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AssigneeStanford Telecommunications, Inc.
InventorsLeonard Schuchman, Ronald Bruno, Robert Rennard, Charles Moses
Estimating the term…
A global positioning system (GPS) in which a plurality earth orbiting satellites transmit position information to mobile radio stations on earth, is provided with a separate source satellite position data broadcast digital channels and one or more dial-up service separate communication channels (selected from a data link supported by terrestrial cellular telephone and other radio packet data services) for assisting the mobile radio station to access position information from the satellites. A controller is coupled to the mobile radio station for connecting to the separate communication channel for extricating the satellite position data via separate communication channel. The controller includes a microprocessor for processing the satellite position data to enable the mobile radio station to rapidly locate and access position information from said earth orbiting satellite. A unique system for processing the data is disclosed.
In a global positioning system (GPS) in which a plurality earth orbiting GPS satellites transmit position information to mobile radio stations on earth including a Satellite Data Message block, the improvement comprising:
In a GPS system wherein a plurality of GPS satellites transmit their respective time and location data including a Satellite Data Message block having ephemeris and time modes over radio frequency signals which enable a mobile GPS receiver on the ground receive said radio frequency signal to determine its position, the improvement comprising:
In a GPS satellite positioning system in which a plurality of earth orbiting GPS satellites each transmit Satellite Data Messages, including ephemeris data and time models, said Satellite Data Messages being transmitted in a frequency uncertainty band, tile method of optimally and rapidly acquiring all in view satellites comprising:
In a method for determining the position of a user of a GPS receiver for receiving GPS satellite signals containing GPS broadcast data, bit sync signals and frame sync signals, the improvement comprising, providing an independent source of a prior knowledge of receiver position to resolve ambiguity in the time position of the GPS solution.
In a GPS satellite positioning system for use in obstructed environments where much of the time, the line of site to most satellites is blocked and occasionally is clear, as on roads and urban areas or in heavily forested regions, comprising, providing a GPS receiver having a calibratable local oscillator and capable of performing parallel search for acquisition of all in-view satellites, comprising:
Dependencies are inferred from the claim text.