FCA-ESPRIT: a closed-form 2-D angle estimation algorithm for filled circular arrays with arbitrary sampling lattices
FCA-ESPRIT: a closed-form 2-D angle estimation algorithm for filled circular arrays with arbitrary sampling lattices
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DOI：
10.1109/78.738255
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
J. Ramos;C. P. Mathews;M. Zoltowski
中科院分区：
文献类型：
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作者：
J. Ramos;C. P. Mathews;M. Zoltowski
本文讨论了同时估计多个同信道信号的方位角和仰角入射到一个阵列的天线。提出了一种新的适用于填充圆阵的闭合算法。该算法被称为FCA-ESPRIT，适用于任何FCA几何形状，例如，使用矩形、六边形、极坐标或随机采样网格构造的FCA。对FCA几何形状施加的唯一约束是相邻传感器之间的间隔在整个孔径上平均应为半个波长或更小。该算法通过求解一组类似ESPRIT的方程来提供自动配对的方位角和仰角估计，其中未知数具有sin（/spl θ//sub i/）e/sup j/spl phi/（i）/（其中/spl θ//sub i/和/spl phi//sub i/分别是第i个源的仰角和方位角）的形式。该算法通过一个封闭形式的过程提供到达角估计，它不需要计算上昂贵的搜索或优化程序。
This article addresses the simultaneous estimation of the azimuth and elevation angles of multiple co-channel signals incident upon an array of antennas. A new closed-form algorithm that is applicable with filled circular arrays (FCAs) is presented. The algorithm, which is called FCA-ESPRIT, is applicable with any FCA geometry, e.g., FCAs constructed using rectangular, hexagonal, polar, or random sampling lattices. The only constraint imposed on the FCA geometry is that the spacing between adjacent sensors should be half a wavelength or less on average across the entire aperture. The algorithm provides automatically paired azimuth and elevation angle estimates by solving a set of ESPRIT-like equations wherein the unknowns have the form sin(/spl theta//sub i/)e/sup j/spl phi/(i)/ (where /spl theta//sub i/ and /spl phi//sub i/ are the elevation and azimuth angles of the ith source, respectively). The algorithm provides arrival angle estimates via a closed-form procedure-it does not require computationally expensive search or optimization procedures.