一种稳健超增益波束形成方法

最小方差无失真响应(MVDR)的基本原理是让它感兴趣方位的信号无失真通过,而使得波束输出噪声方差最小。本文提出一种圆阵稳健超增益波束形成方法,在各向同性噪声场中,当阵元间距小于半个波长时,其性能远远优于传统的波束形成器;同时,采用白噪声增益约束(white noise gain constraint,WNC)算法来提高超增益波束形成受随机误差扰动影响的鲁棒性。仿真验证算法的有效性。

A Robust Super Gain Beamforming Method

The basic principle of the Minimum Variance Distortionless Response(MVDR)is to let the signal of the direction of interest pass without distortion,and make the variance of beam output noise minimum.This paper proposes a robust super gain beamforming method for circular array.The performance of this beamformer is much better than that of the traditional beamformer when the array element spacing is less than half a wavelength in isotropic noise field.At the same time,the white noise gain constraint(WNC)algorithm is used to improve the robustness of the super gain beamforming affected by the perturbation of random errors.And the simulation results show the effectiveness of this algorithm in this paper.