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ES474858A1 - Acoplador direccional para transmision duplex - Google Patents

Acoplador direccional para transmision duplex

Info

Publication number
ES474858A1
ES474858A1 ES474858A ES474858A ES474858A1 ES 474858 A1 ES474858 A1 ES 474858A1 ES 474858 A ES474858 A ES 474858A ES 474858 A ES474858 A ES 474858A ES 474858 A1 ES474858 A1 ES 474858A1
Authority
ES
Spain
Prior art keywords
transmitter
memory unit
correction signal
signal
values
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
ES474858A
Other languages
English (en)
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.)
ELEKRISK BUREAU AS
Original Assignee
ELEKRISK BUREAU AS
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 ELEKRISK BUREAU AS filed Critical ELEKRISK BUREAU AS
Publication of ES474858A1 publication Critical patent/ES474858A1/es
Expired 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
    • H04B3/231—Echo cancellers using readout of a memory to provide the echo replica

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Analogue/Digital Conversion (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Bidirectional Digital Transmission (AREA)
  • Transceivers (AREA)
  • Dc Digital Transmission (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

Acoplador direccional para transmisión duplex, que comprende un dispositivo para producir una señal de corrección y un circuito de compensación (KK) al que se aplica dicha señal de corrección para la supresión de la porción de la señal recibida que es provocada por la señal procedente del propio transmisor, caracterizado porque el dispositivo comprende una unidad de memoria (HUK) con los valores almacenados de la señal de corrección cuyos valores dentro de un período de tiempo seleccionado, son asignados a las diferentes posibles variantes de las funciones del tiempo procedentes del propio transmisor (S1), y un decodificador (ADR) conectado entre dicho transmisor y la unidad de memoria (HUK) par la detección de las variantes de señal transmitidas reales, cuyo decodificador (ADR) comprende medios para la selección en la unidad de memoria (HUK) de los valores de la señal reales, y porque el circuito de compensación (KK) está conectado a la unidad de memoria (HUK) para la utilización de los valores asignados como señal de corrección.
ES474858A 1977-10-24 1978-10-23 Acoplador direccional para transmision duplex Expired ES474858A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO773627A NO140648C (no) 1977-10-24 1977-10-24 Direktiv kobler.

Publications (1)

Publication Number Publication Date
ES474858A1 true ES474858A1 (es) 1979-03-16

Family

ID=19883789

Family Applications (1)

Application Number Title Priority Date Filing Date
ES474858A Expired ES474858A1 (es) 1977-10-24 1978-10-23 Acoplador direccional para transmision duplex

Country Status (14)

