三通道SAR-GMTI误差校正方法的研究  

Study on the error calibration method for tri-channel SAR-GMTI

作　　者：吕孝雷[1] 苏军海[1] 邢孟道[1] 张守宏[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071

出　　处：《系统工程与电子技术》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)

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.

关 键 词：SAR 通道误差 运动误差 动目标检测和定位 DPCA 

分 类 号：TN957[电子电信—信号与信息处理]