关键词: 干扰源定向, 粒子群算法, 多波束, 方向图

Abstract: An interference orientation method based on on-board multi-beam antenna is proposed for the GEO satellites. In this method, a mapping relationship between direction of interference and antenna gain is first established with the function of antenna pattern. After that, it establishes the equations about link calculation of interference signal with the mapping relationship, the information of beam direction and the intensity distribution of interference in multi-beams environment. And then the orientation of interference is obtained by solving the equations with the help of Particle Swarm Optimization（PSO）, comparing with the Maximum Likelihood. It has simulated the performance of the ground interference with the proposed method. The results show that this method is effective in determining the orientation of interference.

Key words: interference orientation, Particle Swarm Optimization（PSO）, multi-beam antenna, antenna pattern