Works (28)

Updated: April 5th, 2024 10:31

2023 article

AERIQ: SDR-Based LTE I/Q Measurement and Analysis Framework for Air-to-Ground Propagation Modeling

2023 IEEE AEROSPACE CONFERENCE.

By: S. Maeng n, O. Ozdemir n, I. Guvenc n, M. Sichitiu n, R. Dutta n & M. Mushi n

TL;DR: AERIQ is integrated into controllable aerial vehicles, it is flexible, repeatable, and provides raw I/Q samples for post-processing the data to extract various key parameters of interest (KPIs) over a 3D volume. (via Semantic Scholar)
Sources: Web Of Science, ORCID
Added: September 18, 2023

2023 article

Cellular Spectrum Occupancy Probability in Urban and Rural Scenarios at Various UAS Altitudes

2023 IEEE 34TH ANNUAL INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS, PIMRC.

By: A. Raouf n, S. Maeng n, I. Guvenc n, O. Ozdemir n & M. Sichitiu n

author keywords: 5G; AERPAW; C-Band; CBRS; drone; helikite; LTE; spectrum monitoring; unmanned aerial vehicles (UAV)
TL;DR: The findings reveal that the probability of occupancy is generally higher in the downlink compared to the uplink, and that line-of-sight (LoS) signals play a critical role in higher altitudes. (via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities (OpenAlex)
Sources: Web Of Science, ORCID
Added: January 29, 2024

2023 article

Demonstration of Joint SDR/UAV Experiment Development in AERPAW

MILCOM 2023 - 2023 IEEE MILITARY COMMUNICATIONS CONFERENCE.

By: A. Gurses n, M. Funderburk n, J. Kesler n, K. Powell*, T. Rahman*, O. Ozdemir n, M. Mushi n, M. Sichitiu n ...

TL;DR: This demo exercises the main three flexible testbed capabilities, namely the ability of an experimenter to choose a wireless radio setup, a vehicle setup, and to set up traffic. (via Semantic Scholar)
Sources: Web Of Science, ORCID
Added: March 25, 2024

2023 journal article

LTE I/Q Data Set for UAV Propagation Modeling, Communication, and Navigation Research

IEEE COMMUNICATIONS MAGAZINE, 61(9), 90–96.

By: S. Maeng n, O. Ozdemir n, I. Guvenc n, M. Sichitiu n, M. Mushi n & R. Dutta n

author keywords: Wireless communication; Visualization; Codes; Radio navigation; Metadata; Autonomous aerial vehicles; Long Term Evolution
TL;DR: This article introduces raw LTE in-phase and quadrature sample data sets obtained from physical field experiments of the NSF AERPAW experimentation platform and implements a standardized metadata format that can be used to replicate the results obtained from the collected datasets. (via Semantic Scholar)
Sources: Web Of Science, ORCID
Added: October 30, 2023

2023 article

Propagation Measurements and Coverage Analysis for mmWave and Sub-THz Frequency Bands with Transparent Reflectors

2023 IEEE 97TH VEHICULAR TECHNOLOGY CONFERENCE, VTC2023-SPRING.

By: A. Ganesh n, W. Khawaja n, O. Ozdemir n, I. Guvenc n, H. Nomoto* & Y. Ide*

author keywords: 5G; 6G; channel sounding; curved reflectors; flat reflectors; mmWave; ray tracing; sub-THz; transparent reflectors
TL;DR: Analysis of the use of passive transparent reflectors to improve signal coverage in an NLOS indoor scenario reveals that the transparent reflector outperforms the metal reflector and increases the radio propagation coverage in all three frequencies of interest: 28 GHz, 39 GHz, and 120 GHz. (via Semantic Scholar)
Sources: Web Of Science, ORCID
Added: November 20, 2023

2023 article

Spectrum Activity Monitoring and Analysis for Sub-6 GHz Bands Using a Helikite

2023 15TH INTERNATIONAL CONFERENCE ON COMMUNICATION SYSTEMS & NETWORKS, COMSNETS.

