Browsing by Author "Metcalf, Justin"
Now showing items 1-20 of 24
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All-Weather Sense and Avoid (SAA) Radar Clutter Modeling and Control
Gilliam, Matthew (2020-12-18)The background of this thesis is related to the enhancement and optimization of the Pulsed-Doppler Radar sensor for the need of Detect and Avoid (DAA), or Sense and Avoid (SAA), for both weather and air-traffic (collision ... -
An analysis of the information content of radar detection
Crump, Trey (2022-08-04)The availability of the electromagnetic spectrum (EMS) was an unseen issue in the past, as there was sufficient spectrum access to suit the needs of its’ consumers. Today, the use of the EMS has been become integrated ... -
Application of Machine Learning to Multiple Radar Missions and Operations
Shrestha, Yunish (2022-08-04)This dissertation investigated the application of Machine Learning (ML) in multiple radar missions. With the increasing computational power and data availability, machine learning is becoming a convenient tool in developing ... -
Calibration and Clutter Cancellation Techniques for Accurate Wideband Radar Cross Section Measurements
Jarvis, Rachel (2021-05-14)The expected received power is a key design parameter when designing a radar system. The radar’s receiver must be sensitive enough to detect the object of interest without being saturated by the highest received power. The ... -
Deep Learning for Weak Target Detection in Range-Doppler Data
Dang, Bibi (2022-05)A consistent issue for detectors in radar systems is how to correctly distinguish target signals from random noise. This is especially true for weak targets with low signal-to-noise ratios (SNRs). Traditional target detection ... -
Evaluating the performance of methods for dual-function radar communications
Cole, Mikal (2022-12-16)Dual-Function Radar Communications (DFRC), where a radar and communications function is performed by the same antenna or array, has recently begun to be investigated as a means of alleviating or coping with spectrum ... -
External quality factor of antennas and their use in filtenna design
Bauer, Adrian (2022-05-13)Filtering antennas, or filtennas, have become a growing topic of interest in the pursuit of the minimization of the RF front end. Combining the filter and antenna, which are integral to RF front ends, allow for a decrease ... -
GPS disciplined RFSoC synchronization, timing, and performance characterization in bistatic radar systems
Ortiz-Cheek, Michael (2023-12-15)Distributed radar geometries offer multiple advantages over monostatic pulse-Doppler radar, but synchronizing frequency and timing for transmitting and receiving nodes in a distributed system is required to more accurately ... -
Implementation and Analysis of Adaptive Spectrum Sensing
Mattingly, Rylee (2021-08-05)The electromagnetic spectrum is a finite resource that has become increasingly crowded as the day-to-day operation of the world has become increasingly reliant on wireless devices. With the growing deployment of the ... -
The Intersection of Radar and Communications: A Study on Spectrum Management for Addressing RF Interference
Price, Jacob (2023-05-12)The radio frequency (RF) spectrum is a fruitful yet competitive frontier that enables technologies like 5G, Wi-Fi, Bluetooth, GPS, long-range telescopes, microwave ovens, radar, and more. With finite supply and increasing ... -
Investigation of a Generalized Frequency Domain Method for Modeling Time-Varying Loads on Antennas
Palmer, Ashley (2019-12-13)Within traditional antenna design, the behavior of the antenna can be dictated by its physical dimensions and their proportions to a wavelength. Traditional electrically small antennas in particular face many limitations ... -
Localization of tables and plots in documents using deep neural networks
Kadiyala, Vishnu Priyatamkumar (2022-05-13)There has been an immense increase in number of scientific publications being published every single day, it has been increasingly difficult to keep up with all the new results being published. In this research, we localized ... -
Machine learning for classifying biological radar echoes with S-band polarimetric radar
Jatau, Precious (2023-12-15)The S-band WSR-88D weather radar is sensitive enough to observe biological scatterers like birds and insects. However, their non-spherical shapes and frequent collocation in the radar resolution volume create challenges ... -
Non-LTI Antenna Design and Modeling Techniques
Bass, Stephen (2022-05-13)Nearly all contemporary antenna systems are Linear Time-Invariant (LTI) devices, and allow for assumptions of frequency independence and reciprocity, but are governed by strict bounds on their performance. Recently, nonlinear ... -
Nonlinear Amplifier Amplitude Modulation Distortion Mitigation Techniques
Carlton, Brian (2022-05-13)High peak-to-average power ratio (PAPR) waveforms present a challenge to radar systems in which high power amplifiers operate in saturation to increase power efficiency. Previous works have demonstrated a marked reduction ... -
Predictive Tracking Simulation and Techniques for All-digital Radar
Pate, Savannah (2021-08-05)All-digital radar architectures allow radar systems to operate with more flexibility. Multiple Input, Multiple Output (MIMO) radars are especially effective at identifying multiple targets. Combined with statistical ... -
Reinforcement Learning for Cognitive Phased Array Radar Surveillance
Flandermeyer, Shane (2023-05-12)The proliferation of phased array radar (PAR) has significantly increased the flexibility of radar systems, making it possible to use a single radar to perform a variety of operational modes such as surveillance and tracking ... -
SAR Image Formation via Subapertures and 2D Backprojection
Schone, Callin (2020-05-08)Radar imaging requires the use of wide bandwidth and a long coherent processing interval, resulting in range and Doppler migration throughout the observation period. This migration must be compensated in order to properly ... -
Signal Processing Techniques for Radar Cross Section Measurements Using Orthogonal Frequency-Division Multiplexing Waveforms
Glenn, Robert (2023-05-12)In recent work conducted at the University of Oklahoma’s Advanced Radar Research Center, it has been shown that using orthogonal frequency-division multiplexing (OFDM) offers a significant time reduction in taking wideband ... -
Techniques for Simultaneous Transmit and Receive with All-Digital Arrays
Vann, Heath (2021-05-14)The increased flexibility provided by all-digital array architectures allows for the development of improved techniques toward achieving multi-function capability. In an all-digital array, element-level control can be ...