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Method and system for detecting interference for global positioning systems

  • US RE41,382 E1
  • Filed: 05/20/2009
  • Issued: 06/22/2010
  • Est. Priority Date: 06/18/2003
  • Status: Active Grant
First Claim
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1. A method for detecting interference in a Global Positioning System, the method comprising the steps of:

  • receiving at least one satellite signal from one or more satellites in a Global Positioning System;

    measuring a noise floor value in a frequency band of the at least one satellite signal;

    identifying an interference signal based on the noise floor value wherein the interference signal is determined by a comparison between the noise floor value from the at least one satellite signal and a predetermined acceptable range;

    determining an interference value for the interference signal from the noise floor value wherein a level of the noise floor value corresponds to a level of interference;

    wherein the comparison between the noise floor value and the predetermined acceptable range determines a corresponding interference value for the interference signal;

    wherein if the noise floor value is within the predetermined acceptable range, the interference value is set at a predetermined low interference value;

    wherein if the noise floor value is outside the predetermined acceptable range, the noise floor interference value is set at a predetermined high interference value; and

    providing the interference value to at least one user for informing the user of the interference signal.

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