Adjustment of transmit power based on an estimated electrical length of a loop
US7072391B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 23, 2002 |
| Grant date | Jul 4, 2006 |
| Priority date | — |
| Expiry date | Aug 24, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/66
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
To adjust transmit power of a DSL modem, an estimated electrical length of a loop is first determined when a 1st DSL modem at a 1st location transmits a plurality of signals to a 2nd DSL modem at a 2nd location. Each of the signals transmitted by the 1st DSL modem have a known frequency and are transmitted at a known power level. Upon receiving the signals, the 2nd DSL modem determines the received power level for each of the signals. The 2nd DSL modem then estimates an electrical length of a loop between the 1st and 2nd DSL modems for each of the signals received. The 2nd DSL modem then processes a plurality of estimated electrical lengths in accordance with a function to produce a determined electrical length. Having determined the electrical length, the 2nd DSL modem adjusts its transmit power accordingly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.