基于介质顶阵的到达角估计
DOA ESTIMATION BASED ON DIELECTRIC DOME ARRAY
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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。
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关键词:
- DOA估计; MUSIC算法; 介质顶阵
Abstract: The performance of DOA estimation will be distorted in the presence of dielectric dome in the Dielectric Dome Array(DDA) because the dielectric dome diverge the planar wavefront into non-planar wavefront inside it. We proposed a far field approximation(FFA) method in this paper to improve the performance based on DDA. This method first reconstructs a FFA covariance matrix, which is Toplitz and approximate 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. -
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