The Optimized Power Inversion Algorithm Applied in the Environment of Strong Interference and Weak Interference in Beidou Navigation System

Abstract

The Beidou satellite signal of Beidou navigation positioning system is constantly changing, receiving signal processing before a priori information is not easy to judge the satellite signal. Therefore, the choice of the received signal power inversion algorithm of interference suppression effect is good under the condition of the environment. However, under a weak interference signal, the power strength is similar to the navigation signal, terminal receiving antenna sank in the position of jamming signal form zero with the navigation signal of zero in the same. It can't be differentiated! Therefore, this paper adopts the idea of matrix decomposition to extract the sub-matrix eigenvector values of interference and noise respectively, and then the algorithm is optimized by the judgment processing of the matrix.  At the same time, the antenna adaptive interference power inversion method framework and process are designed, and the code was written and simulated with MATLAB software. The simulation results show that the optimization algorithm can eliminate the signal in the case of strong interference and weak interference.