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| Number | Title | Issue Date |
| 7746272 | Ambiguity estimation of GNSS signals for three or more carriers Methods and apparatus are provided for factorized processing of a set of GNSS signal data derived from signals having at least three carriers. A geometry filter is applied to the set of GNSS signal data using a geometry carrier-phase combination to obtain an array o... | 06/29/2010 |
| 7728767 | Phase ambiguity resolution method for a satellite based positioning system The invention relates to a satellite-based positioning system in which a transmitter (2) emits electromagnetic radiation at least at N≧3 carrier frequencies (3, 4, 5). In order to resolve the phase ambiguity for said satellite-based positioning syste... | 06/01/2010 |
| 7589668 | GNSS signal processing with frequency-dependent bias modeling Three new methods are presented to improve floating solutions and ambiguity resolution for multiple global satellite navigation systems (GNSS), one of which may be an FDMA-based GNSS such as GLONASS: (1) modeling of the hardware-related differential clock error betw... | 09/15/2009 |
| 7538721 | GNSS signal processing with partial fixing of ambiguities Three new methods are presented to improve floating solutions and ambiguity resolution for multiple global satellite navigation systems (GNSS), one of which may be an FDMA-based GNSS such as GLONASS: (1) modeling of the hardware-related differential clock error betw... | 05/26/2009 |
| 7535414 | Navigational positioning without timing information Provided herein are systems and methods that enable a navigation receiver to determine receiver position using a low ppm (Parts Per Million) Real Time Clock (RTC) under weak satellite signal reception conditions without the need for timing information from navigatio... | 05/19/2009 |
| 7528770 | Method for positioning using GPS in a restrictive coverage environment A system consisting of a base GPS receiver with a clear view of the sky, one or more remote GPS receivers with restricted views of the sky and a processing center that batch processes range information provided by the GPS receivers determines the positions of the re... | 05/05/2009 |
| 7498980 | Carrier phase GPS positioning device and method A carrier phase GPS positioning device is disclosed, which acquires a carrier phase accumulation value of satellite signals at one time on the mobile station side, associates plural carrier phase accumulation values on the reference station side at plural times prio... | 03/03/2009 |
| 7477183 | Ionosphere delay measurement using carrier phase One or more atmospheric propagation effects are estimated by using a phase comparison between and upper sideband and a lower sideband of a modulated signal. In one embodiment, one or more propagation effects are estimated by using a phase comparison between an upper... | 01/13/2009 |
| 7468691 | Positioning device, positioning control method, and recording medium A positioning device includes a phase calculation section which performs a correlation process of a specific positioning base code replica and a positioning base code from a specific transmission source to calculate a present phase of the positioning base code, an e... | 12/23/2008 |
| 7433779 | Method of following the course of the flight plan of a cooperative aircraft This method relates to the system of ATM air traffic management with cooperative aircraft provided with a flight management computer FMS, that are linked by a data transmission system ATN to the control authority and that have presented a flight plan to the control ... | 10/07/2008 |
| 7432853 | Ambiguity estimation of GNSS signals for three or more carriers Methods and apparatus are provided for factorized processing of a set of GNSS signal data derived from signals having at least three carriers. A geometry filter is applied to the set of GNSS signal data using a geometry carrier-phase combination to obtain an array o... | 10/07/2008 |
| 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 |
| 7411545 | Carrier phase interger ambiguity resolution with multiple reference receivers A method to determine a relative position between antennae comprising generating phase carrier measurements for a carrier frequency and at least three antennae including a master antenna and other antennae, generating phase integer sets based on the phase carrier me... | 08/12/2008 |
| 7388539 | Carrier track loop for GNSS derived attitude A method and system for reducing Global Navigation Satellite System (GNSS) carrier tracking loop ambiguities comprising: receiving a plurality of GNSS satellite signals with a first antenna in operable communication with a first tracking device and a second antenna ... | 06/17/2008 |
| 7355549 | Apparatus and method for carrier phase-based relative positioning A carrier phase-based relative positioning apparatus includes a plurality of antennas fixedly mounted on a moving body for receiving positioning signals from satellites, an inertial measurement unit (IMU) for measuring accelerations and angular velocities of the mov... | 04/08/2008 |
| 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 |
| 7333053 | Signal path system and method for a ranging signal receiver Methods and receivers determine a range from radio frequency ranging signals at multiple frequencies. The number of dedicated RF sections and correlation processing power is reduced by multiplexing signals from a sub-set of frequencies onto a common path. The common... | 02/19/2008 |
| 7312747 | Multiple-GNSS and FDMA high precision carrier-phase based positioning Three new methods are presented to improve floating solutions and ambiguity resolution for multiple global satellite navigation systems (GNSS), one of which may be an FDMA-based GNSS such as GLONASS: (1) modeling of the hardware-related differential clock error betw... | 12/25/2007 |
| 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 |
| 7298325 | Technique for accurate estimate of large antenna inertial two dimensional orientation using relative GPS spatial phase A radar antenna has a reflector and maximum gain along its boresight. The reflector has a periphery, typically circular, rectangular or elliptical. A plurality of Global Positioning System (GPS) satellite signal receiving antennas are rigidly, mechanically attached ... | 11/20/2007 |
| 7299133 | Data acquisition unit, system and method for geophysical data A data acquisition system for gathering geophysical data, a corresponding method, and a data acquisition unit for use with the system and method are disclosed. The system (10) comprises a plurality of data acquisition units (14) for gathering geophysic... | 11/20/2007 |
| 7292185 | Attitude determination exploiting geometry constraints A method and system for determining at least one attitude angle of a rigid body. The method comprising: receiving a plurality of Global Navigation Satellite System (GNSS) satellite signals with a plurality of antennas; establishing at least one pair of antennas such... | 11/06/2007 |
