摘要
针对机载三通道SAR-GMTI存在通道误差、运动误差等情况,提出了一种基于误差校正的SAR图像域动目标检测和定位方法。首先对接收通道误差、载机运动误差进行详细分析,给出相应的补偿方法,然后采用常规的DPCA和干涉处理技术有效地抑制杂波,精确地估计出地面动目标的真实方位和径向速度。外场实测结果验证了该误差校正方法的有效性和准确性。
Aiming at channel errors and motion errors appearing in the tri-channel SAR-GMTI, a method of detection and positioning for the moving ground targets is presented based on the error calibration. The receiv ing antenna （channel） errors and the radar platform motion errors are analyzed in detail and the corresponding compensation approaches are also proposed. The ground clutter can be suppressed validly and the true azimuth positions and radial velocities of the moving ground targets can be estimated correctly using displaced phase center antenna （DPCA） and interferometric processing techniques. The results obtained from field test show the efficiency of the proposed error calibration method.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2008年第6期1037-1042,共6页
Systems Engineering and Electronics
基金
国家自然科学基金资助课题(60502044)
关键词
SAR
通道误差
运动误差
动目标检测和定位
DPCA
SAR
channel errors
motion errors
moving ground target detection and position
displaced phase center antenna
