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Detecting a signal quality decrease in a measurement system

  • US 8,618,947 B2
  • Filed: 03/29/2013
  • Issued: 12/31/2013
  • Est. Priority Date: 09/30/2008
  • Status: Active Grant
First Claim
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1. A method of determining signal quality information of a physiological signal, comprising:

  • obtaining the physiological signal;

    generating a scalogram based at least in part on a wavelet transform of the physiological signal;

    determining one or more first characteristics of a pulse band of the scalogram;

    determining one or more second characteristics of a mains hum band or a noise band of the scalogram; and

    determining signal quality information of the physiological signal based at least in part on the one or more first characteristics and the one or more second characteristics.

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