DE68924261T2 - Echokompensationseinrichtung mit Anpassung der Echokompensationskoeffizienten während der Vollduplexübertragung. - Google Patents

Echokompensationseinrichtung mit Anpassung der Echokompensationskoeffizienten während der Vollduplexübertragung.

Info

Publication number
DE68924261T2
DE68924261T2 DE68924261T DE68924261T DE68924261T2 DE 68924261 T2 DE68924261 T2 DE 68924261T2 DE 68924261 T DE68924261 T DE 68924261T DE 68924261 T DE68924261 T DE 68924261T DE 68924261 T2 DE68924261 T2 DE 68924261T2
Authority
DE
Germany
Prior art keywords
echo cancellation
adaptation
full duplex
during full
duplex transmission
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 - Fee Related
Application number
DE68924261T
Other languages
English (en)
Other versions
DE68924261D1 (de
Inventor
Gottfried Dr Ungerboeck
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Application granted granted Critical
Publication of DE68924261D1 publication Critical patent/DE68924261D1/de
Publication of DE68924261T2 publication Critical patent/DE68924261T2/de
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
    • 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
    • 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
    • H04B3/237—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 using two adaptive filters, e.g. for near end and for end echo cancelling
    • 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
    • H04B3/238—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 using initial training sequence

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
DE68924261T 1989-06-22 1989-06-22 Echokompensationseinrichtung mit Anpassung der Echokompensationskoeffizienten während der Vollduplexübertragung. Expired - Fee Related DE68924261T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP89480101A EP0403716B1 (de) 1989-06-22 1989-06-22 Echokompensationseinrichtung mit Anpassung der Echokompensationskoeffizienten während der Vollduplexübertragung

Publications (2)

Publication Number Publication Date
DE68924261D1 DE68924261D1 (de) 1995-10-19
DE68924261T2 true DE68924261T2 (de) 1996-03-21

Family

ID=8203062

Family Applications (1)

Application Number Title Priority Date Filing Date
DE68924261T Expired - Fee Related DE68924261T2 (de) 1989-06-22 1989-06-22 Echokompensationseinrichtung mit Anpassung der Echokompensationskoeffizienten während der Vollduplexübertragung.

Country Status (4)

Country Link
US (1) US5132963A (de)
EP (1) EP0403716B1 (de)
JP (1) JPH0332233A (de)
DE (1) DE68924261T2 (de)

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5319636A (en) * 1991-11-14 1994-06-07 Codex Corporation Device and method for linear listener echo cancellation
IT1254819B (it) * 1992-02-24 1995-10-11 Sits Soc It Telecom Siemens Procedimento e dispositivo per la cancellazione numerica adattativa dell'eco generato in collegamenti telefonici non stazionari
US5528634A (en) * 1993-11-18 1996-06-18 Motorola, Inc. Trajectory directed timing recovery
US5859907A (en) * 1994-05-06 1999-01-12 Ntt Mobile Communications Network, Inc. Echo canceler and echo path estimating method
CN1558563B (zh) * 1994-05-07 2011-04-20 株式会社Ntt都科摩 回波消除器及其所使用的学习方法
FI97836C (fi) * 1994-10-31 1997-02-25 Nokia Telecommunications Oy Menetelmä tietoliikenneyhteyden muodostamiseksi
US5631957A (en) * 1995-03-09 1997-05-20 National Semiconductor Corporation Band-energy near-end echo reducer for tonal signalling detectors
US5761638A (en) * 1995-03-17 1998-06-02 Us West Inc Telephone network apparatus and method using echo delay and attenuation
US5625646A (en) * 1995-06-26 1997-04-29 Motorola, Inc. Method, device, DSP and modem for efficient echo canceler phase roll tracking
US5809463A (en) * 1995-09-15 1998-09-15 Hughes Electronics Method of detecting double talk in an echo canceller
US5764753A (en) * 1995-09-29 1998-06-09 Crystal Semiconductor Corp. Half-duplex controller
US5631900A (en) * 1995-09-29 1997-05-20 Crystal Semiconductor Double-Talk detector for echo canceller
US5963638A (en) 1996-09-04 1999-10-05 Teltrend, Inc. Adjustable hybrid having improved biasing configuration
US6111949A (en) * 1996-09-04 2000-08-29 Teltrend, Inc. Method of rapid automatic hybrid balancing
US5953412A (en) * 1996-09-04 1999-09-14 Teltrend, Inc. Method and apparatus for controlling line conditioner equalizer
US5974137A (en) * 1996-09-04 1999-10-26 Teltrend, Inc. AGC amplifier for two-wire line conditioner
US5790658A (en) * 1996-10-28 1998-08-04 Advanced Micro Devices, Inc. High performance echo canceller for high speed modem
US6212228B1 (en) * 1997-09-10 2001-04-03 Nortel Networks Limited Apparatus for modulation and demodulating digital data
CN1247664A (zh) * 1997-12-12 2000-03-15 摩托罗拉公司 通信系统中回音抵消器的自适应装置和方法
DE19757337C1 (de) 1997-12-22 1999-06-24 Siemens Ag Echokompensatoranordnung
US6240128B1 (en) 1998-06-11 2001-05-29 Agere Systems Guardian Corp. Enhanced echo canceler
US6324170B1 (en) * 1998-09-10 2001-11-27 Nortel Networks Limited Echo controller with compensation for variable delay networks
US6510190B1 (en) * 1998-12-17 2003-01-21 Nortel Networks Limited Method and apparatus for estimating fading distortion of a signal propagating in a communication channel
US7065473B2 (en) * 1999-08-27 2006-06-20 William K. Warburton Method and apparatus for improving resolution in spectrometers processing output steps from non-ideal signal sources
US6587814B1 (en) * 1999-08-27 2003-07-01 William K. Warburton Method and apparatus for improving resolution in spectrometers processing output steps from non-ideal signal sources
US7164659B2 (en) * 1999-12-09 2007-01-16 Broadcom Corporation Adaptive gain control based on echo canceller performance information
US7796544B2 (en) * 2002-06-07 2010-09-14 Tokyo Electron Limited Method and system for providing an analog front end for multiline transmission in communication systems
US7346012B2 (en) * 2002-12-13 2008-03-18 Tioga Technologies Ltd. Transceiver with accelerated echo canceller convergence
EP2112770B1 (de) * 2008-04-24 2011-10-26 Alcatel Lucent Verfahren und Hybridschaltung zur Nahnebensprechdämpfung in bidirektionaler Signalübertragung

