METHOD AND SYSTEM FOR MOBILE DEVICE BASED GNSS POSITION COMPUTATION WITHOUT EPHEMERIS DATA
First Claim
1. A method of processing signals, the method comprising:
- performing by one or more processors and/or circuits in a Global Navigation Satellite Systems (GNSS) enabled mobile device;
receiving GNSS assistance data comprising acquisition assistance data from an assistance GNSS (A-GNSS) server; and
position of said GNSS enabled mobile device, using a local code delaydetermining without utilizing ephemeris data, a relative GNSS position of said GNSS enabled mobile device, with respect to a known approximate position of said GNSS enabled mobile device, utilizing a local code delay measurement for at least one GNSS satellite and said received acquisition assistance data.
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Accused Products
Abstract
A GNSS enabled mobile device receives GNSS assistance data comprising acquisition assistance data, from an A-GNSS server and calculates a relative GNSS position using the receive acquisition assistance data and a local code delay measurement, without using ephemeris data. The received GNSS assistance data comprises an approximate position, acquisition assistance data, satellite almanac data, and/or satellite azimuth and elevation fields, but no ephemeris data. The A-GNSS server calculates corresponding acquisition assistance data at a current time instant and/or one or more future time instants for the approximate position. The satellite azimuth and elevation fields are calculated using local GNSS measurements together with the acquisition assistance data in the received GNSS assistance data are used to calculate the relative GNSS position, which is added to the approximate position to generate an actual GNSS position.
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Citations
20 Claims
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1. A method of processing signals, the method comprising:
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performing by one or more processors and/or circuits in a Global Navigation Satellite Systems (GNSS) enabled mobile device; receiving GNSS assistance data comprising acquisition assistance data from an assistance GNSS (A-GNSS) server; and position of said GNSS enabled mobile device, using a local code delay determining without utilizing ephemeris data, a relative GNSS position of said GNSS enabled mobile device, with respect to a known approximate position of said GNSS enabled mobile device, utilizing a local code delay measurement for at least one GNSS satellite and said received acquisition assistance data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for processing signals, the system comprising:
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one or more processors and/or circuits in a Global Navigation Satellite Systems (GNSS) enabled mobile device, wherein said one or more processors and/or circuits are operable to; receive GNSS assistance data comprising acquisition assistance data from an assistance GNSS (A-GNSS) server; and determining, without utilizing ephemeris data, a relative GNSS position of said GNSS enabled mobile device, with respect to a known approximate position of said GNSS enabled mobile device, utilizing a local code delay measurement for at least one GNSS satellite and said received acquisition assistance data. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification