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根据地面动目标回波信号特性,研究了用于星载合成孔径雷达(SAR)的相位中心偏置天线(DPCA)、沿航迹干涉(ATI)、DPCA-Radon和DPCA-Frft-ATI等地面动目标检测(GMTI)算法。讨论了以实现GMTI为任务的分布SAR小卫星的构型和工作模式,分析了GMTI的最大可检测速度、最小可检测速度和盲速等系统指标,以及分布式SAR系统实现GMTI的难点。
According to the characteristics of moving target echo signal, the phase center antenna (DPCA), the track-based interference (ATI), DPCA-Radon and DPCA-Frft-ATI for the spaceborne synthetic aperture radar (SAR) Moving target detection (GMTI) algorithm. The configuration and working mode of the distributed small SAR satellite with the task of GMTI are discussed. The system parameters such as maximum detectable speed, minimum detectable speed and blind speed of GMTI are analyzed, and the difficulties of implementing GMTI for distributed SAR system are analyzed.