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 8 of 8 for “"Radio navigation"”.
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Navigation using Radio-Frequency Observables from LEO Constellations with Possible Aiding from an Inertial Navigation System
Analyses are performed on the potential of using radio-frequency signals from massive LEO satellite constellations. This work aids in the creation of a navigation system independent of current GNSS. A tightly-coupled carrier Doppler shift/INS filter is developed to determine the feasibility of …
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Maximizing the Utility of Radio Spectrum: Broadband Spectrum Measurements and Occupancy Model for Use by Cognitive Radio
Radio spectrum is a vital national asset; proper management of this finite resource is essential to the operation and development of telecommunications, radio-navigation, radio astronomy, and passive remote sensing services. To maximize the utility of the radio spectrum, knowledge of its current …
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New Estimation Algorithms With Applications To Relative And Absolute Orbit Determination
… new estimation algorithms for the relative navigation of high-altitude spacecraft and for systems that have implicitly defined measurement times. The first two papers focus on the use of carrierphase differential GPS techniques with integer ambiguities to estimate the relative states of …
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A phase measurement radio positioning system for indoor use
… here the detailed design for a low frequency radio navigation system called the Building Positioning System (BPS). This system is designed to work indoors, where the microwave radio signals of the Global Positioning System (OPS) cannot be received. Potential applications for this system range …
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New sharing method between the Fixed Satellite Service and the Aeronautical Mobile Satellite Service in the 14.0-14.5 GHz band
… GHz band is allocated on a primary basis to the Radio-Navigation and the FSS with a secondary allocation to the LMSS. The Radio-Navigation service is the use of RADAR for navigation. An example of Radio-Navigation is the ground proximity radar used for airplane collision avoidance. FSS stands for …
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A subsampling delta-sigma modulator for global navigation satellite systems
Next-generation Global Navigation Satellite Systems (GNSS) receivers should be capable of processing multi-frequency signals in order to provide better positioning accuracy and signal availability to end-user. Nevertheless, the realization of such receivers with conventional receiver architectures …
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Adaptive Interference Mitigation in GPS Receivers
Satellite navigation systems (GNSS) are among the most complex radio-navigation systems, providing positioning, navigation, and timing (PNT) information. A growing number of public sector and commercial applications rely on the GNSS PNT service to support business growth, technical development, and …
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Remote measurement of ELF/VLF radio emissions by lightning and ground-based transmitters
… with low attenuation. Because of this, radio waves emitted in this frequency range can be measured at extremely large distances (thousands of kilometers) from the sources of such emissions. Two main sources of signals at these frequencies are lightning events and VLF transmitters …