Method and apparatus for locating mobile receivers using a wide area reference network for propagating ephemeris
First Claim
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1. A method for assisting a satellite positioning system mobile device comprising:
- receiving satellite ephemeris data from all satellites in a global positioning system constellation of satellites;
communicating satellite ephemeris data to a central processing site;
selecting ephemeris data for a subset of all the satellites; and
providing the selected ephemeris data to said mobile device.
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Abstract
A method and apparatus for distribution and delivery of global positioning system (GPS) satellite telemetry data using a communication link between a central site and a mobile GPS receiver. The central site is coupled to a network of reference satellite receivers that send telemetry data from all satellites to the central site. The mobile GPS receiver uses the delivered telemetry data to aid its acquisition of the GPS satellite signal. The availability of the satellite telemetry data enhances the mobile receiver'"'"'s signal reception sensitivity.
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Citations
64 Claims
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1. A method for assisting a satellite positioning system mobile device comprising:
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receiving satellite ephemeris data from all satellites in a global positioning system constellation of satellites;
communicating satellite ephemeris data to a central processing site;
selecting ephemeris data for a subset of all the satellites; and
providing the selected ephemeris data to said mobile device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. Apparatus for assisting a satellite positioning system mobile receiver comprising:
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a network of satellite signal receivers receiving satellite ephemeris from all satellites in a global positioning system constellation of satellites and communicating satellite ephemeris data to a central processing site; and
said central processing site selecting ephemeris data from a subset of all the satellites and providing the selected ephemeris data to a mobile receiver. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64)
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Specification