匹配数据的平滑滤波技术

讨论了匹配测量数据的平滑，滤波和外推问题，所谓匹配测量数据是指位置参数和速度参数呈求导的匹配关系，提出了利用数据的匹配特性这一先验信息来改善多项式最小二乘滤波器的设计，对测量数据中的位置和测速数据进行统一处理，在最小方差意义下给出了平滑滤波公式及其效率方差比，由于充分利用了先验信息，减少了待估计参数的个数，显著提高了参数的估计精度，仿真计算结果表明该方法能显著改善目标运动参数的估计精度。

Smoothing and Filtering Technique for Matching Data

In the problem of smoothing, filtering and predicting matching data in aerospace measurement, matching data refers that velocity parameter is differential of position parameter. By using the prior information that measuring data are matching, the design of the polynomial least square filter is improved. The resulting smoothing filter equation processes position data and velocity data at the same time. Ratio of efficiency variance is also given. Because of using of prior information, the number of parameter to be estimated is reduced, and the parameter estimation accuracy is enhanced. Simulation results show that this method can improve the parameter estimation accuracy notably when target is maneuvering.