Long subscriber loops using automatic gain control mid-span extender unit
US7142619B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2001 |
| Grant date | Nov 28, 2006 |
| Priority date | — |
| Expiry date | Jan 5, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/24
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Systems and methods are described for long subscriber loops using automatic gain control. A method includes extending a digital subscriber loop including: producing an output signal in a first direction from a variable gain amplifier at a mid-span extender unit responsive to an input signal in the first direction from the digital subscriber loop; monitoring a signal strength of said output signal in the first direction at the mid-span extender unit; generating a gain control signal responsive to the signal strength at the mid-span extender unit; controlling a gain of the variable gain amplifier at the mid-span extender unit responsive to the gain control signal; and controlling a second gain of a second variable gain amplifier at said mid-span extender unit responsive to said gain control signal to produce an output signal in a second direction from said second variable gain amplifier at said mid-span extender unit responsive to a second input signal in said second direction from said digital subscriber loop.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.