An indoor positioning system based on global positioning system

Orhan, Oğuzhan (2013) An indoor positioning system based on global positioning system. [Thesis]

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GPS (Global Positioning System) has great demand in recent years and the use of GPS has increased widely in many areas like transportation, tracking, navigation, as well as being implemented in almost all of the smart phones for location based services to improve the quality of our daily life. GPS system communicates with the satellites which send the GPS signals to the earth to be able to provide needed information to the GPS receivers. GPS signals that reach to the earth is in low power and GPS receivers evaluate the position with respect to information in the signal. This position evaluation can be done with the error of 2.5 meters in today's technology. Despite this system is successful in outdoor areas, it is not so successful in indoor areas. Decoding GPS signals in the indoor areas is hard due to additional loss in the GPS signal because of interaction of the signals with physical obstacles. There is a need for increasing coverage of GPS signals in indoor areas like tunnels, undersea and buildings. In this thesis, an indoor positioning system based on GPS infrastructure is proposed and designed. Designed indoor positioning system consists of directional GPS antennas, downconverters, upconverter and IF antennas. For realizing the system, downconverters, upconverter and IF antenna are designed, manufactured and measured. The experiments show that indoor positioning can be done with our designed system by adding some hardware and updating in positioning algorithm to the conventional GPS receivers.
Item Type: Thesis
Uncontrolled Keywords: GPS. Indoor positioning. -- Down-converter. -- Up-converter. -- Directional GPS antenna. -- 433 MHz IF antenna. -- GPS. İç mekan konumlandırma. -- Frekans düşürücü. -- Frekans Yükseltici. -- Yönlü GPS Anteni. -- 433MHz IF anten.
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7800-8360 Electronics
Divisions: Faculty of Engineering and Natural Sciences > Academic programs > Electronics
Faculty of Engineering and Natural Sciences
Depositing User: IC-Cataloging
Date Deposited: 01 Nov 2017 16:21
Last Modified: 26 Apr 2022 10:12

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