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5829012B2 (ja) * 1978-05-16 1983-06-20 ケイディディ株式会社 エコ−制御方式
CA1175521A (en) * 1980-04-09 1984-10-02 David D. Falconer 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
US4970715A (en) * 1987-03-27 1990-11-13 Universal Data Systems, Inc. Modem with improved remote echo location and cancellation
DE3783605T2 (de) * 1987-04-22 1993-07-15 Ibm Echokompensationseinrichtung fuer datenuebertragung ueber eine zweidrahtleitung.
EP0287743B1 (de) * 1987-04-22 1993-03-03 International Business Machines Corporation Echokompensationseinrichtung mit Korrektur von Phasenabweichungen
JPH01131958A (ja) * 1987-11-18 1989-05-24 Hitachi Ltd 補間方式
US4987569A (en) * 1989-04-05 1991-01-22 Codex Corporation Fast training echo canceller
JPH0321122A (ja) * 1989-06-19 1991-01-29 Oki Electric Ind Co Ltd 全２重モデム用エコーキャンセラ回路

Also Published As

Publication number Publication date
JPH0332233A (ja) 1991-02-12
EP0403716A1 (de) 1990-12-27
DE68924261D1 (de) 1995-10-19
EP0403716B1 (de) 1995-09-13
US5132963A (en) 1992-07-21

Similar Documents

Publication Publication Date Title
DE68924261T2 (de) Echokompensationseinrichtung mit Anpassung der Echokompensationskoeffizienten während der Vollduplexübertragung.
DE69110700D1 (de) Akustischer Teilband-Echokompensator.
NO823856L (no) Ekkokanselleringskrets.
DE69114999T2 (de) Echokompensator mit verbessertem Gegensprechdetektor.
DE69328161D1 (de) Echokompensator mit adaptiver Restechounterdrückung
EP0627840A3 (de) Echokompensator.
AU570635B2 (en) Echo cancellation
FR2460075B1 (fr) Annuleur d'echo adaptatif pour transmission de donnees en duplex
DE69114357T2 (de) Ultraschallwandler mit verringerter gegenseitiger Beeinflussung.
DE69412290T2 (de) Bestimmung der echodämpfung einer echokompensationseinrichtung
AU565362B2 (en) Echo canceller
AU561776B2 (en) Echo cancellation delay measurement
DE69022641D1 (de) Adaptiver Echokompensator.
BE857442A (fr) Annuleur d'echo adaptatif
JPS5757042A (en) Echo cancelling device
GB2075313B (en) Echo cancellers
AU545886B2 (en) Echo canceller
JPS57124945A (en) Echo canceller
PT88218A (pt) Echo canceller
DE69225268T2 (de) Endgerät für Vollduplexdatenübertragung mit Echokompensator
GB2177574B (en) Echo cancellation between modems
JPS5783936A (en) Echo cancelling device
AU6790581A (en) Electro-acoustic transducer with resonanc attenuation means
DE3887057D1 (de) Adaptiver Echokompensator mit Doppel-Spracherkennung.
FR2495410B1 (fr) Annuleur d'echo

Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee