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基于矩阵拟合的InSAS干涉相位估计方法

DOI: 10.3969/j.issn.1006-7043.201404034

Keywords: 干涉合成孔径声呐, 相位估计, 联合协方差矩阵, 矩阵拟合, 信号子空间, 像素

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Abstract:

针对干涉合成孔径声呐相位估计问题,提出一种基于矩阵拟合的干涉相位估计方法。该方法通过构造联合观测数据矢量获取邻近像素的相干信息,通过对观测数据矢量对应的联合协方差矩阵进行拟合实现干涉相位的准确估计,优点是能够避免子空间分解类方法中存在的信号子空间扩散问题。所提方法通过给出干涉相位闭式解的形式,解决了角度搜索导致的大运算量问题。仿真和实测数据的处理结果证明了方法的有效性。

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