Periodic DMT signals with cyclic extension
US7477683B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 20, 2004 |
| Grant date | Jan 13, 2009 |
| Priority date | — |
| Expiry date | Sep 30, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2025/03783
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method for digital communication includes generating time-domain symbols having a predetermined symbol duration in accordance with a discrete multi-tone (DMT) modulation scheme. A cyclic extension is added to each of the time-domain symbols so as to form data blocks having a block length that is not an integer multiple of the symbol duration. A training pattern is generated on one or more tones of the DMT modulation scheme, wherein the training pattern is periodic over a sequence of the data blocks with a period equal to the symbol duration. The sequence of the data blocks is transmitted over a communication channel to a receiver, which processes the training pattern so as to determine a response of the channel to the one or more tones.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.