CAJ | 학술논문

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。
침대이유분포원신호파체방향고계문제，제출료일개신적이유분포원모형급기삼수고계방법。장기우각도신호밀도함수적일유상간분포원모형확전지이유，추도료이유분포원적엄의진렬방향향량。재 L 형선진하，이용엄의MUSIC산법，수선고계출부앙각급기확산삼수，연후이용고계출래적부앙각급확산삼수대방위각급확산삼수진행고계。방진실험표명，소제출적이유상간분포원삼수고계산법구유량호적정향정도。
This paper proposes a new 2D distributed source model and the parameter estimation method of 2D distri-buted 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.