GPS receiver and GPS position measurement method
US6480145B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 1, 2001 |
| Grant date | Nov 12, 2002 |
| Priority date | — |
| Expiry date | Mar 1, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/34
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A GPS receiver is disclosed wherein GPS position measurement can be performed stably and rapidly without the necessity to wait for periodical time information from a GPS satellite and power consumption is minimized also with a minimized position measurement time through the selection of an optimum time interval between intermittent receptions of GPS signals. The GPS receiver includes a GPS block for performing position measurement based on a signal transmitted from a GPS satellite to update a navigation message and repeating standby and startup thereof, an external clock block for holding frequency information and time information of a high accuracy and outputting a start signal to the GPS block, which is in a standby state, based on the frequency information and the time information held therein, and a frequency measurement block for measuring a frequency offset which is a displacement of a frequency oscillator of the GPS block with reference to the frequency information held in the external clock block and outputting information of the measured frequency offset to the external clock block.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.