摘要
提出了一种适用于平移不变模式双基地SAR(Bi-SAR)的级联成像方法.首先利用平移不变Bi-SAR的几何关系,对其方位多普勒频率进行分解,得出了一种新的平移不变Bi-SAR频域点目标响应表达式.基于该表达式,将平移不变Bi-SAR回波信号方位向的分析和处理分解为两个独立的单程单基地SAR点目标响应处理过程,简化了平移不变Bi-SAR的系统分析和信号处理,而且该方法有利于将单基地算法向双基地的移植和算法的工程实现.仿真试验验证了级联成像方法对平移不变Bi-SAR目标回波成像的有效性.
A cascade imaging approach for translational invariable bistatic synthetic aperture radar（SAR） was presented. Firstly, a new reference spectrum of translational invariable Bi-SAR point target was obtained on the basis of the division of the azimuth frequency according to its geometry. Based on this reference spectrum, the analysis and processing of the translational invariable Bi-SAR signals in azimuth could be divided into two one-way monostatic SAR signal processing steps in series. Furthermore, this method was of advantage to the translation from monostatic SAR algorithm to bistatic domain and the application of bistatic SAR imaging algorithm. Finally, the computer simulation verified the validity of the approach presented in this paper.
基金
国家自然科学基金(60672140
60672139)资助
