A Novel AMARS Technique for Baseline Wander Removal Applied to Photoplethysmogram

Ammar A.K. Timimi, M. A.Mohd Ali, Kalaivani Chell

Research output: Contribution to journalArticle

Abstract

A new digital filter, AMARS (aligning minima of alternating random signal) has been derived using trigonometry to regulate signal pulsations inline. The pulses are randomly presented in continuous signals comprising frequency band lower than the signal's mean rate. Frequency selective filters are conventionally employed to reject frequencies undesired by specific applications. However, these conventional filters only reduce the effects of the rejected range producing a signal superimposed by some baseline wander (BW). In this work, filters of different ranges and techniques were independently configured to preprocess a photoplethysmogram, an optical biosignal of blood volume dynamics, producing wave shapes with several BWs. The AMARS application effectively removed the encountered BWs to assemble similarly aligned trends. The removal implementation was found repeatable in both ear and finger photoplethysmograms, emphasizing the importance of BW removal in biosignal processing in retaining its structural, functional and physiological properties. We also believe that AMARS may be relevant to other biological and continuous signals modulated by similar types of baseline volatility.

Original languageEnglish
Article number7920424
Pages (from-to)627-639
Number of pages13
JournalIEEE Transactions on Biomedical Circuits and Systems
Volume11
Issue number3
DOIs
Publication statusPublished - 1 Jun 2017

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Digital filters
Frequency bands
Blood
Processing

Keywords

  • Baseline wander removal (BWR)
  • biomedical transducer
  • cubic spline interpolation
  • digital volume pulse (DVP)
  • frequency selective filters
  • linear interpolation
  • photoplethysmography (PPG)
  • PPG signal processing
  • slope trigonometry
  • synthetic BW
  • synthetic PPG

ASJC Scopus subject areas

  • Biomedical Engineering
  • Electrical and Electronic Engineering

Cite this

A Novel AMARS Technique for Baseline Wander Removal Applied to Photoplethysmogram. / Timimi, Ammar A.K.; Ali, M. A.Mohd; Chell, Kalaivani.

In: IEEE Transactions on Biomedical Circuits and Systems, Vol. 11, No. 3, 7920424, 01.06.2017, p. 627-639.

Research output: Contribution to journalArticle

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