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 20 of 29 for “"range estimation"”.
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Image Segmentation and Range Estimation Using a Moving-aperture Lens
… and to determine the locations in the scene (range estimation). Despite the decades of research, a single solution is yet to be found. Through our research we have demonstrated that a possible solution is to use moving aperture lens. This lens has the effect of introducing small, repeating …
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Error Analysis of Angle and Range Estimation in a Range Limited Antenna System Using Music and Modified Root Pisarenko Algorithms
The Range Limited Antenna (RLA) has the ability to track and pin-point RF devices operating within a certain accepted range. Using two antenna arrays, each made up of several elements, direction-finding algorithms such as MUSIC and Modified Root Pisarenko (MRP) are used to estimate the angles of …
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Signal Absorption-Based Range Estimator for Undersea Swarms
… or two-way communication to estimate ranges. The cost of Chip-scale Atomic Clocks (CSACs) and acoustic modems is limiting for large-scale swarms due to the cost-per-vehicle and communications structure. We propose a single vehicle with reliable navigation as a "leader" for a scalable …
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Non-Frontal Imaging Camera
Experimental results on panoramic range estimation and focused image acquisition are also presented.
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Efficient localization in a dispersive waveguide : applications in terrestrial continental shelves and on Europa
… source localization and environmental parameter estimation in seismo-acoustic waveguides by exploiting the dispersive behavior of guided wave propagation. The methods developed are applied to the terrestrial continental shelf environment and the Jovian icy satellite Europa. The thesis is composed …
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Intelligent energy efficient localisation in wireless sensor networks
… and does not require additional hardware for range estimation. The algorithm also provides control over localization granularity which makes it suitable for wide range of wireless sensor network and localization applications. Simulation results show that the algorithm gives good performance …
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Indoor positioning using modulated echo radio localization instrument (MERLIN)
… phase information of CW RF signals. Different range estimation methods are also discussed. Indoor positioning or localization is bound to become a popular feature in the next generation of wireless systems.
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COMPARATIVE BIOGEOGRAPHY OF NORTH AMERICAN PIKA PARASITES: UNRAVELING A HISTORY DRIVEN BY CLIMATE CHANGE
… was assessed using analyses of historical range estimation and tests for simultaneous divergence. Analysis results allow me reject the hypothesis that these parasites colonized the Nearctic during a single glacial cycle, as evidenced by multiple Nearctic and Palearctic lineage pairs that …
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Establishment of a Cyber-Physical Systems (CPS) Test Bed to Explore Traffic Collision Avoidance System (TCAS) Vulnerabilities to Cyber Attacks
… as possible low latency solutions to spoof TCAS range estimation. A TCAS test bed is established with commercial avionics to demonstrate the efficacy of proposed vulnerabilities. SDRs and Vector Waveform Generators (VWGs) are used to achieve desired latency. Sensor inputs to the TCAS system are …
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Extending the range of low SWaP-C FMCW radar
… automotive-grade radar chipsets for long-range sensing. These disruptive chipsets offer impressive performance at low size, weight, power, and cost (SWaP-C) that could benefit applications with tight SWaP-C budgets such as urban air mobility and urban air logistics. The short range of …
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Optimizing range aware localization in wireless sensor networks (WSNs)
… can be responded carefully. Among the range free and range aware localization, range aware localization has been the most promising for fine-grained accuracy. Range aware localization has two phases, ranging and localization. Location errors always exist no matter which ranging or …
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Omnidirectional Vision for an Autonomous Surface Vehicle
… we thoroughly investigate the performance of range estimation for our omnidirectional vision system, regarding to different omnidirectional stereo configurations and considering kinds of noise, for instance, disturbances in calibration, stereo configuration, and image processing. The result of …
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Approaches to Multiple-source Localization and Signal Classification
… at each sensor, and in some cases, range estimation as well. Both single and multiple-target scenarios are considered in this research. In single-source environments, a solution that outperforms the classic least squared error estimation technique by combining direction and range …
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Localizatation estimation usign the technique of multi-sequence positioning
… study is focusing on using a distribution-based estimation method. The reason for selecting this method because it is considered an energy saving effort comparing to costly centralized localization scheme. The scope of the estimation in localization of sensor nodes is a Multi-Sequence Positioning …
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StreetSmart : modeling vehicle fuel consumption with mobile phone sensor data through a participatory sensing framework
… road types. Mean prediction error for all cases ranged from -2.43% to 0.06% while the max prediction error was 7.85%. We have also developed a framework for the broader StreetSmart System, a participatory sensing network that will be used to crowdsource mass quantities of smartphone accelerometer …
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Design and theoretical analysis of advanced power based positioning in RF system
… The second paper improves the power-based range estimation accuracy by estimating the LoS component. The ranging error model in fading channel is derived. The third paper introduces the LoS-based positioning method with corresponding theoretical limits and error models. In the fourth and …
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Ambient acoustics as indicator of environmental change in the Beaufort Sea: experiments & methods for analysis
… generation to discrete generation at specific ranges. Motivated by our data analyses, the second component presents several tools to facilitate ambient noise characterization and generation monitoring. One is a convolutional neural network (CNN) approach to noise range estimation. Its …
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Ambient Acoustics as Indicator of Environmental Change in the Beaufort Sea: Experiments & Methods for Analysis
… generation to discrete generation at specific ranges. Motivated by our data analyses, the second component presents several tools to facilitate ambient noise characterization and generation monitoring. One is a convolutional neural network (CNN) approach to noise range estimation. Its …
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Understanding and utilizing waveguide invariant range-frequency striations in ocean acoustic waveguides
… (SSP), which limits their applicability. The range-frequency waveguide invariant describes striations that often appear in plots of acoustic intensity versus range and frequency. These range-frequency striations have properties that depend strongly on the frequency of the acoustic source and …
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