Patent ID: 9274212
Filing Date: 2016-03-01
CPC Classification: G01S,H04W

Claim Text:
1. A mobile terminal, comprising: a GPS receiver; a frequency divider; a processor; a memory; a Global Positioning System (GPS) parameter calibration module, which is configured, with the processor, to calibrate GPS parameters according to at least one of the following items: data from a GPS signal feedback and collection module, state parameters of said mobile terminal, environmental parameters of said mobile terminal; said GPS signal feedback and collection module, which receives output of the GPS receiver, and is configured, with the processor, to collect GPS parameters before and after said GPS parameter calibration module performs the calibration, and feedback collected data to said GPS parameter calibration module; wherein said GPS parameter calibration module comprises a time delay calibration module, which is configured, with the processor, to calibrate time delay parameters of the GPS; wherein said time delay calibration module receives output of the frequency divider, and is configured, with the processor, to: calculate a difference between the time of capturing satellite vehicles (referred to as SV) for a preset number of times and the required network search time, and compare said difference with a target time difference, in the case that said difference is less than said target time difference, increase a time delay value, and in the case that said difference is greater than said target time difference, decrease the time delay value; alternatively, according to a time delay value pre-loaded by said mobile terminal, start up receiving and positioning, and after the positioning is completed, check a positioning accuracy and/or signal strength, and adjust said pre-loaded time delay value according to said positioning accuracy and/or said signal strength, and start up receiving and positioning again, check said positioning accuracy and/or said signal strength, until a difference between said positioning accuracy and/or said signal strength and a target value is within a predetermined range.