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首页> 外文期刊>Geoscience and Remote Sensing Letters, IEEE >A New Numerical Method for Calculating Extrema of Received Power for Polarimetric SAR
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A New Numerical Method for Calculating Extrema of Received Power for Polarimetric SAR

机译：计算极化SAR接收功率极值的新数值方法

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摘要

A numerical method called cross-step iteration is proposed to calculate the maximal/minimal received power for polarized imagery based on a target's Kennaugh matrix. This method is much more efficient than the systematic method, which searches for the extrema of received power by varying the polarization ellipse angles of receiving and transmitting polarizations. It is also more advantageous than the Schuler method, which has been adopted by the PolSARPro package, because the cross-step iteration method requires less computation time and can derive both the maximal and minimal received powers, whereas the Schuler method is designed to work out only the maximal received power. The analytical model of received-power optimization indicates that the first eigenvalue of the Kennaugh matrix is the supremum of the maximal received power. The difference between these two parameters reflects the depolarization effect of the target's backscattering, which might be useful for target discrimination.
机译：提出了一种称为跨步迭代的数值方法，用于基于目标的Kennaugh矩阵计算极化图像的最大/最小接收功率。这种方法比通过改变接收和发送极化的极化椭圆角来搜索接收功率极值的系统方法更为有效。它也比PolSARPro软件包所采用的Schuler方法更具优势，因为跨步迭代方法需要较少的计算时间，并且可以导出最大和最小接收功率，而Schuler方法旨在计算仅最大接收功率。接收功率优化的分析模型表明，Kennaugh矩阵的第一个特征值是最大接收功率的最大值。这两个参数之间的差异反映了目标背向散射的去极化效应，这可能有助于目标识别。

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