机载双站合成孔径雷达模糊函数分析

针对机载双站合成孔径雷达的几何构型，推导了任意构型双站SAR模糊函数的表达式。根据该表达式，对单站、平行双站和任意构型双站SAR系统的模糊函数进行了仿真分析。仿真结果表明：单站SAR的模糊函数仅由发射信号的带宽和天线尺寸决定，双站SAR的模糊函数受到其几何构型、接收机、发射机各自速度的影响，而且还和目标点的位置有关。仿真结果验证了该函数的正确性，为双站SAR的构型设计提供了依据。

Analysis of the ambiguity function for airborne bistatic SAR system

The ambiguity function formula is proposed based on the feature of bistatic synthetic aperture ra-dar (SAR), followed by the simulation analysis of the ambiguity function of the monostatic formation, parallel constellation bistatic and arbitrary formation bistatic. The results show the ambiguity function of monostatic SAR is decided by signal bandwidth and the size of antenna but the bistatic SAR system is influenced by the ge-ometry model and the velocity of platform. The example demonstrates the fact that bistatic geometry plays an important role in ambiguity function analysis,which provides principle for the selection of bistatic formation.