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.
Claims22
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 GPS ephemeris data satellite vector information in Cartesian form describing one of:
- GPS satellite position information and GPS satellite movement information;
- providing the GPS satellite vector information to the mobile unit;
- and
- determining the position of the mobile unit as a function of the GPS satellite vector information and the mobile unit pseudoranges.
A method of determining the position of a mobile unit having a GPS receiver comprising the steps of measuring pseudoranges at the mobile unit;
- providing GPs satellite vector information to the mobile unit;
- determining the position of the mobile unit relative to a nearby reference location using the pseudoranges and the GPS satellite vector information;
- and determining the absolute position of the mobile unit from both the reference location and the relative location 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.
Dependencies are inferred from the claim text.