| Patent application number | Description | Published |
|---|
| 20080238765 | Satellite Clock Prediction - Devices and methods are described for determining position information without broadcast ephemeris data for a spanned time period using predictions of future satellite states. These predictions include predictions of satellite clock bias. During the spanned time period, broadcast ephemeris is received such that a broadcast-ephemeris-derived satellite clock bias may be determined. The predictions of satellite clock bias subsequent to the receipt of the broadcast ephemeris may then be corrected based upon the broadcast-ephemeris-derived satellite clock bias. | 10-02-2008 |
| 20090115660 | DETERMINING POSITION WITHOUT USE OF BROADCAST EPHEMERIS INFORMATION - Devices and methods are described for determining position information without broadcast ephemeris data for extended time periods. A server or client device receives or collects historical state data of satellites of a satellite-based positioning system and generates predictions of future satellite trajectories for future time periods. When a server generates the predictions, the predictions are subsequently transferred to a client device. The client device selects predictions appropriate to time of interest. The time can be any time during a period of at least seven calendar days. The client device reconstructs satellite states using information on the predictions and uses the reconstructed satellite states to acquire satellite signals as appropriate to the current location and time of the client device. The client device determines and/or tracks its position using information of the satellite states and timing information of the satellite signals. | 05-07-2009 |
| 20100182195 | Resolving Transmit Time Uncertainty in Carrier Phase Relative Positioning - Methods and apparatus are provided for use in electronic devices to perform carrier phase relative positioning processing. | 07-22-2010 |
| 20100204916 | GNSS POSITIONING USING PRESSURE SENSORS - Systems, methods and devices for improving the accuracy of GNSS data are provided. Specifically, embodiments of the invention can advantageously use sensor input to improve the accuracy of position fixes. The use of physical sensors in navigation systems is deemed particularly advantageous, especially where altitude data derived from the pressure sensor is calibrated with and/or blended with GNSS altitude data. | 08-12-2010 |
| 20110059752 | Concurrent Wireless Transmitter Mapping And Mobile Station Positioning - The subject matter disclosed herein relates to concurrently estimating locations for one or more mobile stations and one or more wireless transmitters. | 03-10-2011 |
| 20110063167 | USING MAGNETOMETER WITH A POSITIONING SYSTEM - A mobile station determines an approximate latitude using a measured feature of the Earth's magnetic field. An approximate longitude may also be determined. The mobile station uses the approximate latitude and longitude, if determined, to assist in determining a position fix for the mobile station, e.g., by determining a list of visible satellites in a satellite positioning system (SPS) during search and acquisition of satellite signals and/or using the approximate position as a seed position in the position computation. The feature of the Earth's magnetic field may be, e.g., inclination or vertical intensity, and may be determined using data from a three-dimensional magnetometer and a three-dimensional accelerometer. An instantaneous value of the magnetic field feature may be averaged to reduce the affects of motion and the presences of large metallic masses. | 03-17-2011 |
| 20110178708 | USING OBJECT TO ALIGN AND CALIBRATE INERTIAL NAVIGATION SYSTEM - The initialization of an inertial navigation system is performed using information obtained from an image of an object. Positional and orientational information about the object in a global reference frame and positional and orientational information about the camera relative to the object are obtained from the image. Positional and orientational information for the camera in the global reference frame is determined along with a transformation matrix between inertial sensor reference frame and a navigation coordinate frame. The inertial navigation system is initialized using the positional and orientational information for the camera, the transformation matrix and the velocity of the camera when the object was imaged, i.e., zero. Using the initialized data with measurements from the inertial sensors the position of the mobile platform may be updated during navigation and provided, e.g., on a digital map. Inertial navigation errors may be corrected using information obtained from images of different objects. | 07-21-2011 |
| 20120021758 | SENSING RELATIVE POSITION FROM A WIRELESS TRANSCEIVER - Disclosed is an apparatus, system and method for determining a location of a mobile device based on a location of a wireless network node, a distance between the wireless network node and the mobile device, and a bearing from the wireless network node to the mobile device, wherein the bearing is determined based on a directional signal and magnetometer measurements. | 01-26-2012 |
| 20120021762 | METHODS AND APPARATUSES FOR USE IN PROVIDING POSITION ASSISTANCE DATA TO MOBILE STATIONS - Methods and apparatuses are provided which may be implemented in various devices to provide position assistance data and/or the like to a mobile station with regard to at least one of a plurality of different indoor regions. | 01-26-2012 |
