统计推断约束下响应曲线的自适应Padé插值逼近  

Adaptive,accurate and fast approximation of response curve using the Padé interpolation and statistic inference

作　　者：许锋[1] 洪伟[1] 

机构地区：[1]东南大学国家毫米波重点实验室,江苏南京210096

出　　处：《电波科学学报》2002年第3期245-249,共5页Chinese Journal of Radio Science

摘　　要：采用Pad啨插值技术 ,对计算获得的、稀疏的响应点值进行逼近 ,然后用获得的有理逼近式计算宽范围内响应曲线。把最小二乘法和插值技术结合起来 ,充分利用已有信息、达到最佳逼近的效果。同时自适应和精确地逼近响应曲线 ,引入了统计推断的办法。在统计推断的约束和判断下 ,实现了自适应的Pad啨插值逼近思煅榉椒ǖ恼沸?,应用了混合插值技术 ,对FDTD法计算获得的、稀疏的RCS频率和角度响应曲线进行了逼近 ,在统计推断办法的约束和判断下 。In the paper, by use of results at some points, which are obtained using FDTD method, the rational function of the response curve can be achieved. Then the whole response curve can be calculated by use of the rational function. The least square method is adopted to perform overall approximation. By means of the hypothesis testing method, the response curve can be obtained adaptively and accurately. In this paper, the wide angle mono static RCS pattern and wide frequency RCS pattern of an arbitrarily shaped two dimensional large cylinder is approximated using the presented method. A good agreement is observed.

关 键 词：统计推断 响应曲线 自适应 Pade插值逼近 渐近波形估计 插值计算 最小二乘法 FDTD 

分 类 号：O241.3[理学—计算数学]