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

Image Number 4 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
Relative pose estimation of non-overlapping cameras using the motion of subjects in the camera fields of view
Method for preparing an organic film at the surface of solid support under non-electrochemical conditions, solid support thus obtained and preparation kit
Using rule induction to identify emerging trends in unstructured text streams
Solid-state imaging device and method for manufacturing the same
Toilet bowl
Ultrathin fluid-absorbent cores
Touch screen panel
  Randomly Featured Patents
Buried bit line DRAM cell
Medical mirror-self treatment
Cordless power tool system
Dual point shoulder strap for a golf bag
Fastener system and method for binding papers
Plasma display device
Non-reversible fastener
Warm-up suit
Tooless coaxial connector
Image output control apparatus, image output control method, image output control program and printer