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首页> 外文期刊>IEEE Geoscience and Remote Sensing Letters >Sea Clutter Suppression for Shipborne HF Radar Using Cross-Loop/Monopole Array
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Sea Clutter Suppression for Shipborne HF Radar Using Cross-Loop/Monopole Array

机译：使用横循环/单极阵列的海运HF雷达的海杂波抑制

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摘要

The shipborne high-frequency ground wave radar (HFGWR) provides a better condition for sea surface target detection than the shore-based one because of its maneuverability and flexibility. However, the first-order Bragg spectra of the shipborne HFGWR would be broadened by the Doppler shift of the ship motion, which makes the vessel echo easily submerged. Even though some methods have been applied to suppress the broadened Bragg spectra for target detection, most of them are hard to achieve good result in a small-aperture radar. An orthogonal projection method to suppress the broadened Bragg spectra using a cross-loop/monopole array is proposed in this letter. The proposed method mainly includes two steps: 1) estimate the space of sea clutter in a spatial domain according to the ocean echo characteristics and 2) design an adaptive filter of single or multiple Doppler bins on the estimated clutter space to suppress the first-order spectra. After suppression, we use the multiple signal classification algorithm to estimate the incident direction of targets. The experimental data validate that the sea clutter is well suppressed and the target signal-to-clutter ratio is increased by the algorithm.
机译：由于其机动性和灵活性，船载高频接地波雷达（HFGWR）提供了比岸上的地表目标检测更好的条件。然而，船舶动作的多普勒偏移将扩大船载HFGWR的一阶布拉格光谱，这使得船舶回声容易浸没。尽管已经应用了一些方法来抑制较宽的靶检测的布拉格光谱，但大多数难以在小孔径雷达中实现良好的结果。在这封信中提出了一种抑制横循环/单极阵列抑制扩大布拉格光谱的正交投影方法。该方法主要包括两个步骤：1）根据海洋回声特性和2）在估计的杂波空间上设计单个或多个多普勒箱的自适应滤波器的自适应滤波器来抑制一阶的空间域。光谱。抑制后，我们使用多个信号分类算法来估计目标的入射方向。实验数据验证了海杂波抑制得很好，并且通过算法增加了目标信号到杂波比。

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