| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 342357300 | The supplementary measurement being an inertial measurement; e.g., tightly coupled inertial (IPC) | 30 |
| 20100265126 | Positioning System and Method Thereof - The invention provides a positioning system. In one embodiment, the positioning system comprises a Global Navigation Satellite System (GNSS) module, a dead reckoning module, a Geographic Information System (GIS) module, and an calculating module. The GNSS module generates a first positioning data according to satellite communication. The dead reckoning module estimates a second positioning data according to a sensor's measurement data, the first positioning data, and a feedback positioning data of a previous epoch. The GIS module fits the first positioning data to a map to generate a third positioning data taken as a final output of the positioning system. The calculating module integrates the third positioning data and the second positioning data according to predetermined weights to obtain the feedback positioning data of a current epoch, which is recursively fed back to the dead reckoning module for a next estimation. | 10-21-2010 |
| 20100283670 | GPS COMPOUND NAVIGATION DEVICE - To provide a GPS compound device having a configuration including a GPS receiver, that accurately determines abnormality in an output from the GPS receiver based on a difference between a GPS pseudorange measurement and a Doppler frequency measurement, when detecting the abnormality in the outputs from the GPS receiver, while avoiding continuation of the abnormality at the time of the abnormality determination resulting from estimation errors of the GPS pseudorange measurement and the Doppler frequency measurement. When the abnormality of the outputs from the GPS receiver are detected, an abnormal period is counted. When the count value is below a predetermined threshold, the outputs from the GPS receiver are treated as abnormal, and after it exceeded the threshold, the outputs from the GPS receiver are treated as normal. Thus, the abnormality of the outputs from the GPS receiver can be determined accurately. | 11-11-2010 |
| 20100309042 | METHOD AND SYSTEM FOR A DATA INTERFACE FOR AIDING A SATELLITE POSITIONING SYSTEM RECEIVER - The invention described herein relates to aiding a Satellite Positioning System (SPS) receiver of a platform with a data interface to the platform data. The platform, for example, could be a vehicle, ship, aircraft, or a pedestrian. The SPS receiver would be used to track the location of the platform. The data interface would facilitate access by the SPS receiver to the data of the platform, and the SPS receiver in turn could provide SPS data (such as position, speed, and heading) to the platform. A further aspect of the invention includes hardware or software used by the data interface and the SPS receiver to provide, format, time-stamp, synchronize, and match platform data or SPS receiver data. | 12-09-2010 |
| 20110050488 | POSITIONING SYSTEM AND METHOD - A positioning method whereby inertial positioning data is calculated based upon measurements of an Inertial Navigation System. Virtual satellite ranging data is then generated based upon the inertial positioning data. The virtual satellite ranging data is then combined with received satellite ranging data from one or more satellites forming part of a Global Navigation Satellite System (GNSS). A GNSS positioning solution is then calculated based upon the combined received satellite ranging data and the virtual satellite ranging data. | 03-03-2011 |
| 20110068973 | Assimilating GNSS Signals to Improve Accuracy, Robustness, and Resistance to Signal Interference - A method for upgrading GNSS equipment to improve position, velocity and time (PVT) accuracy, increase PVT robustness in weak-signal or jammed environments and protect against counterfeit GNSS signals (spoofing). A GNSS Assimilator couples to an RF input of existing GNSS equipment, e.g., a GPS receiver, and extracts navigation and timing information from available RF signals, including non-GNSS signals, or direct baseband aiding, e.g., from an inertial navigation system, frequency reference, or GNSS user. The Assimilator fuses the diverse navigation and timing information to embed a PVT solution in synthesized GNSS signals provided to a GNSS receiver RF input. The code and carrier phases of the synthesized GNSS signals are aligned with those of actual GNSS signals to appear the same at the target receiver input. The Assimilator protects against spoofing by continuously scanning incoming GNSS signals for signs of spoofing, and mitigating spoofing effects in the synthesized GNSS signals. | 03-24-2011 |
| 20110084874 | HYBRID SYSTEM AND DEVICE FOR CALCULATING A POSITION AND FOR MONITORING ITS INTEGRITY - Hybrid system ( | 04-14-2011 |
