北京航空航天大学学报 ›› 2008, Vol. 34 ›› Issue (01): 92-95.

• 论文 • 上一篇    下一篇

一种二维干涉综合孔径辐射计近场成像算法

胡岸勇,柳重堪,苗俊刚,万国龙   

  1. 北京航空航天大学 电子信息工程学院, 北京 100083
  • 收稿日期:2007-01-25 出版日期:2008-01-31 发布日期:2010-09-17
  • 作者简介:胡岸勇(1980-),男,湖南娄底人,博士生,hay800906@126.com.
  • 基金资助:

    教育部"新世纪优秀人才支持计划"资助项目;国家自然科学基金资助项目(40476061)

Near-filed imaging method of two-dimension interferometric synthetic aperture radiometer

Hu Anyong, Liu Chongkan, Miao Jungang, Wan Guolong   

  1. School of Electronics and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
  • Received:2007-01-25 Online:2008-01-31 Published:2010-09-17

摘要: 提出了一种基于相位补偿的二维干涉综合孔径辐射计近场成像算法.从干涉综合孔径辐射计的成像原理和近场应用情况出发,分析了快速傅里叶变换(FFT,Fast Fourier Transform)反演算法在近场条件下存在的问题,并采用相位补偿的方法,提出了一种近场数值反演算法.对点目标用FFT算法和近场成像算法进行了成像仿真,仿真结果表明近场成像算法比FFT算法具有更高的空间分辨率.用一套8mm波段二元干涉综合孔径辐射计对人工双点源场景进行了成像实验,实验结果证明了该近场算法的有效性.

Abstract: A near-field imaging method of two-dimension interferometric synthetic aperture radiometer was presented. Based on the principle of the two-dimension interferometric synthetic aperture radiometer and the near-field condition, the shortcomings of FFT(fast Fourier transform) imaging method were analyzed, and a near-filed numerical imaging method by phase compensating was proposed. The imaging simulation of single point-target by FFT reverse algorithm and the near-filed reverse algorithm were carried out respectively. The simulation results show that the near-filed reverse algorithm has better resolution than FFT reverse algorithm. The imaging experiment of two separate man-made points with these two methods was accomplished, and the experiment results prove that the near-field imaging method is valid.

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