外弹道测量数据的小波阈值去噪方法研究

Study on wavelet threshold de-noising method of exterior ballistic measurement data

针对外弹道测量数据的随机误差难以消除的问题,介绍了小波变换的理论,阐述了小波阈值消噪的基本原理,对硬阈值和软阈值函数的优缺点进行了对比分析,讨论了小波阈值去噪中阈值的选取方法,并将小波阈值去噪理论应用于外弹道测量数据的随机误差处理,以信噪比和均方误差为衡量指标,通过在不同阈值和不同阈值函数条件下的去噪效果的对比,研究了更适用于外弹道测量数据的小波阈值去噪方法。

Aiming at decreasing the random error of the exterior ballistic measurement data,in this paper,the theory of wavelet transform and the principles of the wavelet threshold de-noising are introduced.The characteristics of the hard threshold and the soft threshold are compared.The selection rules of the threshold value are discussed.Wavelet threshold de-noising methods with different threshold values and different threshold operations are used to the exterior ballistic measurement data,and the results are compared by SNR and MSE.The best wavelet threshold de-noising method for the exterior ballistic measurement data is researched.