Research on Anti-jamming algorithm and performance of array antenna

The GNSS technology has found an increasingly wide utilization in all fields. However, the navigation signal is too weak and easy to be disturbed in practical application. The array antenna technology is considered to be a good solution to solve the problem. In this paper, three kinds of adaptive anti-jamming algorithms, including the Least Mean Square (LMS), Sample Matrix Inversion (SMI) and Power Inversion(PI), are researched respectively. On the basis of analyzing the working principle of these algorithms, the simulation analysis and test research on its anti-jamming performance are carried out. The results show that the SMI algorithm has a better performance in nulling depth, and the PI algorithm has a better flatness in low elevation. Among the three algorithms, the stability of the radiation pattern s are equivalent. The research results have a certain guiding significance for the study of array antenna technology and the selection of anti-jamming algorithms in the array antenna technology.