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Bioimpedance Parameter Estimation using Fast Spectral Measurements and Regularizaton
Universidad Nacional Autónoma de México. (Instituto de Ciencias Aplicadas y Tecnología)
Vrije Universiteit Brussel. (Department ELEC)
KTH, School of Electrical Engineering and Computer Science (EECS), Automatic Control.ORCID iD: 0000-0002-6322-7857
KTH, School of Electrical Engineering and Computer Science (EECS), Automatic Control.
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2018 (English)In: IFAC-PapersOnLine, IFAC Papers Online, 2018, Vol. 51, no 15, p. 521-526Conference paper, Published paper (Refereed)
Abstract [en]

This work proposes an alternative framework for parametric bioimpedance estimation as a powerful tool to characterize biological media. We model the bioimpedance as an electrical network of parallel RC circuits, and transform the frequency-domain estimation problem into a time constant domain estimation problem by means of the distribution of relaxation times (DRT) method. The Fredholm integral equation of the first kind is employed to pose the problem in a regularized least squares (RLS) form. We validate the proposed methodology by numerical simulations for a synthetic biological electrical circuit, by using a multisine signal in the frequency range of 1kHz to 853kHz and considering an error in variables (EIV) problem. Results show that the proposed method outperforms the state-of-the-art techniques for spectral bioimpedance analysis. We also illustrates its potentiality in terms of accurate spectral measurements and precise data interpretation, for further usage in biological applications.

Place, publisher, year, edition, pages
IFAC Papers Online, 2018. Vol. 51, no 15, p. 521-526
National Category
Bioengineering Equipment
Identifiers
URN: urn:nbn:se:kth:diva-256302DOI: 10.1016/j.ifacol.2018.09.198ISI: 000446599200089Scopus ID: 2-s2.0-85054370558OAI: oai:DiVA.org:kth-256302DiVA, id: diva2:1344214
Conference
18th IFAC Symposium on System Identification (SYSID), JUL 09-11, 2018,Stockholm Univ, AlbaNova Univ Ctr, Stockholm, SWEDEN
Note

QC 20190821

Available from: 2019-08-20 Created: 2019-08-20 Last updated: 2019-09-06Bibliographically approved

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Müller, Matias I.Mattila, Robert

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