Multifrequency bio-impedance measurement:: undersampling approach

被引：0

作者：

Märtens, O ^{[1
]}

Min, M ^{[1
]}

机构：

[1] Tallinn Univ Technol, Dept Elect, EE-19086 Tallinn, Estonia

来源：

NORSIG 2004: PROCEEDINGS OF THE 6TH NORDIC SIGNAL PROCESSING SYMPOSIUM | 2004年 / 46卷

关键词：

D O I：

暂无

中图分类号：

TP18 [人工智能理论];

学科分类号：

081104 ; 0812 ; 0835 ; 1405 ;

摘要：

For digital measurement of slowly changing modulation waveforms, e.g. electrical bio-impedance (EBI) variations of several higher frequency carriers simultaneously, the undersampling approach allows to extend the range of carrier frequencies significantly beyond the Nyquist limit, and to reduce the computational power at the same time. Basic equations for choosing of signal and sampling frequencies are found An example solution is proposed, and analyzed by MATLAB simulation for further implementations on some real DSP-platform. In the simulated example, the 1 Hz EBI variation and 15,059 ks/s sampling rate in the case of 4 kHz and 64 kHz carriers were used.

引用

页码：145 / 148

页数：4

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