ES8308178A1 - Un filtro de equilibrio del tipo de respuesta de impulsos finitos, destinado a utilizarse en un sistema de telecomunicacion. - Google Patents

Un filtro de equilibrio del tipo de respuesta de impulsos finitos, destinado a utilizarse en un sistema de telecomunicacion.

Info

Publication number
ES8308178A1
ES8308178A1 ES516966A ES516966A ES8308178A1 ES 8308178 A1 ES8308178 A1 ES 8308178A1 ES 516966 A ES516966 A ES 516966A ES 516966 A ES516966 A ES 516966A ES 8308178 A1 ES8308178 A1 ES 8308178A1
Authority
ES
Spain
Prior art keywords
filter
group
memory
transmitter
links
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
ES516966A
Other languages
English (en)
Other versions
ES516966A0 (es
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of ES8308178A1 publication Critical patent/ES8308178A1/es
Publication of ES516966A0 publication Critical patent/ES516966A0/es
Granted 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
    • H04B3/231—Echo cancellers using readout of a memory to provide the echo replica
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • H03H17/06—Non-recursive filters
    • 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)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Mathematical Physics (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Circuits Of Receivers In General (AREA)
  • Selective Calling Equipment (AREA)

Abstract

FILTRO DE EQUILIBRIO DEL TIPO DE RESPUESTA DE IMPULSOS FINITOS, DESTINADO A SER UTILIZADO EN UN SISTEMA DE TELECOMUNICACION. CONSTA DE UNA PLURALIDAD DE ENLACES DE RETARDO INCLUIDOS EN LA UNIDAD TRANSMISOR-RECEPTOR DEL SISTEMA DE TELECOMUNICACION, EN EL QUE LA INFORMACION DIGITAL SE TRANSMITE ES DUPLEX SOBRE UN UNICO PAR DE CONDUCTORES; DE UNA UNIDAD DE CORRECCION DE LOS PARAMETROS DEL FILTRO (CJ); DE UNA UNIDAD DE ACCESO DE MEMORIA (AE1) QUE ESTA CONECTADA A LOS ENLACES DE RETARDO DEL FILTRO; DE UNA MEMORIA DE COEFICIENTE (M1) CONECTADA A LA UNIDAD DE ACCESO (AE1); DE UNA SEGUNDA UNIDAD DE ACCESO (AE2) DE MEMORIA QUE ESTA TAMBIEN CONECTADA A LOS ENLACES DE RETARDO DEL FILTRO; Y DE UNA SEGUNDA MEMORIA DE COEFICIENTE (M2) CONECTADA A LA SEGUNDA UNIDAD DE ACCESO (AE2).
ES516966A 1981-11-02 1982-10-29 Un filtro de equilibrio del tipo de respuesta de impulsos finitos, destinado a utilizarse en un sistema de telecomunicacion. Granted ES516966A0 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8106445A SE426765B (sv) 1981-11-02 1981-11-02 Balansfilter av fir-typ ingaende i sendar-mottagarenheten i ett telekommunikationssystem

Publications (2)

Publication Number Publication Date
ES8308178A1 true ES8308178A1 (es) 1983-08-01
ES516966A0 ES516966A0 (es) 1983-08-01

Family

ID=20344931

Family Applications (1)

Application Number Title Priority Date Filing Date
ES516966A Granted ES516966A0 (es) 1981-11-02 1982-10-29 Un filtro de equilibrio del tipo de respuesta de impulsos finitos, destinado a utilizarse en un sistema de telecomunicacion.

Country Status (18)

