The Simulation For Multiple Antenna Space-Time GPS Data

The Global Positioning System (GPS) has developed rapidly and has found wide application in recent 10 years. Its'application involves not only navigation, but also high accuracy positioning, timing, and weapon guidance, etc. It played an important role in the Gulf Ware. With its application expanded, more positioning accuracy is desired urgently.The GPS signal is very weak, so it can be interfered easily. The conventional interference mitigation methods are all in the temporal domain. The GPS signal has the characteristics both in temporal domain and spatial domain. Space-time adaptive processing can suppress the jamming not only in the temporal domain, but also in the spatial domain. In order to evaluate the performance of various kinds of STAP algorithms, and to develop the novel STAP algorithms, we set up the space-time array GPS data simulation platform in this thesis. This thesis presents not only a simulation method for the Navigation data, C/A code, and the single antenna GPS data, but also the mathematical model of multiple antenna space-time GPS data, based on which the multiple antenna space-time GPS signal and some jamming are simulated. Besides, a simulation method for jamming provided the statistical characteristics were known is introduced, and a method for initial values selecting is proposed. The simulated data is processed by the Minimum-Power adaptive algorithm. The experiment result shows that the simulated data is of high fidelity.