| 20110140956 | Systems and Methods for Determining Geographic Location of a Mobile Device - A method for determining geolocation of a mobile device, and a system for performing the method. The mobile device includes a location component, a local positioning component, and a reference positioning component. The method includes determining a local-positioning period based on an identified factor, and obtaining a location fix for the device from the reference positioning component. The method further includes commencing the period and measuring movement using the location component. The method also includes determining a present location of the device, using the location component, based on the location fix and the movement data and, during the period, repeating the measuring and determining steps. The method further includes, after the period expires, updating the location fix with a new location fix from the reference positioning component, resetting the local-positioning period; and repeating the steps for determining location during the reset period using the new location fix. | 06-16-2011 |
| 20110169689 | ULTRA-TIGHTLY COUPLED GPS AND INERTIAL NAVIGATION SYSTEM FOR AGILE PLATFORMS - An Ultra-Tightly Coupled GPS-inertial navigation system for use in a moving agile platform includes a range residual extractor that uses best curve fitting of a third order polynomial for estimating range residual. The curve-fitted residual is used to update an error Kalman filter. The error Kalman filter includes correction for navigation solution, and IMU and GPS parameters. The navigation solution together with GPS parameter corrections are used in a Tracking Predictor to generate high-sampling-rate carrier and code replicas. The curve-fitting error covariance indicates signal to noise ratio for the tracked GPS signal and may be used for early indication of interference or jamming. | 07-14-2011 |
| 20110175772 | POSITIONING DEVICE, POSITIONING METHOD AND STORAGE MEDIUM - When a positioning request is made, position measurement using a positioning satellite is executed, and when the position measurement is executed, positioning result data is obtained as position data responded to the positioning request. On the other hand, when the position measurement using the positioning satellite is not executed, position measurement result data based on the measurement of a moving direction and a moving amount is obtained as position data responded to the positioning request. | 07-21-2011 |
| 20110254729 | CROSS COUPLED POSITIONING ENGINE (PE) ARCHITECTURE FOR SENSOR INTEGRATION IN GLOBAL NAVIGATION SATELLITE SYSTEM (GNSS) - Embodiments of the disclosure provide a cross coupled position engine architecture for sensor integration in a Global Navigation Satellite System. In one embodiment, a data processing engine for processing inertial sensor data within a positioning system receiver is disclosed. The data processing engine includes a first input for receiving the sensor data, and a second input for receiving a positioning data. The data processing system also includes a memory and a processor. The processor of the data processing system is coupled to the memory and to the first and second input. The processor of the data processing system is configured to calculate a net acceleration profile data from the inertial sensor data and from the positioning data. The net acceleration profile data calculated by the processor of the data processing system is used for the Global Positioning System (GPS) receiver to subsequently calculate a position and a velocity data. | 10-20-2011 |
| 20120105278 | METHOD OF DETERMINING NAVIGATION PARAMETERS FOR A CARRIER AND HYBRIDIZATION DEVICE ASSOCIATED WITH KALMAN FILTER BANK - A process for determination of navigation parameters of a carrier by a hybridisation device comprising a bank ( | 05-03-2012 |
| 20120218142 | Reporting of Last Acquired Position During Gap of Satellite Reception for GNSS Systems - A GNSS receiver includes a radio frequency module and an antenna for acquiring and tracking signals from various satellites and demodulating them to an intermediate frequency or a baseband signal. The receiver also includes a processing unit for processing the demodulated signals to obtain a first position, velocity, and time (PVT fix) data and displays the data to a user. The receiver may include a memory unit for storing the obtained PVT fix. The receiver may further include one or more sensors for detecting a motion of the receiver and provide an index to the processing unit that determines a next position of the receiver based on the index during a coverage gap. The one or more sensors may include an accelerometer, a compass, or a combination thereof. | 08-30-2012 |
