GTD散射模型参数解调耦估计技术

Decoulping Estimation Algorithm for Parameters in GTD Scattering Model

文中通过分析最大似然方法估计GTD散射模型参数的不足,提出了一种基于参数解耦的综合估计流程。首先利用矩阵束方法求得散射中心的距离参数,然后在对GTD散射模型近似处理的基础上提出了一种估计散射中心类型参数的新方法,最后利用线性最小二乘技术估计出散射中心幅度参数。实验结果表明综合估计算法能够较好地估计出散射中心参数。

After analyzing the drawbacks of maximum-likelihood method in estimating Geometrical Theory of Diffraction （GTD） scattering model parameters, an integrative estimation flow based on parameters decoupled is provided in this paper. Firstly, the range parameter of scattering centers is obtained by matrix-pencil method, and the type parameter of scattering centers is es- timated based on approximation of GTD scattering model, and then the amplitude parameter of scattering centers can be estimated bv least-sauares method. The experimental result shows the validity of the algorithm.