Satellite Positioning And Gps Interference Study

As GPS is used widely around the world, Satellite positioning technology is becoming a hot spot of satellite application technology. The paper is about satellite positioning and it's related technology. It is divided into three subaspects, which are: Doppler-Range positioning algorithm and the rule to select satellite; The constellation of a regional satellite navigation system; GPS interference technology. The paper include five chapters. chapter one and chapter four are the pivots.Chapter 1 is the preface, which concisely introduces the development of the satellite navigation,classification of satellite navigation system and GPS interference technology. The framework of this dissertation is also introduced at the end. Chapter 2 studies the Doppler-Range positioning algorithm and TDOA-TDOF positioning algorithm which are appropriate to LEO satellite constellation. The expressions of the positioning error is calculated, and a parameter which can be used to evaluate the performance of the mixed positioning algorithm is proposed. Based on the analysis of the isoline of the Doppler-Range algorithm and TDOA-TDOF algorithm, the rule to select positioning satellites is proposed. The results of simulation show that the rule will help reduction of the positioning error.Chapter 3 proposed a constellation scheme for a regional satellite navigation system. The constellation is consist of geosynchronous satellites and synchronous satellites with elliptical orbit. The parameter of the constellation has been optimized with the goal of minimizing GDOP. The simulation shows this scheme can meet the requirements in china and its neighboring area .Chapter 4 introduces the principle of GPS and its signal framework. The effect of the barrage jamming is studied from the point of view of BER. The BER expressions of different type jamming signal is calculated. The simulating model is built using ADS, through which the simulating result of different jamming type is obtained. The best barrage jamming type is known by the simulating. The effect of deception jamming is studied from the point of view of acquisition probability. A mixed jamming method is...