Method and Apparatus for Processing of Satellite Signals Without Time of Day Information
AssigneeGlobal Locate, Inc.
InventorsFrank van DIGGELEN, Charles ABRAHAM
Life of this patent
Estimating the term…
Abstract
Method and apparatus for locating position of a satellite signal receiver is described. In one example, pseudoranges are obtained that estimate the range of a satellite signal receiver to a plurality of satellites. An absolute time and a position are computed using the pseudoranges at a first time. The absolute time is then used to compute another position at a subsequent time. In another example, a plurality of states associated with a satellite signal receiver are estimated, where the plurality of states includes a time tag error state. A dynamic model is then formed relating the plurality of states, the dynamic model operative to compute position of the satellite signal receiver.
Claims15
A method of locating position of a satellite signal receiver, comprising:
- obtaining pseudoranges that estimate the range of the satellite signal receiver to a plurality of satellites;
- computing an absolute time and a position using the pseudoranges at a first time;
- using the absolute time to compute another position at a subsequent time.
A system for computing position of a satellite signal receiver, comprising:
- a mobile device comprising a satellite signal receiver and a wireless transceiver;
- a server being in wireless communication with the mobile device, where the satellite signal receiver provides pseudoranges that estimate the range of the satellite signal receiver to a plurality of satellites, and the wireless transceiver transmits the pseudoranges to the server, and where the server computes an absolute time and a position of the satellite signal receiver using the pseudoranges at a first time, and uses the absolute time to compute another position of the satellite signal receiver at a subsequent time.
A system, comprising:
- a mobile device comprising a satellite signal receiver and a wireless transceiver;
- a server being in wireless communication with the mobile device, where the satellite signal receiver provides pseudoranges that estimate the range of the satellite signal receiver to a plurality of satellites, and the wireless transceiver transmits the pseudoranges to the server, and where the server includes a sequential estimator having a plurality of states associated with a satellite signal receiver, the plurality of states including a time tag error state.
A mobile device, comprising:
- a satellite signal receiver for providing pseudoranges that estimate the range of the mobile device to a plurality of satellites;
- and
- a sequential estimator having a plurality of states associated with the satellite signal receiver, the plurality of states including a time tag error state.
A method for calculating an absolute position of a GPS receiver and an absolute time of reception of satellite signals comprising:
- providing pseudoranges that estimate the range of the GPS receiver to a plurality of GPS satellites,
- wherein each pseudorange is composed of a measured submillisecond component and a calculated integer millisecond component, and wherein each pseudorange has a consistent common mode error;
- providing an estimate of an absolute time of reception of a plurality of satellite signals;
- providing an estimate of a position of the GPS receiver;
- providing satellite ephemeris data;
- computing absolute position and absolute time using said pseudoranges by updating said estimate of an absolute time and the estimate of position of the GPS receiver.
Dependencies are inferred from the claim text.