Country Link
US (1) US4571719A (es)
EP (1) EP0092569B1 (es)
JP (1) JPS58501849A (es)
KR (1) KR870000629B1 (es)
AU (1) AU553371B2 (es)
BR (1) BR8207952A (es)
DE (1) DE3261072D1 (es)
DK (1) DK301783A (es)
ES (1) ES516966A0 (es)
FI (1) FI73104C (es)
IE (1) IE53760B1 (es)
IT (1) IT1153339B (es)
MX (1) MX152128A (es)
MY (1) MY100485A (es)
NO (1) NO157239C (es)
SE (1) SE426765B (es)
WO (1) WO1983001715A1 (es)
YU (1) YU244382A (es)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1186764A (en) * 1982-06-23 1985-05-07 Akira Kanemasa Echo canceler
US4669116A (en) * 1982-12-09 1987-05-26 Regents Of The University Of California Non-linear echo cancellation of data signals
IT1208769B (it) * 1983-10-12 1989-07-10 Cselt Centro Studi Lab Telecom Teristiche varianti nel tempo procedimento e dispositivo per la cancellazione numerica dell eco generato in collegamenti con carat
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.
US4868874A (en) * 1986-04-18 1989-09-19 Hitachi, Ltd. Echo canceller
EP0255554B1 (de) * 1986-08-07 1991-05-08 Deutsche ITT Industries GmbH Nichtrekursives Digitalfilter
EP0280898A1 (de) * 1987-02-18 1988-09-07 Siemens Aktiengesellschaft Schaltungsanordnung zum Unterdrücken von Echosignalen
JP2581763B2 (ja) * 1988-06-15 1997-02-12 株式会社日立製作所 エコーキャンセラ
CA1315356C (en) * 1988-07-20 1993-03-30 Seiji Miyoshi Digital adaptive filter and method of convergence therein
CA2004379C (en) * 1988-12-01 1993-07-06 Tetsu Taguchi Echo canceller with means for determining filter coefficients from autocorrelation and cross-correlation coefficients
US4982428A (en) * 1988-12-29 1991-01-01 At&T Bell Laboratories Arrangement for canceling interference in transmission systems
DE19645054C2 (de) * 1996-10-31 1999-11-25 Sgs Thomson Microelectronics Vorrichtung und Verfahren zur Selektion von Adressenwörtern
US8718474B2 (en) * 2011-05-27 2014-05-06 Nec Laboratories America, Inc. Chromatic dispersion compensation using sign operations and lookup tables

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2277470A1 (fr) * 1974-07-03 1976-01-30 Cit Alcatel Dispositif de centrage d'un filtre transversal d'un annuleur d'echo
NL170688C (nl) * 1976-06-28 1982-12-01 Philips Nv Inrichting voor simultane tweerichtingsdatatransmissie over tweedraadsverbindingen.
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.
DE2729109A1 (de) * 1977-06-28 1979-01-11 Siemens Ag Schaltungsanordnung zur kompensation von echos in nichtsynchronen traegerfrequenzsystemen
JPS54157407A (en) * 1978-06-02 1979-12-12 Hitachi Ltd Level control unit for time-division exchange
US4268727A (en) * 1979-03-14 1981-05-19 International Telephone And Telegraph Corporation Adaptive digital echo cancellation circuit
FR2479617A1 (fr) * 1980-03-26 1981-10-02 Trt Telecom Radio Electr Annuleur d'echo pour signal d'echo a phase variable
US4425483A (en) * 1981-10-13 1984-01-10 Northern Telecom Limited Echo cancellation using transversal filters

Also Published As

Publication number Publication date
IE53760B1 (en) 1989-02-01
IT1153339B (it) 1987-01-14
EP0092569B1 (en) 1984-10-24
US4571719A (en) 1986-02-18
FI832229A0 (fi) 1983-06-17
NO832421L (no) 1983-07-01
NO157239B (no) 1987-11-02
JPS58501849A (ja) 1983-10-27
DK301783D0 (da) 1983-06-30
BR8207952A (pt) 1983-10-04
NO157239C (no) 1988-02-10
FI73104C (sv) 1987-08-10
DE3261072D1 (en) 1984-11-29
YU244382A (en) 1985-03-20
MY100485A (en) 1985-12-31
DK301783A (da) 1983-06-30
MX152128A (es) 1985-05-30
SE426765B (sv) 1983-02-07
WO1983001715A1 (en) 1983-05-11
AU9122182A (en) 1983-05-18
IT8224026A0 (it) 1982-11-02
KR870000629B1 (ko) 1987-03-26
AU553371B2 (en) 1986-07-10
KR840002599A (ko) 1984-07-02
EP0092569A1 (en) 1983-11-02
FI73104B (fi) 1987-04-30
ES516966A0 (es) 1983-08-01
IE822606L (en) 1983-05-02
FI832229L (fi) 1983-06-17

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