摘要
从ISAR成像原理出发,分析了散射点越距离单元走动(MTRC)对ISAR分辨率的影响,通过高分辨DFT数据矩阵求逆和AR模型进行方位谱数据外推;对不同的信噪比条件下,两种方法外推前后ISAR像的距离和方位分辨率及相关性作了比较分析。分析表明,方位谱外推的方法可在提高方位向分辨率的同时,有效地克服MTRC对距离向分辨率的降质,从而提高ISAR的成像质量。
From the analysis of range and cross resolutions of ISAR, the influence of MTRC on range resolution is discussed. Methods of high-resolution DFT extrapolation and AR model-based extrapolation are investigated methodologically. Through the comparison of range and cross section profiles obtained from 4 cross angular scopes at 6 different signal noise ratios, the simulation results show that two methods can improve cross resolution and-reduce the influence of MTRC on range resolution.
出处
《雷达科学与技术》
2006年第6期358-362,381,共6页
Radar Science and Technology
