Technique for reverse transport of data in a hybrid fiber coax cable system
US7231655B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 6, 2001 |
| Grant date | Jun 12, 2007 |
| Priority date | — |
| Expiry date | Apr 18, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/615
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a hybrid fiber coax (HFC) cable system, data is communicated upstream from user terminals to a headend of the system to realize various interactive services. The user terminals generate analog modulated signals representing the user data, which populate different channels in a reverse passband of the system. In accordance with the invention, the analog modulated signals are transformed to the corresponding digital baseband signals containing the data. The resulting digital baseband signals are optically transmitted to the headend, thereby efficiently utilizing the limited capacity of the fiber optical portion of the HFC cable system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.