Gps Anti-jamming System Design And Realization

Satellite communication is developing quickly since human used wireless communication. Now, the growth rate of communication is beyond people's imagination. IN the past years, GPS satellite navigator and mobile phone is very popular based on development of satellite communication, people's lives were changed by which. Satellite communication covers entire world, which provides 24-hour and large amount of information's services, and make a significant contribution to people's lives and national defense. However, satellite signal is so weak that it is susceptible to interference. In response to this features of satellite signal, it is very important that how to construct a complete anti-jamming program, to find a efficient, stable and economy method, and to develop the product that can be stable work in complicated electromagnetic environment.As the background of satellite navigation receiver platform, anti-jamming nulling antenna system of GPS and other satellite navigation technology are analyzed as well. Associating with algorithm of nulling antenna technology, and the structure of anti-jamming theory, anti-jamming system platform is implemented.This dissertation briefly introduces the background and significance of this project in foreword. Subsequently this dissertation analyses the basic composition, especially the structure of GPS, anti-jamming theory, array antenna and some algorithm related.According to the test background of anti-jamming, analysis the needs of anti-jamming of GPS. Framework of interference suppression platform is established according to the anti-jamming principle. According to framework, overall RF circuit and digital hardware is designed.In this dissertation, the platform is partitioned into different modules by different functions, and their relationships are described. At last, implement of anti-jamming nulling antenna system is discussed in detail, and give an application example of how to test this system platform of anti-jamming. Our anti-jamming nulling antenna system has passed the function check successfully and it has many advantages, such as reducing economic waste as the replacement, increasing anti-jamming efficiency. It is proved that the anti-jamming system is valuable.