Claims
- 1. An enhancement system for a Satellite Positioning System (SATPS), comprising:at least one pseudolite deployed in a geographical region of interest; a database comprising a geographical position related to each of the deployed pseudolites; means for communicating at least a portion of the database comprising the geographical position of the deployed pseudolites to a SATPS receiver for use in determining a position of the SATPS receiver.
- 2. The enhancement system of claim 1, wherein the deployed pseudolite are deployed in a geographical region that has a limited SATPS constellation visibility.
- 3. The enhancement system of claim 2, wherein the database is indexed.
- 4. The enhancement system of claim 3, wherein the database is indexed by cellular telephone system cell site.
- 5. The enhancement system of claim 4, wherein the SATPS system is a Global Positioning System (GPS).
- 6. The enhancement system of claim 5, wherein the means for communicating is a cellular telephone system.
- 7. The enhancement system of claim 6, further comprising means for transmitting the geographical position of the deployed pseudolites to the cellular telephone system.
- 8. The enhancement system of claim 7, further comprising transmitting prepositioning information for a code search from the cellular telephone system to the SATPS receiver.
- 9. The enhancement system of claim 5, wherein the means for communicating is a one-way broadcast mechanism.
- 10. The enhancement system of claim 9, wherein the one-way broadcast mechanism is an FM broadcast station.
- 11. An interface to a Satellite Positioning System (SATPS) receiver, comprising means for inputting local pseudolite information, wherein the local pseudolite information is selectively used by the SATPS receiver for determining geoposition of the SATPS receiver, and wherein the interface is separate from a SATPS antenna input used for receiving SATPS signals.
- 12. The interface of claim 11, wherein the local pseudolite information comprises a pseudolite PRN number and a geographical location of the pseudolite.
CROSS-REFERENCE TO RELATED APPLICATIONS
This application claims priority under 35 U.S.C. §119(e) of U.S. Provisional Patent Application No. 60/234,856, filed Sep. 22, 2000, entitled “NETWORK ASSISTED PSEUDOLITE ACQUISITION FOR ENHANCED GPS NAVIGATION,” by Keith J. Brodie et al., which application is incorporated by reference herein.
US Referenced Citations (7)
Provisional Applications (1)
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Number |
Date |
Country |
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60/234856 |
Sep 2000 |
US |