Prediction of pulsatile physiological signals using a negative group delay circuit

  • Authors:

  • Hilmi R. Dajani;Jonathan C. H. Lam

  • Affiliations:

  • School of Information Technology and Engineering, University of Ottawa, Ottawa, Canada;School of Information Technology and Engineering, University of Ottawa, Ottawa, Canada

  • Venue:
  • BEBI'08 Proceedings of the 1st WSEAS international conference on Biomedical electronics and biomedical informatics
  • Year:
  • 2008

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Abstract

Prediction of pulsatile physiological signals is demonstrated using a negative group delay electronic circuit. The peak of the pulse leaves the output port of the circuit before it enters the input port. Analog and digital circuit simulations with simulated neural pulses show that prediction of the entire waveform is possible 50 µsec in advance (relative to a pulse-width of around 1 msec). With a blood pressure pulse, prediction is possible 20 msec in advance (relative to a pulse-width of around 1 sec). In all cases, there is minimal distortion in the morphology of the predicted pulse. Prediction of pulsatile physiological activity could be used to compensate for processing and mechanical delays that compromise real-time performance and stability in assistive biomedical devices.