Fractional Fourier Transform for Moving Target Detection and Location in Spaceborne SAR

摘要：

Doppler parameter estimation of Azimuth echo is the key for Synthetic Aperture Radar (SAR)ground moving target detection.This paper will apply Fractional Fourier Transform (FrFT)to moving target echo signals for Doppler parameter estimation in Spaceborne SAR.It s well known that within a synthetic aperture time,the relative motion between moving targets and SAR makes the slant range vary with time so that Doppler parameters will change accordingly.Compute the mean values of the gained Doppler centroid and frequency modulation rate along azimuth direction for each target,and this ensures that echoes of a moving target may be approximated by a linear frequency modulation (LFM)signal in theory.Simulation results prove that the parameter mean values can make imaging quality of moving targets better and achieve accurate real timeprocessing within a synthetic aperture time.

关键词： Synthetic Aperture Radar (SAR) Fractional Fourier Transform (FrFT) moving target detection Doppler parameter estimation

作者: Shujuan Peng Debao Ma Jianlin Lin

作者单位: Zhengzhou Information Science and Technology Institute No.830 Box 1001 Zhengzhou,450002,P.R.China

会议类型: 国际会议

会议名称: 2008 IEEE International Conference on Onformation and Automation(IEEE 信息与自动化国际会议)

会议地点: 张家界

会议语种:英文

页码: 485-488

在线出版日期: 2008-06-20（万方平台首次上网日期，不代表论文的发表时间）