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个人信息Personal Information
教授
博士生导师
硕士生导师
性别：男
毕业院校：大连理工大学
学位：博士
所在单位：生物医学工程学院
学科：生物医学工程. 信号与信息处理
办公地点：大连理工大学电信学部
联系方式：tanghong@dlut.edu.cn
电子邮箱：tanghong@dlut.edu.cn
Noise and Disturbance Reduction for Heart Sounds in Cycle-Frequency Domain Based on Nonlinear Time Scaling
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论文类型：期刊论文
发表时间：2010-02-01
发表刊物：IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING
收录刊物：PubMed、SCIE、Scopus
卷号：57
期号：2
页面范围：325-333
ISSN号：0018-9294
关键字：Cycle-frequency domain; cyclic stationarity enhancement; disturbance reduction; heart sounds; noise reduction; nonlinear time scaling
摘要：Through an investigation of various clinical cases, heart sounds are found to be quasi-cyclostationary. Nonlinear time scaling from cycle-to-cycle is proposed to enhance cyclic stationarity, where nonlinear time scaling is approximated by a piecewise linear function. The techniques of cyclostationary signal processing are employed in this paper to reduce noise and disturbance in the cycle-frequency domain. Heart sounds can be theoretically recovered in the presence of additive, zero mean noise, and disturbance (perhaps non-Gaussian, nonstationary, or colored). The experimental tests in various conditions confirm the theoretical results.