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VEHICLE NAVIGATION SYSTEM WITH DEAD RECKONING

  • US 20130116921A1
  • Filed: 11/05/2012
  • Published: 05/09/2013
  • Est. Priority Date: 11/03/2011
  • Status: Active Grant
First Claim
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1. A vehicle navigation system comprising:

  • a GNSS position engine (GPE) that uses GNSS satellite measurements to compute a first position and velocity of a vehicle and a first quality metric associated with the position and velocity;

    a dead reckoning engine (DRE) that operates parallel with the GPE, and computes a second position and velocity and a second quality metric associated with the dead reckoning;

    wherein in the GPE is configured to;

    use the second position and velocity to detect a set of outliers in an incoming GNSS measurement;

    use the second position and velocity as an initial estimate of its position and velocity for a particular time instant, which is then refined by GNSS measurements received at that particular time instant; and

    replace the first position and velocity with the second position and velocity.

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