斜视模式SAR的子孔径算法分析及实现
Implementation and Analysis of Modified Subaperture Approach for Squint Mode Air-Borne SAR
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摘要: 该文根据传统的子孔径算法提出了适用于斜视情况的改进的子孔径算法，该算法可以明显改善图像的质量，并有助于自聚焦算法的收敛。同时，该文还提出了一种适用于该算法结构的自适应调整比例因子的图像域杂波锁定方法，可以大大加快收敛速度并提高收敛精度。该文还详细讨论了改进的子孔径算法对存储容量的要求，提出实时处理情况下的算法流程，分析了算法的计算量并与R-D算法做了相应比较。
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关键词:
- 子孔径算法; 自适应因子调整; 存储需求
Abstract: For processing the data of squint mode SAR, the modified subaperture approach based on classical real-time subaperture processing is presented in this paper. This new ap-proach can improve the image quality obviously and make the auto-focus processing converge better. At the same time, a new clutterlock algorithm of proportion factor self-adaptive in image field is introduced, which can improve the converging speed and the precision of result. In this paper, the memory requirements in the real-time processing procedures are discussed carefully. Finally, the amount of computing is analyzed and compared with that of the R-D algorithm. -
Moreira A. Real-time synthetic aperture radar processing with a new subaperture approach.IEEE Trans. on Geosci. and Remote Sensing, 1992, GRS-30(4): 714-722.[2]Curlander J C.[J].McDonough R N. Synthetic Aperture Radar Systems and Signal Processing, New York: John Wiley Sons, INC.1991,:-[3]张澄波. 综合孔径雷达原理, 系统分析与应用. 北京, 科学出版社, 1989: 24-37, 113-129.[4]Li F K, et al.. Doppler parameter estimation for spaceborne synthetic aperture radars[J].IEEE Trans. on Geosci. and Remote Sensing.1985, GE-23(1):47-55[5]黄永红.星载合成孔径雷达成像处理与运动补偿.[博士论文],北京:北京航空航天大学,1992:50-55. -
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