ISAR快速CBP成像算法研究

Research on Fast CBP Algorithm for ISAR Imaging

对应用于逆合成孔径雷达(Inverse Synthetic Aperture Radar,ISAR)成像中的卷积反投影(Convolution Back Projection,CBP)算法进行了研究。提出了一种改进的CBP算法,通过一次一维平移插值即可完成CBP算法中所有的插值工作。在此基础上,对大场景采用分块并行处理。通过FEKO中目标仿真数据的成像表明,改进算法的成像效率远高于常规CBP算法。

Convolution back projection( CBP) algorithm for inverse synthetic aperture radar( ISAR) imaging is studied in this paper. An improved CBP algorithm is proposed,by which the whole interpolation work can be completed in a single one-dimensional( 1- D) shifted interpolation. Based on this,a large scene can be divided into small scenes and processed in parallel. From the ISAR images using FEKO simulated data,it is demonstrated that the improved CBP algorithm is far more efficient than the conventional method.