合成孔径雷达轨迹误差的自适应校正算法(英文)  

Adaptive Correction Algorithm for SAR Trajectory Errors

作　　者：奥列格V·西特尼科 

机构地区：[1]A. Ya. Usikov Institute for Radio Physics and Electronics under the National Academy of Sciences of Ukraine, Kharkov , 61085, Ukraine

出　　处：《雷达科学与技术》2014年第1期1-7,共7页Radar Science and Technology

摘　　要：讨论了有关合成孔径雷达(SAR)地面图像轨迹失真的自适应校正问题。文中提出的方法属于自适应自聚焦方法中的一种,这种方法采用反射探测信号来纠正轨迹误差信息。将多普勒频谱位移及其高阶导数在斜距范围取平均得到的估值作为信息参数。这样就为建立这种自适应算法提供了可能,即它不仅能够自动校正飞行速度误差,而且还能够校正加速度和突跳误差。给出了SAR信号处理的结果,讨论了不同条件下信号处理的特性以及所提方法的实现结果。The problem of adaptive correction of the traj ectory distortions on the images of the earth surface,which are formed by a synthetic-aperture radar（SAR）,is discussed.The proposed method belongs to the classes of adaptive self-focusing methods,in which the information on traj ectory errors is retrieved from a reflected sounding signal.We have used the estimates of the Doppler spectrum displacement and its high derivatives averaged over the slant range as information parameters.It provided an opportunity to build the adaptive algorithm,which can automatically correct not only flight velocity errors,but also the accelera-tion and j ump errors as well.The results of SAR＆#39;s signal processing are presented.The features of signals processing under different conditions and implementation of the proposed method are discussed.

关 键 词：相干雷达 多普勒频谱 失真 轨迹误差 雷达地面图像 合成孔径雷达(SAR) 

分 类 号：TN958[电子电信—信号与信息处理] TN957[电子电信—信息与通信工程]