Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Trash receptacle
Methods and apparatus for ultrasonic cleaning
Oil extractor and the preparation method thereof
Area reduction for surface mount package chips
Image forming apparatus assembled with a fixing member and a pressing member
Method and apparatus for user selection of advertising combinations
Plants and seeds of corn variety CV294874
  Randomly Featured Patents
Process for increasing the molecular weight of polyamides and other condensation polymers
Method for casting a concrete product
Solid state fail-safe logic system
Shoe upper
Tape cassette drive including means for reducing tape transport start-up shock
Memory test method and apparatus
Process for producing liquid crystal device including rubbing with two rubbing rollers rotating in same directions at different speeds
On-demand skip perforating
Bendable dash pedestal
Expansion valve