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Resolution and synthetic aperture characterization of sparse radar arrays

机译：稀疏雷达阵列的分辨率和合成孔径表征

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摘要

The concept of radar satellite constellations, or clusters, for synthetic aperture radar (SAR), moving target indicator (MTI), and other radar modes has been proposed and is currently under research. These constellations form an array that is sparsely populated and irregularly spaced; therefore, traditional matched filtering is inadequate for dealing with the constellation's radiation pattern. To aid in the design, analysis, and signal processing of radar satellite constellations and sparse arrays in general, the characterization of the resolution and ambiguity functions of such systems is investigated. We project the radar's received phase history versus five sensor parameters: time, frequency, and three-dimensional position, into a phase history in terms of two eigensensors that can be interpreted as the dimensions of a two-dimensional synthetic aperture. Then, the synthetic aperture expression is used to derive resolution and the ambiguity function. Simulations are presented to verify the theory.
机译：已经提出了雷达卫星星座的概念，或簇，用于合成孔径雷达（SAR），移动目标指示器（MTI）和其他雷达模式，目前正在研究中。这些星座形成稀疏填充和不规则间隔的阵列;因此，传统的匹配过滤不足以处理星座的辐射模式。为了帮助雷达卫星星座的设计，分析和信号处理通常，研究了这种系统的分辨率和歧义功能的表征。我们将雷达接收的阶段历史与五个传感器参数项目投影：时间，频率和三维位置，以两种远见传感器的相位历史，其可以被解释为二维合成孔径的尺寸。然后，合成孔径表达式用于导出分辨率和歧义函数。提出了模拟以验证理论。

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