Method and apparatus for detecting a frequency synchronization signal
US6226336A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 1998 |
| Grant date | May 1, 2001 |
| Priority date | — |
| Expiry date | Feb 20, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03J7/04
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In a communication system including at least one transmitter and at least one receiver, a frequency synchronization signal transmitted from the transmitter to the receiver is detected. An in-phase component of a signal received by the receiver is delayed, and the delayed in-phase component is multiplied by a quadrature component of the received signal. The steps of delaying and multiplying are repeated for a predetermined number of samples of the received signal to produce an estimated cross-correlation value. A determination is made whether the estimated cross-correlation value is at least as great as a predetermined threshold, indicating that the transmitted signal is a frequency synchronization signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.