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首页> 外文期刊>IEEE Geoscience and Remote Sensing Letters >Invariant Contrast Parameters of PolInSAR Homogenous RVoG Model
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Invariant Contrast Parameters of PolInSAR Homogenous RVoG Model

机译:PolInSAR均匀RVoG模型的不变对比度参数

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摘要

It has been shown that the Cramer–Rao bound (CRB) can be helpful to characterize vegetation and ground height estimations based on the homogenous random volume over ground (RVoG) model and polarimetric interferometric SAR techniques. However, this model is a function of 20 unknown parameters, which makes the performance analysis a tedious task. We show that the group invariance property of the RVoG model can greatly reduce the complexity of the analysis since the CRB of the vegetation and ground heights only depends on four unknown parameters instead of 20. Furthermore, for the considered situations analyzed in this letter, only three of these four parameters have a nonnegligible influence and can be interpreted as contrast parameters.
机译:研究表明,基于均一的地面上随机体积(RVoG)模型和极化干涉SAR技术,克雷默-拉奥边界(CRB)有助于表征植被和地面高度。但是,此模型是20个未知参数的函数,这使性能分析成为一项繁琐的任务。我们表明,RVoG模型的组不变性可以极大地降低分析的复杂性,因为植被和地面高度的CRB仅取决于四个未知参数而不是20。此外,对于本信中所分析的情况,仅这四个参数中的三个具有不可忽略的影响,可以解释为对比度参数。

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