Synchronizing pulse generating method and method of receiving OFDM signal
US7227834B1 · kind B1 · utility
16Cited by
8References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 24, 2000 |
| Grant date | Jun 5, 2007 |
| Priority date | — |
| Expiry date | Feb 12, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2665
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In an OFDM receiver, a synchronisation pulse for defining a Fast Fourier Transform window is generated by examining the output of a correlator to find a sub-interval within which there is maximum correlation between samples of the symbol separated by the length of the useful part of the symbol. The synchronisation pulse is generated during this sub-interval (102). Adjustments to the timing of the synchronisation pulse are made only if the current error is significant and persistent. A signal representing the amount of adjustment is used to determine phase rotations applied to the output of the FFT circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.