Dynamic allocation of cyclic extension in orthogonal frequency division multiplexing systems
US7400573B2 · kind B2 · utility
20Cited by
6References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 29, 2003 |
| Grant date | Jul 15, 2008 |
| Priority date | — |
| Expiry date | Oct 30, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/0212
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Briefly, in accordance with one embodiment of the invention, an orthogonal frequency division multiplexing system may provide a dynamically calculated cyclic extension, the length of which may be based at least in part on a delay spread due to an experienced environmental condition. The length of the cyclic extension may be calculated by determining a channel impulse response, and then computing the energy distribution of the channel impulse response. The length of the cyclic extension may then be set according to the energy distribution of the channel impulse response.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.