Hybrid fiber-coax system having at least one digital fiber node and increased upstream bandwidth
US5963844A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 18, 1996 |
| Grant date | Oct 5, 1999 |
| Priority date | — |
| Expiry date | Sep 18, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/17309
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Increased upstream bandwidth and reduced ingress noise in a shared hybrid fiber-coax transmission system (100) are obtained by modulating at least a portion of upstream signals received from subscribers to a high frequency band (e.g., 750-1000 MHz), thereby increasing the upstream bandwidth. The high frequency upstream signals are then digitally regenerated in the coaxial cable (200) plant prior to receipt at a fiber node (180). At the fiber node, the high-frequency upstream signals are again digitally regenerated and are then transmitted optically in a baseband digital format between the fiber node (180) and a head end (120). The digital regeneration of the high frequency upstream signals, and the optical transmission of such signals in a baseband digital format reduces the incidence of ingress noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.