斜視模式SAR的子孔徑算法分析及實(shí)現(xiàn)
Implementation and Analysis of Modified Subaperture Approach for Squint Mode Air-Borne SAR
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摘要: 該文根據(jù)傳統(tǒng)的子孔徑算法提出了適用于斜視情況的改進(jìn)的子孔徑算法，該算法可以明顯改善圖像的質(zhì)量，并有助于自聚焦算法的收斂。同時(shí)，該文還提出了一種適用于該算法結(jié)構(gòu)的自適應(yīng)調(diào)整比例因子的圖像域雜波鎖定方法，可以大大加快收斂速度并提高收斂精度。該文還詳細(xì)討論了改進(jìn)的子孔徑算法對(duì)存儲(chǔ)容量的要求，提出實(shí)時(shí)處理情況下的算法流程，分析了算法的計(jì)算量并與R-D算法做了相應(yīng)比較。
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關(guān)鍵詞:
- 子孔徑算法; 自適應(yīng)因子調(diào)整; 存儲(chǔ)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]張澄波. 綜合孔徑雷達(dá)原理, 系統(tǒng)分析與應(yīng)用. 北京, 科學(xué)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]黃永紅.星載合成孔徑雷達(dá)成像處理與運(yùn)動(dòng)補(bǔ)償.[博士論文],北京:北京航空航天大學(xué),1992:50-55. -
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