CA2030623A1 - A method and arrangement for avoiding erroneous echo-elimination and/or equalization in a telecommunication system - Google Patents

A method and arrangement for avoiding erroneous echo-elimination and/or equalization in a telecommunication system

Info

Publication number
CA2030623A1
CA2030623A1 CA002030623A CA2030623A CA2030623A1 CA 2030623 A1 CA2030623 A1 CA 2030623A1 CA 002030623 A CA002030623 A CA 002030623A CA 2030623 A CA2030623 A CA 2030623A CA 2030623 A1 CA2030623 A1 CA 2030623A1
Authority
CA
Canada
Prior art keywords
elimination
equalization
arrangement
telecommunication system
echo
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002030623A
Other languages
French (fr)
Other versions
CA2030623C (en
Inventor
Erik Anders Eriksson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2030623A1 publication Critical patent/CA2030623A1/en
Application granted granted Critical
Publication of CA2030623C publication Critical patent/CA2030623C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
    • H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers
    • H04B3/235—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers combined with adaptive equaliser

Abstract

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 (e n) 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 (e n) is also used to adjust the values of given devices (C41 - C43, C1 - C1), 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 adjus-ting the converters in accordance with appropriate algorithms in separate logic devices (21, 22).
CA002030623A 1989-04-27 1990-03-20 A method and arrangement for avoiding erroneous echo-elimination and/or equalization in a telecommunication system Expired - Fee Related CA2030623C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE8901542-4 1989-04-27
SE8901542A SE463589B (en) 1989-04-27 1989-04-27 PROCEDURES TO AVOID INCORRECT ECO-ELIMINATION AND / OR ELIMINATION DUE TO OIL INJURIES IN A D / A CONVERTER AND / OR A / D CONVERTER IN A TELECOMMUNICATION CONDITION, INCLUDING CONDUCT DOES EXERCISE OF THE PROCEDURE IN CONNECTION WITH A / D CONVERSION
PCT/SE1990/000177 WO1990013185A1 (en) 1989-04-27 1990-03-20 A method and arrangement for avoiding erroneous echo-elimination and/or equalization in a telecommunication system

Publications (2)

Publication Number Publication Date
CA2030623A1 true CA2030623A1 (en) 1990-10-28
CA2030623C CA2030623C (en) 2001-10-16

Family

ID=20375822

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002030623A Expired - Fee Related CA2030623C (en) 1989-04-27 1990-03-20 A method and arrangement for avoiding erroneous echo-elimination and/or equalization in a telecommunication system

Country Status (15)

Country Link
US (1) US5189637A (en)
EP (1) EP0399968B1 (en)
JP (1) JP3124771B2 (en)
KR (1) KR950014543B1 (en)
AU (1) AU622799B2 (en)
BR (1) BR9006719A (en)
CA (1) CA2030623C (en)
DE (1) DE69006634T2 (en)
DK (1) DK0399968T3 (en)
ES (1) ES2049459T3 (en)
FI (1) FI100371B (en)
IE (1) IE65531B1 (en)
NO (1) NO302008B1 (en)
SE (1) SE463589B (en)
WO (1) WO1990013185A1 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5157653A (en) * 1990-08-03 1992-10-20 Coherent Communications Systems Corp. Residual echo elimination with proportionate noise injection
SE501248C2 (en) * 1993-05-14 1994-12-19 Ericsson Telefon Ab L M Method and echo extinguisher for echo extinguishing with a number of cascade-coupled adaptive filters
US5650954A (en) * 1996-01-30 1997-07-22 Seagate Technology, Inc. Frequency and time domain adaptive filtration in a sampled communication channel
US5812537A (en) * 1995-09-29 1998-09-22 Paradyne Corporation Echo canceling method and apparatus for data over cellular
DE19611941C1 (en) * 1996-03-26 1997-12-11 Siemens Ag Circuit arrangement for line matching and echo cancellation
US6184692B1 (en) * 1997-10-29 2001-02-06 Lucent Technologies, Inc. Loop back test apparatus and technique
US6028929A (en) * 1997-11-14 2000-02-22 Tellabs Operations, Inc. Echo canceller employing dual-H architecture having improved non-linear echo path detection
US6185261B1 (en) 1998-11-02 2001-02-06 Broadcom Corporation Determination of transmitter distortion
DE10005620A1 (en) 2000-02-09 2001-08-30 Infineon Technologies Ag Circuit arrangement
US6813311B1 (en) 2000-03-14 2004-11-02 Globespan Virata Corporation Non-linear echo cancellation for wireless modems and the like
DE10318603B4 (en) * 2003-04-24 2005-03-10 Infineon Technologies Ag Input reception circuit for weak high speed signal for generating several output signals, which can be processed at lower detecting speed
US20050035891A1 (en) * 2003-08-14 2005-02-17 Tripath Technology, Inc. Digital-to-analog converter with level control
JP2009135595A (en) * 2007-11-28 2009-06-18 Sony Corp Switched capacitor circuit, switched capacitor filter, and sigma-delta a/d converter

