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 448 for “"Positioning System"”.
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WiFiPoz -- an accurate indoor positioning system
… to the innovative concept of an indoor positioning system. By analyzing different technologies and algorithms, this thesis concluded that, considering a trade-off between accuracy and cost, a Wi-Fi based Fingerprint method is proved to be the most promising approach to determine the …
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Long Basline Ranging Acoustic Positioning System
… acoustic communication and localization system was developed for the Virginia Tech Underwater Glider (VTUG). Autonomous underwater vehicles, much like terrestrial and aerial robots require an effective positioning system, like GPS to perform a wide variety of guidance, navigation and …
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SH-3 helicopter/global positioning system integration analysis
The Global Positioning System (GPS) , the transmitted navigational signal, and the overall acquisition approach are explained. Navigational receiver components are functionally described and the hierarchy of platform integration and capability is discussed. Specifically explored is the integration …
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An optical positioning system for the Nano-Walker
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2000.
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Interferometric attitude determination using the global positioning system
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1981.
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New positioning system for the CSL Robotics Laboratory Testbed
A new positioning system is proposed for the B16 Robotics Laboratory testbed. The system is vision based and distributed. Each mobile agent is responsible for solving its individual positioning problem. The modified algorithm implements detection and identification techniques for position markers, …
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Sensing atmospheric water vapour using the global positioning system
… waves is the principal observable in the Global Positioning System (GPS). Accurate estimates of the delays experienced by the radio signals travelling from the satellites to ground-based receivers are made during the post-processing of GPS observations. In combination with meteorological …
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A phase measurement radio positioning system for indoor use
… 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 from asset …
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Establishing a relative positioning system to achieve mobile localization
… To combat this, I propose a relative positioning system between digital devices in order for each device to learn the relative locations of nearby devices. I explore three separate methods of establishing this positioning system. The first uses ultrasonic range-finding to localize …
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Fast Chirped Signals for a TDMA Ultrasonic Indoor Positioning System
… this paper, a new concept for ultrasonic indoor positioning based on instantaneous frequency of ultrasonic signals is presented. Nonlinear phase characteristics of ultrasonic transducers introduce a frequency deviation in ultrasonic signals. By sweeping at very fast rates, a large spike in the …
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High-accuracy, speed-optimized positioning system for electron beam lithography
Thesis: M.S., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 1982
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A two axis mirror positioning system with quadrature encoder output
… of a low cost, two axis rotational drive system with a resolution of one degree or better. The scope of this project was to design and build a two axis drive system capable of supporting a 20" square acrylic mirror. Cost, reliability, and the ability to be built by students using student …
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A novel positioning system for accurate tracking in indoor environments
Precise positioning is crucial to many applications involving autonomous robots in indoor environments. Current solutions to the indoor localization problem are either both highly unreliable and inaccurate (like GPS based systems), or hugely expensive (such as the iGPS system). In this thesis we …
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Global positioning system measurement of crustal deformation in central California
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1992.
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CMOS VLSI implementation of the Quick Look Global Positioning System
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1992.
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Atomic Clock Augmentation For Receivers Using the Global Positioning System
For receivers using the Global Positioning System (GPS), it is standard procedure to treat the receiver clock bias from GPS time as an unknown. This requires four range measurements to the satellites in order to solve for three dimensional position and clock offset. If the receiver clock could be …
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Development of a vision-based local positioning system for weed detection
… an autonomous weed scout, a vision-based local positioning system for weed detection has been developed and tested in a laboratory setting. Four Line-detection algorithms have been tested and a robotic positioning device, or XYZtheta-table, was developed and tested. The Line-detection algorithms …
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Optimal control of positioning system with non-linear rate-type drive.
Thesis: Mech. E., Massachusetts Institute of Technology, Department of Mechanical Engineering, 1970
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Canopy, terrain, and distance effects on Global Positioning System position accuracy
… the realizable accuracies of the Global Positioning System for natural resource conditions. The effects of terrain, forest canopy, number of consecutive position fixes, and PDOP on accuracy were evaluated. Position accuracies were determined for a total of 27 sites: three replicate sites …
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