Frequency synchronizing method for a reference oscillator
US5509034A · kind A · utility
Inventor
Key dates
| Filing date | Feb 14, 1994 |
| Grant date | Apr 16, 1996 |
| Priority date | — |
| Expiry date | Feb 14, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03J7/02
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method and apparatus of frequency synchronization is described for a reference oscillator. Using a reference oscillator set to a first frequency, the process begins by scanning for a radio frequency carrier modulated with a predetermined pattern. The radio frequency carrier is located such that a received pattern comprising a frequency shifted version of the predetermined pattern is identified and time synchronization is established. The received pattern, the predetermined pattern, and stepped alterations to the first frequency are combined to provide a set of results that represent pattern correlation versus reference oscillator frequency. The first frequency is offset using the set of results, such that frequency synchronization is improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.