半球共形阵列的两种虚拟变换方式性能对比  

Performance comparison between two different virtual transformations of the hemisphere conformal array

作　　者：张学敬[1] 杨志伟[1] 廖桂生[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071

出　　处：《西安电子科技大学学报》2014年第3期33-40,共8页Journal of Xidian University

基　　金：国家自然科学基金资助项目(60901066);国家部委预研基金资助项目(9140xxx0104);中央高校基本科研业务费专项资金资助项目(K5051302007)

摘　　要：共形阵列的空域导向矢量通常不具有Vandermonde结构,使得适用于均匀线阵或面阵的快速高分辨空间谱估计方法不能直接应用于共形阵列中.借鉴阵列流形内插变换思想,分别建立了半球共形阵列到矩形阵列和十字阵列的两种变换关系,对比研究了虚拟矩形阵和虚拟十字阵在波达方向估计、自适应波束形成和运算复杂度方面的性能.理论分析与仿真实验明确了虚拟矩形阵和虚拟十字阵的适用条件,可为共形阵列的工程应用提供参考.The spatial steering vector of the conformal array usually does not have a Vandermonde structure , so that some fast high-resolution spatial-spectrum estimation methods which are suitable for uniform linear arrays or plane arrays cannot be directly applied to the conformal arrays . This paper adopts the idea of array manifold interpolation transformation and establishes two different transformation relations from a hemisphere conformal array to a rectangular array and a cross array , respectively . Then we comparatively study the performance of the virtual rectangular array and the virtual cross array on DOA （ Direction of Arrival ） estimation , adaptive beamforming and computational complexity . The applicable conditions of two kinds of virtual arrays are clearly confirmed by theoretical analysis and extensive simulation , and results of this paper can provide a reference for the engineering applications of conformal arrays .

关 键 词：共形阵列 虚拟内插 波达方向估计 波束形成 

分 类 号：TN821.8[电子电信—信息与通信工程]