Data-Fusion-Based Quality Enhancement for HR Measurements Collected by Wearable Sensors

Shenghao Xia, Shu Fen Wung, Chang Chun Chen, Jude Larbi Kwesi Coompson, Janet Roveda, Jian Liu

Research output: Contribution to journalArticlepeer-review


The advancements of Internet of Things (IoT) technologies have enabled the implementation of smart and wearable sensors, which can be employed to provide older adults with affordable and accessible continuous biophysiological status monitoring. The quality of such monitoring data, however, is unsatisfactory due to excessive noise induced by various disturbances, such as motion artifacts. Existing methods take advantage of summary statistics, such as mean or median values, for denoising, without taking into account the biophysiological patterns embedded in data. In this research, a functional data analysis modeling method was proposed to enhance the data quality by learning individual subjects’ diurnal heart rate (HR) patterns from historical data, which were further improved by fusing newly collected data. This proposed data-fusion approach was developed based on a Bayesian inference framework. Its effectiveness was demonstrated in an HR analysis from a prospective study involving older adults residing in assisted living or home settings. The results indicate that it is imperative to conduct personalized healthcare by estimating individualized HR patterns. Furthermore, the proposed calibration method provides a more accurate (smaller mean errors) and more precise (smaller error standard deviations) HR estimation than raw HR and conventional methods, such as the mean.

Original languageEnglish (US)
Article number2970
Issue number10
StatePublished - May 2024


  • Bayesian inference
  • data quality
  • functional data analysis
  • Gaussian process
  • heart rate patterns
  • personalized patterns
  • precision care
  • wearable sensors

ASJC Scopus subject areas

  • Analytical Chemistry
  • Information Systems
  • Atomic and Molecular Physics, and Optics
  • Biochemistry
  • Instrumentation
  • Electrical and Electronic Engineering


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