Ships Imaging Based on the Fractional Autocorrelation

摘要：

Due to the noncooperative motions of maneuvering target,as ships,the Doppler shifts of scatterers are usually timevarying,so that the Range-Doppler algorithm becomes incapable to form synthetic aperture radar (SAR) imaging.The echo embodying such maneuvering targets is approximated as multicomponents chirp signal.Thus,Doppler estimation for multicomponents chirp is needed in Range-Instantaneous-Doppler imaging for maneuvering targets.To imaging noncooperative ship target at sea,a new algorithm based on fractional autocorrelation was presented in this paper.The echo from every range cell was correlated by the rotating operator in the timefrequency plane.And the doppler parameters of target were estimated accurately to get fine images,by searching the peak value in the fractional domain.The approach is verified by Radarsat data.

作者: Zhang Yun Jiang Yi-cheng Zong Cheng-ge Lu Ya-dong

作者单位: Research Institute of Electronic Engineering Technology,Harbin Institute of Technology,Harbin,150001 Institute of Spacecraft System Engineering,China Academy of Space Technology,Beijing,100094,China

会议类型: 国际会议

会议名称: 第八届电磁理论、天线及传播国际研讨会

会议地点: 昆明

会议语种:英文

在线出版日期: 2008-11-01（万方平台首次上网日期，不代表论文的发表时间）