摘要
利用小波多分辨率分析的特点和分形噪声在小波变换域的特性,采用小波变换域参数估计方法获得噪声参数,然后采用小波阈值滤波方法去除噪声,并比较了三种小波基不同的滤波效果。通过仿真试验,陀螺的零漂值从0．3755°／h减小到了0．1026°／h。
Based on the specialty of multl-resolutlon analysis of wavelet and fractal noises in wavelet transform domain, parameter estimation in wavelet transform is applied to obtain parameters of noises, Threshold value filtering method is used to eliminate noises. By eomparing the different results using several basic wavelets, the feasibility of this denoising algorithm is verified.
出处
《光学与光电技术》
2006年第3期53-55,共3页
Optics & Optoelectronic Technology
关键词
激光陀螺
分形噪声
小波变换
阈值滤波
fraetal noises
ring laser gyro
wavelet transform
threshold-value filtering
