基于DBF-SCORE的Ka滑动聚束SAR信号处理方法研究

Ka毫米波合成孔径雷达（SAR）以其图像分辨率高目标轮廓清晰的特性，得到了国内外学者的广泛关注，近几年随着Ka波段器件的发展，Ka SAR系统成为各国竞相研究的热点。数字波束合成扫描接收技术（DBF‐SCORE）可以在避免峰值发射功率过大的前提下提供足够的系统增益，很好的解决了毫米波系统损耗较大的难题，而滑动聚束模式能够不受方位向天线尺寸的限制实现方位向的高分辨率。基于此本文提出了一种基于DBF‐SCORE的滑动聚束SAR工作模式，并给出了成像处理流程，以及信号处理过程中公式的解析表达式。最后，通过仿真实验验证了处理算法的有效性。

Ka band sliding spotlight SAR signal processing method based on DBF SCORE

Ka‐band millimeter‐wave SAR with high resolution and clear outline imaging characteristics has drawn great attention among researchers .With the development of Ka‐band devices ,makes Ka‐SAR system a hot research topic in many countries .Digital beam‐forming (DBF) scan‐on‐receve (SCORE) can avoid overlarge peak transmit power , meanwhile provides adequate system gain ,which efficiently solves the power consumption issue in millimeter‐wave systems .Besides ,sliding spotlight mode ensures the high azimuth resolution without restricting the size of the azimuth antenna .According to this , the paper presents a sliding spotlight SAR system based on DBF‐SCORE , and then provides the imaging flow diagrams ,as well as the analytical expressions .Finally ,the effectiveness of the algorithm is verified by simulation experiments .