摘要
由于介质顶对来波的发散作用,到达平面阵的波是非平面波。本文研究基于介质顶阵的到达角(DOA)估计方法。通过对采样协方差矩阵进行远场近似(FFA)处理,用高分辨特征结构技术(MUSIc算法)进行DOA估计,得到了比较好的结果。计算机模拟结果证实了该方法的有效性。
The performance of DOA estimation will be distorted in the presence of dielectric dome in the Dielectric Dome Array(DDA) because the dielectric dome diverges the planar wave-front into non-planar wavefront inside it. This paper proposes a Far Field Approximation(FFA) method to improve the performance based on DDA. This method first reconstructs a FFA Co-variance matrix, which is Toplitz and approximates to the far field data covariance matrix, and then the high-resolution eigenstructure techniques can be utilized to estimate the DOAs without revising the planar wavefont assumption. Simulation results confirm the theoretical work.
