In order to solve the problem of positioning errors caused by spoofing to the satellite navigation signals

a spoofing detection and elimination method based on antenna array is proposed. The carrier phase double difference measurement value of the receiving antenna array is used as the basis for interference detection. The direction vector of the spoofing is obtained by the single difference measurement value of the carrier phase. A method for improving the precision of the spoofing's direction is proposed too. The orthogonal vector is used to form a nulling in the direction of spoofing. By adjusting the beam direction

the array gain is formed in the direction of the signal to be measured

so as to achieve the purpose of resisting interference and enhancing the navigation signal at the same time. Using this method can effectively identify and eliminate the spoofing in the navigation signal

which is suitable for aircraft navigation in complex environment.