任意几何结构阵列下的空间信号频率估计
ESTIMATING FREQUENCIES OF SPATIAL SIGNALS FOR ARBITRARY GEOMETRY ARRAY
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摘要: 该文论述了一种基于波束空间ESPRIT并适用于任意几何结构阵列的空间信号频率估计算法。在把阵元空间数据映射到DFT空间后,提取出不依赖于阵列几何结构的频率矢量,然后运用BeamspaceESPRIT的概念并通过一个间接的方法估计出信号频率。计算机模拟结果证实了该算法对不同阵列获取的信号的测频有效性并显示出良好的高分辨、高精度性能。Abstract: This paper presents a ESPRIT-based algorithm to estimate carrier frequencies of independent spatial signals with no geometric constraints on the array. After mapping the element space data into DFT space, the frequency vector is extracted which is independent of array information, and then beamspace ESPRIT is used to estimate the spatial signals frequencies via an indirect ESPRIT method. The simulation results demonstrate our algorithm to be of high-resolution and high-precision with arbitrary array geometry.
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