FR2363944A1 - Dispositif combine d'annulation d'echo et d'egalisation pour transmission de donnees en duplex - Google Patents

Dispositif combine d'annulation d'echo et d'egalisation pour transmission de donnees en duplex

Info

Publication number
FR2363944A1
FR2363944A1 FR7726441A FR7726441A FR2363944A1 FR 2363944 A1 FR2363944 A1 FR 2363944A1 FR 7726441 A FR7726441 A FR 7726441A FR 7726441 A FR7726441 A FR 7726441A FR 2363944 A1 FR2363944 A1 FR 2363944A1
Authority
FR
France
Prior art keywords
data transmission
transmission
echo cancellation
equalization device
duplex data
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
FR7726441A
Other languages
English (en)
Other versions
FR2363944B1 (fr
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of FR2363944A1 publication Critical patent/FR2363944A1/fr
Application granted granted Critical
Publication of FR2363944B1 publication Critical patent/FR2363944B1/fr
Granted 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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1423—Two-way operation using the same type of signal, i.e. duplex for simultaneous baseband signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Bidirectional Digital Transmission (AREA)

Abstract

L'invention concerne la transmission de données. Le dispositif de l'invention comprend essentiellement un annuleur d'écho 34 et un égaliseur 38 qui fonctionnent sous la commande d'un signal d'erreur commun engendré par un calculateur d'erreur 42. Ce dispositif permet une transmission en duplex sur une voie à deux fils, en utilisant la totalité de la largeur de bande disponible pour chaque sens de transmission. Application à la transmission de données sur le réseau téléphonique public.
FR7726441A 1976-09-07 1977-08-31 Dispositif combine d'annulation d'echo et d'egalisation pour transmission de donnees en duplex Granted FR2363944A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/720,999 US4074086A (en) 1976-09-07 1976-09-07 Joint adaptive echo canceller and equalizer for two-wire full-duplex data transmission

Publications (2)

Publication Number Publication Date
FR2363944A1 true FR2363944A1 (fr) 1978-03-31
FR2363944B1 FR2363944B1 (fr) 1981-10-30

Family

ID=24896101

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7726441A Granted FR2363944A1 (fr) 1976-09-07 1977-08-31 Dispositif combine d'annulation d'echo et d'egalisation pour transmission de donnees en duplex

Country Status (9)

Country Link
US (1) US4074086A (fr)
JP (1) JPS5842665B2 (fr)
BE (1) BE858374A (fr)
CA (1) CA1109133A (fr)
DE (1) DE2740141C3 (fr)
FR (1) FR2363944A1 (fr)
GB (1) GB1586225A (fr)
IT (1) IT1091005B (fr)
NL (1) NL7709797A (fr)

