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| Number | Title | Issue Date |
| 7755541 | System and method for tracking vehicles and containers A location system for tracking assets within a terminal includes a Differential Global Positioning System (DGPS) reference receiver within the terminal that receives GPS signals and generates DGPS correction data. In one aspect, a roving receiver unit is carried by ... | 07/13/2010 |
| 7746271 | Method for determining the global position The invention relates to a method of increasing accuracy of a global position of a user receiver determined by a navigation system. The global position is corrected based on a position error determined by a mobile reference receiver and transmitted to the user recei... | 06/29/2010 |
| 7701387 | Supporting an assisted satellite based positioning For supporting a satellite based positioning of a mobile arrangement (30,40) with assistance data, a communication network converts parameters of a dedicated orbit model describing a movement of a satellite (50,60), which dedicated orbit model is defin... | 04/20/2010 |
| 7696922 | Method and apparatus for geolocation determination The disclosure relates to method and apparatus for geolocation determination. In one embodiment, the disclosure relates to a method for detecting an erroneous satellite measurement by a receiver, including the steps of (a) determining an approximate location of the ... | 04/13/2010 |
| 7679554 | Communications link time transfer to improve navigation system accuracy A method and apparatus for improving differential navigation accuracy uses time transfer over a two-way communications link. The communications link transmits an overall time offset between a differential reference station and a remote user. A differential navigatio... | 03/16/2010 |
| 7679555 | Navigation receiver and method for combined use of a standard RTK system and a global carrier-phase differential positioning system A mobile satellite navigation receiver for calculating an offset between a local positioning system and a wide-area satellite positioning system is presented. The mobile satellite navigation receiver determines a first solution of a position of the mobile satellite ... | 03/16/2010 |
| 7671791 | GPS receiver for use with differential-GPS signals The present disclosure provides a system for converting differential-GPS signals to a format suitable for input to a conventional GPS receiver and combining the converted signal with GPS ranging signals. The combined signals are provided to a conventional GPS receiv... | 03/02/2010 |
| 7656349 | Enhancement of GNSS position determination in poor signal propagation environments A system, for enhancing location estimates by movable rovers that use receivers for processing ranging signals from orbiting satellites, including a fixed base station that serves as a ranging signal source for the rovers' receivers. The base station may also determ... | 02/02/2010 |
| 7576690 | Position determination with reference data outage Position determination at a rover station on the basis of positioning signals from a plurality of positioning satellites. During normal operation a position of the rover station is determined on the basis of the positioning signal from the positioning satellites and... | 08/18/2009 |
| 7570204 | Generalized divergence-free carrier smoothing and dual frequency differential GPS architecture implementing the same A method of generating differentially-corrected smoothed pseudorange data in a differential global positioning system (DGPS) includes generating, at a base station, non-mode specific pseudorange and carrier phase correction data. The non-mode specific pseudorange an... | 08/04/2009 |
| 7515100 | Method and system for initiating real-time kinematic network operations Embodiments of the present invention recite methods and systems for expediting the initiating of Real-Time Kinematic (RTK) network operations. In one embodiment, an RTK base station is disposed at a known location. A broadcast position of the RTK base station is the... | 04/07/2009 |
| 7511661 | Method for combined use of a local positioning system, a local RTK system, and a regional, wide-area, or global carrier-phase positioning system The present invention includes a method for a combined use of a local positioning system, a local RTK system and a regional, wide-area, or global differential carrier-phase positioning system (WADGPS) in which disadvantages associated with the local positioning syst... | 03/31/2009 |
| 7498979 | Fast decimeter-level GNSS positioning Methods and apparatus for processing of data from GNSS receivers are presented. A post-processing engine and a post-processed accuracy predictor are described. The post-processing engine provides high accuracy GNSS (GPS) position determination with short occupation ... | 03/03/2009 |
