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 10 of 10 for “"position determination"”.
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Hybrid framework for dynamic position determination in multisensor environments
… services. Existing technologies for position determination are ill suited in terms of interoperability and heterogeneity. Furthermore, they rely either on vast and often expensive infrastructures to perform the position estimation or alternatively the mobile device is burdened with …
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Data Fusion For Improved TOA/TDOA Position Determination in Wireless Systems
… providers must select a method 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 …
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A methodology for state determination without prior information using X-ray pulsar navigation systems
… rapidly spinning stars called pulsars, enable determination of spacecraft position, velocity, and attitude states. Due to the short period of pulsar signals, X-ray pulsar based navigation (XNAV), may result in position ambiguity within the Solar System and typically requires an initial position …
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Digital Signal Processing for segmented HPGe Detectors, Preprocessing Algorithms and Pulse Shape Analysis
… analysis algorithms to determine the interaction position of gamm-rays were implemented on a Digital Signal Processor and validated in an experiment using a collimated gamma-ray source. Emphasis was placed on the properties of the different digital signal processing algorithms, the consequences …
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Radiolocation using AM broadcast signals
… ambiguity problem by requiring that the initial position of the rover be known and that phase variations be tracked without interruption. I designed and implemented an ambiguity-function method that enables the phase ambiguity to be resolved instantaneously without position initialization or …
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Analysis of atmospheric delays and asymmetric positioning errors in the global positioning system
… of the limiting factors in the accuracy of GPS position determination. In regions with uneven topography, atmospheric delay phenomena can be especially complicated. Current delay models used in analyzing GPS data from the Plate Boundary Observatory (PBO) are successful in achieving …
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Characterization of the Multipath Environment of Ionospheric Scintillation Receivers
… (GNSS) are used to provide information on position, time and velocity all over the world at any time of the day. Currently there are four operational GNSS and one of them is GPS (Global Positioning System) that is developed and maintained by U.S Department of Defence (DoD), which is widely …
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Analysis of the optical coupling of wavelength-shifting fibers to organic liquid scintillator filled fluoropolymer tubes for industrial and nuclear security applications
… to handle nuclear devices is limited making this determination a critical step in properly responding to the situation. The detector module consists of a 5 mm diameter by 2-meter long fluoropolymer tube filled with organic liquid scintillator (OLS), optically read-out using wavelength shifting …
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Predicting Soil Erosion on Off-Road Vehicle Trails in Southwest Missouri
… orientation, depth to bedrock, and hillslope position position were recorded at each site and were entered into the linear regression analysis as the X-variable. There was no significant statistical correlation with average depth of trail and each of the physical variables. Quartile boxplots …
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Mehrwegeausbreitung bei GNSS-gestützter Positionsbestimmung
GNSS-Messungen werden neben systembedingten Fehlereinflüssen vor allem von den Auswirkungen der Mehrwegeausbreitung und Signalbeugung insbesondere in der Empfangsumgebung dominiert. Verschiedene Dienste z.B. der Landesvermessungsämter haben deshalb ein primäres Interesse daran, die Auswirkungen der …