条带模式合成孔径激光雷达振动目标成像的计算与仿真

在光学波长的尺度上，几乎没有目标可被认为是静止的，因此，目标振动对合成孔径激光雷达（SAL）成像可能有较大影响。对此问题，基于衍射光学，建立了在目标作简谐振动的情况下，采用准单色光线性调频光源照明的条带模式SAL的成像数学方程，分析和讨论了目标振动参数对SAL成像的影响，并给出了若干数学仿真演示。结果表明，SAL成像对目标振动非常敏感，在距离方向上目标微小的振动可使SAL系统在方位向上产生一系列虚假像，严重影响SAL高分辨率成像的实现。

Abstract

In optical wavelength scale, any targets can be hardly regarded as stationary. Therefore, target vibration may affect synthetic aperture ladar (SAL) imaging severely. To address this problem, the imaging mathematical equation of strip-map mode SAL, in which quasi-monochromatic chirp laser is used as the illumination source in the situation of target vibrating, is set up. Using this equation, the effection of the vibration parameters is analyzed and discussed, and some simulations for this are performed. The result shows that SAL imaging is extremely sensitive to the target vibration. Tiny target vibration in range may bring a series of false images in azimuth to the final SAL image and seriously affect the realization of a high resolution SAL imaging.

参考文献

[1] M. Bashkansky, R. L. Lucke, E. Funk. Two-dimensional synthetic aperture imaging in the optical domain ［J］. Opt. Lett., 2002, 27(22): 1983～1985

[2] S. M. Beck, J. R. Buck, W. F. Buell et al.. Synthetic-aperture imaging ladar: laboratory demonstration and signal processing ［J］. Appl. Opt., 2005, 44(35): 7621～7629

[3] J. R. Buck, B. W. Krause, A. I. R. Malm et al.. Synthetic aperture imaging at optical wavelengths [C]. Conference on Laser and Electro-Optics/International Quantum Electronics, OSA, 2009. PHhB3

[4] B. W. Krause, J. Buck, C. Ryan et al.. Synthetic aperture ladar flight demonstration [C]. CLEO-Laser Application to Photonic Applications, OSA, 2011. PDPB7

[5] 周煜, 许楠, 栾竹等. 实验室合成孔径激光雷达点目标二维成像实验［J］. 光学学报, 2009, 29(2): 566～568

Zhou Yu, Xu Nan, Luan Zhu et al.. Two-dimensional imaging experiment of a point target in a laboratory-scale synthetic aperture imaging ladar ［J］. Acta Optica Sinica, 2009, 29(2): 566～568

[6] 刘立人, 周煜, 职亚楠等. 大口径合成孔径激光雷达成像雷达演示样机及其实验室验证［J］. 光学学报, 2011, 31(9): 0900112

Liu Liren, Zhou Yu, Zhi Ya′nan et al.. A large aperture synthetic aperture imaging ladar demonstrator and its verification in laboratory space [J]. Acta Optica Sinica, 2011, 31(9): 0900112

[7] 邢孟道, 郭亮, 唐禹等. 合成孔径激光雷达实验系统设计［J］. 红外与激光工程, 2009, 38(2): 290～294

Xing Mengdao, Guo Liang, Tang Yu et al.. Design on the experiment optical system of synthetic aperture imaging ladar ［J］. Infrared and Laser Engineering, 2009, 38(2): 290～294

[8] W. Buell, N. Marechal, J. Buck et al.. Demonstrations of synthetic aperture imaging ladar [C]. SPIE, 2005, 5791: 152～166

[9] 洪光烈, 郭亮. 角振动对合成孔径激光雷达成像的影响 [J]. 红外与毫米波学报, 2011, 30(6): 571～576

Hong Guanglie, Guo Liang. Effects of angle vibration on imaging quality of synthetic aperture ladar [J]. J. Infrared Millim. Waves, 2011, 30(6): 571～576

[10] 李增局, 吴谨, 刘国国等. 振动影响机载合成孔径激光雷达成像初步研究［J］. 光学学报, 2010, 30(4): 994～1001

Li Zengju, Wu Jin, Liu Guoguo et al.. Preliminary investigation on airborne SAL imaging with platform vibration ［J］. Acta Optica Sinica, 2010, 30(4): 994～1001

[11] 吴谨. 合成孔径激光雷达成像之匹配滤波器［J］. 光学学报, 2010, 30(7): 2123～2129

Wu Jin. Matched filter in synthetic aperture ladar imaging［J］. Acta Optica Sinica, 2010, 30(7): 2123～2129

[12] 赵美静, 吴谨, 朱炳祺. 随机相位误差影响条带模式合成孔径激光雷达成像的数学模拟 [J]. 红外与激光工程, 2011, 40(12): 2418～2423

Zhao Meijing, Wu Jin, Zhu Bingqi. Mathematical simulation on stripmap mode synthetic aperture ladar imaging with random phase errors [J]. Infrared and Laser Engineering, 2011, 40(12): 2418～2423

[13] 中国人民解放军总装备部GJB 150.16-86，国家军用标准环境I［S］. 国防科工委军标出版发行部, 1992. 132～133

The General Reserve Department of CPLA. GJB 150.16-86，National Military Standard for Environment I［S］. Military Standard Press for Chinese Defense Advanced Research Projects Agency, 1992. 132～133

[14] 奚定平. 贝塞尔函数 [M]. 北京: 高等教育出版社, 1998

Xi dingping. Bessel Functions [M]. Beijing: High Education Press, 1998

[15] W. G. Carrara, R. S. Goodman, R. M. Majewski. Spotlight Synthetic Aperture Radar: Signal Processing Algorithms [M]. Norwood, MA: Artech House, 1995. 386～399

[16] T. J. Karr. Synthetic aperture ladar resolution through turbulence [J]. J. Opt. Soc. Am. A, 2003, 20(6): 1067～1083

赵志龙, 吴谨, 李斐斐, 杨兆省. 条带模式合成孔径激光雷达振动目标成像的计算与仿真[J]. 光学学报, 2012, 32(8): 0828006. Zhao Zhilong, Wu Jin, Li Feifei, Yang Zhaosheng. Calculations and Simulations on Vibrating Targets Imaging in Strip-Map Mode Synthetic Aperture Ladar[J]. Acta Optica Sinica, 2012, 32(8): 0828006.

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