| 7471239 | Methods for processing external correction messages, correcting position measurements of GNSS receiver, and related apparatuses Methods and apparatuses for processing external correction messages in a GNSS receiver are provided. One of the proposed methods includes providing a first storage unit; receiving a plurality of external correction messages from different data sources, wherein a plu... | 12/30/2008 |
| 7439908 | Method and apparatus for determining smoothed code coordinates of a mobile rover Disclosed is a method for determining coordinates of a mobile rover. The method includes determining a vector of one-shot code coordinates of the mobile rover. The method also includes determining a vector of phase increments by determining full phase differences fo... | 10/21/2008 |
| 7436355 | Method and apparatus for geolocation determination The disclosure relates to method and apparatus for geolocation determination. In one embodiment, the disclosure relates to a method for detecting an erroneous satellite measurement by a receiver, including the steps of (a) determining an approximate location of the ... | 10/14/2008 |
| 7427950 | Method for increasing the reliability of position information when transitioning from a regional, wide-area, or global carrier-phase differential navigation (WADGPS) to a local real-time kinematic (RTK) navigation system The present invention includes a method for a combined use of a local positioning system, a local RTK system and a regional, wide-area, or global differential carrier-phase positioning system (WADGPS) in which disadvantages associated with the local positioning syst... | 09/23/2008 |
| 7420878 | System and method for precision acoustic event detection A system and method for providing precision locations for sensors which make up an array of sensors in a gunshot detection system. In a preferred embodiment sensors employ a commercial GPS which reports a sensor position or a group of pseudoranges to GPS satellites.... | 09/02/2008 |
| 7405694 | Communication link time transfer to improve navigation system accuracy A method and apparatus for improving differential navigation accuracy uses time transfer over a two-way communications link. The communications link transmits an overall time offset between a differential reference station and a remote user. A differential navigatio... | 07/29/2008 |
| 7400294 | Portable reference station for local differential GPS corrections A method and system for local computation of information to improve accuracy in a differential Global Navigation Satellite Systems (GNSS). The method comprising: determining a current location of a reference receiver; comparing the current location with at least one... | 07/15/2008 |
| 7391363 | System and method for augmentation of satellite positioning systems A system and a method for augmentation of satellite positioning systems wherein a monitoring ground station (MGS) is connected to a computer center in charge of determining the level of error of a satellite (NS) broadcasting positioning signals, and transmitting nav... | 06/24/2008 |
| 7386395 | Systems and methods for shock compensation utilizing an adaptive control technique algorithm A method for providing dynamic disturbance compensation to an inertial system is described. The method includes determining estimated correction factors based on received acceleration components, and dynamically determining filter coefficients for a filter configure... | 06/10/2008 |
| 7373223 | Global navigation satellite system landing systems and methods A method and system are provided for performing satellite-supported landings in CAT II/III type landing conditions. An exemplary system includes a communication component, a positioning system, a radar altimeter, and a processor. The communication component receives... | 05/13/2008 |
| 7369830 | Monolithic GPS RF front end integrated circuit A highly integrated GPS RF Front End which uses a single conversion stage employs an image rejection mixer stage to eliminate the need for an image reject RF bandpass filter. Also a relatively high sample rate A/D is employed which allows a timeless monolitic IF Fil... | 05/06/2008 |
| 7365512 | System for directing moving object A moving-object directing system for directing a moving object to a target location includes: a moving-object directing unit and a moving object. The moving-object directing unit includes: a directing signal transmitter for generating a first moving-object directing... | 04/29/2008 |
| 7365678 | Determining usability of a navigation augmentation system In one aspect, the invention is the system for assessing a navigation augmentation environment. The system includes a reference station for receiving messages from a satellite. The reference station has a known position. The system also includes a simulator for simu... | 04/29/2008 |
| 7365679 | Positioning apparatus, control method of positioning apparatus, control program for positioning apparatus, and computer-readable recording medium having control program for positioning apparatus recorded therein A positioning apparatus that measures a current position by using measurement basis codes carried on satellite waves from a plurality of positioning satellites includes: a first phase error information generating unit that generates first phase error information ind... | 04/29/2008 |