| 20120218143 | GNSS ULTRA-SHORT BASELINE HEADING DETERMINATION SYSTEM AND METHOD - A heading determination system comprises an inertial measurement unit (IMU) coupled with at least two GNSS receivers, each receiver paired with and receiving signals from a corresponding GNSS antenna, wherein the GNSS antennas are separated by an ultra-short baseline. The heading determination system receives signals broadcast by a plurality of GNSS satellites and calculates the phase difference in the signal seen among the separate GNSS antennas. Using this phase difference information, derived from comparing the signals received from a plurality of GNSS satellites, along with attitude data generated by the IMU, the heading determination system calculates a highly-accurate heading solution. A method is provided for determining a heading of a system including an IMU coupled with at least two GNSS receivers, with each receiver being paired with and receiving signals from a corresponding GNSS antenna and the antennas being separated by an ultra-short baseline. | 08-30-2012 |
| 20120242540 | HEADING DETERMINATION SYSTEM USING ROTATION WITH GNSS ANTENNAS - A heading determination system using signals from a global navigation satellite system (GNSS) includes a rotator mechanism for rotating an array of GNSS antennas. The antenna array rotational orientation relative to a structure, such as a vehicle, can be determined by an angular sensor. By rotating the antennas, multipath error can be nullified. Greater GNSS guidance accuracy and heading determination can be achieved by reducing or eliminating multipath error. The system is also adapted for providing output corresponding to the tilt and roll angles for a mobile structure on which it is mounted using two antennas, with the rotation angle being at least 90°. | 09-27-2012 |
| 20120326922 | GPS AND MEMS HYBRID LOCATION-DETECTION ARCHITECTURE - The present application describes a computer-implemented method and system for obtaining position information for a moving mobile device with increased accuracy and reduced power consumption. The subject of the present application combines information from a GPS location sensor with information from MEMS devices such as an acceleration detector and a gyroscope using statistical analysis techniques such as a Kalman filter to estimate the location of the device with greater accuracy while using numerical methods such as the Newton-Raphson Method to minimize power consumption. Minimizing power consumption is possible because GPS signals sampled at a lower rate can conserve power, while GPS sampled at a lower rate and working together with MEMS devices can achieve the same level of location prediction accuracy as a GPS alone sampled at a higher rate. | 12-27-2012 |
| 20130002477 | Methods and systems for detecting GPS spoofing attacks - A system and method for detecting global positioning system (GPS) spoofing attacks includes collecting GPS readings along with inertial navigational system (INS) readings as a ground truth, and sequentially testing the GPS readings and INS readings through the use of a sequential probability ratio testing (SPRT) process. | 01-03-2013 |
| 20130082871 | POSITIONING APPARATUS, POSITIONING METHOD AND STORAGE MEDIUM - A positioning apparatus, positioning method and storage medium are described. According to one implementation, a positioning apparatus includes a first positioning section, a second positioning section, a first calculating section, a control section and a specifying section. The first positioning section performs positioning of the positioning apparatus. The second positioning section performs positioning of displacement of the positioning apparatus. The first calculating section calculates a positioning accuracy of displacement. The control section controls measurement operation of the first and the second positioning sections based on the positioning accuracy calculated by the first calculating section. The specifying section specifies a present position of the positioning apparatus based on a measured result of the first and second positioning sections. | 04-04-2013 |
| 20130176168 | Controlled access satellite navigation receiver - A controlled access satellite navigation receiver has only incomplete knowledge of secret codes transmitted by satellites. This incomplete knowledge allows only intermittent position determination. Incomplete secret codes and the intermittent positions they provide are useful for authenticating navigation signals or controlling access to secret satellite services. | 07-11-2013 |
| 20130214967 | METHOD AND APPARATUS FOR LOCATION POSITIONING IN ELECTRONIC DEVICE - A positioning method and apparatus of an electronic device which comprises a Global Navigation Satellite System (GNSS) or Global Positioning System (GPS), and an Inertial Navigation System (INS), includes receiving a satellite signal through the GNSS. A location of the electronic device and a reliability of location information of the electronic device is determined based on the satellite signal provided by the GNSS using at least one of satellite information of the satellite signal and location information based on the determined location of the electronic device. An operational level of the INS is determined using the reliability of the location information of the electronic device; and compensating the location of the electronic device by operating the INS according to the determined operational level of the INS. | 08-22-2013 |
