Very Low Resource Digital Implementation of Bioimpedance Analysis

Sensors
Fabien SoulierTristan Rouyer

Abstract

Bioimpedance spectroscopy consists of measuring the complex impedance of biological tissues over a large frequency domain. This method is particularly convenient for physiological studies or health monitoring systems. For a wide range of applications, devices need to be portable, wearable or even implantable. Next generation of bioimpedance sensing systems thus require to be implemented with power and resource savings in mind. Impedance measurement methods are divided into two main categories. Some are based on "single-tone" signals while the others use "multi-tone" signals. The firsts benefit from a very simple analysis that may consist of synchronous demodulation. However, due to necessary frequency sweep, the total measurement may take a long time. On the other hand, generating a multi-frequency signal allows the seconds to cover the whole frequency range simultaneously. This is at the cost of a more complex analysis algorithm. This makes both approaches hardly suitable for embedded applications. In this paper, we propose an intermediate approach that combines the speed of multi-tone systems with a low-resource analysis algorithm. This results in a minimal implementation using only adders and synchronous adc. For optimal per...Continue Reading

References

Aug 1, 1993·IEEE Transactions on Bio-medical Engineering·R Pallás-Areny, J G Webster
Jan 1, 1957·Advances in Biological and Medical Physics·H P SCHWAN
Dec 21, 2004·IEEE Transactions on Bio-medical Engineering·Peter AbergStig Ollmar
Feb 3, 2007·Conference Proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society·M MinA Ronk
Sep 16, 2015·IEEE Transactions on Biomedical Circuits and Systems·Saul RodriguezAna Rusu
Nov 16, 2016·IEEE Transactions on Biomedical Circuits and Systems·Tse-An ChenBin-Da Liu

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