Method of determining the position of a mobile unit
AssigneeKoninklijke Philips Electronics N.V.
InventorsSaul R. Dooley, Andrew T. Yule, Christopher B. Marshall
Life of this patent
Estimating the term…
Abstract
A method of determining the position of a mobile unit (MS1) having a GPS receiver (24) is disclosed. The method comprising the steps of measuring mobile unit pseudoranges at the mobile unit (MS1) using the GPS receiver (24); providing reference pseudoranges corresponding to a reference location situated remote from the mobile unit (BS1); and determining the position of the mobile unit (MS1) relative to the reference location (BS1) as a function of both the reference pseudoranges and the mobile unit pseudoranges.
Claims37
A method of determining the position of a mobile unit having a GPS receiver comprising the steps of measuring mobile unit pseudoranges at the mobile unit using the GPS receiver;
- providing reference pseudoranges corresponding to a reference location situated remote from the mobile unit;
- and determining the position of the mobile unit relative to the reference location as a function of both the reference pseudoranges and the mobile unit pseudoranges.
A method according to any of the preceding claims further comprising the step of providing GPS satellite position information relative to the reference location wherein the position of the mobile unit relative to the reference location is determined as a function of the GPS satellite position information.
A method according to any of the preceding claims wherein the reference pseudoranges are provided by measuring pseudoranges using a GPS receiver located at the reference location.
A method according to any of the preceding claims wherein the mobile unit pseudoranges are transmitted from the mobile unit to a communications base station, and wherein the position of the mobile unit relative to the reference location is determined remote from the mobile unit.
A method of determining the position of a mobile unit having a GPS receiver comprising the steps of measuring pseudoranges at the mobile unit;
- determining the position of the mobile unit relative to a nearby reference location using the pseudoranges;
- and determining the absolute position of the mobile unit from both the reference location and the relative position of the mobile unit to the reference location.
A method of determining the position of a mobile unit having a GPS receiver comprising the steps of measuring mobile unit pseudoranges at the mobile unit using the GPS receiver;
- receiving GPS ephemeris data in the form of Keplerian parameters at a reference location located remote from the mobile unit;
- calculating from the ephemeris data satellite vector information in Cartesian form describing either or both of the position or movement of GPS satellites;
- providing the satellite vector information to the mobile unit;
- and determining the position of the mobile unit as a function of the satellite vector information and the mobile unit pseudoranges.
A mobile unit comprising a communications receiver for receiving reference pseudoranges corresponding to a reference location situated remote from the mobile unit;
- a GPS receiver for measuring mobile unit pseudoranges;
- and a GPS processor for determining the position of the mobile unit relative to the reference location as a function of both the reference pseudoranges and the mobile unit pseudoranges.
A mobile unit comprising a GPS receiver for measuring pseudoranges at the mobile unit;
- and a GPS processor for determining the position of the mobile unit relative to a nearby reference location using the pseudoranges, and determining the absolute position of the mobile unit from both the reference location and the relative position of the mobile unit to the reference location.
A mobile unit comprising a communications receiver for receiving satellite vector information in Cartesian form describing either or both of the position or movement of GPS satellites;
- a GPS receiver for measuring mobile unit pseudoranges from GPS satellite signals modulated by GPS ephemeris data in the form of Keplerian parameters;
- and a GPS processor for determining the position of the mobile unit as a function of both the satellite vector information and the mobile unit pseudoranges.
Positioning apparatus comprising a GPS receiver for measuring GPS pseudoranges;
- and a transmitter for transmitting the pseudoranges to another GPS receiver located remote from the positioning apparatus.
Positioning apparatus comprising a GPS receiver for receiving GPS ephemeris data in the form of Keplerian parameters;
- a processor for calculating from the ephemeris data satellite vector information in Cartesian form describing either or both of the position or movement of GPS satellites;
- and a transmitter for transmitting the satellite vector information to another GPS receiver located remote from the positioning apparatus.
Dependencies are inferred from the claim text.