Title :
Mixing Frequency Bio-impedance Measurement Technology based on DFT and Virtual Reference Vector
Author :
Chao, Wang ; Chunyan, Huang ; Xiaoli, Zhang ; Huaxiang, Wang
Author_Institution :
Sch. of Electr. Eng. & Autom., Tianjin Univ., Tianjin
Abstract :
In order to obtain bio-impedance information at different frequency simultaneously, the bio-impedance measurement method in the condition of mixing frequency excitation is studied in this paper. The influence of energy leakage and fence effect of DFT to sine signal detection is analyzed, according to which the bio-impedance measurement technology based on DFT with virtual reference vector is presented. Finally, compensation of virtual reference vector is certificated by emulations and experiments. From the experimental results, the dynamic reaction of respiratory and cardiac activity in different frequency can be manifested according to the human impedance measurement.
Keywords :
bioelectric potentials; biomedical measurement; cardiology; discrete Fourier transforms; medical signal processing; DFT; bio-impedance measurement technology; cardiac activity; discrete Fourier transform; emulations; energy leakage; fence effect; mixing frequency excitation; respiratory dynamic reaction; sine signal detection; virtual reference vector; Biomedical measurements; Data mining; Demodulation; Dielectric measurements; Electric variables measurement; Frequency conversion; Frequency measurement; Impedance measurement; Sampling methods; Switches; Bio-impedance Measurement; Discrete Fourier Transform Demodulation; Dynamic Information Detection; Mixing frequency Excitation; Virtual Preference Vector;
Conference_Titel :
BioMedical Engineering and Informatics, 2008. BMEI 2008. International Conference on
Conference_Location :
Sanya
Print_ISBN :
978-0-7695-3118-2
DOI :
10.1109/BMEI.2008.126
