Bibliographic Details
| Title: |
Noise and Disturbance Reduction for Heart Sounds in Cycle-Frequency Domain Based on Nonlinear Time Scaling. |
| Authors: |
Hong Tang1 tanghong@dlut.edu.cn, Ting Li2 tarali78@hotmail.com, Tianshuang Qiu1 qiutsh@dlut.edu.cn |
| Source: |
IEEE Transactions on Biomedical Engineering. Feb2010, Vol. 57 Issue 2, p325-333. 9p. 3 Black and White Photographs, 3 Charts, 12 Graphs. |
| Subjects: |
Cyclostationary waves, Heart sounds, Digital signal processing, Diastole (Cardiac cycle), Cardiac contraction |
| Abstract: |
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. [ABSTRACT FROM AUTHOR] |
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| Database: |
Engineering Source |
