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Extended chirp scaling algorithm for high squint mode SAR with range-walk correction in time domain


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Extended chirp scaling algorithm for high squint mode SAR with range-walk correction in time domain
Liu Feng1Mu Shanxiang1Li Wenliang1Li Yugang1Yang Zuoxiang2 Zhai Xiaohan2
1.School of Electronic Engineering and Optoelectronic Technology,NUST,Nanjing 210094,China; 2.No 73908 Unit of PLA,Nanjing 210037,China
synthetic aperture radars range-walk correction high squint modes extended chirp scaling algorithm
In view of that the conventional chirp scaling algorithm can not satisfy the high squint mode and the simultaneousness,a generalized approach based on the extended chirp scaling algorithm is presented here.The echo features are derived and analysed thoroughly,the range-walk is removed in time domain,the imaging work using the extended chirp scaling algorithm is carried out,and the implementation of this approach is demonstrated.The results show that the range walk is corrected by simple phase multiplying with appropriate arithmetic quantum and the method is feasible and effective.


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Last Update: 2013-10-31