GPS timing receiver using oversampling
US5748144A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 26, 1996 |
| Grant date | May 5, 1998 |
| Priority date | — |
| Expiry date | Jan 26, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04R40/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A GPS timing receiver for providing a GPS-derived time signal. The GPS timing receiver includes a filter for filtering a GPS signal to a certain information bandwidth, a reference clock for generating a reference clock signal having a clock rate at least ten times the information bandwidth, a sampler using the reference clock signal for oversampling the filtered GPS signal, a correlation subsystem including a microprocessor for correlating the sampled GPS signal to the reference clock signal to measure a time difference between the GPS signal and the reference clock signal, and a time clock to issue a GPS-derived time signal based upon the reference clock signal and adjusted by the measured time difference in increments of the period of the reference clock signal. An optional frequency multiplier multiplies the reference clock rate enabling the time clock to adjust the GPS-derived time signal in increments of the period of the frequency multiplied reference clock signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.