CAJ | 학술논문

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。
공형진렬적공역도향시량통상불구유 Vandermonde 결구，사득괄용우균균선진혹면진적쾌속고분변공간보고계방법불능직접응용우공형진렬중。차감진렬류형내삽변환사상，분별건립료반구공형진렬도구형진렬화십자진렬적량충변환관계，대비연구료허의구형진화허의십자진재파체방향고계、자괄응파속형성화운산복잡도방면적성능。이론분석여방진실험명학료허의구형진화허의십자진적괄용조건，가위공형진렬적공정응용제공삼고。
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 .