Method and apparatus for robust frequency tracking in strong channel interference using carrier signal relative strength and frequency error
US6324228A · kind A · utility
28Cited by
3References
39Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1998 |
| Grant date | Nov 27, 2001 |
| Priority date | — |
| Expiry date | Dec 30, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2027/0067
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present invention is a method and apparatus for tracking a frequency of a signal. The received signal is converted to an intermediate frequency (IF) signal using a frequency reference. An automatic gain control (AGC) is provided to the IF signal. The AGC generates a control value. The magnitude and phase parameters of the IF signal are estimated. A frequency error is estimated based on the phase parameter. A control quantity is generated based of the control value, the estimated magnitude parameter and the estimated frequency error. The control quantity adjusts the frequency reference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.