Families Citing this family (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE426763B (sv) * 1977-01-17 1983-02-07 Trt Telecom Radio Electr Digital ekoeliminator for ett modem for dataoverforing genom modulation av en bervag
DE2921780C3 (de) * 1979-05-29 1982-02-11 Siemens AG, 1000 Berlin und 8000 München Verfahren und Schaltungsanordnung zur Übertragung von Daten über eine Zweidrahtleitung
CA1175521A (fr) * 1980-04-09 1984-10-02 David D. Falconer Elimination des echos dans un systeme duplex a deux fils pour la transmission des donnees avec estimation des composantes de donnees au terminal eloigne
US4535206A (en) * 1980-04-09 1985-08-13 At&T Bell Laboratories Echo cancellation in two-wire full-duplex data transmission with estimation of far-end data components
DE3047425A1 (de) * 1980-12-17 1982-07-15 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Anordnung zur nachstellung der echoloescherkoeffizienten bei kombinierter adaptiver echoloeschung und entzerrung
US4464545A (en) * 1981-07-13 1984-08-07 Bell Telephone Laboratories, Incorporated Echo canceller
US4411006A (en) * 1981-09-09 1983-10-18 Communication Satellite Corporation Digital bit rate synchronizer for digital echo cancellers and similar signal processing devices
SE426764B (sv) * 1981-11-02 1983-02-07 Ellemtel Utvecklings Ab Forfarande att astadkomma adaptiv ekoeliminering vid overforing av digital information i duplex jemte anordning for utforande av forfarandet
JPS5912639A (ja) * 1982-07-12 1984-01-23 Toshiba Corp エコ−キヤンセラ
FR2541837A1 (fr) * 1983-02-25 1984-08-31 Trt Telecom Radio Electr Procede de reduction du temps de convergence d'un annuleur d'echo et dispositif pour mettre en oeuvre ce procede
US4652703A (en) * 1983-03-01 1987-03-24 Racal Data Communications Inc. Digital voice transmission having improved echo suppression
US4609788A (en) * 1983-03-01 1986-09-02 Racal Data Communications Inc. Digital voice transmission having improved echo suppression
JPS601947A (ja) * 1983-06-17 1985-01-08 Nec Corp 二線全二重通信方式
DE3327467A1 (de) * 1983-07-29 1985-02-14 Siemens AG, 1000 Berlin und 8000 München Verfahren und schaltungsanordnung zur kompensation von echosignalen
CH660655A5 (de) * 1983-09-23 1987-05-15 Siemens Ag Albis Digitale gabelanordnung.
JPS6125010A (ja) * 1984-07-16 1986-02-03 Asahi Optical Co Ltd 複数のエンコ−ダ−を有する測量機器における測定処理回路
NZ214905A (en) * 1985-01-29 1988-09-29 British Telecomm Noise cancellation by adaptive filter compensates for timing variations
US4631734A (en) * 1985-03-21 1986-12-23 At&T Bell Laboratories Cross-polarization canceler/equalizer
US4760596A (en) * 1986-02-25 1988-07-26 Gte Laboratories Incorporated Adaptive echo cancellation and equalization system signal processor and method therefor
EP0239293A3 (fr) * 1986-03-24 1988-12-14 Gpt Limited Systèmes de transmission de données
US4742510A (en) * 1986-04-04 1988-05-03 Massachusetts Institute Of Technology Near and far echo canceller for data communications
FR2614484B1 (fr) * 1986-12-30 1994-04-08 Telecommunications Sa Terminal de transmission de donnees sur une voie analogique bidirectionnelle avec annulation d'echo couplee au rythme reception
US4970715A (en) * 1987-03-27 1990-11-13 Universal Data Systems, Inc. Modem with improved remote echo location and cancellation
US4813073A (en) * 1987-07-02 1989-03-14 Codex Corporation Echo cancellation
US5051981A (en) * 1988-01-21 1991-09-24 Codex Corporation Digital filtering
WO1989007370A1 (fr) * 1988-02-01 1989-08-10 Concord Data Systems, Inc. Procede et appareil d'elimination de tele-echos
US4995030A (en) * 1988-02-01 1991-02-19 Memotec Datacom, Inc. Far end echo cancellation method and apparatus
US5481564A (en) * 1990-07-20 1996-01-02 Fujitsu Limited Received data adjusting device
JPH10135875A (ja) * 1996-10-28 1998-05-22 Nec Corp エコーキャンセラ装置
US6430287B1 (en) 1997-03-25 2002-08-06 Level One Communications, Inc. Combined parallel adaptive equalizer/echo canceller
US6285709B1 (en) 1997-10-31 2001-09-04 3 Com Corporation Error filtering in a hybrid equalizer system
US7164659B2 (en) * 1999-12-09 2007-01-16 Broadcom Corporation Adaptive gain control based on echo canceller performance information
US7187907B2 (en) * 2000-05-09 2007-03-06 Bernard Widrow Simultaneous two-way transmission of information signals in the same frequency band
US6990083B1 (en) * 2000-10-27 2006-01-24 Tioga Technologies, Ltd. Method and device for computing echo-cancellation coefficients using FFT
US7146391B2 (en) * 2002-01-24 2006-12-05 Broadcom Corporation Method and system for implementing SLICE instructions
DE10247208A1 (de) * 2002-10-10 2004-04-22 Infineon Technologies Ag Brückenschaltung zur Echounterdrückung in Kommunikationseinrichtungen
US6996230B1 (en) 2003-06-13 2006-02-07 Adtran, Inc. Echo-canceler for precoded fractionally spaced receiver using signal estimator
US8077763B2 (en) * 2003-10-21 2011-12-13 Symbol Technologies, Inc. Full-duplex radio frequency echo cancellation
US8054873B2 (en) * 2007-03-15 2011-11-08 Netlogic Microsystems, Inc. Joint phased training of equalizer and echo canceller
US8040943B1 (en) 2007-03-15 2011-10-18 Netlogic Microsystems, Inc. Least mean square (LMS) engine for multilevel signal
US8064510B1 (en) 2007-03-15 2011-11-22 Netlogic Microsystems, Inc. Analog encoder based slicer
US8619897B2 (en) * 2008-12-09 2013-12-31 Netlogic Microsystems, Inc. Method and apparatus of frequency domain echo canceller
US8958497B2 (en) * 2012-06-12 2015-02-17 Silicon Image, Inc. Simultaneous transmission of clock and bidirectional data over a communication channel
US11165463B1 (en) * 2019-07-12 2021-11-02 Cable Television Laboratories, Inc. Systems and methods for broadband signal equalization

