基于距离模型的波数域算法

Wavenumber domain algorithm based on the range model

合成孔径雷达(SAR)存在四种距离模型,本文利用这四种模型推导出四种波数域算法,给出了四种算法详细的推导过程,并得到了四种算法和四种模型之间的一一对应关系。文章提出了单色等效斜视波数域算法,该算法不需要插值,因而提高了计算效率,适合于小斜视角且测绘带宽度不大的情况下的快速成像。最后利用该算法对星载SAR的实际数据进行成像,结果表明在成像精度牺牲不大的情况下可以大大提高成像速度。

Synthetic Aperture Radar has four range models, and four wavenumber domain algorithms are presented using the four models in this paper. The four algorithms are analyzed carefully in theory and mapped one-to-one with the four models. Monochromatic equivalent squint wavenumber domain algorithm is introduced which needs no interpolation so the calculation quality is decreased. The algorithm can be used when the squint angle and the bandwidth is small. The imaging result with the data of Spaceborne SAR demonstrates that the algorithm can meet the requirements of quick imaging in squint mode.