An effective nulls control method

The adaptive beamforming algorithm can aim at the direction-of-arrival of jammer automatically. But when the antenna platform vibrates or interference moves quickly, it is possible that the mismatching occurs between adaptive weight and data due to the perturbation of the interference location. To solve these problems above, a new robust beamforming control method is presented to widen nulls of adaptive antenna array. In this proposed method, the weight vector is optimized to involve minimization of a quadratic function. The presented method can provide an improved robustness against the interference angle shaking and suppress the interference signals and make the mean output array SINR. Simulation results demonstrate its validity.