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2333389A1 (fr) * 1975-11-28 1977-06-24 Western Electric Co Dispositif de suppression d'echo pour voie de transmission

Family Cites Families (4)

* 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
US3597541A (en) * 1969-12-23 1971-08-03 Sylvania Electric Prod Decision-directed adapted equalizer circuit
GB1434239A (en) * 1972-08-10 1976-05-05 Siemens Ag Echo cancellers
US3878468A (en) * 1974-01-30 1975-04-15 Bell Telephone Labor Inc Joint equalization and carrier recovery adaptation in data transmission systems

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2333389A1 (fr) * 1975-11-28 1977-06-24 Western Electric Co Dispositif de suppression d'echo pour voie de transmission

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NV8089/76 *

Also Published As

Publication number Publication date
IT1091005B (it) 1985-06-26
JPS5842665B2 (ja) 1983-09-21
BE858374A (fr) 1978-01-02
US4074086A (en) 1978-02-14
FR2363944B1 (fr) 1981-10-30
DE2740141A1 (de) 1978-03-09
CA1109133A (fr) 1981-09-15
NL7709797A (nl) 1978-03-09
DE2740141B2 (fr) 1980-07-03
JPS5334406A (en) 1978-03-31
DE2740141C3 (de) 1981-03-19
GB1586225A (en) 1981-03-18

Similar Documents

Publication Publication Date Title
FR2363944A1 (fr) Dispositif combine d'annulation d'echo et d'egalisation pour transmission de donnees en duplex
Hayes Adaptive feedback communications
US4985892A (en) Baseband local area network using ordinary telephone wiring
BR9811553A (pt) Receptor de dados em rajada auto-adaptavelmente equalizado e processo para dados de banda larga de fluxo contrário
FR2363945A1 (fr) Suppresseur d'echo
KR19990036075A (ko) 양방향 릴레이통신을 위한 자기 간섭 소거
AR004797A1 (es) Metodo para sincronizar los componentes de un sistema de telecomunicaciones
FR2472897A1 (fr) Dispositif de transmission d'information de commande dans un systeme de commutation
FR2382725A1 (fr) Dispositif de transmission de signaux d'alarme
FR2612029A1 (fr) Dispositif pour la realisation de la fonction " mains-libres " dans un poste telephonique, associant les fonctions de commutation de gain et d'annulation d'echo
HUP0004241A2 (hu) Helymeghatározó rendszer digitális telefonhálózatokhoz, helymeghatározó rendszert tartalmazó digitális telefonhálózat, kézibeszélő ilyen digitális telefonhálózathoz és eljárás mobil vevőkészülék helyének meghatározására
FR2472895A1 (fr) Dispositif de verification de continuite pour un systeme de commutation telephonique
Smol et al. Telecommunications: a systems approach
EP0334746A1 (fr) Dispositif pour l'établissement et l'acheminement de communications téléphoniques entre abonnés d'un réseau et/ou d'un réseau téléphonique filaire
KR890702347A (ko) 반향 소거장치
EP0595911A1 (fr) Interface pour circuits de tarif de base.
FR2452832A1 (fr) Dispositif de commande de sonnerie
FR2422295A1 (fr) Modulateur-demodulateur de donnees
CA2132594C (fr) Systeme de transmission de donnees par satellite entre centres de commutation telephoniques, station de trafic et procede de transmission correspondants
EP0018617A1 (fr) Système d'échange de messages codés entre stations
Pierce The transmission of computer data
FR2454731A1 (fr) Systeme de transmission pour le transfert de symboles de donnees bivalents
EP0112952B1 (fr) Système de connexion de stations de travail du type multipoint
FR2376584A1 (fr) Dispositif de transmission d'informations destine a relier plusieurs abonnes a un central
CA2057942A1 (fr) Systeme recepteur pour le traitement de signaux recus sur des voies de diversite

Legal Events

Date Code Title Description
ST Notification of lapse