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

系统工程与电子技术 ›› 2021, Vol. 43 ›› Issue (9): 2484-2492.doi: 10.12305/j.issn.1001-506X.2021.09.15

联合变化检测与子带对消技术的SAR图像干扰抑制方法

李宁^1,^2,^3,*, 吕宗森^1,^2,³, 郭拯危^1,^2,³

1. 河南大学计算机与信息工程学院, 河南开封 475004
2. 河南大学河南省大数据分析与处理重点实验室, 河南开封 475004
3. 河南大学河南省智能技术与应用工程技术研究中心, 河南开封 475004

收稿日期:2020-12-02 出版日期:2021-08-20 发布日期:2021-08-26
通讯作者: 李宁
作者简介:李宁(1987—), 男, 教授, 博士, 主要研究方向为多模式合成孔径雷达成像及其应用技术|吕宗森(1996—), 男, 硕士研究生, 主要研究方向为合成孔径雷达信号处理、干扰抑制|郭拯危(1963—), 女, 教授, 本科，主要研究方向为SAR图像处理、无线传感器网络
基金资助:
国家自然科学基金(61871175);河南省高等学校重点科研项目(19A420005);河南省高等学校重点科研项目(21A520004);河南省科技攻关计划(192102210082);河南省青年人才托举工程(2019HYTP006);河南大学研究生教育创新与质量提升计划(SYL20060144)

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

Ning LI^1,^2,^3,*, Zongsen LYU^1,^2,³, Zhengwei GUO^1,^2,³

1. College of Computer and Information Engineering, Henan University, Kaifeng 475004, China
2. Henan Key Laboratory of Big Data Analysis and Processing, Henan University, Kaifeng 475004, China
3. Henan Engineering Research Center of Intelligent Technology and Application, Henan University, Kaifeng 475004, China

Received:2020-12-02 Online:2021-08-20 Published:2021-08-26
Contact: Ning LI

摘要/Abstract

摘要：

子带对消(subband spectral cancellation, SSC)法是一种有效的合成孔径雷达(synthetic aperture radar, SAR)射频干扰(radio frequency interference, RFI)抑制方法, 但其在消除干扰的同时容易损失图像细节信息, 影响后续图像解译。为此, 在SSC方法的基础上, 联合变化检测技术, 提出一种改进的SAR图像干扰抑制方法。根据改进的对数比变化检测算子, 所提方法实现了干扰二次检测, 消除了干扰图像中的虚警信息, 避免了图像中有用信号的损失。基于欧空局Sentinel-1A卫星干涉宽幅模式受干扰SAR图像, 开展了干扰抑制与效果评估。实验结果表明, 所提方法能够在有效抑制干扰的同时尽可能保留SAR图像细节信息, 证明了所提方法的有效性。

关键词: 合成孔径雷达, 射频干扰抑制, 子带对消, 变化检测

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

中图分类号:

TN957

李宁, 吕宗森, 郭拯危. 联合变化检测与子带对消技术的SAR图像干扰抑制方法[J]. 系统工程与电子技术, 2021, 43(9): 2484-2492.

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.

图/表 8

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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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联合变化检测与子带对消技术的SAR图像干扰抑制方法

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

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