两种基于分数低阶统计量波束形成的推广

为抑制脉冲稳定分布噪声对波束形成的影响,通常采用分数低阶统计量进行处理,将现存的两种基于分数低阶统计量的波束形成方法分别进行推广,证明了两种推广后算法对应的协方差矩阵是互为共轭的,并且对协方差矩阵的非奇异性进行了讨论.仿真实验表明:与传统的线性约束最小功率波束形成相比,两种推广的波束形成算法,在脉冲稳定分布噪声下能够保证无畸变输出,并且具有更低的旁瓣.

Generalizations of two beamformers based on fractional lower-order stochastics

In order to combat the hostile effect of impulsive stable distribution noise, the fractional lower-order stochastics are utilized for the beamforming. The generalizations of the two existing beamformers are presented. The two covariance matrices of the generalized algorithms are proved to be conjugate. The nonsingularity of these two covariance matrices is also discussed. Simulations show that compared with traditional linearly constrained minimum power beamforming, the outputs of these two generalized beamforming have distortionless response for the signal under impulsive stable distribution noise and lower sidelobe.