Compensation for frequency adjustment in mobile communication-positioning device with shared oscillator
US7299024B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 2003 |
| Grant date | Nov 20, 2007 |
| Priority date | — |
| Expiry date | Aug 21, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/3805
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a mobile communication device, a method for compensating for a frequency adjustment in an oscillator shared between a communication circuit and a positioning signal receiver is provided. In one embodiment, a method for determining the operating frequency of an oscillator detects a beginning time point of a reference signal received by the mobile communication device and enables a counter to count in step with a clock signal derived from the oscillator. When an ending time point of the reference signal is received by the mobile communication device, the count is stopped, and the frequency of the oscillator is determined based on the count in the counter and an expected time that elapsed between the beginning time point and the ending time point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.