Patent ID: 8249797
Filing Date: 2012-08-21
Classification: G01S

Abstract:
1. A positioning system, comprising: a positioning module being in communication with at least one satellite, said positioning module receiving positioning information including ephemeris data; a switch module coupled to said positioning module and having a pair of outputs for switching said positioning information between said pair of outputs; a first transmission interface coupled to a first of said pair of outputs of said switch module; a second transmission interface coupled to a second of said pair of outputs of said switch module; and a central processor coupled to said first transmission interface for transmitting said positioning information received through said first transmission interface to a navigation application program responsive to said switch module coupling said positioning information to said first output, and said second transmission interface for transmitting said positioning information received from said second transmission interface to a control program responsive to said switch module coupling said positioning information to said second output; wherein when the navigation application program is inactive, the control program controls the positioning module to receive the positioning information including the ephemeris data timely from the satellite through the positioning module; wherein when the navigation application program is enabled, the control program is set into an inactive mode or an active mode, and the navigation application program receives the positioning information including the ephemeris data from the satellite through the positioning module, wherein said control program drives said positioning module into the inactive mode, if the intensity of a satellite signal received by said positioning module is lower than a predetermined value.