具体分析了用于检测和定位运动目标的三端口SAR -MTI系统工作原理及性能。着重讨论了各种误差对检测和定位运动目标的影响 ,并对假设的雷达系统进行了计算机仿真。结果表明 ,在存在各种系统误差的条件下 ,系统仍具有良好的性能。由于是开环处理 ,这种系统具有较强的环境适应能力 ,同时处理所需的计算量和硬件设备量也不大 ,因此这种方法容易在工程上实现。 The working principle and performance of the three-port SAR-MTI system for detecting and locating moving targets are analyzed in detail. The effects of various errors on the detection and location of moving objects are mainly discussed. The computer simulation of the assumed radar system is carried out. The results show that the system still has good performance in the presence of various system errors. Because it is open-loop processing, this system has a strong environmental adaptability, while processing the required amount of computing and hardware equipment is not large, so this method easy to implement in engineering.