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3732410A (en) * 1969-12-22 1973-05-08 Postmaster Department Res Labo Self adaptive filter and control circuit therefor
US4200863A (en) * 1977-10-03 1980-04-29 The Regents Of The University Of California Weighted capacitor analog/digital converting apparatus and method
US4129863A (en) * 1977-10-03 1978-12-12 Regents Of The University Of California Weighted capacitor analog/digital converting apparatus and method
US4476456A (en) * 1981-11-03 1984-10-09 Texas Instruments Incorporated Combination of an analog to digital converter and sampling switch
US4669116A (en) * 1982-12-09 1987-05-26 Regents Of The University Of California Non-linear echo cancellation of data signals
NL8600815A (en) * 1986-03-28 1987-10-16 At & T & Philips Telecomm DEVICE FOR COMPENSATING FOR NON-LINEAR DISTORTION IN A DIGITIZABLE INPUT SIGNAL AND AN ECHO COMPENSATION SYSTEM PROVIDED WITH SUCH A DEVICE.
NL8700983A (en) * 1987-04-27 1988-11-16 Philips Nv DIGITAL-ANALOGUE CONVERTER.
DE3778702D1 (en) * 1987-10-30 1992-06-04 Ibm ANALOG-DIGITAL / DIGITAL-ANALOG CONVERTER SYSTEM AND DEVICE FOR ECHO CANCELLATION USING SUCH A SYSTEM.
US4999830A (en) * 1989-09-25 1991-03-12 At&T Bell Laboratories Communication system analog-to-digital converter using echo information to improve resolution
US4977591A (en) * 1989-11-17 1990-12-11 Nynex Corporation Dual mode LMS nonlinear data echo canceller

Also Published As

Publication number Publication date
DK0399968T3 (en) 1994-06-06
AU622799B2 (en) 1992-04-16
SE463589B (en) 1990-12-10
AU5563890A (en) 1990-11-16
ES2049459T3 (en) 1994-04-16
US5189637A (en) 1993-02-23
KR950014543B1 (en) 1995-12-05
DE69006634D1 (en) 1994-03-24
FI100371B (en) 1997-11-14
SE8901542D0 (en) 1989-04-27
BR9006719A (en) 1991-08-06
NO302008B1 (en) 1998-01-05
NO905147D0 (en) 1990-11-28
JP3124771B2 (en) 2001-01-15
IE65531B1 (en) 1995-11-01
EP0399968B1 (en) 1994-02-16
JPH03505661A (en) 1991-12-05
EP0399968A1 (en) 1990-11-28
SE8901542L (en) 1990-10-28
CA2030623C (en) 2001-10-16
IE901466L (en) 1990-10-27
KR920700498A (en) 1992-02-19
WO1990013185A1 (en) 1990-11-01
FI905993A0 (en) 1990-12-04
DE69006634T2 (en) 1994-05-26
NO905147L (en) 1990-11-28

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