Estimating Cole-Impedance Parameters from Limited Frequency-Band Impedance Measurements

Particle-swarm optimization is applied to estimate the parameters of 4 different Cole-impedance models using impedance measurements limited to frequencies within 1 kHz to 1 MHz, representative of typical ranges for bioimpedance applications. The accuracy of extracted parameters are compared for case...

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Bibliographic Details
Main Authors: Freeborn, Todd J., Critcher, Shelby
Format: Conference Proceeding
Language:English
Subjects:
Atmospheric measurements
Estimation
Frequency estimation
Impedance measurement
Integrated circuits
Measurement uncertainty
Particle measurements
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Summary:Particle-swarm optimization is applied to estimate the parameters of 4 different Cole-impedance models using impedance measurements limited to frequencies within 1 kHz to 1 MHz, representative of typical ranges for bioimpedance applications. The accuracy of extracted parameters are compared for cases with N = 201, 25, and 5 datapoints collected using a Keysight E4990A impedance analyzer and N = 8 collected using a MAX30001 integrated circuit. The Cole-impedance estimations using the 201 and 25 frequency datasets show < 0.5% relative error compared to the ideal values. Estimations using 5 and 8 frequency datasets do show significant deviations when measurements do not capture plateauing impedance regions at low and high frequency.
ISSN:2473-4667
DOI:10.1109/LASCAS51355.2021.9459167