Application of Two-Dimensional Time-Domain Correlation Method to Stepped-Frequency Radar Motion Compensation
A novel motion compensation method based on twodimensional time-domain correlation (2D-TC) function for stepped-frequency radar (SFR) is proposed to focus the range profile of SAR image in the condition of high target speed and low pulse repetition frequency (PRF).In such condition,serious pulse-topulse envelope shift of SFR echo greatly decreases the velocity-estimation performances of traditional motion compensation methods. The 2D-TC function of two returned bursts is insensitive to envelope shift,which indicates the target migration proportional to the target velocity in both the high and the low range resolution dimensions.Using a target model composed of multiple scatterers,the auto and the cross components of the 2D-TC function are deduced. The performance of joint velocity estimation using both dimensions is analyzed,which results in higher accuracy and wider unambiguous extent for highspeed target and low-PRF waveform.Statistical tests of typical methods are simulated and compared,and the results verify the validity of the new method.
Stepped-Frequency Radar High-Speed Target Low-PRF waveform Motion Compensation
Zuo Yanqin Zhu Yongfeng Zhao Hongzhong Fu Qiang
ATR Key Lab,National University of Defense Technology,Changsha,410073,China
国际会议
2009 2nd Asian-Pacific Conference on Synthetic Aperture Radar(第二届亚太合成孔径雷达会议)
西安
英文
412-416
2009-10-26（万方平台首次上网日期，不代表论文的发表时间）