Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 78 for “"Time-of-Arrival"”.
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Time-of-Arrival Emitter Location
No abstract prepared.
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The Effect of Periodicity Instability on the Detection of Interaural Time-of-Arrival Difference
<p>No abstract provided.</p>
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Underwater Localization and Tracking of Physical Systems
<p>In this paper, we investigate the problem of localizing an underwater sensor node basedon message broadcasting from multiple surface nodes. With the time-of-arrival measurementsfrom a DSP-based multicarrier modem, each sensor node localizes itself based on the traveltime differences among …
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Topics in quantum physics: Schrodinger's cat problem - time measurement accuracies in quantum mechanics
… the problem. In the second part, I discuss the time measurement related issues in quantum mechanics. Since there does not exist any time operator in quantum mechanics generally, time is not directly measurable. Therefore we should devise other methods to register time. We study different …
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A planned approach to high collision risk area
This thesis examines the transition of a vessel from the open ocean, where collisions are rare, to a high risk and heavy traffic area such as a Traffic Separation Scheme (TSS). Previous autonomy approaches generally view path planning and collision avoidance as two separate functions, i.e. a vessel …
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A planned approach to high collision risk area
This thesis examines the transition of a vessel from the open ocean, where collisions are rare, to a high risk and heavy traffic area such as a Traffic Separation Scheme (TSS). Previous autonomy approaches generally view path planning and collision avoidance as two separate functions, i.e. a vessel …
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Simulation of a binary phase shift keyed receiver with an IF correlator for position location
This thesis conducts a feasibility study of using a binary phase shift keyed receiver with an IF correlator in a position location application. The feasibility study is done using mathematical simulation. Traditionally the correlator, in a binary phase shift keyed receiver, is placed after the data …
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Trajectory Specification to Support High-Throughput Continuous Descent Approaches
… to improve the predictability and throughput of aircraft flows. Prior work has recognized the difficulty of implementing CDAs in high-density terminal areas due to an increase in uncertainty, which can result in a decrease in throughput. This thesis investigates whether increased throughput …
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Fundamental limits of wideband localization
… we investigate the localization performance of wideband networks and proposed a performance measure called the squared position error bound (SPEB) to characterize the localization accuracy. We derive the SPEB succinctly by applying the notion of equivalent Fisher information (EFI). The EFI …
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Two-Sensor Synthetic Aperture Geolocation Techniques
… geolocation data. A primary limiting factor of the growth of geolocation systems is the stringent physical resource requirements needed for existing geolocation algorithms. Popular geolocation algorithms measure the time-of-arrival, time-difference-of-arrival, and …
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Neural Network Detection of Fatigue Crack Growth in Riveted Joints Using Acoustic Emission
<p>The purpose of this research was to demonstrate the capability of neural networks to discriminate between individual acoustic emission (AE) signals originating from crack growth and rivet rubbing (fretting) in aluminum lap joints. AE waveforms were recorded during tensile fatigue cycling of six …
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Locating Unmanned Aerial Vehicles (UAVs)
<p>Despite the popularity and usefulness of Unmanned Aerial Vehicles (UAVs) or drones, they are not allowed to fly in some areas without prior permission from the Federal Aviation Administration (FAA). However, many incidents of UAVs breaching such restrictions have been reported. A UAV location …
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Distributed Method to Optimal Profile Descent
Current ground automation tools for Optimal Profile Descent (OPD) procedures utilize path stretching and speed profile change to maintain proper merging and spacing requirements at high traffic terminal area. However, low predictability of aircraft's vertical profile and path deviation during …
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De-interleaving of Radar Pulses for EW Receivers with an ELINT Application
… for efficient data collection and for support of operational decisions. This dissertation proposed a de-interleaving solution for use with ELINT/Electronic-Support-Measures (ESM) receivers for purposes of ELINT with on-line application. The proposed solution does not require complex integration …
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Antenna Array Systems: Propagation and Performance
… performance gains associated with the use of antenna arrays in wireless networks, it is inevitable that these technologies will become an integral part of future systems. This report focuses on signal propagation modeling for antenna array systems and on its relationship to the performance …
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Localization and tracking of high-speed trains using compressed sensing based 5G localization algorithms
… are in place for the localization and tracking of High Speed Trains. These methods tend to perform poorly under certain conditions. Localization using 5G infrastructure has been considered as an alternative solution for the positioning of trains in previous studies. However, these studies only …
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Analysis of the Position-Dependent Error in FTM RTT Indoor Navigation
Fine time measurement (FTM) of the round-trip time (RTT) of a signal between an initiator (smartphone) and a responder (Wi-Fi access point) provides a promising method for indoor positioning. Accurate indoor positioning is a requirement for a wide range of applications, such as asset tracking, …
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