基于L型线阵的二维分布源参数估计方法

A parameter estimation method of 2D distributed source based on L-shape uniform array

针对二维分布源信号波达方向估计问题,提出了一个新的二维分布源模型及其参数估计方法。将基于角度信号密度函数的一维相干分布源模型扩展至二维,推导了二维分布源的广义阵列方向向量。在L型线阵下,利用广义MUSIC算法,首先估计出俯仰角及其扩散参数,然后利用估计出来的俯仰角及扩散参数对方位角及扩散参数进行估计。仿真实验表明,所提出的二维相干分布源参数估计算法具有良好的定向精度。

This paper proposes a new 2D distributed source model and the parameter estimation method of 2D distributed source aiming at the DOA estimation problem. A one-dimensional coherently distributed source model based on angular signal intensity has been expanded into two dimensions and a generalized steering vector has been deduced for 2D distributed source. Using the generalized MUSIC algorithm, the elevation and its angle spreading can be estimated firstly, then the azimuth and its angle spreading can be derived with the estimated elevation and elevation spreading based on L-shape uniform array. The simulation experiments show that the proposed DOA estimated method achieves high localization accuracy.