Method and apparatus for time-domain equalization in FDM-based discrete multi-tone modems
US6404806B1 · kind B1 · utility
27Cited by
2References
25Claims
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Key dates
| Filing date | Dec 31, 1998 |
| Grant date | Jun 11, 2002 |
| Priority date | — |
| Expiry date | Dec 31, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2025/03414
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A time domain equalizer for a discrete multi-tone modem that includes an estimation of the contribution of out of band noise and echo to the overall channel impulse response. At start up the modem estimates out of band noise and echo. Using a minimum mean square error analysis, the time domain equalizer taps can be determined, taking into account the estimated out of band contribution. As a result, less complex duplexing filters, and time domain equalizer, are required.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.