| Patent application number | Description | Published |
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| 20080200187 | SYSTEM AND METHOD FOR ESTIMATING CELL CENTER POSITION FOR CELL ID BASED POSITIONING - Systems and methods for estimating a cell center location in a wireless communication system having all interface to a satellite positioning system (“SPS”) such as for example, a Geosynchronous Positioning System (“GPS”). The wireless communication system provides service to mobile stations within a cell, each mobile station includes a SPS receiver. Examples of the systems and methods for estimating a cell center location analyze the mobile station locations in a cell as a uniform distribution of mobile station locations and calculate a statistical measure characterizing the mobile station locations as a function of the mobile station locations. In one example, the statistical measure is a maximum likelihood mobile station location. In another example, the statistical measure is the mean mobile station location in the cell. The estimated cell center location may be used to approximate the location of the mobile station during a warm or cold restart of the SPS receiver part of the mobile station. | 08-21-2008 |
| 20080246653 | GPS NAVIGATION USING INTERACTING MULTIPLE MODEL (IMM) ESTIMATOR AND PROBABILISTIC DATA ASSOCIATION FILTER (PDAF) - A method for GPS navigation which uses an interacting multiple-model (IMM) estimator with a probabilistic data association filter (PDAF) improves navigation performance. The method includes (a) providing two or more models of GPS navigation, with each model characterized by a model state vector which is updated periodically, (b) providing for each model a corresponding filter for deriving, for each period, a current value for the corresponding model state vector based on current measurements made on parameters affecting the corresponding state vector; and (c) applying an interacting multiple model (IMM) estimator to provide, for each period, a current value for a system state vector using the current values of the model state vectors for that period and their corresponding filters. Each model state vector may include one or more of the following: variables: 3-dimensional position, 3-dimensional velocity, satellite clock bias, satellite clock drifts and one or more other satellite parameters. The current value of the system state vector may be a weighted average of the current values of the model state vectors, where the weights are a set of mode probabilities. In addition, one or more of the filters is a probabilitic data association filter (PDAF). | 10-09-2008 |
| 20080303663 | METHOD FOR VERIFYING THE INTEGRITY OF A CONTAINER - A container security device comprises a sensor and a local memory configured to store input from the sensor, wherein the device is configured to detect a breach of a container. A container security method comprises the steps of detecting a change in a measurement value inside a container, and indicating a breach if a change in measurement value exceeds a threshold. A method of determining if a container was breached comprises the steps of downloading a log of gathered information, and checking the gathered information for any abnormalities, wherein the gathered information includes at least one sensor measurement taken from the inside of a container. A device for maintaining security of a navigation receiver unit comprises an enclosure, comprising a sensor, a processor, a local memory configured to store input from the sensor, and a navigation receiver unit, wherein the device is configured to detect a breach of the enclosure. | 12-11-2008 |
| 20090096669 | MULTIPATH MITIGATION USING SENSORS - Systems, methods and devices for multipath mitigation are presented. Specifically, embodiments of the invention can advantageously use sensor input to mitigate the effect of multipath signals received at a receiver. The use of physical sensors in navigation systems is deemed particularly advantageous. | 04-16-2009 |
| 20090115656 | Systems and Methods for Global Differential Positioning - Systems and methods for global differential positioning are provided. In this regard, a representative system, among others, may include a first receiver being configured to receive global correction data from a single source; and a computing device being configured to adjust positional estimates based on the received global correction data. A representative method, among others, for global differential positioning may include receiving satellite measurement information; receiving global correction data from a single source; generating location information based on the received satellite information; adjusting the location information based on the global correction data to produce adjusted location information; and delivering the adjusted location information. | 05-07-2009 |
| 20090143983 | NAVIGATION SYSTEM WITH DYNAMICALLY CALIBRATED PRESSURE SENSOR - A navigation system includes a pressure sensor, a calibration module in communication with the pressure sensor, and an altitude module in communication with the calibration module. The calibration module is configured to determine a dynamic pressure proportionality coefficient based at least in part on a static pressure proportionality coefficient, a measured pressure value from the pressure sensor, and a velocity value. The altitude module is configured to calculate a sensor-based altitude value based at least in part on the determined dynamic pressure proportionality coefficient. | 06-04-2009 |
| 20090219206 | EPHEMERIS EXTENSION METHOD FOR GNSS APPLICATIONS - Systems, methods and devices for improving the performance of Global Navigation Satellite System (GNSS) receivers are disclosed. In particular, the improvement of the ability to calculate a satellite position or a receiver position where a receiver has degraded ability to receive broadcast ephemeris data directly from a GNSS satellite is disclosed. Correction terms can be applied to an approximate long-term satellite position model such as the broadcast almanac. | 09-03-2009 |
| 20110169947 | IMAGE IDENTIFICATION USING TRAJECTORY-BASED LOCATION DETERMINATION - The subject matter disclosed herein relates to acquiring information regarding a target object using an imaging device of a handheld mobile device. | 07-14-2011 |
| 20110183606 | SYNCHRONIZING A RADIO NETWORK WITH END USER RADIO TERMINALS - A wireless communications device comprises a communication receiver and a positioning system receiver in the wireless mobile communication device. An absolute time signal is received at the positioning system. A network time signal is received at the communication receiver of the wireless mobile communication device. A controller is in signal communication with the position system receiver and the communication receiver. The controller is configured to determine an offset of the absolute time signal from the network time signal and generates a timing mark. The timing mark is tagged by the positioning system receiver with an internal clock value wherein the timing mark has a known relationship with the absolute time signal. A memory stores the offset of the absolute time signal from the network time signal. A transmitter in the wireless mobile communication device transmits the offset for receipt by another wireless mobile communication device. | 07-28-2011 |
| Patent application number | Description | Published |
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| 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 |
| 20120029811 | PND REPOSITIONING DETECTOR FOR BETTER NAVIGATION ACCURACY IN A CAR - An apparatus and method for a personal navigation apparatus comprising a personal navigation device (PND) for providing navigational guidance information. The PND may include a single-dimensional magnetic detector for sensing magnetic flux amplitudes of a magnetic field generated by a magnet. Alternatively, the PND may include a three-dimensional magnetic detector and a magnetic calibration module for determining an ambient magnetic field calibration value representing immediate surroundings of the PND. | 02-02-2012 |
