Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Transmitter identifier database for enhanced GPS performance










Image Number 6 for United States Patent #8131464.

A mobile station database of cellular identifications and associated position information is stored in mobile station memory. The mobile station uses the position information in the database to assist in determining a current position for the mobile based on an identifier, such as cell ID, base station BSIC, PSC, or carrier frequency. A satellite vehicle signal is searched in an uncertainty region that is a function of position information associated with the current identifier. The uncertainty region can be limited by assumed platform dynamics via predefined velocity and acceleration information. Time maintenance for the mobile station can also be achieved through known approximate position from the position database and measurement of a single satellite vehicle propagation delay. The mobile station can compare a position determination obtained through satellite vehicle signals with position database information to determine the validity of that position. Out-of-network position information is also stored in the position database and is optionally shared with a network.








 
 
  Recently Added Patents
White polyester film and surface light source therewith
Process for making diethyl ether from acetic acid
Plants and seeds of hybrid corn variety CH817100
Semiconductor device
Hemostatic devices and methods of making same
LED package chip classification system
Flexible circuit routing
  Randomly Featured Patents
Cutting tool assembly for a rotatable chip forming head
Information processing apparatus, information processing method, program, and recording medium
Rotary sheet-printing press having a register bar
Container
Proximal humeral fracture reduction and fixation device
Generic pump for a soap dispenser
Magnetic tunnel junctions with high tunneling magnetoresistance using non-bcc magnetic materials
Determination of hepatitis C virus genotype
Method for manufacturing nonreciprocal circuit device
Data writing method, memory controller, and memory storage apparatus