阵列估计误差和扰动误差引起方向图畸变的校正

Remedies of the estimation errors and perturbation errors

针对由于取样协方差矩阵估计误差和导向矢量扰动误差的存在，使波束形成器产生高的旁瓣和畸变的主波束，提出了用代价函数校正导向矢量扰动误差引起的方向图畸变．当两种误差同时存在且为非白色高斯扰动时，可用联合处理法来校正方向图畸变．计算机仿真结果表明，这种校正方法是有效的．

The presence of covariance matrix estimation errors and random steering vector errors results in adapted antenna patterns with high sidelobes and distorted mainbeams. The diagonal loading technique can be used to reduce the effects by estimation errors. A new cost function method is proposed to improve the distorted antenna patterns caused by random steering errors. When the estimation errors and non white Gauss random perturbation errors exist in the meantime, the union process method is used in this paper. Computer simulation results are provided to illustrate the performance of the method proposed.