| 20130321201 | SYSTEMS AND METHODS FOR THE SELECTION OF ANTENNAS IN AIRCRAFT NAVIGATION SYSTEMS - Systems and methods for the selection of antennas in aircraft navigation systems are provided. In one embodiment, a navigation receiver system for an aircraft comprises: a first aircraft antenna that receives transmitter signals from fixed-location ground transmitters and a second aircraft antenna that receives transmitter signals from the fixed-location ground transmitters, wherein the first aircraft antenna has a first gain pattern that is different from a second gain pattern of the second aircraft antenna; a switch coupled to a first receiver and the first and second aircraft antenna; and a switch controller coupled to the switch. The switch controller operates the switch to electrically couple the first receiver to either the first or second aircraft antenna based on a determination of whether the first gain pattern or the second gain pattern provides higher gain in a direction of a first fixed-location ground transmitter of the fixed-location ground transmitters. | 12-05-2013 |
| 20130342391 | HYBRID DEVICE LOCATION DETERMINATION SYSTEM - Various different techniques are used to determine a location of a device, including 3-dimensional (3D) mapping techniques as well as one or more of Global Navigation Satellite System (GNSS) techniques, wireless signal detection techniques, and inertial sensor techniques. The locations determined by these various techniques are combined to determine the location of the device and/or user of the device. In addition to the location of the device, an orientation or direction of view of the device and/or user of the device can optionally be determined as well. | 12-26-2013 |
| 20130342392 | Location Calculating Method and Location Calculating Device - A location calculating method includes acquiring measurement information by receiving satellite signals from positioning satellites and storing the acquired measurement information in a storage unit in association with acquisition time, calculating movement information that includes a movement direction and a movement distance by using a detection result of a sensor unit that at least includes an acceleration sensor and storing the calculated movement information in the storage unit in association with calculation time, and calculating a location at desired time by using at least the measurement information of which the acquisition time satisfies a predetermined proximity time condition and the movement information of which the calculation time is between the acquisition time of the measurement information and the given desired time. | 12-26-2013 |
| 20140062765 | SYSTEMS AND METHODS FOR SOLUTION SEPARATION FOR GROUND-AUGMENTED MULTI-CONSTELLATION TERMINAL AREA NAVIGATION AND PRECISION APPROACH GUIDANCE - A navigation system includes first receiver receiving satellite signals, second receiver receiving differential correction data from ground receivers, and processing device coupled to receivers. Processing device determines correction data for satellite signals based on differential correction; determines position solution based on satellite signals and corresponding differential correction data; determines first position sub-solutions based on satellite signals from all but one satellite (different for each first position sub-solution) and corresponding differential correction data; calculates first separations as function of first differences between position solution and first position sub-solutions; determines second position sub-solutions for mobile object based on satellite signals and corresponding differential correction data from all but one block of ground receivers (different for each second position sub-solution); calculates second separations as function of second differences between position solution and second position sub-solutions; detects error in position solution when one of first separations or second separations exceed corresponding separation limit. | 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 |
| 20140104101 | POSITION CALCULATING METHOD AND POSITION CALCULATING DEVICE - A position calculating device of a moving object including a satellite positioning unit and an inertial positioning unit sets an influence level of measurement result 1 of the satellite positioning unit on measurement result 2 of the inertial positioning unit to a first level until a given condition is established after position calculation is started, and sets the influence level to a second level after the given condition is established. The position of the moving object is calculated by performing a coupling process of coupling measurement result 1 and measurement result 2 on the basis of the set influence level. | 04-17-2014 |
