山东科学2017，Vol.30Issue(6)：71-78,8.DOI:10.3976/j.issn.1002-4026.2017.06.012
激光多普勒测速信号的小波包全局阈值消噪研究
Research on wavelet packet global threshold de-noising for laser Doppler velocimetry signal
张达 1刘让雷 2姚静2
作者信息
- 1. 青岛科技大学自动化与电子工程学院,山东青岛266061
- 2. 青岛科技大学机电工程学院,山东青岛266061
- 折叠
摘要
Abstract
The actual laser Doppler velocimetry signal mixed up much noise,so it was difficult to find the required Doppler frequency shift.In this paper,a wavelet packet global threshold de-noising method was proposed to solve this problem,which was also used to process Doppler velocimetry signal in MATLAB.According to the characteristics of the Doppler signal,through the selection of wavelet packet decomposition scale,the comparison of threshold estimation methods and the adjustment of threshold thr,the developed method could quickly and effectively eliminate the noise signal,improve the SNR and obtain useful signals.关键词
多普勒频移/全局阈值消噪/分解尺度/信噪比Key words
Doppler frequency shift/global threshold de-noising/decomposition scale/SNR分类
信息技术与安全科学引用本文复制引用
张达,刘让雷,姚静..激光多普勒测速信号的小波包全局阈值消噪研究[J].山东科学,2017,30(6):71-78,8.
