机载前视SAR三维成像算法研究

任笑真; 杨汝良

doi:10.3724/SP.J.1146.2009.00734

机载前视SAR三维成像算法研究

doi: 10.3724/SP.J.1146.2009.00734

任笑真^{①②;杨汝良,},
杨汝良

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出版历程
- 收稿日期: 2009-05-12
- 修回日期: 2009-09-11
- 刊出日期: 2010-06-19

Study on Three-Dimensional Imaging Algorithm for Airborne Forward-Looking SAR

Ren Xiao-zhen^{①②;杨汝良
,},
Yang Ru-liang

摘要

摘要: 该文以一种采用天线阵模式的机载前视合成孔径雷达(SAR)系统为对象，根据前视SAR的成像几何模型和回波信号特点，提出了一种适用于机载前视SAR的3维成像算法。该算法首先将各天线阵元接收一遍后的数据采用CS算法获得单幅SAR图像，然后将飞机飞行过程中获得的所有SAR图像中相同方位向对应的数据结合距离多普勒算法思想依次进行成像处理，最后获得3维像。模拟了X波段前视SAR点目标回波并进行了3维成像实验，对成像性能进行了分析。仿真结果验证了该算法的有效性。
- 合成孔径雷达; 天线阵; 前视; 距离-多普勒; 3维成像
Abstract: In this paper, an innovative airborne forward-looking SAR system using antenna array is studied, and a new three-dimensional imaging algorithm is proposed for airborne forward-looking SAR based on the image geometry and the characteristic of echo signal. A single SAR image was obtained with chirp scaling algorithm until all the receiving antennas have received echoes once. When plane flies along the track continuously, a sequence of two-dimensional SAR images in front of the flight path can be obtained. Then the three-dimensional image of forward-looking SAR can be obtained by focusing one section at an azimuth position one time with Range-Doppler algorithm until all the sections have been processed. Raw data of forward-looking SAR in X-band is simulated and three-dimensional image is achieved. The imaging result is analyzed, and simulation results confirm the validity of the proposed algorithm.

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参考文献(1)

Sutor T, Witte F, and Moreira A. A new sector imaging radar for enhanced visionSIREV[J].Proceedings of SPIE.1999, 3691:39-47[2]Krieger G, Mittermayer J, and Wendler M, et al.. SIREV- sector imaging radar for enhanced vision. Aerospace Science and Technology, 2003, (7): 147-158.[3]Mittermayer J and Wendler M. Data processing of an innovative forward looking SAR system for enhanced vision. Proceedings of EUSAR 2000, Munich, Germany, 2000: 733-736.Venot Y and Younis M. Compact forward looking mode SAR using digital beamforming on receive only. Proceedings of EUSAR 2000, Munich, Germany, 2000: 795-798.[4]Lombardini F, Pardini M, and Gini F. Sector interpolation for 3D SAR imaging with baseline diversity data. Proceedings of IEEE 2007 Waveform Diversity and Design Conference, Pisa, Jun 2007: 297-301.[5]Lombardini F, Pardini M, and Verrazzani L. A robust multibaseline sector interpolator for 3D SAR imaging. Proceedings of EUSAR 2008, Friedrichshafen, Germany, June 2008, (2): 69-72.[6]Reigber A. Airborne polarimetric SAR tomography. [Ph.D. dissertation], University of Stuttgart, 2001.[7]Ren Xiao-zhen, Tan Lu-lu, and Yang Ru-liang. Research of three-dimensional imaging processing for airborne forward-looking SAR. Proceedings of IET Radar 2009, Guilin, China,2009.[8]Tan Wei-xian, Hong Wen, and Wang Yan-ping, et al.. 3-D range stacking algorithm for forward-looking SAR 3-d imaging. Proceedings of IGARSS 2008, Boston, Massachusetts, USA, 2008: 1212-1215.[9]陈琦, 杨汝良. 机载前视合成孔径雷达Chirp Scaling成像算法研究[J].电子与信息学报.2008, 30(1):228-232浏览Chen Qi and Yang Ru-liang. Research of chirp scaling imaging algorithm for air-borne forward-looking SAR[J].Journal of Electronics Information Technology.2008, 30(1):228-232[10]陈琦. 机载斜视及前视合成孔径雷达系统研究. [博士论文]，中国科学院电子学研究所, 2006.[11]Chen Qi. Study on systems of airborne squint mode and forward looking mode synthetic aperture radar. [Ph.D. dissertation], Institute of Electronics, Chinese Academy of Sciences, 2006.[12]Chang C Y, Jin M, and Curlander J C. Squint mode SAR processing algorithm. Proceedings of IGARSS 1989, Vancouver, Canada, 1989: 1072-1076.

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