Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Methods and apparatus for a navigation system with reduced susceptibility to interference and jamming










Image Number 3 for United States Patent #7372400.

A navigation system provides a significant level of protection against all forms of interference or jamming to GPS in a cost-effective way. The system employs a network of ground reference stations and Low Earth Orbiting (LEO) satellites in conjunction with GPS. A common-view ranging geometry to a GPS satellite is established that links a reference station and a user. A second common-view geometry to a LEO satellite between the same reference station and user pair is also established. The ground stations synthesize real-time aiding signals by making carrier phase measurements of GPS the LEO satellite signals. This aiding information is transmitted via the LEO satellites to the user receiver at high power to penetrate ambient jamming. The user receiver locks onto the carrier phase of the LEO satellite, demodulates the aiding information, then applies the carrier phase measurements and the aiding information to enable extended coherent measurements of the GPS signals. The system thereby recovers the GPS signals that would otherwise be lost to the jamming.








 
 
  Recently Added Patents
Eyewear frames with magnetic lens attachments
Waveform encoding for wireless applications
Video display mounting system and method
Thermal barriers of elevator door roller and rail
Stress barrier structures for semiconductor chips
Tire having a structural element reinforced with a hybrid yarn
Data retention of ferroelectric films by controlling film composition and strain gradient for probe-based devices
  Randomly Featured Patents
Methods of forming an electrically conductive line
Suture cutting scissor apparatus
Optical information processing method and optical information processing apparatus
Trimming device for marine propulsion unit
Chair
Reduction of blurring in view angle tilting MRI
Cyclopropanecarboxylate pesticides
Pet leash and flashlight combination apparatus
Implantable cardiac stimulation system providing capture threshold stability assessment and method
Antenna with near-field radiation control