Resources Contact Us Home
Method of mixed data assisted and non data assisted navigation signal acquisition, tracking and reacquisition

Image Number 2 for United States Patent #7859456.

The present invention provides systems and methods for enabling a navigation signal receiver to perform both data assisted and non-data assisted integration to provide better integration during signal acquisition, reacquisition and tracking. In data assisted integration mode, a receiver uses known or predicted data bits to remove the modulated data bits of a received signal prior to integration. In non data assisted integration mode, when the data bits are not known or predictable, the receiver uses an optimal estimation or maximum likelihood algorithm to determine the polarities of the modulated data bits of the received signal. This may be done by determining which of various possible bit pattern yields the maximum integrated power. When the modulated data bits are not known or predictable over a limited range, the receiver carries out data assisted integration over the known or predictable data bits and additional non data assisted integration.

  Recently Added Patents
System and method for computational unification of heterogeneous implicit and explicit processing elements
Weak acid recovery system for ethanol separation processes
Locking flange
Cantilevered probe detector with piezoelectric element
Methods for fabricating semiconductor devices
Lettuce sister lines PX06514083, PX06514153, PX06514201 and PX06514204
System and method for displaying a constant time selection context menu interface
  Randomly Featured Patents
Fibrillar copolyester having a large aspect ratio, production method for the same, and a resinous composite material containing the same as reinforcement
Water treating method and water treating system
Steering wheel provided with horn switch
Optoelectronic ignition device for an internal combustion engine
Electrical tester
Spatial light modulator including drive lines
Combined pen and timer
Electrolytic reduction of naphthalene to isotetralin
Process for fabricating a precursor sheet, particularly as book cover stock and product produced thereby