×

System and method for removing narrowband noise

  • US 7,551,965 B2
  • Filed: 03/08/2006
  • Issued: 06/23/2009
  • Est. Priority Date: 01/04/2001
  • Status: Active Grant
First Claim
Patent Images

1. A system for receiving data from an implantable medical device, comprising:

  • an antenna for receiving a signal transmitted from the implantable device;

    circuitry for computing a spectrum of the received signal;

    circuitry for detecting a noise spectrum of the received signal by subtracting a template spectrum from the spectrum of the received signal, the template spectrum representing a noise-free signal;

    circuitry for scaling the template spectrum such that the signal power of the noise spectrum is minimized;

    circuitry for identifying frequency peaks in the noise spectrum in accordance with spectral thresholds derived from the signal power of the noise spectrum;

    one or more notch filters for removing noise from the received signal, the notch filters having notch frequencies corresponding to frequency peaks of the detected noise spectrum;

    a filter generator for updating filter coefficients of the notch filters so that the notch frequencies correspond to the detected noise spectrum.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×