王旭莹,张润宁,王志斌

• 1:中国空间技术研究院遥感卫星总体部

摘要(Abstract)：

由于受到斜视角和运动速度的影响，方位多通道合成孔径雷达(SAR)的方位模糊和速度模糊问题更加严重，从而影响斜视模式下运动目标的多通道重建与成像。为了解决该问题，文章提出了一种星载方位多通道斜视SAR运动目标成像方法。首先，分析并建立斜视模式下运动目标精确回波模型，然后，基于谱估计及改进Radon变换实现运动目标无模糊径向速度估计，对目标二维频谱进行匹配滤波实现运动目标成像。最后，点目标仿真实验验证了该方法的有效性。

关键词(KeyWords)： 方位多通道SAR;斜视成像;运动目标;径向速度估计

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 王旭莹,张润宁,王志斌

参考文献(References)：

• [1] 徐伟，魏正彬，黄平平，等.星载SAR斜视模式运动目标方位多通道信号重建方法[J].电子与信息学报，2021,43(8):2276-2285.XU Wei,WEI Zhengbin,HUANG Pingping,et al.Azimuth multichannel reconstruction for moving targets in spaceborne squinted multichannel synthetic aperture radar[J].Journal of Electronics & Information Technology,2021,43(8):2276-2285(in Chinese).
• [2] XIONG S,NI J,ZHANG Q,et al.Ground moving target imaging for highly squint SAR by modified minimum entropy algorithm and spectrum rotation[J].Remote Sensing,2021,13(21):4373.
• [3] LONG Y,ZHAO F,ZHENG M,et al.An Unambiguous imaging method of moving target for maritime scenes with spaceborne high-resolution and wide-swath SAR[J].IEEE Transactions on Geoscience and Remote Sensing,2022,60:5224519.
• [4] YANG J,QIU X,ZHONG L,et al.Unambiguous imaging for moving targets in maritime scenarios with dual receive channel mode of GF-3 satellite[C]// Proceedings of 6th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR).Beijing:Chinese Institute of Electronics,2020.
• [5] ZHANG Y,XIONG W,DONG X C,et al.A novel azimuth spectrum reconstruction and imaging method for moving targets in geosynchronous spaceborne-airborne bistatic multichannel SAR[J].IEEE Transactions on Geoscience and Remote Sensing,2020,58:5976-5991.
• [6] ZHANG Z,YU W,ZHENG M,et al.Doppler centroid estimation for ground moving target in multichannel HRWS SAR system[J].IEEE Geoscience and Remote Sensing Letters,2021(19):1-5.
• [7] HUANG P,XIA X G,WANG L,et al.Imaging and relocation for extended ground moving targets in multichannel SAR-GMTI systems[J].IEEE Transactions on Geoscience and Remote Sensing,2022,60:5214024.
• [8] LI B,SUN G C,XING M,et al.Moving target radial velocity estimation method for HRWS SAR system based on subspace projection[J].IEEE Geoscience and Remote Sensing Letters,2021 (99):1-5.
• [9] 王玉莹，张志敏，李宁，等.高分宽幅SAR系统下的方位多通道运动目标成像算法研究[J].电子与信息学报，2020,42(3):541-546.WANG Yuying,ZHANG Zhimin,LI Ning,et al.A moving target imaging approach for the multichannel in azimuth high resolution wide swath SAR system[J].Journal of Electronics & Information Technology,2020,42(3):541-546(in Chinese).
• [10] TAN W,XU W,HUANG P,et al.Investigation of azimuth multichannel reconstruction for moving targets in high resolution wide swath SAR[J].Sensors,2017,17(6):1270.
• [11] XU W,WEI Z,HUANG P,et al.Azimuth multichannel reconstruction for moving targets in geosynchronous spaceborne-airborne bistatic SAR[J].Remote Sensing,2020,12(11):1703.
• [12] WEBER R J,HUANG Y K,Ieee.Analysis for capon and MUSIC DOA estimation algorithms[C]// Proceedings of IEEE Antennas and Propagation International Symposium.New York:IEEE,2009.
• [13] NEO Y L,WONG F,CUMMING I G.A Two-dimensional Spectrum for Bistatic SAR processing using series reversion[J].IEEE Geoscience and Remote Sensing Letters,2007,4(1):93-96.