SAR中的饱和干扰：理论分析和抑制方法

IF 4.7 2区地球科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing Pub Date : 2025-03-24 DOI:10.1109/JSTARS.2025.3554199

Lunhao Duan;Xingyu Lu;Jianchao Yang;Huizhang Yang;Shiyuan Zhang;Guanqi Tong;Ke Tan;Zheng Dai;Hong Gu

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引用次数: 0

摘要

合成孔径雷达（SAR）系统对干扰高度敏感，干扰抑制成为一个关键问题。尽管使用参数、非参数、半参数方法和机器学习对SAR干扰抑制进行了大量研究，但这些研究往往忽视了高功率干扰的影响，由于SAR接收机有限的动态范围，高功率干扰可能会使其饱和。这种饱和会导致许多先前研究的抑制方法的模型不匹配和性能下降。本文对SAR系统中的饱和干扰进行了详细的分析。建立了不同类型干扰的时域饱和信号模型，分析了饱和干扰的频域杂散特性。在此基础上，提出了一种适用于饱和窄带和宽带干扰的新型干扰抑制方法。我们使用来自Radarsat-1的半实际数据验证了我们的方法，证明了它们在抑制窄带和宽带饱和干扰方面的有效性。此外，我们还利用高分三号的真实饱和干扰数据进行了分析验证。结果证实了该方法在饱和条件下提高SAR性能的能力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Saturated Interference in SAR: Theoretical Analysis and Suppression Solutions

Synthetic aperture radar (SAR) systems are highly sensitive to interference, making interference suppression a critical concern. While significant research has been conducted on SAR interference suppression using parametric, nonparametric, semiparametric methods, and machine learning, these studies often neglect the impact of high-power interference, which can saturate SAR receivers due to their limited dynamic range. This saturation can lead to the model mismatch and performance degradation of many previously studied suppression methods. In this article, we provide a detailed analysis of saturated interference in SAR systems. We develop time-domain saturation signal models for different types of interference, and analyze the frequency domain spurious characteristics of saturated interference. Based on this analysis, we propose novel interference suppression method adapted for saturated narrowband and wideband interference. We validate our methods using semiactual data from Radarsat-1, demonstrating their effectiveness in suppressing both narrowband and wideband saturated interference. Besides, we also conducted analysis and verification using the real saturated interference data of Gaofen-3. The results confirm the proposed methods' capability to enhance SAR performance under saturation conditions.

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来源期刊

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing 地学-成像科学与照相技术

CiteScore

9.30

自引率

10.90%

发文量

563

审稿时长

4.7 months

期刊介绍： The IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing addresses the growing field of applications in Earth observations and remote sensing, and also provides a venue for the rapidly expanding special issues that are being sponsored by the IEEE Geosciences and Remote Sensing Society. The journal draws upon the experience of the highly successful “IEEE Transactions on Geoscience and Remote Sensing” and provide a complementary medium for the wide range of topics in applied earth observations. The ‘Applications’ areas encompasses the societal benefit areas of the Global Earth Observations Systems of Systems (GEOSS) program. Through deliberations over two years, ministers from 50 countries agreed to identify nine areas where Earth observation could positively impact the quality of life and health of their respective countries. Some of these are areas not traditionally addressed in the IEEE context. These include biodiversity, health and climate. Yet it is the skill sets of IEEE members, in areas such as observations, communications, computers, signal processing, standards and ocean engineering, that form the technical underpinnings of GEOSS. Thus, the Journal attracts a broad range of interests that serves both present members in new ways and expands the IEEE visibility into new areas.