Country Link
US (1) US4237463A (es)
AR (1) AR217116A1 (es)
BR (1) BR7807005A (es)
DE (1) DE2846105C2 (es)
DK (1) DK147564C (es)
ES (1) ES474858A1 (es)
FI (1) FI73552C (es)
GB (1) GB2007946B (es)
GR (1) GR65007B (es)
IN (1) IN149319B (es)
MY (1) MY8300052A (es)
NL (1) NL185968C (es)
NO (1) NO140648C (es)
SE (1) SE441720C (es)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2920575C2 (de) * 1979-05-21 1981-09-17 Siemens AG, 1000 Berlin und 8000 München Digital-Fernmeldesystem mit mindestens einem Vierdrahtleitungsabschnitt
GB2083977B (en) * 1980-08-26 1984-08-22 Standard Telephones Cables Ltd Single channel duplex radio system
IT1144154B (it) * 1981-03-09 1986-10-29 Cselt Centro Studi Lab Telecom Sistema di trasmissione simultanea bidirezionale su linea a due conduttori per telefono numerico
DE3116863C2 (de) * 1981-04-28 1985-08-08 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung zur Digitalsignal-Echokompensation
DE3121545C2 (de) * 1981-05-29 1986-12-04 Siemens AG, 1000 Berlin und 8000 München Übersprech- u./o. Echo-Kompensationsschaltung
GB2123259A (en) * 1982-06-25 1984-01-25 Philips Electronic Associated Digital duplex communication system
GB8427165D0 (en) * 1984-10-26 1984-12-05 British Telecomm Adaptive recognising device
US4638473A (en) * 1984-12-28 1987-01-20 Gte Laboratories Incorporated Two wire bidirectional digital transmission system
NL8600817A (nl) 1986-03-28 1987-10-16 At & T & Philips Telecomm Adaptief filter voor het vormen van een echokompensatiesignaal in een zend-ontvangstelsel voor het in duplexvorm bedrijven van digitale communicatie over een enkel geleiderpaar.
NL8600815A (nl) * 1986-03-28 1987-10-16 At & T & Philips Telecomm Inrichting voor het kompenseren van niet-lineaire vervorming in een te digitaliseren ingangssignaal en een echokompensatiestelsel voorzien van een dergelijke inrichting.
SE453627B (sv) * 1986-06-17 1988-02-15 Ellemtel Utvecklings Ab Anordning for adaptiv ekoeliminering
NO875147L (no) * 1987-05-12 1988-11-14 Elektrisk Bureau As Fremgangsmaate for konvertering av signalnivaaer, samt anordning for utfoerelse av fremgangsmaaten.
GB8719307D0 (en) * 1987-08-14 1987-09-23 Gen Electric Co Plc Echo canceller
US5719856A (en) * 1995-04-07 1998-02-17 Motorola, Inc. Transmitter/receiver interface apparatus and method for a bi-directional transmission path
US5887032A (en) * 1996-09-03 1999-03-23 Amati Communications Corp. Method and apparatus for crosstalk cancellation
US6901070B2 (en) * 2000-12-04 2005-05-31 Gautam Nag Kavipurapu Dynamically programmable integrated switching device using an asymmetric 5T1C cell
US11862194B1 (en) 2022-12-01 2024-01-02 International Business Machines Corporation Adaptive data detection on a nonlinear channel

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3535473A (en) * 1966-10-31 1970-10-20 Bell Telephone Labor Inc Self-adjusting echo canceller
US3566031A (en) * 1968-12-23 1971-02-23 Bell Telephone Labor Inc Direct-current data set arranged for polar signaling and full duplex operation
US3696429A (en) * 1971-05-24 1972-10-03 Cutler Hammer Inc Signal cancellation system
US3821494A (en) * 1972-07-14 1974-06-28 Ibm Digital echo suppressor with direct table look up control by delta coded signals
US4144417A (en) * 1975-03-07 1979-03-13 Kokusai Denshin Denwa Kabushiki Kaisha Echo cancelling system
US4126770A (en) * 1975-11-07 1978-11-21 Kokusai Denshin Denwa Kabushiki Kaisha Echo canceller
US4087654A (en) * 1975-11-28 1978-05-02 Bell Telephone Laboratories, Incorporated Echo canceller for two-wire full duplex data transmission

Also Published As

Publication number Publication date
DK147564C (da) 1989-10-23
GR65007B (en) 1980-06-12
SE441720B (sv) 1985-10-28
NL185968B (nl) 1990-03-16
DE2846105C2 (de) 1985-03-21
IN149319B (es) 1981-10-24
MY8300052A (en) 1983-12-31
NO773627L (no) 1979-04-25
FI73552C (fi) 1987-10-09
GB2007946B (en) 1982-03-24
GB2007946A (en) 1979-05-23
DK147564B (da) 1984-10-01
BR7807005A (pt) 1979-05-08
NO140648C (no) 1983-03-29
DK471078A (da) 1979-04-25
SE441720C (sv) 1987-11-09
AR217116A1 (es) 1980-02-29
FI73552B (fi) 1987-06-30
NL7810554A (nl) 1979-04-26
US4237463A (en) 1980-12-02
DE2846105A1 (de) 1979-04-26
SE7810979L (sv) 1979-04-25
NO140648B (no) 1979-07-02
NL185968C (nl) 1990-08-16
FI783206A7 (fi) 1979-04-25

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19971001