By: S. Maeng n, O. Ozdemir n, H. Nandakumar n, I. Guvenc n, M. Sichitiu n, R. Dutta n, M. Mushi n

author keywords: AERPAW; helikite; LTE; air-to-ground; software-defined radio; spectrum monitoring
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities (OpenAlex)
Sources: Web Of Science, ORCID
Added: May 30, 2023

2023 article

Spectrum Monitoring and Analysis in Urban and Rural Environments at Different Altitudes

2023 IEEE 97TH VEHICULAR TECHNOLOGY CONFERENCE, VTC2023-SPRING.

By: A. Raouf n, S. Maeng n, I. Guvenc n, O. Ozdemir n & M. Sichitiu n

author keywords: 5G; C-Band; CBRS; helikite; LTE; spectrum monitoring; unmanned aerial vehicles (UAV)
TL;DR: The results reveal that generally the mean value of the measured power increases as the altitude increases where the line-of-sight links with nearby base stations is more available. (via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities (OpenAlex)
Sources: Web Of Science, ORCID
Added: November 20, 2023

2022 article

60 GHz Outdoor Propagation Measurements and Analysis Using Facebook Terragraph Radios

2022 IEEE RADIO AND WIRELESS SYMPOSIUM (RWS), pp. 156–159.

By: K. Du n, O. Mujumdar n, O. Ozdemir n, E. Ozturk n, I. Guvenc n, M. Sichitiu n, H. Dai n, A. Bhuyan*

author keywords: 60 GHz; AERPAW; channel sounding measurements; delay spread; drone; LOS; mmWave; MPCs; path loss
TL;DR: This work 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). (via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities (Web of Science; OpenAlex)
Sources: Web Of Science, ORCID
Added: June 13, 2022

2022 article

Indoor Propagation Measurements with Transparent Reflectors at 28/39/120/144 GHz

2022 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS WORKSHOPS (ICC WORKSHOPS), pp. 1118–1123.

By: C. Anjinappa n, A. Ganesh n, O. Ozdemir n, K. Ridenour n, W. Khawaja n, I. Guvenc n, H. Nomoto*, Y. Ide*

author keywords: 6G; B5G; Indoor coverage; mmWave; non-line-of-sight (NLOS); Sub-THz; Transparent reflectors
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities (Web of Science; OpenAlex)
Sources: Web Of Science, ORCID
Added: September 26, 2022

2022 article

National Radio Dynamic Zone Concept with Autonomous Aerial and Ground Spectrum Sensors

2022 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS WORKSHOPS (ICC WORKSHOPS), pp. 687–692.

By: S. Maeng n, I. Guvenc n, M. Sichitiu n, B. Floyd n, R. Dutta n, T. Zajkowski n, O. Ozdemir n, M. Mushi n

author keywords: Index Words; 5G; cellular drone; mmWave; spectral efficiency; wireless security; NRDZ.
TL;DR: This paper elaborate on key characteristics and features of an NRDZ to enable advanced wireless experimentation while also coexisting with licensed users and some preliminary results based on simulation and experimental evaluations are provided on out-of-zone leakage monitoring and real-time REMs. (via Semantic Scholar)
Sources: Web Of Science, ORCID
Added: September 26, 2022

2022 article

Out-of-Zone Signal Leakage Sensing in Radio Dynamic Zones

IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC 2022), pp. 5579–5584.

By: S. Maeng n, I. Guvenc n, M. Sichitiu n & O. Ozdemir n

author keywords: Correlated shadowing; estimation; interpolation; Kriging; national radio dynamic zone (NRDZ)
TL;DR: This paper introduces a spectrum monitoring concept for OoZ signal leakage detection at RDZs, where sensor nodes (SNs) are installed at the boundary of an RDZ and monitor the power leakage from multiple transmitters within the RDZ. (via Semantic Scholar)
Sources: Web Of Science, ORCID
Added: December 12, 2022

2022 article

Ray Tracing Analysis of Sub-6 GHz and mmWave Indoor Coverage with Reflecting Surfaces

