Method and apparatus for extended range frequency correction burst detection
US6480555B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 2, 1999 |
| Grant date | Nov 12, 2002 |
| Priority date | — |
| Expiry date | Sep 2, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2007/047
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A radio communication device provides extended burst tone detection for a demodulated I and Q input signal. The device includes a first burst detector coupled with the input signal and provides a first detection signal when a FCB tone is detected. A frequency shifter is coupled with the input signal and frequency translates the input signal by a predetermined amount. A second burst detector is coupled with the translated input signal and provides a second detection signal when a FCB tone is detected. A combiner is coupled with the first and second detection signals and indicates FCB tone detection when either of the first and second detection signals indicate FCB tone detection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.