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| Number | Title | Issue Date |
| 7916070 | Tight coupling of GPS and navigation estimates with reducer or eliminated inertial measurement unit data A system and method for generating a navigation solution in high interference and dynamic environments using Global Positioning System (GPS) and navigation such as dead reckoning is described. The system configuration is a multi-satellite tracking loop structure obt... | 03/29/2011 |
| 7839916 | Systems and methods for communication in a global positioning system (GPS) device An apparatus and methods for communicating between or among global positioning system (GPS) receivers enhanced with wideband transmitters, which can include ultra wideband (UWB) transmitters. In one embodiment, WB pulses are precorrected by a transmitter to align wi... | 11/23/2010 |
| 7797105 | System and method for GPS acquisition using advanced tight coupling A system and method for GPS acquisition in relatively high interference is described. Acquisition is aided by an Advanced Tightly Coupled (ATC) tracking filters that compute a satellite range residuals and range rate residuals for satellites being acquired. Multiple... | 09/14/2010 |
| 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 |
| 7471744 | Efficient space-time adaptive processing (STAP) filter for global positioning system (GPS) receivers A system for efficiently filtering interfering signals in a front end of a GPS receiver is disclosed. Such interfering signals can emanate from friendly, as well as unfriendly, sources. One embodiment includes a GPS receiver with a space-time adaptive processing (ST... | 12/30/2008 |
| 7415354 | System and method for GPS acquisition using advanced tight coupling A system and method for GPS acquisition in relatively high interference is described. Acquisition is aided by an Advanced Tightly Coupled (ATC) tracking filters that compute a satellite range residuals and range rate residuals for satellites being acquired. Multiple... | 08/19/2008 |
| 7375680 | 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... | 05/20/2008 |
| 7292663 | Efficient space-time adaptive processing (STAP) filter for global positioning system (GPS) receivers A system for efficiently filtering interfering signals in a front end of a GPS receiver is disclosed. Such interfering signals can emanate from friendly, as well as unfriendly, sources. One embodiment includes a GPS receiver with a space-time adaptive processing (ST... | 11/06/2007 |
| 7274504 | System and method for advanced tight coupling of GPS and inertial navigation sensors A system and method for generating a navigation solution in high interference and dynamic environments using Global Positioning System (GPS) and inertial measurement unit (IMU) data is described. The system includes an Advanced Tightly Coupled (ATC) tracking process... | 09/25/2007 |
| 7243542 | Closed loop analog gyro rate sensor The present invention provides an apparatus and method for measuring the angular rotation of a moving body. The apparatus comprises an upper sensor layer, a lower handle layer substantially parallel to the sensor layer, at least one dither frame formed of the upper ... | 07/17/2007 |
| 6952460 | Efficient space-time adaptive processing (STAP) filter for global positioning system (GPS) receivers A system for efficiently filtering interfering signals in a front end of a GPS receiver is disclosed. Such interfering signals can emanate from friendly, as well as unfriendly, sources. One embodiment includes a GPS receiver with a space-time adaptive processing (ST... | 10/04/2005 |