METHOD AND APPARATUS FOR ENHANCED AUTONOMOUS GPS
First Claim
1. A method of locating position of a remote receiver, comprising:
- obtaining long term satellite tracking data at said remote receiver;
detecting satellite positioning system (SPS) satellites;
determining pseudoranges from said remote receiver to said detected SPS satellites; and
computing position of said remote receiver using said pseudoranges and said long term satellite tracking data.
6 Assignments
0 Petitions
Accused Products
Abstract
Method and apparatus for locating position of a remote receiver is described. In one example, long term satellite tracking data is obtained at a remote receiver. Satellite positioning system (SPS) satellites are detected. Pseudoranges are determined from the remote receiver to the detected SPS satellites. Position of the remote receiver is computed using the pseudoranges and the long term satellite tracking data. SPS satellites may be detected using at least one of acquisition assistance data computed using a previously computed position and a blind search. Use of long term satellite tracking data obviates the need for the remote receiver to decode ephemeris from the satellites. In addition, position of the remote receiver is computed without obtaining an initial position estimate from a server or network.
-
Citations
21 Claims
-
1. A method of locating position of a remote receiver, comprising:
-
obtaining long term satellite tracking data at said remote receiver; detecting satellite positioning system (SPS) satellites; determining pseudoranges from said remote receiver to said detected SPS satellites; and computing position of said remote receiver using said pseudoranges and said long term satellite tracking data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method of locating position of a remote receiver, comprising:
-
obtaining long term satellite tracking data at said remote receiver; measuring sub-millisecond pseudoranges to a first plurality of SPS satellites; measuring pseudorange rates with respect to a second plurality SPS satellites; calculating a position estimate of said remote receiver using said pseudorange rates; resolving integer-millisecond portions of said sub-millisecond pseudoranges using said position estimate to produce full pseudoranges; and computing position of said remote receiver using said full pseudoranges and said long term satellite tracking data. - View Dependent Claims (12, 13)
-
-
14. Apparatus for locating position, comprising:
-
a memory for storing long term satellite tracking data; a satellite signal receiver for detecting satellite positioning system (SPS) satellites and determining pseudoranges to said detected SPS satellites; and a processor for computing position using said pseudoranges and said long term satellite tracking data. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
-
Specification