FR2469044A1 - Procede de traitement en temps partage de signaux numeriques et application a un annuleur d'echo autoadaptatif multiplexe - Google Patents

Procede de traitement en temps partage de signaux numeriques et application a un annuleur d'echo autoadaptatif multiplexe

Info

Publication number
FR2469044A1
FR2469044A1 FR7921769A FR7921769A FR2469044A1 FR 2469044 A1 FR2469044 A1 FR 2469044A1 FR 7921769 A FR7921769 A FR 7921769A FR 7921769 A FR7921769 A FR 7921769A FR 2469044 A1 FR2469044 A1 FR 2469044A1
Authority
FR
France
Prior art keywords
application
digital signal
processing method
adaptive echo
signal time
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
FR7921769A
Other languages
English (en)
French (fr)
Other versions
FR2469044B1 (enExample
Inventor
Jean-Pierre Houdard
Philippe Francis Patte
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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Priority to FR7921769A priority Critical patent/FR2469044A1/fr
Publication of FR2469044A1 publication Critical patent/FR2469044A1/fr
Priority to US06/457,942 priority patent/US4507747A/en
Application granted granted Critical
Publication of FR2469044B1 publication Critical patent/FR2469044B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
    • H04L25/03019—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception
    • H04L25/03038—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception with a non-recursive structure
    • 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)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
FR7921769A 1979-08-30 1979-08-30 Procede de traitement en temps partage de signaux numeriques et application a un annuleur d'echo autoadaptatif multiplexe Granted FR2469044A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR7921769A FR2469044A1 (fr) 1979-08-30 1979-08-30 Procede de traitement en temps partage de signaux numeriques et application a un annuleur d'echo autoadaptatif multiplexe
US06/457,942 US4507747A (en) 1979-08-30 1983-01-14 Procedure for shared-time processing of digital signals and application to a multiplexed self-adapting echo canceler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7921769A FR2469044A1 (fr) 1979-08-30 1979-08-30 Procede de traitement en temps partage de signaux numeriques et application a un annuleur d'echo autoadaptatif multiplexe

Publications (2)

Publication Number Publication Date
FR2469044A1 true FR2469044A1 (fr) 1981-05-08
FR2469044B1 FR2469044B1 (enExample) 1984-11-09

Family

ID=9229216

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7921769A Granted FR2469044A1 (fr) 1979-08-30 1979-08-30 Procede de traitement en temps partage de signaux numeriques et application a un annuleur d'echo autoadaptatif multiplexe

Country Status (2)

Country Link
US (1) US4507747A (enExample)
FR (1) FR2469044A1 (enExample)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0048979A3 (en) * 1980-09-26 1983-06-29 Nec Corporation Echo canceller for a long-distance telephone network
FR2526612A1 (fr) * 1982-05-04 1983-11-10 Thomson Csf Mat Tel Dispositif numerique de mesure de niveaux d'energie en particulier pour annuleur d'echo
EP0177239A3 (en) * 1984-10-01 1987-06-03 AT&T Corp. Adaptive filter including signal path compensation

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4731834A (en) * 1984-10-01 1988-03-15 American Telephone And Telegraph Company, At&T Bell Laboratories Adaptive filter including signal path compensation
US4752903A (en) * 1985-03-25 1988-06-21 Hitachi Densi Kabushiki Kaisha Adaptive digital filter for eliminating howling
GB8511835D0 (en) * 1985-05-10 1985-06-19 British Telecomm Adaptive digital filter
FR2666947A1 (fr) * 1990-09-18 1992-03-20 Trt Telecom Radio Electr Dispositif d'egalisation de spectre.
US5663955A (en) * 1995-08-25 1997-09-02 Lucent Technologies Inc. Echo canceller system with shared coefficient memory
US6011783A (en) * 1997-06-11 2000-01-04 Nortel Networks Corporation Method and apparatus for monitoring echo cancellation performance within a telephone communications network
JP2000196507A (ja) * 1998-12-28 2000-07-14 Nec Corp 多重化回線用エコ―除去の方法及び装置
US6795405B1 (en) 1999-12-27 2004-09-21 Telogy Networks, Inc. Digital modem echo canceler enhancement
US7016371B1 (en) * 2001-07-24 2006-03-21 Conexant Systems, Inc. Multi-mode adaptive filter
US20060168114A1 (en) * 2004-11-12 2006-07-27 Arnaud Glatron Audio processing system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2215402B1 (de) * 1972-03-29 1973-09-20 Siemens Ag, 1000 Berlin U. 8000 Muenchen Echokompensator fur ein Nachrichten übertragungssystem
FR2272544A1 (enExample) * 1974-05-24 1975-12-19 Cit Alcatel

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3967102A (en) * 1975-03-25 1976-06-29 The United States Of America As Represented By The Secretary Of The Air Force Self-adjusting digital notch filter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2215402B1 (de) * 1972-03-29 1973-09-20 Siemens Ag, 1000 Berlin U. 8000 Muenchen Echokompensator fur ein Nachrichten übertragungssystem
FR2272544A1 (enExample) * 1974-05-24 1975-12-19 Cit Alcatel

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/78 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0048979A3 (en) * 1980-09-26 1983-06-29 Nec Corporation Echo canceller for a long-distance telephone network
FR2526612A1 (fr) * 1982-05-04 1983-11-10 Thomson Csf Mat Tel Dispositif numerique de mesure de niveaux d'energie en particulier pour annuleur d'echo
EP0177239A3 (en) * 1984-10-01 1987-06-03 AT&T Corp. Adaptive filter including signal path compensation

Also Published As

Publication number Publication date
US4507747A (en) 1985-03-26
FR2469044B1 (enExample) 1984-11-09

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Legal Events

Date Code Title Description
ST Notification of lapse