三正交分离式极化敏感阵列的波达方向估计

发布时间：2018-05-30 23:01

本文选题：DOA估计 + 极化敏感阵列　；参考：《电子与信息学报》2014年05期

【摘要】：该文研究了分离式极化敏感阵列(SS-PSA)的多目标波达方向(DOA)估计问题。首先建立三正交分离式极化敏感均匀稀疏阵列的信号模型;接着利用阵列的旋转不变性采用ESPRIT算法计算出多值模糊DOA估计;利用该模糊DOA估计值对分离式极化天线进行空间相移的补偿,然后利用共点式极化天线之间的多维角度结构求出对应的虚拟DOA估计;最后通过提取多值模糊估计值和对应虚拟估计值之差的最小范数得到多目标的DOA估计。该文所提阵列采用分离式极化天线代替传统共点式极化天线,降低了阵列的互耦影响;采用稀疏阵列结构有效地扩展了阵列的物理孔径,大大提高了DOA估计精度。计算机仿真结果证明了该算法对分离式极化天线DOA估计的有效性和高精度性。
[Abstract]:In this paper, we study the DOA estimation of multiple targets in a split polarization-sensitive array (SS-PSA). Firstly, the signal model of three-orthogonal polarization-sensitive uniform sparse array is established, and then the multi-valued fuzzy DOA estimation is calculated by using the rotation invariance of the array and the ESPRIT algorithm. The fuzzy DOA estimation is used to compensate the spatial phase shift of the split polarization antenna, and the corresponding virtual DOA estimation is obtained by using the multi-dimensional angle structure between the common-point polarization antennas. Finally, the multiobjective DOA estimation is obtained by extracting the minimum norm of the difference between the multi-valued fuzzy estimators and the corresponding virtual estimators. In this paper, the split polarization antenna is used instead of the conventional common-point polarization antenna, which reduces the mutual coupling effect of the array, and the physical aperture of the array is effectively expanded by the sparse array structure, and the precision of DOA estimation is greatly improved. The computer simulation results show that the proposed algorithm is effective and accurate for the DOA estimation of separated polarized antennas.
【作者单位】：西安电子科技大学雷达信号处理国家重点实验室;
【基金】：国家自然科学基金(61001209,61101244,61071175) 中央高校基本科研业务费专项资金(K5051202038) 长江学者和创新团队计划(IRT0954)资助课题
【分类号】：TN911.7

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