Patent application number | Description | Published |
20090295634 | Global positioning system receiver - A GPS receiver includes a demodulator for obtaining ephemeris data and almanac data from a navigation message sent by satellites, and includes a calculator. The calculator is used for calculating almanac correction parameters according to coordinate differences between ephemeris-based coordinates of the satellites and almanac-based coordinates of the satellites. The GPS receiver also includes a satellite position calculator for calculating the ephemeris-based coordinates of the satellites according to the ephemeris data, for calculating the almanac-based coordinates of the satellites according to the almanac data, and for calculating positions of the satellites according to the ephemeris data, the almanac data and the almanac correction parameters. | 12-03-2009 |
20100328150 | NAVIGATION SYSTEM WITH ERROR-DETECTION ON DOPPLER FREQUENCIES OF SATELLITE SIGNALS - A navigation system for detecting error on Doppler frequencies of a plurality of satellite signals measured by the navigation system is disclosed herein. The navigation system includes an offset calculator for calculating offsets of the Doppler frequencies of the satellite signals during a predetermined time period and calculating an average value of the offsets. The navigation system further includes an error detecting unit coupled to the offset calculator. The error detecting unit compares the offsets of the Doppler frequencies of the satellite signals with the average value of the offsets and determines whether the satellite signals are unavailable according to corresponding comparison results. | 12-30-2010 |
20130082873 | Moving Information Determination Apparatus, a Receiver, and a Method Thereby - A moving information determination apparatus includes an ECA (Earth Center Assistant) information acquisition module, an altitude information and position information storage module and a moving information calculation module. The altitude information and position information storage module provides initial position information of the moving information determination apparatus and altitude information of the moving information determination apparatus. The ECA acquisition module obtains a radius of the Earth at the current position of the moving information determination apparatus. The moving information calculation module calculates the current position and/or velocity of the moving information determination apparatus based on the radius of the Earth and a plurality of signals from a plurality of satellites. | 04-04-2013 |
20130085666 | Method, Apparatus and System with Error Correction for an Inertial Navigation System - A method for correcting errors for an Inertial Navigation System. The method includes the steps of determining a working state of the Inertial Navigation System based on a current positioning parameter of the moving object, a navigation map-based reference positioning parameter and a GPS-based reference positioning parameter, and replacing an initial parameter of the Inertial Navigation System with the GPS-based reference positioning parameter and resetting the Inertial Navigation System to an initial state if the Inertial Navigation System is determined to be in an abnormal working state. | 04-04-2013 |
20130257651 | NAVIGATION BIT BOUNDARY DETERMINATION APPARATUS AND A METHOD THEREFOR - A navigation bit boundary determination apparatus and a method therefor. In one example, the navigation bit boundary determination apparatus includes a satellite signal receiving module, a position receiving and clock calibration module, a detection module, a first calculation module, a second calculation module, and a determination module. The satellite signal receiving module is configured to receive a satellite signal from a satellite and record a local receiving time of the satellite signal. The position receiving and clock calibration module is configured to receive a time signal and a position of the navigation bit boundary determination apparatus. The detection module is configured to detect if ephemeris information of the satellite is available. The first calculation module is configured to calculate a coordinate of the satellite. The second calculation module is configured to calculate a transmitting time for the satellite signal. The determination module is configured to determine a navigation bit boundary of the satellite signal. | 10-03-2013 |
20130265194 | Navigation Bit Boundary Determination Apparatus and a Method Therefor - A navigation bit boundary determination apparatus and a method therefor. The navigation bit boundary determination apparatus includes a Beidou satellite signal receiving module, a position receiving and clock calibration module, a calculation module, and a determination module. The Beidou satellite signal receiving module receives a Beidou Geostationary Earth Orbit (GEO) satellite signal, determines and records a local receiving time of the Beidou GEO satellite signal. The position receiving and clock calibration module receives a GPS time signal and a position of the navigation bit boundary determination apparatus. The calculation module calculates a transmitting time for the Beidou GEO satellite signal. The determination module determines a navigation bit boundary of the Beidou GEO satellite signal. | 10-10-2013 |
20140062767 | Method and Apparatus for Synchronizing Navigation Data - Method, apparatus, and programs for synchronizing navigation data. A distance between a navigation device and a receiver is estimated. The receiver receives navigation data from the navigation device. A sending time of the navigation data sent from the navigation device is then determined based on the estimated distance between the navigation device and receiver. Synchronization information is computed based on the sending time of the navigation data. The synchronization information is used for synchronizing the navigation data. | 03-06-2014 |
20140062768 | Method and Apparatus for Synchronizing Navigation Data - Method, apparatus, and programs for synchronizing navigation data. A first distance between a first navigation device and a receiver and a second distance between a second navigation device and the receiver are estimated. The receiver receives first and second navigation data from the first and second navigation devices, respectively. Based on a first sending time of the first navigation data sent from the first navigation device and the first and second distances, a second sending time of the second navigation data sent from the second navigation device is then determined. Synchronization information of the second navigation device is computed based on the second sending time of the second navigation data. The synchronization information is used for synchronizing the second navigation data received at the receiver. | 03-06-2014 |
