联合变化检测与子带对消技术的SAR图像干扰抑制方法

doi:10.12305/j.issn.1001-506X.2021.09.15

Abstract

Abstract:

The subband spectral cancellation (SSC) is an effective method to suppress radio frequency interference (RFI) of synthetic aperture radar (SAR). But it is easy to lose the image detail information while eliminating the interference, which affects the subsequent image interpretation. Therefore, based on the SSC method, combined with change detection technology, an improved SAR image interference suppression method is proposed. According to the improved log ratio change detection operator, the proposed method realizes the secondary detection of interference, eliminates the false alarm information in the interference image, and avoids the loss of useful signals in the image. Based on the wide-band mode interference SAR image of the European Space Agency Sentinel-1A satellite, the interference suppression and effect evaluation are carried out. The experimental results show that the proposed method can effectively suppress the interference and retain the SAR image details as much as possible, which proves the effectiveness of the proposed method.

Key words: synthetic aperture radar (SAR), radio frequency interference (RFI) suppression, subband spectral cancellation (SSC), change detection

CLC Number:

TN957

Ning LI, Zongsen LYU, Zhengwei GUO. SAR image interference suppression method by integrating change detection and subband spectral cancellation technology[J]. Systems Engineering and Electronics, 2021, 43(9): 2484-2492.

Figures/Tables 8

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References 31

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参数	数值
载波频率/GHz	5.405
景中心斜距/km	707.325
等效速度/(m·s^-1)	7 597.664
脉冲重复频率/Hz	1 717.129
距离向采样率/MHz	64.345
距离向带宽/MHz	56.597/48.358/42.861
发射脉冲时宽/μs	52.406/61.991/53.397

评价指标	抑制方法
评价指标	后验陷波法	SSC法	所提方法
平均梯度	3.099	4.891	5.132
图像熵	6.471	6.873	7.130

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SAR image interference suppression method by integrating change detection and subband spectral cancellation technology

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