Crosstalk identification for spectrum management in broadband telecommunications systems
US6999583B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 2001 |
| Grant date | Feb 14, 2006 |
| Priority date | — |
| Expiry date | Oct 21, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B3/487
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Crosstalk between subscriber loops used to transmit different broadband services through the same bundled telephone cable is a significant limitation to providing digital subscriber line services. A method for estimating the crosstalk, identifying the sources of the crosstalk and predicting additional sources of crosstalk are disclosed. The crosstalk sources are identified in the frequency domain by maximizing the correlation with a “basis set” of received crosstalk PSDs which consist of the cascade of a finite set of known transmit PSDs types times a representative set of crosstalk couplings. Multiple crosstalk types are identified with a technique of successive spectral subtraction. This information can be used to perform crosstalk cancellation and spectrum management for DSL systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.