no code implementations • 8 Feb 2024 • Wahab Khawaja, Martins Ezuma, Vasilii Semkin, Fatih Erden, Ozgur Ozdemir, Ismail Guvenc
Radar systems are further divided into conventional and modern radar systems, while communication systems can be used for joint communications and sensing (JC&S) in active mode and act as a source of illumination to passive radars for DCT-U.
no code implementations • 24 Jul 2023 • Sung Joon Maeng, Hyeokjun Kwon, Ozgur Ozdemir, İsmail Güvenç
By analyzing reference signal received power (RSRP) using path loss models that account for antenna patterns, we observed that our measurement results, obtained at different UAV heights, aligned well with the two-ray path loss model when incorporating the measured antenna pattern.
no code implementations • 12 Jul 2023 • Sung Joon Maeng, Ozgur Ozdemir, Ismail Guvenc, Mihail L. Sichitiu
In particular, we introduce a 3D Kriging interpolation technique that uses realistic 3D correlation models of the signal power extracted from extensive measurements carried out at the NSF AERPAW platform.
no code implementations • 25 Jun 2023 • Ashwini Pondeycherry Ganesh, Wahab Khawaja, Ozgur Ozdemir, Ismail Guvenc, Hiroyuki Nomoto, Yasuaki Ide
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.
no code implementations • 3 Mar 2023 • Sung Joon Maeng, Ozgur Ozdemir, İsmail Güvenç, Mihail L. Sichitiu, Magreth Mushi, Rudra Dutta, Monisha Ghosh
In this paper, we report experimental results in collectting and processing 5G NR I/Q samples in the 3. 7~GHz C-band by using software-defined radio (SDR)-mounted helikite.
no code implementations • 3 Mar 2023 • Sung Joon Maeng, Ozgur Ozdemir, İsmail Güvenç, Mihail L. Sichitiu, Magreth Mushi, Rudra Dutta
However, there are limited data sets to study the coverage of cellular technologies for UAV flights at different altitudes and develop machine learning (ML) techniques for improving UAV communication and navigation.
no code implementations • 6 Jan 2023 • Amir Hossein Fahim Raouf, Sung Joon Maeng, Ismail Guvenc, Ozgur Ozdemir, Mihail Sichitiu
Due to the scarcity of spectrum resources, the emergence of new technologies and ever-increasing number of wireless devices operating in the radio frequency spectrum lead to data congestion and interference.
no code implementations • 18 Nov 2022 • Wahab Khawaja, Martins Ezuma, Vasilii Semkin, Fatih Erden, Ozgur Ozdemir, Ismail Guvenc
Finally, limitations of radar systems and comparison with other techniques that do not rely on radars for detection, tracking, and classification of aerial threats are provided.
no code implementations • 14 Oct 2022 • Sung Joon Maeng, Ozgur Ozdemir, İsmail Güvenç, Mihail Sichitiu, Rudra Dutta, Magreth Mushi
In this paper, we introduce AERIQ: a software-defined radio (SDR) based I/Q measurement and analysis framework for wireless signals for aerial experimentation.
no code implementations • 15 Mar 2022 • Chethan K. Anjinappa, Ashwini P. Ganesh, Ozgur Ozdemir, Kris Ridenour, Wahab Khawaja, Ismail Guvenc, Hiroyuki Nomoto, Yasuaki Ide
The measurement results suggest that the transparent reflector, apart from an obvious advantage of transparency, has a higher penetration loss than the common indoor materials (excluding metal) and performs similarly to metal in terms of reflection.
no code implementations • 18 Nov 2021 • Sung Joon Maeng, İsmail Güvenç, Mihail L. Sichitiu, Ozgur Ozdemir
In order to operate an RDZ, use of a real-time spectrum monitoring system carries critical importance.
no code implementations • 2 Sep 2021 • Kairui Du, Omkar Mujumdar, Ozgur Ozdemir, Ender Ozturk, Ismail Guvenc, Mihail L. Sichitiu, Huaiyu Dai, Arupjyoti Bhuyan
In this work, we investigated the propagation and scattering behavior of 60 GHz mmWave signals in outdoor environments at a travel distance of 98 m for an aerial link (rooftop to rooftop), and 147 m for a ground link (light-pole to light-pole).
no code implementations • 17 Aug 2021 • Udita Bhattacherjee, Ender Ozturk, Ozgur Ozdemir, Ismail Guvenc, Mihail L. Sichitiu, Huaiyu Dai
First, the Keysight sensor detects the UAV by comparing the received RF signature with various other UAVs' RF signatures in the Keysight database using an envelope detection algorithm.
no code implementations • 3 Mar 2021 • Kairui Du, Ozgur Ozdemir, Fatih Erden, Ismail Guvenc
In this work, we measured the penetration loss and the attenuation of several common constructional materials at mmWave (28 and 39 GHz) and sub-THz (120 and 144 GHz) bands.
no code implementations • 7 Jan 2021 • Kairui Du, Ozgur Ozdemir, Fatih Erden, Ismail Guvenc
What is more, in non-line-of-sight (NLOS) propagation, the attenuation of mmWave is larger compared to the lower frequencies, which can seriously degrade the performance.
no code implementations • 4 Oct 2020 • 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.
no code implementations • 30 Sep 2020 • Fatih Erden, Ozgur Ozdemir, Ismail Guvenc, David W. Matolak
Millimeter-wave (mmWave) communication systems require narrow beams to increase communication range.
no code implementations • 27 Apr 2020 • Nozhan Hosseini, Mahfuza Khatun, Changyu Guo, Kairui Du, Ozgur Ozdemir, David W. Matolak, Ismail Guvenc, Hani Mehrpouyan
Typical building material attenuations in these high frequency ranges are of interest for link budget calculations.