基于白噪声正交多项式滤波的GPS测速方法分析

Analysis of GPS Velocimetry Method Based on White Noise Orthogonal Polynomial Filtering

针对目前GPS精度鉴定系统事后数据处理中速度精度偏低,难以满足试验任务需求的问题,结合试验中GPS数据具有等间隔、高采样率的特点,基于GPS测速的基本原理,利用位置微分求速方法,设计了采用白噪声正交多项式最优线性滤波的中心平滑求速方法,使GPS测速精度达到0.01 m/s,提高了GPS精度鉴定系统的测速性能指标。

Aimed at the problem of low velocity precision in follow-up data processing of GPS precision identification sys- tem now, which could not meet the demand of testing task, we designed central smoothing method for speed computing by or- thogonal polynomials optimal linear filtering of white noise, which combined equally spaced and high sampling rate GPS da- ta in the task, making use of location differential for velocity computing and based on the basic principle of GPS velocity measuring. This method enhaneed velocity precision to reach 0.01meter per second, improving velocity measuring perfor- mance indicators of GPS precision identification system.