| 基于奇异值分解的空域海杂波抑制算法 |
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| 引用本文： | 王龙岗,岳显昌,吴雄斌,易先洲. 基于奇异值分解的空域海杂波抑制算法[J]. 电波科学学报, 2021, 36(4): 645-652. DOI: 10.13443/j.cjors.2020060203 |
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| 作者姓名： | 王龙岗 岳显昌 吴雄斌 易先洲 |
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| 作者单位： | 武汉大学电子信息学院，武汉 430072 |
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| 摘 要： | 为实现对高频地波雷达(high frequency surface wave radar,HFSWR)一阶海杂波谱中目标的检测,提出了基于奇异值分解(singular value decomposition,SVD)的空域海杂波抑制算法(简称空域SVD算法).空域SVD算法是利用海杂波较强的相关性,将邻近距离单元作为参...
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| 关 键 词： | 高频地波雷达(HFSWR) 目标检测 奇异值分解(SVD) 空域 抑制海杂波 |
| 收稿时间： | 2020-06-02 |
Sea clutter suppression algorithm in spatial domain based on singular value decomposition |
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| WANG Longgang,YUE Xianchang,WU Xiongbin,YI Xianzhou. Sea clutter suppression algorithm in spatial domain based on singular value decomposition[J]. Chinese Journal of Radio Science, 2021, 36(4): 645-652. DOI: 10.13443/j.cjors.2020060203 |
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| Authors: | WANG Longgang YUE Xianchang WU Xiongbin YI Xianzhou |
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| Affiliation: | School of Electronic Information, Wuhan University, Wuhan 430072, China |
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| Abstract: | In order to detect the targets in the first-order sea clutter spectrum of high frequency surface wave radar (HFSWR), a method based on singular value decomposition (SVD) is proposed to suppress sea clutter in spatial domain. The sea clutter suppression method is based on the strong correlation of sea clutter, thus we take the adjacent range bin as the reference. Then the sea clutter subspace and noise subspace in the spatial domain is estimated by singular value decomposition of its array covariance matrix. Finally, we subtract its projection in the sea clutter subspace from the array signal with the orthogonality of subspace, and achieves the purpose of suppressing sea clutter in the spatial domain. Compared with the existing methods of sea clutter suppression in spatial domain, there is no need to know the azimuth of sea clutter in advance. The subspace is estimated by singular value decomposition of its array covariance matrix, which makes it easier and more accurate to estimate the sea clutter subspace and noise subspace. The result shows that the method improves the signal to clutter plus noise ratio (SCNR), which is benefit to target detection. |
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