Aiding location determinations in satellite positioning system receivers
AssigneeMotorola, Inc.
InventorsGeorge J. Geier, William P. Declerck, Thomas M. King, James Edward Stephen
Life of this patent
Estimating the term…
Abstract
A method for locating a satellite positioning system receiver, for example, a satellite positioning system enabled wireless communications device in cellular network, including obtaining a coarse position and/or a time estimate (210), and computing a satellite positioning system based position and/or time solution (240) that is constrained by uncertainty information associated with the coarse position and/or a time estimate. The uncertainty constraints may also be used to identify erroneous measurements used to compute the position solution.
Claims18
A method for locating a satellite positioning system receiver, the method comprising:
- obtaining at least one satellite pseudo range measurement;
- determining a position solution for the satellite positioning system receiver using the at least one pseudo range measurement;
- constraining the position solution determination with an uncertainty constraint associated with uncertainty of information used to determine the position solution of the satellite positioning system receiver.
A method in mobile wireless communications device, the method comprising:
- computing position solution information for the mobile wireless communications device;
- constraining the position solution information computation with an uncertainty constraint based upon uncertainty information associated with information used to compute the position solution information.
A method for computing the location of a satellite positioning system receiver, the method comprising:
- determining an over-determined position solution using information including at least one of coarse position and coarse time information;
- evaluating the information used to compute the over-determined position solution using residual information from the over-determined position solution and using uncertainty information for the at least one of the coarse location estimate and coarse time estimate used to compute the over-determined position solution.
A method in a satellite positioning system receiver, the method comprising:
- determining a satellite positioning system time solution for the satellite positioning system receiver;
- constraining the satellite positioning system time solution determination with an uncertainty constraint associated with uncertainty of information used to determine the satellite positioning system time solution.
Dependencies are inferred from the claim text.