矢量线阵二维波达方位估计的方法

声矢量传感器南声压传感器和质点振速传感器组成，它可以空间共点、时间同步测量声场的声压标量和振速矢量信息。钏对声压线阵无法同时分辨目标的方位角和俯仰角，而三维矢量传感器线阵会带来成本的增加和工程应用上的困难．利用二维矢量传感器组成的直线阵对目标的二维波达方位进行联合估计，详细推导了矢量阵MUSIC算法的数学表达式，并着重对矢量线阵在三维坐标不同轴上时对方位估计的影响进行了研究。仿真结果表明二维矢量线阵布放在水平的X轴或Y轴上时存在方位模糊．而布放在垂直的Z轴上时可以实现全空间无模糊定向，且对双目标也有较高的分辨率。

A method of 2-D DOA estimation using a vector sensor line array

Acoustic vector sensor composed of an acoustic pressure sensor and particle velocity sensors can simultaneously measttre the information of pressure scalar and velocity vector at a same location. Compared with the pressure line array that cannot distinguish azimuth and elevation of the target at the same time and the 3-D vector sensor array that is high cost and hard to be applied to practical projects, a line array made up of 2-D vector sensors is adopted to estimate 2-D DOA jointly. Math expressions of the vector-sensor array MUSIC algorithm are deduced, and the effects of placing vector-sensor linear array along different axes in 3-D Coordinate System on the DOA estimation are specially studied. Simulation results indicate that the 2-D vector sensor line array placing on horizontal X axis or Y axis has the ambiguity of DOA estimation, but no ambiguity on vertical Z axis and has a high resolution for two signals.