摘要
介绍了小波变换理论,阐述了小波降噪原理、算法及3种噪声处理方法,概括描述了4种阈值规则的选取方法,以及在选用不同的小波基函数和分解层数对降噪效果的影响。在假设噪声为高斯白噪声的前提下,根据小波分解和重构法,对含噪信号进行降噪处理,并对GPS接收机得到的实测信号进行分析和效果比对。
The theory of wavelet analysis is introduced in the paper. The principle and calculation of wavelet denoise processing and three methods of noise processing are explained. The selection method of four liminal values is depicted and the influence on denoising effects when different wavelet radix function and decomposing layers are chosen. On the consumption that the noise is the Gaussian white noise, according to wavelet transform and reconstruction, the denoise processing is made and the actual signals received by the GPS receiver is analyzed and compared.
出处
《山东交通学院学报》
CAS
2012年第1期75-80,共6页
Journal of Shandong Jiaotong University
关键词
GPS
小波分析
降噪处理
GPS
wavelet analysis
denoise processing
