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Method for efficiently detecting impairments in a multi-constellation GNSS receiver

  • US 9,897,701 B2
  • Filed: 07/07/2014
  • Issued: 02/20/2018
  • Est. Priority Date: 10/08/2013
  • Status: Expired due to Fees
First Claim
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1. A method for a receiver of signals from one or more satellite navigational systems, comprising:

  • acquiring coarse position, time, and frequency values for each of a plurality of satellites from one or more satellite navigational systems, the plurality of satellites being those currently estimated to be in view of the receiver;

    determining whether one or more of the acquired coarse values are within a minimum range; and

    if it is determined that the one or more acquired coarse values are within the minimum range;

    determining a pseudo-true peak of a position domain correlogram comprising Line of Sight (LOS) vectors of each of the plurality of satellites; and

    identifying any satellite whose cross-correlation peak is beyond a maximum distance from the pseudo-true peak as an impaired satellite.

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