Method for fine gains adjustment in an ADSL communications system
US5822374A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 7, 1996 |
| Grant date | Oct 13, 1998 |
| Priority date | — |
| Expiry date | Jun 7, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L5/0044
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A communications system (30) includes a transceiver (42) for transmitting a plurality of bins. Individual bin BERs (bit-error-rates) are iteratively equalized. This is accomplished by applying a fine gains adjustment to the transmit power of the transceiver (42). Specifically, the BER of the bins is equalized by calculating an adjustment gain and subtracting the adjustment gain from the bin currently having the maximum margin and adding the same adjustment gain to the bin currently having the minimum margin. The iterations continue until all of the bin margins are within a predetermined threshold. This changes the individual bin transmit power levels without substantially changing the aggregate transmit power level. The BER is substantially equalized, without causing the individual transmit power levels to exceed a predetermined range, such as that required by ANSI T1E1.4.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.