文章摘要
张羽,汪源源,王威琪,刘斌.超声多普勒信号降噪新方法的研究[J].声学技术,2000,(4):197~200
超声多普勒信号降噪新方法的研究
A novel method for Doppler ultrasound signal denoising
投稿时间:2000-04-28  修订日期:2000-08-28
DOI:
中文关键词: 小波变换  框架  软阈值  降噪
英文关键词: wavelet transform  frame  soft threshold  denoise
基金项目:国家自然科学基金项目(39800137)资助课题
作者单位
张羽 复旦大学电子工程系, 上海200433 
汪源源 复旦大学电子工程系, 上海200433 
王威琪 复旦大学电子工程系, 上海200433 
刘斌 复旦大学电子工程系, 上海200433 
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中文摘要:
      本文提出了利用离散小波框架结合软阈值的方法对超声多普勒信号进行降噪。通过对模拟多普勒信号和临床信号的降噪实验,发现利用小波框架的降噪方法可以获得比标准正交小波变换的降噪方法更好的降噪效果。
英文摘要:
      A novel method for Doppler ultrasound signal denoising was presented in this paper. In this method, the wavelet frame analysis was used together with the soft-thresholding algorithm. From the simulation studies and clinical cases, it was found that this method has a better performance than that by using the standard orthogonal wavelet transform (OWT).
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