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Ambiguity windowing in communications among global navigation system satellite receivers

  • US 9,354,319 B2
  • Filed: 03/04/2013
  • Issued: 05/31/2016
  • Est. Priority Date: 02/20/2009
  • Status: Active Grant
First Claim
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1. A method of communicating satellite observable information from a global navigation satellite system (GNSS), the method comprising:

  • at a first GNSS device, determining a first value of a satellite observable for a satellite;

    at the first GNSS device, dividing the first value by a window size to obtain a first quotient and a first remainder value, wherein the window size is dynamically determined by the first GNSS device according to an estimated error of the first value; and

    transmitting the first remainder value and data indicative of the window size from the first GNSS device to a second GNSS device without transmitting the first quotient;

    at the second GNSS device, determining a second value of the satellite observable for the satellite;

    at the second GNSS device, dividing the second value by the window size to obtain a second quotient and a second remainder value; and

    at the second GNSS device, multiplying the second quotient by the window size and adding the first remainder value received from the first GNSS device to obtain the first value determined by the first GNSS device.

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