FR2457042A1 - Compensateur d'echo a filtre passe-haut - Google Patents

Compensateur d'echo a filtre passe-haut

Info

Publication number
FR2457042A1
FR2457042A1 FR8010459A FR8010459A FR2457042A1 FR 2457042 A1 FR2457042 A1 FR 2457042A1 FR 8010459 A FR8010459 A FR 8010459A FR 8010459 A FR8010459 A FR 8010459A FR 2457042 A1 FR2457042 A1 FR 2457042A1
Authority
FR
France
Prior art keywords
signal
data
echo
residual
digital
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
FR8010459A
Other languages
English (en)
Other versions
FR2457042B1 (fr
Inventor
Wilfred Andre Maria Snijders
Nicolaas Alphonsus M Verhoeckx
Petrus Josephus Van Gerwen
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2457042A1 publication Critical patent/FR2457042A1/fr
Application granted granted Critical
Publication of FR2457042B1 publication Critical patent/FR2457042B1/fr
Granted legal-status Critical Current

Links

Classifications

    • 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
    • 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

Landscapes

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

Abstract

COMPENSATEUR D'ECHO POUR UN SYSTEME DE TRANSFERT DE DONNEES, COMPORTANT DES LIAISONS A DEUX FILS ET A QUATRE FILS. CE COMPENSATEUR D'ECHO EST POURVU D'UN DISPOSITIF DE TRAITEMENT DE SIGNAUX REGLABLE AUQUEL EST AMENE LE SIGNAL DE DONNEES A TRANSFERER ET QUI FOURNIT UN SIGNAL D'ECHO SYNTHETIQUE. DANS LE TRAJET DE RECEPTION DE LA LIAISON A QUATRE FILS EST PRESENT UN SIGNAL QUI EST FORME PAR UN SIGNAL DE DONNEES RECU ET UN SIGNAL D'ECHO. LE SIGNAL D'ECHO SYNTHETIQUE EST SOUSTRAIT DES SIGNAUX PRESENTS DANS LE TRAJET DE RECEPTION, POUR PRODUIRE UN SIGNAL RESIDUEL. POUR LE REGLAGE DU DISPOSITIF DE TRAITEMENT DE SIGNAUX, UN DISPOSITIF DE REGLAGE AUQUEL UN SIGNAL DE COMMANDE NUMERIQUE EST AMENE Y EST CONNECTE, CE SIGNAL NUMERIQUE ETANT FORME PAR UNE VERSION NUMERIQUE DU SIGNAL RESIDUEL. AFIN D'AMELIORER LA QUALITE DU SIGNAL RESIDUEL QUI EST OBTENU AU CAS OU LE SIGNAL DE DONNEES CONTIENT DES LONGUES SERIES DE SYMBOLES DE DONNEES D'UN MEME TYPE, LE SIGNAL RESIDUEL EST SOUMIS A UNE OPERATION DE FILTRAGE PASSE-HAUT ET LA VERSION NUMERIQUE DU SIGNAL RESIDUEL AINSI FILTRE EST AMENEE, EN TANT QUE SIGNAL DE COMMANDE, AU DISPOSITIF DE REGLAGE. APPLICATION: TRANSMISSION DE DONNEES.
FR8010459A 1979-05-14 1980-05-09 Compensateur d'echo a filtre passe-haut Granted FR2457042A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7903759A NL7903759A (nl) 1979-05-14 1979-05-14 Echocompensator met hoogdoorlaatfilter.

Publications (2)

Publication Number Publication Date
FR2457042A1 true FR2457042A1 (fr) 1980-12-12
FR2457042B1 FR2457042B1 (fr) 1984-10-19

Family

ID=19833173

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8010459A Granted FR2457042A1 (fr) 1979-05-14 1980-05-09 Compensateur d'echo a filtre passe-haut

Country Status (10)

Country Link
US (1) US4362909A (fr)
JP (1) JPS55153435A (fr)
AU (1) AU537041B2 (fr)
CA (1) CA1152595A (fr)
DE (1) DE3018238C2 (fr)
FR (1) FR2457042A1 (fr)
GB (1) GB2050127B (fr)
IT (1) IT1130590B (fr)
NL (1) NL7903759A (fr)
SE (1) SE446241B (fr)

