chethan Kumar Anjinappa +2
This paper focuses on the detection and classification of micro-unmanned aerial vehicles (UAVs) using radio frequency (RF) fingerprints of the signals transmitted from the controll…
UWB Air-to-Ground Propagation Channel Measurements and Modeling using UAVs
Wahab Khawaja, Ozgur Ozdemir, Fatih Erden +2
This paper presents an experimental study of the air-to-ground (AG) propagation channel through ultrawideband(UWB) measurements in an open area using unmanned-aerial-vehicles (UAVs…
Effect of Passive Reflectors for Enhancing Coverage of 28 GHz mmWave Systems in an Outdoor Setting
Wahab Ali Gulzar Khawaja, Ozgur Ozdemir, Fatih Erden +3
The availability of large unused spectrum at millimeter wave (mmWave) frequency bands has steered the future 5G research towards these bands. However, mmWave signals are attenuated…