【摘要】 基于分数阶傅里叶变换(FrFT)和多通道杂波抑制干涉技术,提出一种同步轨道星机双基地SAR地面慢速运动目标检测和参数估计方法。首先根据同步轨道星机双基地SAR的特点,给出该模式下杂波对消的DPCA条件;然后从系统空间几何模型和回波信号入手,详细推导了动目标聚焦成像、杂波抑制、动目标检测和参数估计的原理,最后通过计算机仿真,验证了该文算法的有效性。更多还原

【Abstract】 Based on Fractional Fourier Transform (FrFT) and clutter suppression interferometer techniques, a method of detecting slow-moving ground targets with Geosynchronous Earth Orbit (GEO) spaceborne-airborne bistatic three-aperture Synthetic Aperture Radar (SAR) is presented. Firstly, based on the characteristic of GEO spaceborne-airborne bistatic SAR, the DPCA condition of clutter suppression is derived. Then from the spatial geometry model and echo signal of the system, the theory of moving target focusing, clutter suppression, moving target detection and parameter estimation is derived in detail. Finally, computer simulation results validate its effectiveness.更多还原