| 内容提要: |
Conventional power inversion (PI) algorithm can reject jamming effectively, but has different influences on repeat spoofing when the different number of elements are used in an antenna array. Nevertheless, repeat spoofing still has the capability of deception after being processed by the PI algorithm. If the jamming is rejected by the PI algorithm firstly, the power of spoofing would be lower. In this case, it will be more difficult to distinguish the authentic signals and fake signals. Therefore, Independent component analysis is used to jamming mitigation, which cann't make effect on the spoofing. Then, parameter estimation method is used to distinguish the authentic signals and spoofing. The proposed method can reject the spoofing and jamming and form the high gain towards the authentic satellite signals. |