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中文摘要：
在研究全局最小熵距离对准算法的基础上,结合了亚距离单元对准方法,并通过分析回波相关性对原算法的影响,提出了一种改进型全局最小熵算法。该算法可分为距离像分块对准和亚距离单元对准两部分。本文通过对回波相关性的分析,利用距离像分块对准改善了原算法距离对准的准确性;并通过亚距离单元对准提高了原算法距离对准的精度。实测数据处理结果表明,改进型算法具有较高的距离对准精度,从而提高了成像质量。
英文摘要：
Range alignment is a key procedure in inverse synthetic aperture radar（ISAR） imaging.Based on the global minimum entropy range alignment algorithm,an improved range alignment algorithm is proposed according to the subinteger range-bin method by analyzing the influence of correlation between echoes on the original algorithm.Range profile blocking scheme and subinteger range-bin alignment method are applied to the proposed algorithm.Range profile blocking scheme and subinteger range-bin alignment method improve the accuracy and the precision of the original algorithm,respectively.The real data processing result shows that the algorithm improves the accuracy of range alignment and hence improves the imaging quality of ISAR.
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同项目期刊论文
Range Doppler Algorithm for bistatic SAR processing based on the improved loffeld's bistatic formula
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