| 7292183 | GPS reference system providing synthetic reference phases for controlling accuracy of high integrity positions A positioning system or synthetic phase processor or rover station for providing high integrity positions with graduated accuracies. The positioning system includes one or more real time kinematic (RTK) reference stations for receiving GPS signals at established ref... | 11/06/2007 |
| 7286083 | Method and apparatus for improving fault detection and exclusion systems A method for improving fault detection and exclusion of a GPS receiver is provided. The method determines pseudorange measurement residuals of tracked signals, divides the signals into two groups based on whether each signal has a higher or lower probability of bein... | 10/23/2007 |
| 7277893 | System and method of flexible data reduction for arbitrary applications The present invention is directed to the use of an evolutionary algorithm to locate optimal solution subspaces. The evolutionary algorithm uses a point-based coding of the subspace determination problem and searches selectively over the space of possible coded solut... | 10/02/2007 |
| 7271330 | Rendition style determination apparatus and computer program therefor There is provided a rendition style selector operable by a user to select a desired rendition style from among a plurality of rendition styles associated with a plurality of portions of tones. In response to selecting operation via the selector, a rendition style is... | 09/18/2007 |
| 7256730 | Method and system for real time navigation using satellite transmitted three-carrier radio signals and ionospheric corrections The invention concerns a real-time navigation method for locating a rover using three-carrier radio signals of three different frequencies to determine the position of a user, transmitted by satellites. The method comprises a first step for determining “extra-wide... | 08/14/2007 |
| 7245215 | Position-tracking device for position-tracking system A position-tracking system for tracking the position of an object is disclosed. According to various embodiments, the tracking system includes a tracking device that is connected to or otherwise affixed to the object to be tracked. The tracking device may include, a... | 07/17/2007 |
| 7227496 | GPS rover station having position dithering for controlling accuracy of secure positions A positioning system or synthetic phase processor or rover station for providing high integrity positions with graduated accuracies. The positioning system includes one or more real time kinematic (RTK) reference stations for receiving GPS signals at established ref... | 06/05/2007 |
| 7221314 | Estimation and resolution of carrier wave ambiguities in a position navigation system A method and apparatus for resolving floating point and integer ambiguities in a satellite position navigation system is disclosed. A rover station is periodically positioned at unknown locations and has a satellite receiver capable of receiving the navigation signa... | 05/22/2007 |
| 7212155 | GPS navigation using successive differences of carrier-phase measurements The present invention includes a process for navigating an object according to signals from satellites by propagating the position of the object forward in time using successive changes in the carrier-phase measurements. The process computes at a low rate matrices r... | 05/01/2007 |
| 7202813 | GPS reference system providing a synthetic offset vector for dithering a rover station position A positioning system or synthetic phase processor or rover station for providing high integrity positions with graduated accuracies. The positioning system includes one or more real time kinematic (RTK) reference stations for receiving GPS signals at established ref... | 04/10/2007 |
| 7151489 | Method and system for multi-function satellite positioning system receivers Multifunction satellite positioning receiver having a plurality of functions that are selectable in response to predetermined events or in response to user actions and enable more efficient use of the hardware and processing resources of a multifunction satellite po... | 12/19/2006 |
| 7148843 | Enhanced real time kinematics determination method and apparatus A method of and computer-readable medium containing instructions for high accuracy, reliable position determination. A high precision GPS-RTK system using the present novel techniques is initialized instantaneously or near instantaneously. To improve the computation... | 12/12/2006 |
| 7138944 | Multiple antenna multi-frequency measurement system A measurement system and an associated method for determining the positions of multiple antennas to centimeter level accuracy. The system involves minimal incremental hardware cost per additional antenna to be tracked. The primary frequency RF signals are processed ... | 11/21/2006 |
| 7119741 | Method for combined use of 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 RTK system and a regional, wide-area, or global differential carrier-phase positioning system (WADGPS) in which disadvantages associated with the RTK and the WADGPS navigation techniques when used... | 10/10/2006 |
| 7116268 | Position measuring apparatus A position measuring apparatus is disclosed. The apparatus has a receiver for receiving signals from multiple satellites and measuring the position of a mobile station based on the received signals. In addition, an angle determination unit determines angle range dep... | 10/03/2006 |
| 7110762 | System and method for using corrected signals from a global positioning system to perform precision survey In a differential global positioning system that includes one or more base stations and rover units, a system and method for including a radio modem transceiver in the rover units, and packaging several components, including the transceiver and a radio antenna in a ... | 09/19/2006 |
| 7102563 | Methods and apparatuses of estimating the position of a mobile user in a system of satellite differential navigation Disclosed are methods and apparatuses for estimating the floating ambiguities associated with the measurement of the carrier signals of a plurality of global positioning satellites, such that the floating ambiguities are preferably consist for a plurality of differe... | 09/05/2006 |
| 7079075 | GPS rover station for synthesizing synthetic reference phases for controlling accuracy of high integrity positions A positioning system or synthetic phase processor or rover station for providing high integrity positions with graduated accuracies. The positioning system includes one or more real time kinematic (RTK) reference stations for receiving GPS signals at established ref... | 07/18/2006 |