20140062780 | Method and Apparatus for Synchronizing Navigation Data - Method, apparatus, and programs for synchronizing navigation data. First synchronization information is obtained from a receiver. The first synchronization information was used for synchronizing first navigation data received by the receiver from a navigation device. A sending time of second navigation data sent from the navigation device is then determined based on the first synchronization information. Second synchronization information is computed based on the sending time of the navigation data. The second synchronization information is used for synchronizing the second navigation data. | 03-06-2014 |
20140070986 | APPARATUSES AND METHODS FOR TRACKING A NAVIGATION RECEIVER - A satellite positioning component calculates a first position associated with a navigation receiver at a first time. An inertial positioning component calculates a second position associated with the navigation receiver at the first time. A combination positioning component provides a reference position, combines the first position and the second position into a third position based on distances among the first position, the second position, and the reference position, and locates the navigation receiver according to the third position. | 03-13-2014 |
20140180580 | MODULE, DEVICE AND METHOD FOR POSITIONING - A positioning module is disclosed. Positioning module includes a satellite selection module and a filter. The satellite selection module is configured for selecting one or more positioning satellites among a plurality of satellites of one or more satellite navigation systems and outputting satellite information of the one or more positioning satellites. Filter coupled to the satellite selection module is configured for receiving the satellite information of the one or more positioning satellites, and calculating a position information of positioning module. | 06-26-2014 |
20140203962 | Method and System for Navigation - Method and system for navigation are disclosed. One or more signals are received. One or more navigation systems are determined. The one or more signals are directed to navigation and sent from the one or more navigation systems. Navigation information associated with the determined one or more navigation systems is obtained based on the one or more signals. | 07-24-2014 |
20140347216 | EPHEMERIS COLLECTION DEVICE AND METHOD - The present disclosure discloses an ephemeris collection device and a method of collecting ephemeris data. The ephemeris collection device may include a data storage unit, configured to store a first part of a first ephemeris subframe if a synchronization of the first ephemeris subframe is not completed; and a subframe merge unit, coupled with the data storage unit and configured to receive a second part of the first ephemeris subframe from the subframe synchronizer and retrieve the first part of the first ephemeris subframe from the data storage unit during a subsequent transmission of the first ephemeris subframe. A complete first ephemeris subframe is obtained based on the first part and the second part of the first ephemeris subframe. | 11-27-2014 |
20140347219 | RECEIVERS AND METHODS FOR MULTI-MODE NAVIGATION - A receiver for a multi-mode navigation system includes a base band unit and a calculation unit. The base band unit is configured for allocating resources to positioning satellites in each of one or more navigation system, and tracking the positioning satellites with the allocated resources to obtain satellite information of each of the positioning satellites. The satellite information includes one or more of pseudo-ranges, position coordinates, velocity information, and frequency information of the positioning satellites. The calculation unit is configured for receiving the satellite information from the base band unit, evaluating the positioning satellites in each navigation system, and determining a positioning parameter of the receiver. Determination of the positioning parameter includes calculating a position and a velocity of the receiver based on the satellite information according to a least square algorithm. | 11-27-2014 |
20140350885 | METHOD AND APPARATUS FOR EVALUATING SATELLITE POSITIONING QUALITY - A method for evaluating satellite positioning quality and a satellite receiver are disclosed. Satellite information is obtained from one or more satellites of the set of satellites. The satellite information includes an observed value of a parameter of each of the one or more satellites. An estimated value of each observed value is determined based on the satellite information. A set of residual values between the estimated values and the observed values is obtained. A positioning quality associated with the set of satellites is determined based on the set of residual values. | 11-27-2014 |
20140372496 | METHOD FOR PERFORMING AND VALIDATING NAVIGATION BIT SYNCHRONIZATION - A method for determining bit boundary of a navigation bit of a satellite signal received by a receiver is disclosed. The method includes dividing an assumed navigation bit equally into a plurality of power units, calculating unit powers of each of the plurality of power units, and determining a plurality of phases. Each of the plurality of phases is associated with an estimated bit boundary. The method further includes adding unit powers of the plurality of power units to obtain a plurality of bit powers. Each of the plurality of bit powers corresponds to the estimated bit boundary associated with one of the plurality of phases. The bit boundary of the navigation bit is determined based on the plurality of bit powers. | 12-18-2014 |
20150022395 | METHOD AND RECEIVER FOR DETERMINING SYSTEM TIME OF A NAVIGATION SYSTEM - Receiver and methods for determining system time of a navigation system is disclosed. In one example, the receiver includes a baseband processing module and a calculation module. The baseband processing module is configured for obtaining satellite information from the navigation system. The calculation module is configured for estimating a pseudorange based on the satellite information; smoothing the pseudorange via a code; calculating clock bias and clock drift based on the smoothed pseudorange; and determining system time of the navigation system based on the calculated clock bias and clock drift. | 01-22-2015 |
20150057928 | Method and Apparatus for Controlling An Electrical Device and a Wireless Charging Device - Method and apparatus for controlling an electrical device and a wireless charging device, each comprising one or more modules. An interrupt signal is received. A type of the interrupt signal is determined. A first module is activated based on the type of the interrupt signal to perform one or more functions. The electrical device and the wireless charging device share at least the first module. | 02-26-2015 |