Using equalization coefficients of end devices in a cable television network to determine and diagnose impairments in upstream channels
US8526485B2 · kind B2 · utility
15Cited by
157References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 23, 2009 |
| Grant date | Sep 3, 2013 |
| Priority date | — |
| Expiry date | May 23, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/25751
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A system estimates impairment contributions for upstream communications in a cable television system. The system receives equalization coefficients used by end devices in the cable television system. The equalization coefficients are used by equalizers to mitigate distortion in upstream channels for the end devices. The system analyzes the coefficients based on impairment thresholds to determine whether impairment problems exist and to identify the types of impairment problems that exist.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.