Development of a test circuit for investigating the accuracy of GPS receivers

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Szalay Zoltán Attila
Department of Broadband Infocommunications and Electromagnetic Theory

The creation of this thesis is due the intense demand of satellite positioning system in the civil life. On 2nd May, 2000, the Government of the United States stopped the artificial interference in the GPS signals, called the selective ability, thus allowing anyone in the private sector to use the positioning based on satellites.

My task is the examination of the less precise but open global positioning system (GPS), and the analysis of its error possibilities. I also had in my project the measurement of accuracy of GPS receiver systems.

In my present study, I investigate the history and structure of satellite navigation, than I precisely detail the error possibilities hiding in the construction, and their resources. After these, I deal with the considerations of the hardware I designed, with the components I used, and the PCB I designed, and with the steps of manufacturing. Then, I write about the programming of the finished circuit,-the embedded and PC programming part- and the measurement process, I evaluate the outcome and compare them.


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