湖南科技大学学报(自然科学版)
湖南科技大學學報(自然科學版)
호남과기대학학보(자연과학판)
JOURNAL OF HUNAN UNIVERSITY OF SCIENCE & TECHNOLOGY(NATURAL SCIENCE EDITION)
2014年
1期
84-87
,共4页
小波变换%降噪%阈值%matlab
小波變換%降譟%閾值%matlab
소파변환%강조%역치%matlab
wavelet transform%de-noising%threshold%matlab
论述了小波变换的一般理论和小波变换在信号降噪中的应用,比较了不同小波基、阈值和分解层数下的小波降噪结果。并在matab平台上仿真实现,利用信号噪声比(SNR)和均方根误差(RMSE)这2个评价指标评价小波降噪的效果。实验结果表明,小波变换在信号降噪中能取得较好的结果。
論述瞭小波變換的一般理論和小波變換在信號降譟中的應用,比較瞭不同小波基、閾值和分解層數下的小波降譟結果。併在matab平檯上倣真實現,利用信號譟聲比(SNR)和均方根誤差(RMSE)這2箇評價指標評價小波降譟的效果。實驗結果錶明,小波變換在信號降譟中能取得較好的結果。
논술료소파변환적일반이론화소파변환재신호강조중적응용,비교료불동소파기、역치화분해층수하적소파강조결과。병재matab평태상방진실현,이용신호조성비(SNR)화균방근오차(RMSE)저2개평개지표평개소파강조적효과。실험결과표명,소파변환재신호강조중능취득교호적결과。
The general theory of wavelet transform and the application of wavelet transform in signal de -noising were discussed.Different wavelet de -noising results with different wavelet bases,thresholds and decomposition level were compared .Matlab was used to carry out the simu1 ation.Signal to noise ratio (SNR) and root mean square error (RMSE )were used to evaluate the effect of wavelet de -noising.Experimental results show that,the wavelet transform obtain better results in signal de-noising.