基于GTD模型的目标二维散射中心提取
doi: 10.3724/SP.J.1146.2007.01819
2D Scattering Centers Extraction of Objects Based on GTD Model
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摘要: 为精确描述隐身目标的高频电磁散射特性，该文用基于几何绕射理论的GTD模型代替以镜面散射为主的指数和模型。同时，为克服传统矩阵束算法(MEMP)计算量大、距离坐标配对等问题，该文提出用修正矩阵束算法和二维旋转不变技术(2D-ESPRIT)提取基于GTD模型的目标二维散射中心参数。仿真实验表明，该文的两种方法均适用于以边缘绕射等为主要散射源的隐身目标。Abstract: To describe accurately high frequency electromagnetic scattering of the stealthy object, the GTD model is introduced in this paper, instead of the DE model which is described the normal object mainly by studying their specular scattering. Traditional matrix pencil method needs large computational load and additional step of pairing. Therefore modified matrix pencil method and two dimensional (2D) ESPRIT method are proposed in this paper to extract the scattering centers based on GTD model to avoid these drawbacks. Simulations show that these two methods can be applied to the scatterers extraction from the stealthy objects whose main scattering centers are formed by the edge diffraction.
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