2022 IEEE RADIO AND WIRELESS SYMPOSIUM (RWS), pp. 160–163.

By: E. Ozturk n, F. Erden n, K. Du n, C. Anjinappa n, O. Ozdemir n & I. Guvenc n

author keywords: 28 GHz; 60 GHz; indoor propagation; mmWave; ray tracing; reflecting surfaces
TL;DR: The results showed that ray tracing solutions are consistent with theoretical calculations, and using reflective walls significantly improves average received power and connectivity at mmWave bands, e.g., for the given floor plan, coverage increases from 86% to 97.5% at 60 GHz band. (via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities (OpenAlex)
Sources: Web Of Science, ORCID
Added: June 13, 2022

2021 article

28 GHz Indoor and Outdoor Propagation Measurements and Analysis at a Regional Airport

2021 IEEE 32ND ANNUAL INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS (PIMRC).

By: K. Du n, O. Ozdemir n, F. Erden n & I. Guvenc n

author keywords: 28 GHz; mmWave; LOS; NLOS; propagation channel measurement; multipath components; signal coverage
TL;DR: Results on LOS propagation, reflection, penetration, signal coverage, and multipath components (MPCs) show a lower indoor FSPL, a richer scattering, and a better coverage compared to outdoor, while high indoor-to-outdoor propagation losses are observed. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID
Added: May 23, 2022

2021 article

A Taxonomy and Survey on Experimentation Scenarios for Aerial Advanced Wireless Testbed Platforms

2021 IEEE AEROSPACE CONFERENCE (AEROCONF 2021).

By: M. Chowdhury n, C. Anjinappa n, I. Guvenc n, M. Sichitiu n, O. Ozdemir n, U. Bhattacherjee n, R. Dutta n, V. Marojevic*, B. Floyd n

Contributors: M. Chowdhury n, C. Anjinappa n, I. Guvenc n, M. Sichitiu n, O. Ozdemir n, U. Bhattacherjee n, R. Dutta n, V. Marojevic*, B. Floyd n

TL;DR: A brief overview of large-scale advanced wireless experimentation platforms broadly available to the wireless research community, including also the Aerial Experimentation and Research Platform for Advanced Wireless (AERPAW). (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID
Added: September 13, 2021

2021 journal article

AERPAW emulation overview and preliminary performance evaluation

COMPUTER NETWORKS, 194.

By: A. Panicker n, O. Ozdemir n, M. Sichitiu n, I. Guvenc n, R. Dutta n, V. Marojevic*, B. Floyd n

Contributors: A. Panicker n, O. Ozdemir n, M. Sichitiu n, I. Guvenc n, R. Dutta n, V. Marojevic*, B. Floyd n

author keywords: AERPAW; Emulation; UAV
TL;DR: This paper first presents the emulation design of AERPAW vehicles, then describes various different options for wireless channel emulation in AerPAW, and starts with a generalized model for wireless emulation, and expands that model to packet-level emulation, I-Q level emulator, and radio-frequency (RF)-level emulation. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID
Added: April 21, 2021

2021 journal article

Attenuation of Several Common Building Materials: Millimeter-Wave Frequency Bands 28, 73, and 91 GHz

IEEE ANTENNAS AND PROPAGATION MAGAZINE, 63(6), 40–50.

By: N. Hosseini*, M. Khatun*, C. Guo*, K. Du n, O. Ozdemir n, D. Matolak*, I. Guvenc n, H. Mehrpouyan*

author keywords: Attenuation; Antenna measurements; Loss measurement; Antennas; Frequency measurement; Building materials; Attenuation measurement; Millimeter wave measurements
TL;DR: A collaborative measurement campaign is reported on to find the attenuation of several typical building materials in three potential mm-wave bands (28, 73, and 91 GHz) using directional antennas and averaged out residual small-scale fading effects. (via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities (OpenAlex)
Sources: Web Of Science, ORCID
Added: January 6, 2021

2021 journal article

Channel Prediction for mmWave Ground-to-Air Propagation Under Blockage

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, 20(8), 1364–1368.

