ES2049459T3 - Un metodo y una disposicion para evitar la eliminacion de eco y/o la ecualizacion erroneas en un sistema de telecomunicacion. - Google Patents

Un metodo y una disposicion para evitar la eliminacion de eco y/o la ecualizacion erroneas en un sistema de telecomunicacion.

Info

Publication number
ES2049459T3
ES2049459T3 ES90850106T ES90850106T ES2049459T3 ES 2049459 T3 ES2049459 T3 ES 2049459T3 ES 90850106 T ES90850106 T ES 90850106T ES 90850106 T ES90850106 T ES 90850106T ES 2049459 T3 ES2049459 T3 ES 2049459T3
Authority
ES
Spain
Prior art keywords
eco
equalization
wrong
provision
removal
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.)
Expired - Lifetime
Application number
ES90850106T
Other languages
English (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
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Application granted granted Critical
Publication of ES2049459T3 publication Critical patent/ES2049459T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Analogue/Digital Conversion (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Facsimile Transmission Control (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

UN METODO Y UNA DISPOSICION PARA IMPEDIR LA ELIMINACION DE ECO ERRONEA Y/O LA ECUALIZACION RESULTANTE DE NO LINEALIDADES DE UN CONVERTIDOR D/A (12) Y/O UN TRANSFORMADOR A/D (15) EN UN SISTEMA DE TELECOMUNICACION, FORMANDOSE UNA SEÑAL DE ERROR (EN) PARA LA ACTUALIZACION DE UN FILTRO (16) PARA LA ELIMINACION DE ECO ADAPTATIVA Y/O UN FILTRO (18) PARA LA ECUALIZACION ADAPTATIVA. DE ACUERDO CON EL INVENTO, LA SEÑAL DE ERROR (EN) SE UTILIZA TAMBIEN PARA AJUSTAR LOS VALORES DE LOS DISPOSITIVOS DETERMINADOS (C41-C43, C1-C1), POR EJEMPLO CONDENSADORES, EN LOS CONVERTIDORES (12, 15) PARA EVITAR NO LINEALIDADES EN LOS CONVERTIDORES. LAS SEÑALES SE FORMAN CON ELLO A PARTIR DE LA SEÑAL DE ERROR CON EL PROPOSITO DE AJUSTAR LOS CONVERTIDORES DE ACUERDO CON ALGORITMOS APROPIADOS EN DISPOSITIVOS LOGICOS SEPARADOS (21, 22).
ES90850106T 1989-04-27 1990-03-20 Un metodo y una disposicion para evitar la eliminacion de eco y/o la ecualizacion erroneas en un sistema de telecomunicacion. Expired - Lifetime ES2049459T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8901542A SE463589B (sv) 1989-04-27 1989-04-27 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

Publications (1)

Publication Number Publication Date
ES2049459T3 true ES2049459T3 (es) 1994-04-16

Family

ID=20375822

Family Applications (1)

Application Number Title Priority Date Filing Date
ES90850106T Expired - Lifetime ES2049459T3 (es) 1989-04-27 1990-03-20 Un metodo y una disposicion para evitar la eliminacion de eco y/o la ecualizacion erroneas en un sistema de telecomunicacion.

Country Status (15)

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

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 (sv) * 1993-05-14 1994-12-19 Ericsson Telefon Ab L M Metod och ekosläckare för ekoutsläckning med ett antal kaskadkopplade adaptiva filter
US5812537A (en) * 1995-09-29 1998-09-22 Paradyne Corporation Echo canceling method and apparatus for data over cellular
US5650954A (en) * 1996-01-30 1997-07-22 Seagate Technology, Inc. Frequency and time domain adaptive filtration in a sampled communication channel
DE19611941C1 (de) * 1996-03-26 1997-12-11 Siemens Ag Schaltungsanordnung zur Leitungsanpassung und Echounterdrückung
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 (de) 2000-02-09 2001-08-30 Infineon Technologies Ag Schaltungsanordnung
US6813311B1 (en) 2000-03-14 2004-11-02 Globespan Virata Corporation Non-linear echo cancellation for wireless modems and the like
DE10318603B4 (de) 2003-04-24 2005-03-10 Infineon Technologies Ag Eingangsempfängerschaltung
US20050035891A1 (en) * 2003-08-14 2005-02-17 Tripath Technology, Inc. Digital-to-analog converter with level control
JP2009135595A (ja) * 2007-11-28 2009-06-18 Sony Corp スイッチトキャパシタ回路、スイッチトキャパシタフィルタ、およびシグマデルタａｄ変換器

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 (nl) * 1986-03-28 1987-10-16 At & T & Philips Telecomm Inrichting voor het kompenseren van niet-lineaire vervorming in een te digitaliseren ingangssignaal en een echokompensatiestelsel voorzien van een dergelijke inrichting.
NL8700983A (nl) * 1987-04-27 1988-11-16 Philips Nv Digitaal-analoog omzetter.
EP0313706B1 (en) * 1987-10-30 1992-04-29 International Business Machines Corporation Analog-to-digital and digital-to-analog conversion system and echo cancellation device including the same
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
IE901466L (en) 1990-10-27
SE8901542D0 (sv) 1989-04-27
DK0399968T3 (da) 1994-06-06
CA2030623C (en) 2001-10-16
FI100371B (sv) 1997-11-14
EP0399968B1 (en) 1994-02-16
US5189637A (en) 1993-02-23
NO905147D0 (no) 1990-11-28
BR9006719A (pt) 1991-08-06
JP3124771B2 (ja) 2001-01-15
WO1990013185A1 (en) 1990-11-01
FI905993A0 (fi) 1990-12-04
DE69006634D1 (de) 1994-03-24
DE69006634T2 (de) 1994-05-26
NO302008B1 (no) 1998-01-05
AU5563890A (en) 1990-11-16
EP0399968A1 (en) 1990-11-28
CA2030623A1 (en) 1990-10-28
SE463589B (sv) 1990-12-10
NO905147L (no) 1990-11-28
KR920700498A (ko) 1992-02-19
SE8901542L (sv) 1990-10-28
KR950014543B1 (en) 1995-12-05
JPH03505661A (ja) 1991-12-05
IE65531B1 (en) 1995-11-01
AU622799B2 (en) 1992-04-16

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