%0 Journal Article
%T A modified algorithm for SAR parallel imaging
%A HU Ju-rong WANG Fei CAO Ning LU Hao
%A <br>HU Jurong
%A WANG Fei
%A CAO Ning
%A LU Hao
%J 重庆邮电大学学报(自然科学版)
%D 2009
%I 
%X Synthetic aperture radar can provide two dimension images by converting the acquired echoed SAR signal to targets coordinate and reflectivity. With the advancement of sophisticated SAR signal processing, more and more SAR imaging methods have been proposed for synthetic aperture radar which works at near field and the Fresnel approximation is not appropriate. Time domain correlation is a kind of digital reconstruction method based on processing the synthetic aperture radar data in the two-dimensional frequency domain via Fourier transform. It reconstructs SAR image via simply correlation without any need for approximation or interpolation. But its high computational cost for correlation makes it unsuitable for real time imaging. In order to reduce the computational burden a modified algorithm about time domain correlation was given in this paper. It also can take full advantage of parallel computations of the imaging processor. Its practical implementation was proposed and the preliminary simulation results were presented. Simulation results show that the proposed algorithm is a computationally efficient way of implementing the reconstruction in real time SAR image processing.
%K synthetic aperture radar
%K time domain correlation
%K modifid algorithm
%K parallel imaging process<br>合成孔径雷达
%K 并行算法
%K 雷达成像
%K 雷达信号处理
%K SAR图像
%K 雷达图像处理
%K 二维频域
%K 实时成像
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=01BA20E8BA813E1908F3698710BBFEFEE816345F465FEBA5&cid=96E6E851B5104576C2DD9FC1FBCB69EF&jid=5C2694A2E5629ECD6B59D7B28C6937AD&aid=8E7682440E1DA6FFE547A56F66997EC1&yid=DE12191FBD62783C&vid=659D3B06EBF534A7&iid=0B39A22176CE99FB&sid=866F8A6B640835A7&eid=273ADA1BCEFE8C00&journal_id=1673-825X&journal_name=重庆邮电大学学报(自然科学版)&referenced_num=0&reference_num=5