×

Detecting Lack of Movement to Aid GNSS Receivers

  • US 20100073227A1
  • Filed: 09/24/2009
  • Published: 03/25/2010
  • Est. Priority Date: 09/24/2008
  • Status: Active Grant
First Claim
Patent Images

1. A method for estimating the clock drift, said method comprising:

  • receiving a signal from a satellite;

    estimating a Doppler frequency of said satellite;

    receiving an assistance Doppler frequency from an aiding source that is given under the assumption that said user is stationary;

    comparing said estimated Doppler frequency to said assistance Doppler frequency when said user is stationary; and

    using the difference in the two Doppler frequencies to estimate clock drift.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×