Asymmetric digital subscriber line methods suitable for long subscriber loops
US6507606B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2001 |
| Grant date | Jan 14, 2003 |
| Priority date | — |
| Expiry date | Mar 28, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2654
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Systems and methods are described for asymmetric digital subscriber loops. A method includes utilizing a circuit having a first end and a second end, the circuit having a first amplification interface connecting the first end to the second end in a first direction, and a second amplification interface connecting the second end to the first end in a second direction; adapting the first amplification interface to provide a first gain adjustment as a function of a first attenuation of a first communication by a first direction impedance from the transmission medium while transmitting in the first direction, the first communication within a first frequency range over the transmission medium from the first end to the second end; and adapting the second amplification interface to provide a second gain adjustment as a function of a second attenuation of a second communication by a second direction impedance from the transmission medium while transmitting in the second direction, the second communication within a second frequency range over the transmission medium from the second end to said first end. An apparatus includes a modulator for transmitting a first communication, in a first dir…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.