Direction Finding of Shortwave Emitters Based on Spectrum Estimation

Abstract

针对短波沃森瓦特测向系统，提出了一种基于波束形成的测向算法，该算法将沃森瓦特接收机的三个通道输出进行线性组合，形成阵列测量矢量，采用最小方差无失真波束形成器进行空域滤波测向。与传统沃森瓦特算法相比，该方法充分利用了爱德考克天线的阵列孔径。计算机仿真表明，所提算法的测向精度优于传统算法。 An algorithm based on beamforming is proposed for shortwave direction finding with a Watson- Watt (WW) system. It constructs an array measurement vector by the linear combination of the outputs of the three receiving channels of a WW system, and then utilizes the Minimum Variance Distortionless Response (MVDR) beamforming to perform spatial filtering. Compared to the traditional WW algorithm, the proposed method takes advantage of the full aperture of the Adcock antenna array, which leads to its better accuracy of direction finding, and it has been demonstrated by computer simulations.