CA1152594A - Echo canceler for homochronous data transmission systems - Google Patents

Echo canceler for homochronous data transmission systems

Info

Publication number
CA1152594A
CA1152594A CA000347104A CA347104A CA1152594A CA 1152594 A CA1152594 A CA 1152594A CA 000347104 A CA000347104 A CA 000347104A CA 347104 A CA347104 A CA 347104A CA 1152594 A CA1152594 A CA 1152594A
Authority
CA
Canada
Prior art keywords
signal
echo
residual
processing arrangement
signals
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
Application number
CA000347104A
Other languages
English (en)
French (fr)
Inventor
Wilfred A. M. Snijders
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
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of CA1152594A publication Critical patent/CA1152594A/en
Expired 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)
  • Bidirectional Digital Transmission (AREA)
CA000347104A 1979-03-15 1980-03-06 Echo canceler for homochronous data transmission systems Expired CA1152594A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL7902053A NL7902053A (nl) 1979-03-15 1979-03-15 Echocompensator voor homochrone data overdrachtssyste- men.
NL7902053 1979-03-15

Publications (1)

Publication Number Publication Date
CA1152594A true CA1152594A (en) 1983-08-23

Family

ID=19832807

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000347104A Expired CA1152594A (en) 1979-03-15 1980-03-06 Echo canceler for homochronous data transmission systems

Country Status (10)

Country Link
US (1) US4334128A (https=)
JP (1) JPS55125734A (https=)
AU (1) AU529759B2 (https=)
CA (1) CA1152594A (https=)
DE (1) DE3009450A1 (https=)
FR (1) FR2451677B1 (https=)
GB (1) GB2045585B (https=)
IT (1) IT1129647B (https=)
NL (1) NL7902053A (https=)
SE (2) SE8001920L (https=)

Families Citing this family (18)

* 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
JPS6046899B2 (ja) * 1980-09-26 1985-10-18 日本電気株式会社 反響消去装置
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.
DE3118473C2 (de) 1981-05-09 1987-02-05 Felten & Guilleaume Fernmeldeanlagen GmbH, 8500 Nürnberg Verfahren zur Aufbereitung elektrischer Signale mit einer digitalen Filteranordnung
FR2528643A1 (fr) * 1982-06-14 1983-12-16 Trt Telecom Radio Electr Procede destine a reduire le temps de convergence d'un annuleur d'echo et dispositif utilise pour mettre en oeuvre ce procede
FR2534427A1 (fr) * 1982-10-11 1984-04-13 Trt Telecom Radio Electr Annuleur d'echo pour signal de donnees en bande de base
US4621172A (en) * 1982-12-22 1986-11-04 Nec Corporation Fast convergence method and system for echo canceller
US4562312A (en) * 1983-02-17 1985-12-31 At&T Bell Laboratories Subsampling delay estimator for an echo canceler
FR2546693B1 (fr) * 1983-05-26 1985-08-30 Centre Nat Rech Scient Annuleur d'echo a filtre numerique adaptatif pour systeme de transmission
US4707824A (en) * 1983-12-15 1987-11-17 Nec Corporation Method and apparatus for cancelling echo
NZ214905A (en) * 1985-01-29 1988-09-29 British Telecomm Noise cancellation by adaptive filter compensates for timing variations
JPS62171329A (ja) * 1986-01-24 1987-07-28 Nec Corp エコ−消去方式
WO1991018453A1 (en) * 1989-05-12 1991-11-28 Plessey Semiconductors Limited Audio signal processor circuit
CA2073082C (en) * 1991-07-08 1997-09-09 Takanori Iwamatsu Fractionally spaced cross-polarization interference canceller
US5204854A (en) * 1991-08-23 1993-04-20 Sierra Semiconductor Corporation Adaptive hybrid
FI104134B1 (fi) * 1997-07-31 1999-11-15 Nokia Networks Oy Datan- ja virransyötön toteuttava kaapeliliitäntä
DE19937505C2 (de) * 1999-08-09 2001-07-26 Infineon Technologies Ag Empfangsverfahren und Empfängeranordnung für ein Duplex-Übertragungssystem

Family Cites Families (5)

* 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
US3789165A (en) * 1972-04-24 1974-01-29 Communications Satellite Corp Echo canceller with variable threshold
FR2272544B1 (https=) * 1974-05-24 1977-03-11 Cit Alcatel
NL170688C (nl) * 1976-06-28 1982-12-01 Philips Nv Inrichting voor simultane tweerichtingsdatatransmissie over tweedraadsverbindingen.
US4129753A (en) * 1977-12-09 1978-12-12 Bell Telephone Laboratories, Incorporated Echo canceller using feedback to improve speech detector performance

Also Published As

Publication number Publication date
JPS55125734A (en) 1980-09-27
NL7902053A (nl) 1980-09-17
SE453551B (sv) 1988-02-08
SE8001920L (sv) 1980-09-16
FR2451677B1 (fr) 1987-04-17
AU529759B2 (en) 1983-06-16
JPS644382B2 (https=) 1989-01-25
AU5644180A (en) 1980-09-18
DE3009450A1 (de) 1980-09-25
IT8020554A0 (it) 1980-03-12
GB2045585B (en) 1983-11-16
GB2045585A (en) 1980-10-29
FR2451677A1 (fr) 1980-10-10
US4334128A (en) 1982-06-08
IT1129647B (it) 1986-06-11

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Legal Events

Date Code Title Description
MKEX Expiry