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Circuits, Systems, and Signal Processing

, Volume 37, Issue 8, pp 3635–3650 | Cite as

Extraction of Phase Information from Magnitude-Only Bio-impedance Measurements Using a Modified Kramers–Kronig Transform

  • A. A. Al-Ali
  • A. S. Elwakil
  • B. J. Maundy
  • T. J. Freeborn
Article
  • 163 Downloads

Abstract

The need for portable and low-cost bio-impedance analyzers that can be deployed in field studies has significantly increased. Due to size and power constraints, reducing the hardware in these devices is crucial and most importantly is removing the need for direct phase measurement. In this paper a new magnitude-only technique based on modified Kramers–Kronig transforms is proposed and tested. Comparison with impedance measurements of fresh and aging tomato samples using a precise industry standard impedance analyzer is carried out and explained. Error and noise analysis of the proposed algorithm are also reported.

Keywords

Kramers–Kronig transform Bio-impedance Phase measurement 

Notes

Acknowledgements

The authors wish to acknowledge the support of the Natural Sciences and Engineering Research Council (NSERC, Canada) in the development of this work.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2017

Authors and Affiliations

  1. 1.Department of Electrical and Computer EngineeringUniversity of CalgaryCalgaryCanada
  2. 2.Department of Electrical and Computer EngineeringUniversity of SharjahSharjahUnited Arab Emirates
  3. 3.Nanoelectronics Integrated Systems Center (NISC)Nile UniversityCairoEgypt
  4. 4.Department of Electrical and Computer EngineeringUniversity of AlabamaTuscaloosaUSA

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