电光与控制, 2017, 24 (1): 24, 网络出版: 2017-02-09  

基于NUFFT的FMCW CSAR圆柱面场景成像波数域算法

NUFFT Based ω-k Algorithm of FMCW CSAR for Cylindrical Reconstruction Areas
作者单位
1 武警工程大学,a.信息工程系
2 武警工程大,b.电子技术系,西安 710086
摘要
针对调频连续波圆周合成孔径雷达(FMCW CSAR)传统波数域算法对圆柱面场景成像时插值的精度直接影响成像质量且计算量较大的问题,提出了一种基于非均匀傅里叶变换的FMCW CSAR圆柱面场景成像的波数域算法,基于雷达到目标点的斜距按照四阶泰勒级数展开推导出了FMCW CSAR波数域回波信号,并在此基础上利用二维非均匀傅里叶变换代替插值功能较好地实现了聚焦成像。
Abstract
The accuracy of the traditional ω-k algorithm of Frequency Modulated Continuous Wave (FMCW) Circular Synthetic Aperture Radar (CSAR) for image interpolation when reconstructing the cylinder areas has direct influence on the quality of imaging, and the process needs a large amount of calculation.To solve the problem, an ω-k algorithm based on Nonuniform Fast Fourier Transformation (NUFFT) is proposed, by which the echo signal of wave-number domain is deduced according to the fourth order Taylor expansion based on the slant range from radar to target.On the basis of which, the two-dimensional NUFFT is used instead of the interpolation function, and implements focused imaging.
参考文献

[1] 保铮,邢孟道,王彤.雷达成像技术[M].北京:电子工业出版社,2005.

[2] LIN Y, HONG W, TAN W X, et al.Extension of range migration algorithm to squint circular SAR imaging[J].IEEE Geoscience and Remote Sensing Letters, 2011, 8(4):651-655.

[3] LI Y H, JIN T, SONG Q.3D back-projection imaging in circular SAR with impulse signal[C]//The 2nd Asian-Pacific Conference on Synthetic Aperture Radar, 2009:775-778.

[4] 李浩林,张磊,保铮.加速后向投影圆迹SAR成像方法[J].信号处理,2015,31(6):638-642.

[5] LUO Y H, SONG H J, WANG R.An accurate and efficient extended scene simulator for FMCW SAR with static and moving targets[J].IEEE Geoscience and Remote Sensing Letter, 2014, 11(10):1159-1164.

[6] 洪文.圆迹SAR成像技术研究进展[J].雷达学报,2012,1(2):124-135.

[7] SOUMEKH M.Reconnaissance with slant plane circular SAR imaging[J].IEEE Transactions on Image Processing, 1996, 8(5):1252-1265.

[8] DALLINGER A, SCHELKSHORN S, DETLEFESN J.Effi-cient ω-k-algorithm for circular SAR and cylindrical reconstruction areas[J].Advances in Radio Science, 2006, 4(8):85-91.

[9] KOU L L, WANG X Q, CHONG J S, et al.Circular SAR processing using an improved omega-k-type algorithm[J].Journal of Systems Engineering and Electronics, 2010, 21(4):572-579.

[10] 张祥坤.高分辨圆迹合成孔径雷达成像机理及方法研究[D].北京:中国科学院空间科学与应用研究中心,2007.

[11] 田甲申.圆周SAR成像算法及相关技术[D].成都:电子科技大学,2013.

宋德鹏, 曲毅, 姜頔, 付凯城. 基于NUFFT的FMCW CSAR圆柱面场景成像波数域算法[J]. 电光与控制, 2017, 24(1): 24. SONG De-peng, QU Yi, JIANG Di, FU Kai-chenga. NUFFT Based ω-k Algorithm of FMCW CSAR for Cylindrical Reconstruction Areas[J]. Electronics Optics & Control, 2017, 24(1): 24.

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!