Families Citing this family (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2490901A1 (fr) * 1980-09-19 1982-03-26 Trt Telecom Radio Electr Annuleur d'echo numerique muni d'un convertisseur analogique-numerique a dynamique reglable
NL8100650A (nl) * 1981-02-11 1982-09-01 Philips Nv Inrichting voor het corrigeren van pulsvervorming bij homochrone datatransmissie.
NL8102225A (nl) * 1981-05-07 1982-12-01 Philips Nv Inrichting voor het compenseren van echosignalen.
JPS583430A (ja) * 1981-06-30 1983-01-10 Nec Corp まわり込信号抑圧装置
GB2123258A (en) * 1982-06-25 1984-01-25 Philips Electronic Associated Digital duplex communication system
US4600815A (en) * 1982-07-30 1986-07-15 Communications Satellite Corporation Automatic gain control for echo cancellers and similar adaptive systems
DE3228786A1 (de) * 1982-08-02 1984-02-09 Siemens AG, 1000 Berlin und 8000 München Verfahren zur darstellung der koeffizienten eines echokompensators
JPS5961321A (ja) * 1982-09-30 1984-04-07 Nec Corp エコ−信号抑圧装置
US4621356A (en) * 1983-07-18 1986-11-04 Scipione Fred J Communications interface for duplex transmission and reception of data and other signals over telephone lines
GB2144950A (en) * 1983-08-10 1985-03-13 Philips Electronic Associated Data transmission system
US4692909A (en) * 1984-06-29 1987-09-08 Amoco Corporation Adaptive seismic signal processor
US4628157A (en) * 1984-09-07 1986-12-09 At&T Bell Laboratories Bidirectional adaptive voice frequency repeater
US4811342A (en) * 1985-11-12 1989-03-07 Racal Data Communications Inc. High speed analog echo canceller
DE3609090A1 (de) * 1986-03-18 1987-09-24 Gao Ges Automation Org Wertpapier mit darin eingelagertem sicherheitsfaden und verfahren zur herstellung derselben
US4888762A (en) * 1987-02-17 1989-12-19 Nec Corporation Echo canceller for bidirectional transmission on two-wire subscriber lines
US4989221A (en) * 1987-03-30 1991-01-29 Codex Corporation Sample rate converter
DE3804332C2 (de) * 1988-02-12 1996-02-29 Ant Nachrichtentech Schaltungsanordnung zum Übergang von Vierdrahtbetrieb auf Zweidrahtbetrieb in der elektrischen Nachrichtentechnik
FR2629293A1 (fr) * 1988-03-25 1989-09-29 Trt Telecom Radio Electr Annuleur d'echo pour signal d'echo a phase variable
US5353348A (en) * 1993-05-14 1994-10-04 Jrc International, Inc. Double echo cancelling system
US5825754A (en) * 1995-12-28 1998-10-20 Vtel Corporation Filter and process for reducing noise in audio signals
US7280060B1 (en) 2000-05-23 2007-10-09 Marvell International Ltd. Communication driver
US7113121B1 (en) 2000-05-23 2006-09-26 Marvell International Ltd. Communication driver
US6462688B1 (en) 2000-12-18 2002-10-08 Marvell International, Ltd. Direct drive programmable high speed power digital-to-analog converter
US7312739B1 (en) 2000-05-23 2007-12-25 Marvell International Ltd. Communication driver
US7095348B1 (en) 2000-05-23 2006-08-22 Marvell International Ltd. Communication driver
US6775529B1 (en) 2000-07-31 2004-08-10 Marvell International Ltd. Active resistive summer for a transformer hybrid
US7433665B1 (en) 2000-07-31 2008-10-07 Marvell International Ltd. Apparatus and method for converting single-ended signals to a differential signal, and transceiver employing same
US7194037B1 (en) * 2000-05-23 2007-03-20 Marvell International Ltd. Active replica transformer hybrid
USRE41831E1 (en) 2000-05-23 2010-10-19 Marvell International Ltd. Class B driver
US7606547B1 (en) 2000-07-31 2009-10-20 Marvell International Ltd. Active resistance summer for a transformer hybrid
US7298173B1 (en) 2004-10-26 2007-11-20 Marvell International Ltd. Slew rate control circuit for small computer system interface (SCSI) differential driver
US7312662B1 (en) 2005-08-09 2007-12-25 Marvell International Ltd. Cascode gain boosting system and method for a transmitter
US7577892B1 (en) 2005-08-25 2009-08-18 Marvell International Ltd High speed iterative decoder

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3499999A (en) * 1966-10-31 1970-03-10 Bell Telephone Labor Inc Closed loop adaptive echo canceller using generalized filter networks
US3508017A (en) * 1967-12-08 1970-04-21 Bell Telephone Labor Inc Adaptive echo canceller with an output filter
US3560669A (en) * 1969-02-25 1971-02-02 Wescom Echo suppressor
FR2138340B1 (fr) * 1971-05-24 1973-05-25 Trt Telecom Radio Electr
US3836734A (en) * 1971-12-03 1974-09-17 Communications Satellite Corp Adaptive echo canceller with multi-increment gain coefficient corrections
NL7800408A (nl) * 1977-01-17 1978-07-19 Trt Telecom Radio Electr Digitale echocompensator voor een modem voor datatransmissie met behulp van modulatie van een draaggolf.

Also Published As

Publication number Publication date
GB2050127A (en) 1980-12-31
US4362909A (en) 1982-12-07
JPH0139257B2 (fr) 1989-08-18
NL7903759A (nl) 1980-11-18
AU537041B2 (en) 1984-05-31
FR2457042B1 (fr) 1984-10-19
CA1152595A (fr) 1983-08-23
DE3018238C2 (de) 1986-03-20
SE8003539L (sv) 1980-11-15
IT8021965A0 (it) 1980-05-09
AU5833180A (en) 1980-11-20
GB2050127B (en) 1983-05-18
JPS55153435A (en) 1980-11-29
IT1130590B (it) 1986-06-18
SE446241B (sv) 1986-08-18
DE3018238A1 (de) 1980-11-20

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