Cyclic delay diversity for mitigating intersymbol interference in OFDM systems
US6842487B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 22, 2000 |
| Grant date | Jan 11, 2005 |
| Priority date | — |
| Expiry date | Sep 26, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/0676
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and/or an apparatus for mitigating intersymbol interference. In systems which employ transmission diversity when transmitting symbols which have a guard interval, the multiple versions of the transmitted symbols have the samples of the transmitted symbols shifted relative to each version transmitted. The shifted samples of the transmitted symbol are shifted from the end of the transmitted symbol into the beginning of the transmitted symbol. A last number of samples of the transmitted symbol are copied and placed in the guard interval which precedes the symbol. The guard interval and the symbol are transmitted to a receiver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.