文章摘要
汪源源,刘斌,吴晓峰,王威琪.超声多普勒信号的频谱分析[J].声学技术,1998,(2):57~62
超声多普勒信号的频谱分析
Spectral analysis for Doppler ultrasound signals
投稿时间:1997-04-28  修订日期:1997-08-11
DOI:
中文关键词: 超声  多普勒  频谱分析
英文关键词: ultrasound  Doppler  spectral analysis
基金项目:上海市启明星计划
作者单位
汪源源 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 
吴晓峰 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 
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中文摘要:
      超声多普勒信号具有非平稳性,利用传统的短时傅里叶变换分析该信号不能同时得到较高的时间和频率精度,为克服这一缺点,本文简要介绍了多普勒信号频谱分析的几种新方法,并将它们和传统的方法进行性能的比较。
英文摘要:
      Doppler ultrasound signals are nonstationary. Analysis of these signals using the conventional short time Fourier transform could not lead to higher resolution both in time and frequency domain simultaneously. To overcome this shortcoming, several new spectral analysis methods are briefly described in this paper. Their performances are also compared with that of conventional method.
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