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Ground maneuvering target detection based on discrete polynomial-phase transform and Lv's distribution

机译：基于离散多项式相位变换和Lv分布的地面机动目标检测

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摘要

Highlights•The problems of range migration and Doppler frequency migration for the ground maneuvering targets in the SAR system is concerned in this paper.•The proposed method combines discrete polynomial-phase transform (DPT) and Lv's distribution (LVD), which are computationally efficient.•The proposed method considers the detection of target apart from the scene center, and can be applied in the scenario of both mono and multiple targets.AbstractIn a synthetic aperture radar (SAR) system, prolonging the integration time can improve the detection performance of the ground moving target. However, the complex motions of the target will induce severe range migration and Doppler frequency migration (DFM), which cause target energy defocused and deteriorate the imaging quality. In order to deal with the problem, a novel ground moving target focusing method is proposed. In this paper, the discrete polynomial-phase transform (DPT) is performed to reduce the phase order of the range compressed signal. Then, the residual range walk is removed by the constructed compensation function. Lastly, Lv's distribution (LVD) is used to motion parameter estimation and DFM correction. The proposed method is capable of focusing the targets both near and apart from the scene center and is computationally efficient. Several simulation results validate the effectiveness of the proposed method.
机译： 突出显示 • 本文关注了SAR系统中地面机动目标的距离迁移和多普勒频率迁移问题。 • 建议的方法结合了离散多项式-相位转换（DPT）和Lv分布（LVD），它们的计算效率很高。 •< / ce：label> 建议的方法除了将目标场景中心，并且可以应用于单个目标和多个目标的场景。 摘要 但是，目标的复杂运动会引起严重的距离偏移和多普勒频率偏移（DFM），从而导致目标能量散焦并降低成像质量。为了解决这一问题，提出了一种新颖的地面移动目标聚焦方法。在本文中，执行离散多项式相位变换（DPT）以减小范围压缩信号的相位。然后，通过构造的补偿功能消除剩余的距离游动。最后，Lv分布（LVD）用于运动参数估计和DFM校正。所提出的方法能够将目标聚焦在场景中心附近和远离场景中心，并且计算效率高。几个仿真结果验证了该方法的有效性。

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