Abstract:

The space time adaptive processing algorithm can enhance the antijamming performance of global positioning system receivers. Through the analysis of the uniform linear array and the uniform circular array, when the strong interference signal is perpendicular to the antenna array plane, the received signal covariance matrix becomes singular and directly induce the difficulty in calculating the optimal weights, the strong interference signal on the specific direction cannot therefore be suppressed. In order to avoid such a situation and reducing the antenna coplanar condition, a double tetrahedron array which is of a threedimensional array structure with seven antenna elements is constructed. The simulation results show that, the new array can not only mitigate the interference under different extreme scenarios, but also achieve better antenna pattern and capture performance.