Estimating GPS reference frequency drift from PDC-handset VCO-bursts
US7224950B2 · kind B2 · utility
3Cited by
4References
9Claims
0Family size
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Key dates
| Filing date | Aug 27, 2003 |
| Grant date | May 29, 2007 |
| Priority date | — |
| Expiry date | Aug 31, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/235
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A combination mobile phone and navigation satellite receiver comprises a circuit for correcting GPS receiver reference frequency drift by using VCO burst information periodically received by a PDC handset. A corrected GPS receiver reference frequency drift then enables faster initialization and stable operation of the position solutions made available to users. A GPS numeric controlled oscillator (NCO) receives a PDC handset VCO sample.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.