An indoor positioning system based on global positioning system: design, implementation and analysis
Özsoy, Kerem (2009) An indoor positioning system based on global positioning system: design, implementation and analysis. [Thesis]
Official URL: http://192.168.1.20/record=b1301345 (Table of Contents)
Civil Global Positioning System (GPS) has become very popular in recent years and it has widespread use in many areas such as traffic management, medical emergency services and location finding in wireless handsets. Owing to the latest technological advances, GPS receivers are able to locate themselves with an error of 5 meters outdoors. Although GPS positioning is very successful in outdoor areas, it is hard to decode GPS signals indoors due to the additional signal loss caused by the buildings and walls. In this thesis, in order to solve indoor coverage problem, an indoor positioning system based on GPS infrastructure is proposed, designed and analyzed. Designed indoor positioning system consists of GPS repeaters and a GPS receiver with improved positioning algorithms. In order to analyze the proposed indoor positioning system, directional GPS antenna, GPS repeater with amplifiers is designed, manufactured and measured. Positioning algorithms are implemented and operated real time on live GPS data. All the system components are integrated and positioning is obtained for evaluation of the system performance. Results of the experiments show that the proposed system can be used for indoor positioning thus continuation of the GPS service can be expanded to indoors with a hardware addition to the buildings and a software update to the standard GPS receivers where indoor coverage is needed.
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