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Comparison of ISAR Resolution Improvement Based on Two Cross Spectra Extrapolations
Author(s): LI Bing, CI Lin-lin, WAN Jian-wei, YAO Kang-ze, WANG Yan
Pages: 358-
362,381
Year: 2006
Issue:
6
Journal: RADAR SCIENCE AND TECHNOLOGY
Keyword: 谱外推; ISAR像分辨率; AR模型; 高分辨DFT; 越距离单元走动;
Abstract: 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.
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