文献类型：会议

作　　者：王国栋

作者单位：北京交通大学电子信息工程学院电磁兼容实验室

会议文献：2004 4～(th) International Conference on Microwave and Millimeter Wave Technology Proceedings

会议名称：第四届国际微波与毫米波技术会议

会议日期：20040800

会议地点：Beijing,China

主办单位：Chinese Institute of Electronics(CIE)

出版单位：PublisherChineseInstitute...

出版日期：20040800

学会名称：中国电子学会

语　　种：中文

摘　　要：＜正＞Based on Two-Step algorithm and Chirp Scaling algorithm, a Deramp Chirp Scaling （DCS） algorithm for processing high-resolution spacebome spotlight synthetic aperture radar （SAR） data is presented. The algorithm combines the advantages of SPECAN algorithm and Chirp Scaling algorithm. Firstly, the azimuth coarse focusing is achieved via a deramp processing with constant Doppler rate, and the azimuth spectral folding phenomenon,which is typical for spaceborne spotlight SAR,was overcome. Secondly, the precise range focusing is achieved by Chirp Scaling principle,and the residual azimuth phase enor is compensated, so the refined azimuth focusing is acquired. Based on the squinted equivalent range model that is fitter for spaceborne geometrical relation than the broadside range model, the complete derivation of the algorithm is presented and the realizing approach is given. Finally, the computer simulation shows the validity of the algorithm.

关 键 词：Synthetic aperture radar  Rada（?） imaging  ALGORITHM

分 类 号：TN957.51]