By: W. Khawaja*, O. Ozdemir n & I. Guvenc n

author keywords: Trajectory; Unmanned aerial vehicles; Predictive models; Azimuth; Receivers; Prediction algorithms; Forecasting; Blockage; channel prediction; millimeter wave (mmWave); unmanned aerial vehicle (UAV)
TL;DR: A novel method of channel prediction during the GA link blockage at 28 GHz is provided, and results obtained from ray-tracing simulations indicate a close match between the actual and the predicted mmWave channel. (via Semantic Scholar)
Sources: Web Of Science, ORCID
Added: August 16, 2021

2021 article

Sub-Terahertz and mmWave Penetration Loss Measurements for Indoor Environments

2021 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS WORKSHOPS (ICC WORKSHOPS).

By: K. Du n, O. Ozdemir n, F. Erden n & I. Guvenc n

author keywords: Attenuation; channel sounding; millimeter wave (mmWave); NLOS; penetration loss; sub-terahertz
TL;DR: This work 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 and found that the penetration lost and attenuation increased with frequency for all the tested materials. (via Semantic Scholar)
Sources: Web Of Science, ORCID
Added: October 24, 2022

2020 article

A Framework for Developing Algorithms for Estimating Propagation Parameters from Measurements

2020 IEEE GLOBECOM WORKSHOPS (GC WKSHPS).

By: A. Sayeed, P. Vouras*, C. Gentile*, A. Weiss n, J. Quimby*, Z. Cheng*, B. Modad*, Y. Zhang* ...

TL;DR: The results indicate that the simple greedy-LS algorithm has the ability to extract MPCs over a large dynamic range, and suggest several avenues for further performance improvement through extensions of the greedy- LS algorithm as well as by incorporating features of other algorithms, such as SAGE and RIMAX. (via Semantic Scholar)
Sources: Web Of Science, ORCID
Added: July 12, 2021

2020 journal article

Correction of Channel Sounding Clock Drift and Antenna Rotation Effects for mmWave Angular Profile Measurements

IEEE OPEN JOURNAL OF ANTENNAS AND PROPAGATION, 1, 71–87.

By: F. Erden n, O. Ozdemir n, W. Khawaja n & I. Guvenc n

author keywords: 28 GHz; channel sounding; clock drift; Hungarian algorithm; millimeter-wave (mmWave); multipath component (MPC)
TL;DR: This paper proposes an algorithm to correct the clock drift and MPC delay errors due to the rotation of the antennas and compares the MPCs from the SICL measurement and the corrected SECL measurements using a Hungarian algorithm based MPC matching method. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, ORCID
Added: November 24, 2019

2020 journal article

Coverage Enhancement for NLOS mmWave Links Using Passive Reflectors

IEEE OPEN JOURNAL OF THE COMMUNICATIONS SOCIETY, 1, 263–281.

By: W. Khawaja*, O. Ozdemir n, Y. Yapici n, F. Erden n & I. Guvenc n

author keywords: Coverage; indoor; mmWave; non-line-of-sight (NLOS); outdoor; PXI; ray tracing (RT); reflector
TL;DR: This work provides an analytical model for the end-to-end received power in an NLOS scenario using reflectors of different shapes and sizes and shows that the reflected received power for the NLOS link is the same as line-of-sight (LOS) free space received power of the same link distance. (via Semantic Scholar)
Sources: Web Of Science, ORCID
Added: November 24, 2019

2020 journal article

Detection and Classification of UAVs Using RF Fingerprints in the Presence of Wi-Fi and Bluetooth Interference

IEEE OPEN JOURNAL OF THE COMMUNICATIONS SOCIETY, 1, 60–76.

By: M. Ezuma n, F. Erden n, C. Anjinappa n, O. Ozdemir n & I. Guvenc n

author keywords: Interference; machine learning; Markov models; RF fingerprinting; unmanned aerial vehicles (UAVs); UAV detection and classification
TL;DR: 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 frequency (RF) surveillance system and investigates the performance of the NCA and five different ML classifiers for 15 different types of UAV controllers. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, ORCID
Added: January 2, 2020

2020 journal article

Methodology for Benchmarking Radio-Frequency Channel Sounders Through a System Model

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, 19(10), 6504–6519.

