跟随模式BiSAR动目标成像

Imaging of Moving Target in the Tandem Geometry Bistatic SAR

机载双站合成孔径雷达(BiSAR)对地面运动目标的检测与成像是雷达成像技术中一个重要研究内容.当地面目标运动时,目标回波信号方位向多普勒频率发生变化,带来图像位置偏移和散焦等问题.文中给出了跟随模式的BiSAR几何结构,在此基础上建立了地面成像区域目标的运动模型,进而研究了目标的不同运动分量对BiSAR成像的影响和BiSAR对动目标的检测和成像技术,并给出了计算机仿真结果.

The detection and imaging of moving targets based on Bistatic SAR（BiSAR）is also a crucial technique,while the target is moving,the azimuth Doppler frequency changes,which results in position error and defocus phenomenon on imaging in BiSAR.Firstly,the tandem geometry configuration of Bistatic SAR and motion model of the target are given in this paper,and the influence of the motion of the target on the imaging of BiSAR is researched,then the technique of detection and imaging of moving targets based on BiSAR is achieved.Finally,the computer simulation results are presented.