Observer-Based deconvolution of deterministic input in coprime multichannel systems with its application to noninvasive central blood pressure monitoring

Zahra Ghasemi, Woongsun Jeon, Chang Sei Kim, Anuj Gupta, Rajesh Rajamani, Jin Oh Hahn

Research output: Contribution to journalArticlepeer-review

Abstract

Estimating central aortic blood pressure (BP) is important for cardiovascular (CV) health and risk prediction purposes. CV system is a multichannel dynamical system that yields multiple BPs at various body sites in response to central aortic BP. This paper concerns the development and analysis of an observer-based approach to deconvolution of unknown input in a class of coprime multichannel systems applicable to noninvasive estimation of central aortic BP. A multichannel system yields multiple outputs in response to a common input. Hence, the relationship between any pair of two outputs constitutes a hypothetical input-output system with unknown input embedded as a state. The central idea underlying our approach is to derive the unknown input by designing an observer for the hypothetical input-output system. In this paper, we developed an unknown input observer (UIO) for input deconvolution in coprime multichannel systems. We provided a universal design algorithm as well as meaningful physical insights and inherent performance limitations associated with the algorithm. The validity and potential of our approach were illustrated using a case study of estimating central aortic BP waveform from two noninvasively acquired peripheral arterial pulse waveforms. The UIO could reduce the root-mean-squared error (RMSE) associated with the central aortic BP by up to 27.5% and 28.8% against conventional inverse filtering (IF) and peripheral arterial pulse scaling techniques.

Original languageEnglish (US)
Article number142-9_A6_06
JournalJournal of Dynamic Systems, Measurement and Control, Transactions of the ASME
Volume142
Issue number9
DOIs
StatePublished - Sep 1 2020
Externally publishedYes

Bibliographical note

Funding Information:
• National Science Foundation (NSF) (Grant No. CMMI-1431672; Funder ID: 10.13039/100000001). • National Institutes of Health (NIH) (Grant No. EB018818; Funder ID: 10.13039/100000002).

Funding Information:
Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the NSF and NIH. National Science Foundation (NSF) (Grant No. CMMI-1431672; Funder ID: 10.13039/100000001). National Institutes of Health (NIH) (Grant No. EB018818; Funder ID: 10.13039/100000002).

PubMed: MeSH publication types

  • Journal Article

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