Method for asymmetrically attenuating signals in a transmission system
US5819159A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 25, 1996 |
| Grant date | Oct 6, 1998 |
| Priority date | — |
| Expiry date | Jul 25, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/22
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Ingress noise in a hybrid fiber-coax transmission system (10) may be reduced by employing asymmetric taps (30.sub.1 '-30.sub.8 ', 30.sub.1 "-30.sub.8 ",) between a pair of line extenders (28--28) for attenuating downstream and upstream information by different weights. The downstream weights of the taps are selected to achieve a substantial constant power level at each tap for individual subscribers (14--14). The upstream attenuation of each tap is selected to allow for a nearly constant level of subscriber-generated information to be received at the line extender while the subscriber generated upstream information is supplied to the taps at a constant value that is maximized to reduce the effect of ingress noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.