By: C. Gentile*, A. Molisch*, J. Chuang*, D. Michelson*, A. Bodi*, A. Bhardwaj*, O. Ozdemir n, W. Khawaja n ...

author keywords: Antenna measurements; Calibration; Wireless communication; Standards; Benchmark testing; Antenna arrays; Channel models; Antenna; measurement; propagation; cross-validation; millimeter-wave; mmWave
TL;DR: This paper proposes an alternative methodology – which is both practical and reliable – based on a mathematical system model to represent the channel sounder that is applied to a ground-truth channel response that is identical for all systems. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID
Added: November 2, 2020

2020 journal article

Multiple ray received power modelling for mmWave indoor and outdoor scenarios

IET MICROWAVES ANTENNAS & PROPAGATION, 14(14), 1825–1836.

By: W. Khawaja n, O. Ozdemir n, F. Erden n, E. Ozturk n & I. Guvenc n

author keywords: indoor radio; array signal processing; ray tracing; millimetre wave propagation; directive antennas; 5G mobile communication; millimetre wave antennas; multipath channels; mmWave indoor scenarios; millimetre-wave frequency bands; fifth generation networks; mmWave frequencies; high gain antennas; beamforming mechanisms; mmWave end-to-end propagation; individual ray sources; radiation patterns; outdoor open area; dominant rays; radiation pattern; path loss; multipath components; indoor corridor scenarios; lower gain antennas; multiple ray received power modelling; mmWave outdoor scenarios
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities (OpenAlex)
Sources: Web Of Science, ORCID
Added: December 21, 2020

2020 journal article

Ultra-Wideband Air-to-Ground Propagation Channel Characterization in an Open Area

IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS, 56(6), 4533–4555.

By: W. Khawaja n, O. Ozdemir n, F. Erden n, I. Guvenc n & D. Matolak*

author keywords: Antenna measurements; Receiving antennas; Ultra wideband antennas; Antenna radiation patterns; Loss measurement; Area measurement; Air-to-ground  (AG); channel model; drone; multipath channel; path loss; propagation measurements; ultra-wideband  (UWB); unmanned-aerial-vehicle  (UAV)
TL;DR: The Saleh–Valenzuela model was found to provide a good fit for the statistical channel model and an analytical path loss model based on antenna gains in the elevation plane is provided for unobstructed UAV hovering and moving (in a circular path) propagation scenarios. (via Semantic Scholar)
Sources: Web Of Science, ORCID
Added: January 4, 2021

2019 journal article

Joint Frame Synchronization and Channel Estimation: Sparse Recovery Approach and USRP Implementation

IEEE ACCESS, 7, 39041–39053.

By: O. Ozdemir n, C. Anjinappa n, R. Hamila*, N. Al-Dhahir* & I. Guvenc n

author keywords: Equalization; frame synchronization; large delay spread; MSE; OMP; software defined radio (SDR); sparse channel estimation; sparse recovery; USRP; vehicular communications
TL;DR: This paper proposes several JFSCE methods using popular sparse signal recovery algorithms which exploit the sparsity of the combined channel vector and the sparse channel vector estimate is used to design a sparse equalizer. (via Semantic Scholar)
Sources: Web Of Science, ORCID
Added: April 22, 2019

2018 journal article

A regularization approach to MSE analysis of OFDM under phase noise

AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS, 83, 303–308.

By: O. Kaksi*, O. Ozdemir n, R. Hamila* & N. Al-Dhahir*

author keywords: OFDM; Phase noise; NMSE
TL;DR: An exact normalized mean square error (NMSE) expression is derived under receive-side PN and an optimized regularization parameter for an MMSE equalizer design is derived and shown to result in appreciable NMSE reduction. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2017 conference paper

UAV air-to-ground channel characterization for mmWave systems

2017 ieee 86th vehicular technology conference (vtc-fall).

By: W. Khawaja n, O. Ozdemir n & I. Guvenc n

TL;DR: The characterization of mmWave air-to-ground (AG) channels for unmanned aerial vehicle (UAV) communications is studied and details of a universal serial radio peripheral (USRP) based channel sounder that can be used for AG channel measurements for mmWave (60 GHz) UAV communications are presented. (via Semantic Scholar)
Sources: NC State University Libraries, ORCID
Added: August 6, 2018

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