12 citations · 29 across the 19 of their papers we have counts for
22 papers · 1 filter
Adaptive 5G Resource Allocation for Multistatic ISAC-Based UAV Detection and Tracking
Cole Dickerson, Wahab Khawaja, Ismail Guvenc
Unmanned aerial vehicles (UAVs) enable numerous commercial and public-safety applications, yet they also create security risks near critical infrastructure, transportation hubs, an…
Improvement of DVB-S2/S2X Performance Using External Synchronization
Wahab Khawaja, Nestor J Hernandez Marcano, Rune Hylsberg Jacobsen
Digital Video Broadcasting Satellite, Second Generation and its extension DVBS2X are widely used in modern satellite communications, where synchronization relies on physical layer…
Propagation Channel Modeling for LEO Satellite Missions Using Ray-Tracing Simulations
Wahab Khawaja, Ismail Guvenc, Rune Hylsberg Jacobsen
This work presents a high-resolution, ray-tracing-based channel modeling for Low Earth Orbit (LEO) satellite-to-ground links in a suburban environment at X-band. Using simulations…
Predicting Lifespan of Ground-to-Air Multipath Components in mmWave UAV Channels
Wahab Khawaja, Rune H. Jacobsen, Sajid Hussain +1
In mobile ground-to-air (GA) propagation channels, the birth and death of multipath components (MPCs) are frequently observed, and the wide-sense stationary uncorrelated scattering…
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…
Propagation Measurements and Coverage Analysis for mmWave and Sub-THz Frequency Bands with Transparent Reflectors
Ashwini Pondeycherry Ganesh, Wahab Khawaja, Ozgur Ozdemir +3
The emerging 5G and future 6G technologies are envisioned to provide higher bandwidths and coverage using millimeter wave (mmWave) and sub-Terahertz (THz) frequency bands. The grow…
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,…
Indoor Propagation Measurements with Sekisui Transparent Reflectors at 28/39/120/144 GHz
Chethan K. Anjinappa, Ashwini P. Ganesh, Ozgur Ozdemir +5
One of the critical challenges of operating with the terahertz or millimeter-wave wireless networks is the necessity of at least a strong non-line-of-sight (NLoS) reflected path to…
Doors in the Sky: Detection, Localization and Classification of Aerial Vehicles using Laser Mesh
Wahab Khawaja, Ender Ozturk, Ismail Guvenc
The stealth technology and unmanned aerial vehicles (UAVs) are expected to dominate current and future aerial warfare. The radar systems at their maximum operating ranges, however,…
Channel Prediction for mmWave Ground-to-Air Propagation under Blockage
Wahab Khawaja, Ozgur Ozdemir, Ismail Guvenc
Ground-to-air (GA) communication using unmanned aerial vehicles (UAVs) has gained popularity in recent years and is expected to be part of 5G networks and beyond. However, the GA 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…
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…
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…
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…
Impact of 3D UWB Antenna Radiation Pattern on Air-to-Ground Drone Connectivity
Jianlin Chen, Devin Raye, Wahab Khawaja +2
Three dimensional (3D) radiation pattern of an antenna mounted at a drone can significantly influence the air-to-ground (A2G) link quality. Even when a drone transmitter is very cl…
Indoor Coverage Enhancement for mmWave Systems with Passive Reflectors: Measurements and Ray Tracing Simulations
Wahab Khawaja, Ozgur Ozdemir, Yavuz Yapici +3
The future 5G networks are expected to use millimeter wave (mmWave) frequency bands, mainly due to the availability of large unused spectrum. However, due to high path loss at mmWa…
UWB Channel Sounding and Modeling for UAV Air-to-Ground Propagation Channels
Wahab Khawaja, Ismail Guvenc, David Matolak
Unmanned aerial vehicles (UAVs) are expected to be used extensively in the near future in applications such as aerial surveillance, transportation, and disaster assistance. The con…
Temporal and Spatial Characteristics of mmWave Propagation Channels for UAVs
Wahab Khawaja, Ozgur Ozdemir, Ismail Guvenc
Unmanned aerial vehicles~(UAVs) are envisioned to be an integral part of future 5G communication systems. The agile nature of UAVs for serving users at different locations can help…
Coverage Enhancement for mmWave Communications using Passive Reflectors
Wahab Khawaja, Ozgur Ozdemir, Yavuz Yapici +2
Millimeter wave (mmWave) technology is expected to dominate the future 5G networks mainly due to large spectrum available at these frequencies. However, coverage deteriorates signi…
A Survey of Air-to-Ground Propagation Channel Modeling for Unmanned Aerial Vehicles
Wahab Khawaja, Ismail Guvenc, David Matolak +2
In recent years, there has been a dramatic increase in the use of unmanned aerial vehicles (UAVs), particularly for small UAVs, due to their affordable prices, ease of availability…