柱面共形阵列天线盲极化2D DOA 估计

针对柱面共形阵列天线的DOA估计问题,充分利用柱面载体的单曲率特性,通过合理的阵元设置,基于子空间原理,提出了盲极化2DDOA估计算法。首先,利用一条母线上的阵元构成子阵1,基于ESPRIT算法,实现信源俯仰角估计。然后,利用剩余阵元构成子阵2,结合子空间原理以及俯仰角估计值,通过一维参数搜索完成方位角估计,并实现了俯仰角与方位角的自动配对。该算法在不需要信源极化状态与阵元方向图任何信息的情况下进行二维来波方向估计,估计精度高、分辨力强。同时,所提算法不需要额外的参数配对,简化了估计方法的步骤,计算量小,易于实现。在不同信噪比、快拍数条件下的计算机Monte-Carlo仿真实验表明,所提算法可有效地解决共形阵DOA估计问题。

An Estimation of Blind 2D DOA on Cylindrical Conformal Array Antenna with Respect to Polarization Diversity

Considering the singly curved surface of cylindrical carrier, a blind 2D DOA (Direction-Of-Arrival) estimation algorithm for cylindrical conformal array antenna with respect to polarization is proposed based on space theory. The direction of source can be found exactly without knowing the source polarization and the element pattern by the presented method. The new algorithm can be implemented just using a one-dimensional search and solution of equation without parameters pairing. Monte-Carlo simulation results are provided to demonstrate the effectiveness of the proposed method.