Synchronization in OFDM systems
US6876675B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 5, 1999 |
| Grant date | Apr 5, 2005 |
| Priority date | — |
| Expiry date | Feb 5, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2678
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Highly effective systems and methods for synchronizing OFDM receiver parameters to an OFDM transmitter are provided. These parameters may include carrier frequency, burst timing, and cyclic prefix length. These systems and methods incorporate special structural features into the OFDM signal to facilitate synchronization. In one embodiment, a supplemental cyclic prefix is added to an OFDM signal to facilitate synchronization. In an alternative embodiment, a synchronization burst with a periodic structure is used to facilitate synchronization. According to the present invention, synchronization may be maintained even if low cost analog oscillator components are used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.