Signal processing apparatus and method

  • US 6,699,194 B1
  • Filed: 04/11/2000
  • Issued: 03/02/2004
  • Est. Priority Date: 04/14/1997
  • Status: Expired due to Term
First Claim
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1. A physiological monitor for monitoring a pulserate of a living being, said monitor comprising a signal processor configured to:

  • transform a time-domain plethysmograph dataset into a spectral-domain dataset;

    identify three or more spectral peaks at non-zero frequencies in said spectral domain dataset; and

    sort said three or more spectral peaks according to one or more rules into one or more spectral peaks corresponding to a fundamental frequency and one or more harmonics of said fundamental frequency, and estimate a pulserate from said fundamental frequency and said one or more harmonics.

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