Ambiguity windowing in communications among global navigation system satellite receivers
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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Abstract
A method of communicating corrections for information related to satellite signals among global navigation satellite system (GNSS) receivers is described. The method includes at a first GNSS device determining a component of position of a satellite. The component is then divided by a first value to thereby obtain an integer value and a remainder value, and the only the remainder value is transmitted from the first GNSS device to the second GNSS device. Knowing the first value, the second GNSS device calculates the component of position.
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Citations
21 Claims
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1. A method of communicating satellite observable information from a global navigation satellite system (GNSS), the method comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of communicating satellite observable information from a global navigation satellite system (GNSS), the method comprising, at a rover receiver:
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receiving a first remainder value and data indicative of a window size from a reference receiver, wherein the first remainder value is obtained by the reference receiver by dividing a first value of a satellite observable for a satellite by the window size, the first value determined by the reference receiver; determining a second value of the satellite observable for the satellite; dividing the second value by the window size to obtain a quotient and a second remainder value; and multiplying the quotient by the window size and adding the first remainder value to obtain the first value determined by the reference receiver. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification