Apparatus and method for automatic frequency correction for a receiver system
US7680224B2 · kind B2 · utility
1Cited by
16References
14Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 25, 2005 |
| Grant date | Mar 16, 2010 |
| Priority date | — |
| Expiry date | Dec 14, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2027/0065
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system and method is shown for automatic frequency correction in a receiver, where the number of clock cycles in a baseband data signal, such as an I or Q channel of the receiver or an XOR of the I and Q channels, for a “1” state and a “0” state of a received data signal are each determined and the difference between the two is used to calculate a subsequent frequency offset correction value. The subsequent frequency offset correction value is added to a current offset correction value to obtain an actual offset correction value. The actual offset correction value is then used to adjust the frequency of the receiver clock.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.