摘要
由于小波分析具有时频多分辨功能,小波去噪方法能在降噪的同时,更有效地保留有用信号。讨论小波阈值去噪中软阈值和硬阈值方法,然后针对硬阈值法不连续和软阈值法有偏差的缺点,研究一种有效的GPS动态变形监测数据的小波阈值降噪模型,并进行降噪实验,取得令人满意的结果。
Noise reduction method with wavelet can keep more useful information effectively when denoising the signal,because wavelet analysis has the function of time-frequency multi-solution.Based on noise reduction model with wavelet threshold value,a novel compromising method of the soft-and hard-threshold is developed to avoid the discontinuity caused by using the hard-thresholding model and the biased estimation caused by using the soft-thresholding model,and have the better results from experiment results.
出处
《测绘工程》
CSCD
2011年第5期18-21,共4页
Engineering of Surveying and Mapping
基金
国家教育部博士点基金资助项目(200802900501)
教育部博士点基金(新教师)资助项目(200802901516)
关键词
动态变形信号
小波阈值降噪
软硬阈值折衰法
dynamic deformation signal
wavelet threshold reduction
a compromising method of soft-and hard-threshold
