基于图拉普拉斯嵌入的合成孔径雷达时变窄带干扰抑制算法

doi:10.12305/j.issn.1001-506X.2022.06.10

Abstract

Abstract:

As a wideband radar system, the synthetic aperture radar (SAR) usually conflicts with other electromagnetic systems working in the same frequency bands. These signals, most of which are narrow-band interference (NBI) for SAR systems, severely interfere SAR systems to generate a high-resolution image. Many previous research results focused on the NBI suppression problem, however, few of them noticed that the NBIs may be time-varying in a local region among different pulses, which restricts the suppression performance of some classic methods. Hence, in this paper, a graph Laplacian embedding (GLE) algorithm is proposed to suppress NBIs by constructing the Laplacian embedding connections between different pulses of signals. As a result, locally time-varying interferences are embedded in a non-linear low-dimensional manifold and can be effectively mitigated. The real SAR data measured with NBI are processed, and the results show the efficiency of the proposed algorithm.

Key words: synthetic aperture radar (SAR), narrow-band interference (NBI) suppression, graph Laplacian embedding (GLE)

CLC Number:

TN958

Dongning FU, Guisheng LIAO, Yan HUANG, Bangjie ZHANG, Xing WANG. Time-varying narrow-band interference suppression algorithm for SAR based on graph Laplacian embedding[J]. Systems Engineering and Electronics, 2022, 44(6): 1846-1853.

Figures/Tables 12

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References 22

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参数	数值
中心频率/GHz	10
带宽/MHz	200
采样频率/MHz	400
脉冲重复频率/Hz	1 000
平台速度/(m/s)	120

算法	RMSE
ESP	0.560
CLEAN	0.474
RPCA	0.455
GLE	0.357

信噪比/dB	算法
信噪比/dB	ESP	CLEAN	RPCA	GLE
-20	0.560	0.474	0.455	0.357
-15	0.505	0.422	0.373	0.308
-10	0.497	0.406	0.344	0.299

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Time-varying narrow-band interference suppression algorithm for SAR based on graph Laplacian embedding

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