| 7358857 | Global positioning systems applications A global positioning system includes a fixed base unit of known position and at least one mobile unit, the base unit and the mobile unit each including a GPS receiver. This system further includes means for comparing the simultaneous GPS identified positions of the ... | 04/15/2008 |
| 7358897 | Apparatus, methods and computer program products for GPS signal acquisition using an adaptive search engine A GPS receiver includes a digital signal processor (DSP) configured to receive a carrier-modulated signal and to provide an adaptive GPS search engine operative to search the carrier-modulated signal for GPS signals over a variable number of carrier timing hypothese... | 04/15/2008 |
| 7359716 | Location based service (LBS) system, method and apparatus for authorization of mobile station LBS applications A system, method and apparatus for providing location services whereby location determination and location disclosure are treated as separate and independent processes. Location determination may be performed (as necessary) via a first set of network entities to obt... | 04/15/2008 |
| 7349684 | Communication system for tracking assets A communication system comprises a mobile unit that generates mobile unit position signals and message signals. A base station is wireless two-way coupled to the mobile unit. The base station has a GPS receiver that generates base station position signals, a master ... | 03/25/2008 |
| 7345627 | Land-based local ranging signal methods and systems To provide sub-meter accuracy in a local positioning system, ranging signals with a high modulation rate of code, such as 30 MHz, or more are transmitted. Code phase measurements may be used to obtain the accuracy without requiring relative motion or real time kinem... | 03/18/2008 |
| 7342538 | Asynchronous local position determination system and method In a local positioning system, the land-based transmitters include free running oscillators or oscillators free of clock synchronization with any remote oscillator. A reference receiver receives the ranging signals from different transmitters and generates timing of... | 03/11/2008 |
| 7340343 | RTK positioning system and positioning method therefor The locations of pseudolites and the location of a stationary reference station are previously known by a user processing unit, and codes and carrier phase of signals transmitted from the pseudolites are measured by the stationary reference station, a moving referen... | 03/04/2008 |
| 7321776 | Estimating GPS time at cellular terminals based on timing of information from base stations and satellites A mobile terminal generates an estimate of GPS time. The mobile terminal includes a cellular receiver, a GPS receiver, and a processor. The cellular receiver is configured to receive communication signals from cells in a wireless communication system. The GPS receiv... | 01/22/2008 |
| 7319876 | System and method for using equipment identity information in providing location services to a wireless communication device A system, apparatus, and method provides location services to a mobile station by employing equipment identity information. In one aspect of the present inventive concept, a location server uses the equipment identity information of a mobile station in order to sele... | 01/15/2008 |
| 7317418 | Global positioning apparatus and method for using a temperature compensated oscillator to perform a position fix A global positioning receiver unit utilizes a temperature compensated oscillator and a unit controller. The temperature compensated oscillator generates a clock signal, and the unit controller is configured to track GPS time based on the clock signal while the recei... | 01/08/2008 |
| 7310062 | Dual antenna diversity method to detect GPS signal tampering A method of detecting GPS signal tampering uses two GPS receivers. A first receiver measures carrier phases of two or more satellite signals and of a tampered signal. A second receiver measures carrier phases of the two or more satellite signals and the tampered sig... | 12/18/2007 |
| 7308276 | Method for locating mobile units based on received signal strength ratio Location of mobile units in a wireless local area network is based on use of signal strength ratios and other criteria. In one embodiment absolute value of signal strength is used to derive a second value of location. The second value may be used as the location if ... | 12/11/2007 |
| 7301498 | Inserting measurements in a simplified geometric model to determine position of a device The invention relates to a method and a system for determining the position of a device (1) by taking measurements to determine the range between at least a first positioning station (2) and the device (1) and to determine the range between at l... | 11/27/2007 |