| 20140132442 | POSITIONING DEVICE CAPABLE OF DETECTING THREE-DIMENSIONAL MOVE TRACE AND THE DETECTING METHOD THEREOF - A positioning device capable of detecting three-dimensional move trace including a GPS module, an acceleration detecting module, and a computing unit is illustrated. The GPS module acquires global position information of the positioning device. The acceleration detecting module continuously detects three-dimensional acceleration based on movements of the positioning device, and calculates three-dimensional vectors of the positioning device accordingly. The computing unit is coupled with the GPS module and the acceleration detection module. The computing unit generates plane position information according to the global position information and a plurality of short three-dimensional traces according to the three-dimensional vectors. The computing unit further generates a plurality of short-distance traces according to the plane position information and the plurality of three-dimensional traces, and provides a three-dimensional moving trace via combining the plurality of short-distance traces. | 05-15-2014 |
| 20140152493 | QUASI TIGHTLY COUPLED GNSS-INS INTEGRATION PROCESS - A quasi tightly coupled (QTC) aided INS (AINS) process has an inertial navigator system with a loosely-coupled AINS Kalman filter that constructs INS-GNSS position measurements, a GNSS position engine that computes a position fix from observables and an externally provided a priori position and position VCV matrix. An INS position seeding process in which the externally provided a priori position to the GNSS position engine is an antenna position computed from the INS position and attitude solution. An observable subspace constraint (OSC) process computes an OCS matrix that suppress the components of the GNSS position error due to a poor geometry in the GNSS position solution in the IG position measurement constructed by the AINS Kalman filter and that multiplies the OSC matrix and the IG position measurement and measurement model matrix to suppress uncorrected component of the GNSS position error in the IG position measurement and measurement model. | 06-05-2014 |
| 20140375493 | LOCALLY MEASURED MOVEMENT SMOOTHING OF GNSS POSITION FIXES - A method of improving position determination of a device using locally measured movement. A first position fix of a Global Navigation Satellite System (GNSS) receiver system of a device is accessed. A second position fix of the GNSS receiver system is accessed at a time subsequent to the first position fix. Locally measured device movement information is obtained from at least one sensor, that is in a known physical relationship to the device, for a time period after the first position fix and no later than the second position fix, wherein the at least one sensor comprises an image capture device. The quality of measurement of the second position fix is improved by disciplining the second position fix based on the locally measured device movement information. | 12-25-2014 |
| 20160097861 | METHOD AND APPARATUS FOR LOCATION DETERMINATION - A method and apparatus, such as implemented by software code on a mobile device, to estimate a location and a traveling distance by leveraging lower-power inertial sensors embedded in the mobile device as a supplement to the device's GPS. To minimize the negative impact of sensor noises, the invention exploits intermittent strong GPS signals and uses linear regression to build a prediction model which is based on a trace estimated from inertial sensors and the one computed from the GPS. Additionally or alternatively, the invention can utilize landmarks (e.g., bridges, traffic lights, etc.) detected automatically and/or special driving patterns (e.g., turning, uphill, and downhill) from inertial sensory data to improve the localization accuracy when the GPS signal is weak. | 04-07-2016 |
| 20160109583 | METHOD OF DETERMINING LOCATION OF MACHINE - A method of determining a location of a machine is provided. The method includes determining a location of the machine based on the signals received from an IMU at each of a plurality of unit time. The method also includes determining a location of the machine corresponding to a first unit time based on signals received from the satellite positioning unit at a second unit time. The method includes determining an error associated with the location of the machine, by a processing unit, based on the location determined by the satellite positioning unit and the location determined based on the signals received from the IMU at a unit time successive to the first unit time. The method also includes adding the error to the location of the machine determined based on the signals received from the IMU at a successive unit time to the second unit time. | 04-21-2016 |
