面向地面运动目标检测的SAR图像分辨率选取

摘要

在合成孔径雷达地面运动目标检测技术中,SAR图像分辨率的选取直接影响运动目标的检测性能.为此,该文提出一种适合于运动目标检测的SAR图像分辨率选取方案.结合感兴趣的目标大小从运动目标检测概率的角度出发,对不同SAR图像分辨率情况下运动目标的检测性能进行分析,以一种具有典型反射截面积的运动目标为例,给出不同目标尺寸条件下的最佳SAR图像分辨率.该方案可广泛应用于工程实践.%In the technique of ground moving target indication using SAR (SAR-GMTI), the image resolution has great impact on the target detection performance. A SAR image resolution selection scheme is proposed in this paper. Performance of target detection at different image resolutions is analyzed in view of the detection probability. Based on the analysis and taking a target with classical RCS as an example, optimal SAR resolution for different target size is given. Simulation results indicate that the scheme can be widely used in engineering practice.