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.
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Showing 1 to 18 of 18 for “"Time-of-Arrival (TOA)"”.
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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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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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Microphone Array Based Sound Source Detection and Localization with Beamforming, GCC-PHAT, and Triangulation using Arduino and MATLAB
… sound source localization (SSL). Keeping real-time applications in mind, such as search and rescue missions, military operations for gunshot detection, scream based localization, etc., it will help us understand how important sound localization is for people’s safety. This research adopts a …
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Terrestrial radio wave propagation at millimeter-wave frequencies
… measurement techniques are analyzed. Three types of measurement systems are designed, and implemented in measurement campaigns: a narrowband measurement system, a wideband measurement system based on Vector Network Analyzer, and sliding correlator systems at 5.8+AH4AXA-mbox{GHz}, …
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Joint Localization and Synchronization via User Cooperation in Non-Terrestrial Networks
… (NTN) with low Earth orbit (LEO) satellites offer a promising alternative for positioning, navigation, and timing (PNT) by providing diversity and increasing the signal-to-noise ratio (SNR) over global navigation satellite systems (GNSS). However, the primary challenge in NTNbased …
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Analysis of CDMA cellular radio systems employing adaptive antennas
This research investigates the performance of Code Division Multiple Access (CDMA) cellular communication systems employing adaptive antennas at the base station. First, a simple analysis is presented which shows that significant improvements in performance can be obtained by using directional …
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Localizatation estimation usign the technique of multi-sequence positioning
… etc. In addition, the geographic information of sensor nodes can be critical for improving network management, topology planning, packet routing and security. Although localization plays an important role in all those systems, itself is a challenging problem due to extremely limited resources …
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OLSR-based network discovery in situational awareness system for tactical MANETs
… high level design for connectivity visualization of OLSRbased MANET topology based on local topology databases available in an OLSR node. Two different scenarios are considered: a central (full view) topology from a command and control location, or a nodal (partial) view from an ad-hoc node. A …
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Relative distance perception of sound sources in critical listening environment via binaural reproduction
… distance cues are important in the degree of realism provided by virtual audio systems. In the last decade there has been an increased interest in this research area. The main focus of this research project is to investigate the effect of different acoustic cues related to distance …
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Data Fusion For Improved TOA/TDOA Position Determination in Wireless Systems
… for providing position location (PL) information of a user, requesting for E-911 service, by October 2000. The wireless 911 rules adopted by the FCC are aimed both for improving the reliability of the wireless 911 services and for providing the enhanced features generally available for wireline …
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Investigation of Indoor Propagation Algorithms for Localization Purposes: Simulation and Measurements of Indoor Propagation Algorithms for Localization Applications using Wall Correction Factors, Local Mean Power Estimation and Ray Tracing Validations
The objective of this work is to enhance the awareness of the indoor propagation behaviour, by a set of investigations including simulations and measurements. These investigations include indoor propagation behaviour, local mean power estimation, proposing new indoor path loss model and introducing …
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Bandwidth scaling behavior in wireless systems : theory, experimentation, and performance analysis
… wireless services has prompted the exploration of using increasingly larger transmission bandwidths often in environments with harsh propagation conditions. However, present analyses do not capture the behavior of systems in these channels as the bandwidth changes. This thesis: describes the …
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Ultrasound Testing System for the Detecting of the Shape and Growth of a Vapor Chamber in the VAPEX Process
… to estimate distances based on the measurement of the time of arrival (TOA) of an ultrasonic wave. It has been used in diagnoses and treatments in areas such as medicine, dentistry, civil engineering, and many other industrial applications. It has also been applied in the oil industry for …
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Multiple radar environment emission deinterleaving and PRI prediction
The aim of this study was to research TOA based tracking and deinterleaving algorithms suited to radar emitters in an EW environment for application on the CSIR 5th generation DRFM platform. The research problem statement stipulated that the only defining characteristic of the different emitters be …
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Optimal Indoor Positioning, Trajectory Reconstruction and Localisation with Uncertainty Control using Radio-Frequency Measurements
This thesis addresses the problem of target positioning and localization using Radio Frequency (RF) based measurements and using a variety of modulation including Time of Arrival (ToA), Phase of arrival (PoA) and Received Strength Indicator of RF signals (RSSI). Starting from finding the planar …
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Efficient localization methods for a point source and rigid body
… networks over the past few years. Localization of a signal source is often accomplished by using a number of sensors that measure the radiated signal from the source, here we consider the range based measurements, including time of arrival (TOA) and time difference of arrival (TDOA). In such …
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Statistical Analysis of Geolocation Fundamentals Using Stochastic Geometry
… past two decades have seen a surge in the number of applications requiring precise positioning data. Modern cellular networks offer many services based on the user's location, such as emergency services (e.g., E911), and emerging wireless sensor networks are being used in applications spanning …