System and method for performing time domain equalization
US6353644B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 3, 1999 |
| Grant date | Mar 5, 2002 |
| Priority date | — |
| Expiry date | May 3, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2025/03477
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Disclosed is a system and method for signal conditioning and equalization in the time domain, preferably in a discrete multi-tone (DMT) modem. The system preferably includes a processor operating according to operating logic stored on a memory although a dedicated logical circuit may be employed. The operating logic includes logic executing the function of a low pass filter having a predetermined cutoff frequency configured to process a digitized data signal having a first sample rate f0, producing a filtered data signal at a second sample rate f1. The operating logic further includes logic which executes the function of a time domain equalizer, the time domain equalizer being configured to process the filtered signal to shorten the impulse response of the channel while at the same time, the time domain equalizer down-samples the filtered signal from the second sample rate f1, to a third sample rate f2 for further processing in the frequency domain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.