基于二阶锥规划的空域维纳滤波

提出了基于二阶锥规划的空域维纳滤波。基于噪声与阵列流型不相关的特性,将阵列的方向向量作为期望通过二阶锥规划方法对阵列快拍进行维纳滤波。利用维纳滤波抑制噪声的能力,提高阵列的信号检测和方位估计性能。通过仿真研究,验证了单目标时,其低信噪比下的信号检测性能优于Bartlett波束形成,其方位估计的信噪比门限要低于Bartlett波束形成和MUSIC算法,因而是一种优良的波束形成器。该波束形成器用于多波束测深仪和侧扫声纳等海洋测绘设备的阵列,可以有效的提高设备的作用距离和测量精度。

Spatial Wiener Filter Based on Second Order Cone Programming

Spatial Wiener filter based on second order cone programming （SOCP） is proposed. Take the use of the property of irrelevance of noise and array manifold, filter the snapshot with the direction vector as the expect input through SOCP. Make use of wiener filter＇ s ability of noise suppression, the detection and direction of arrive （DOA） estimation performanice is improved. Simulation is carried out which verifies that the SNR threshold of spatial Wiener filter＇ s D0A estimation is lower then that of Bartlett beamforming and MUSIC under the condition of one signal, and the detection ability is better than Bartlett beamforming. So spatial Wiener filter is a very fine beamformer which can be applied to arrays of ocean surveying equipments such as swath bathymeter and side scan sonar to improve ranging and accuracy performances.