FOERFARANDE FOER ATT UNDVIKA FELAKTIG EKOELIMINERING OCH/ELLER UTJAEMNING TILL FOELJD AV OLINJAERITETER I EN D/A-OMVANDLARE OCH/ELLER EN A/D-OMVANDLARE I EN TELEKOMMUNIKATIONSANLAEGGNING, SAMT ANORDNING FOER UTOEVANDE AV FOERFARANDET I SAMBAND MED D/A-OMVANDLING OCH ANORDNING FOER UTOEVANDE AV FOERFARANDET I SAMBAND MED A/D-OMVANDLING

摘要

A method and arrangement for avoiding erroneous echo-elimination and/or equalization resulting from non-linearities of a D/A-converter (12) and/or an A/D-converter (15) in a telecommunication system, an error signal (en) being formed for updating a filter (16) for adaptive echo-elimination and/or a filter (18) for adaptive equalization. In accordance with the invention, the error signal (en) is also used to adjust the values of given devices (C41 - C43, C1 - CI), e.g. capacitors, in the converters (12, 15) for avoiding non-linearities in the converters. The signals are therewith formed from the error signal for the purpose of adjusting the converters in accordance with appropriate algorithms in separate logic devices (21, 22).