ES8308460A1 - Un metodo de anulacion de un denominado eco de oyente en un sistema para recibir nolmalmente una onda modulada en cuadratura de doble banda lateral. - Google Patents

Un metodo de anulacion de un denominado eco de oyente en un sistema para recibir nolmalmente una onda modulada en cuadratura de doble banda lateral.

Info

Publication number
ES8308460A1
ES8308460A1 ES514206A ES514206A ES8308460A1 ES 8308460 A1 ES8308460 A1 ES 8308460A1 ES 514206 A ES514206 A ES 514206A ES 514206 A ES514206 A ES 514206A ES 8308460 A1 ES8308460 A1 ES 8308460A1
Authority
ES
Spain
Prior art keywords
symbols
echo canceller
listener echo
receiving apparatus
data receiving
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
ES514206A
Other languages
English (en)
Other versions
ES514206A0 (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.)
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
Publication of ES8308460A1 publication Critical patent/ES8308460A1/es
Publication of ES514206A0 publication Critical patent/ES514206A0/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
    • H04B3/235—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 combined with adaptive equaliser

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Bidirectional Digital Transmission (AREA)

Abstract

PROCEDIMIENTO SUPRESOR DE ECO DE OYENTE. EL PROCEDIMIENTO OPERA EN LA RECEPCION DE SIMBOLOS DE DATOS TRANSMITIDOS A INTERVALOS DE TIEMPO REGULARES. LA ONDA RECIBIDA ES DECODIFICADA CONVENCIONALMENTE EN PRIMER LUGAR, PARA REDUCIR DE ELLA LOS SIMBOLOS RECIBIDOS. DICHOS SIMBOLOS SON SOMETIDOS LUEGO A UN RETARDO GLOBAL PREDETERMINADO PARA DESPLAZAR LA RESPUESTA IMPULSIONAL DE ECO DE OYENTE HACIA EL ORIGEN DE REFERENCIA DE TIEMPOS. LOS SIMBOLOS RETARDADOS SON TRATADOS ENTONCES PARA GENERAR UNA REPLICA DE ECO, QUE ES REALIMENTADA A LA ENTRADA DEL DECODIFICADOR PARA SER RESTADA DE SU SEÑAL.
ES514206A 1981-09-08 1982-07-21 Un metodo de anulacion de un denominado eco de oyente en un sistema para recibir nolmalmente una onda modulada en cuadratura de doble banda lateral. Granted ES514206A0 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP81430028A EP0073869B1 (fr) 1981-09-08 1981-09-08 Dispositif de réception de données avec suppresseur d'écho d'écoute

Publications (2)

Publication Number Publication Date
ES8308460A1 true ES8308460A1 (es) 1983-08-16
ES514206A0 ES514206A0 (es) 1983-08-16

Family

ID=8188596

Family Applications (1)

Application Number Title Priority Date Filing Date
ES514206A Granted ES514206A0 (es) 1981-09-08 1982-07-21 Un metodo de anulacion de un denominado eco de oyente en un sistema para recibir nolmalmente una onda modulada en cuadratura de doble banda lateral.

Country Status (5)

Country Link
US (1) US4613731A (es)
EP (1) EP0073869B1 (es)
JP (1) JPS5848539A (es)
DE (1) DE3173306D1 (es)
ES (1) ES514206A0 (es)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4660163A (en) * 1983-01-17 1987-04-21 OKI Electric Co. Ltd Adaptive digital filter
FR2546693B1 (fr) * 1983-05-26 1985-08-30 Centre Nat Rech Scient Annuleur d'echo a filtre numerique adaptatif pour systeme de transmission
NZ214905A (en) * 1985-01-29 1988-09-29 British Telecomm Noise cancellation by adaptive filter compensates for timing variations
EP0221221B1 (en) * 1985-10-30 1991-12-27 International Business Machines Corporation A process for determining an echo path flat delay and echo canceler using said process
US4742510A (en) * 1986-04-04 1988-05-03 Massachusetts Institute Of Technology Near and far echo canceller for data communications
US4970715A (en) * 1987-03-27 1990-11-13 Universal Data Systems, Inc. Modem with improved remote echo location and cancellation
US4813073A (en) * 1987-07-02 1989-03-14 Codex Corporation Echo cancellation
US4995030A (en) * 1988-02-01 1991-02-19 Memotec Datacom, Inc. Far end echo cancellation method and apparatus
GB2234411A (en) * 1989-07-03 1991-01-30 Marconi Instruments Ltd Integrated circuit for digital demodulation
US5319636A (en) * 1991-11-14 1994-06-07 Codex Corporation Device and method for linear listener echo cancellation
DE4421853A1 (de) * 1994-06-22 1996-01-04 Philips Patentverwaltung Mobilfunkendgerät
US5680451A (en) * 1995-11-14 1997-10-21 Paradyne Corporation Listener echo cancellation for modems
US5682378A (en) * 1995-11-14 1997-10-28 Paradyne Corporation Echo cancellation for modems
US6310864B1 (en) 1997-06-19 2001-10-30 Paradyne Corporation Voice echo cancellation for SVD modems
CN102127913B (zh) * 2011-05-04 2012-01-25 江苏建华管桩有限公司 一种混凝土桩与承台的连接方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3721777A (en) * 1971-11-26 1973-03-20 Bell Telephone Labor Inc Echo path delay simulator for use with adaptive echo cancellers
US3906231A (en) * 1974-03-19 1975-09-16 Nasa Doped Josephson tunneling junction for use in a sensitive IR detector
FR2277470A1 (fr) * 1974-07-03 1976-01-30 Cit Alcatel Dispositif de centrage d'un filtre transversal d'un annuleur d'echo
US3962637A (en) * 1974-11-11 1976-06-08 Hycom Incorporated Ultrafast adaptive digital modem
FR2296322A1 (fr) * 1974-12-27 1976-07-23 Ibm France Systeme de detection de donnees numeriques transmises par modulation d'une porteuse
US3947768A (en) * 1975-01-08 1976-03-30 International Business Machines Corporation Carrier-modulation data transmission equalizers
FR2336005A1 (fr) * 1975-12-18 1977-07-15 Ibm France Filtre numerique auto-adaptatif
DE3002995C2 (de) * 1979-02-13 1983-09-29 Nippon Telegraph & Telephone Public Corp., Tokyo Anpassbares Entzerrungssystem
FR2454732A1 (fr) * 1979-04-17 1980-11-14 Ibm France Procede et dispositif pour initialiser un egaliseur adaptatif a partir d'un signal de donnees inconnu dans un systeme de transmission utilisant une modulation a double bande laterale-porteuses en quadrature
US4243935A (en) * 1979-05-18 1981-01-06 The United States Of America As Represented By The Secretary Of The Navy Adaptive detector

Also Published As

Publication number Publication date
JPS5848539A (ja) 1983-03-22
EP0073869B1 (fr) 1985-12-27
DE3173306D1 (en) 1986-02-06
US4613731A (en) 1986-09-23
JPS648499B2 (es) 1989-02-14
EP0073869A1 (fr) 1983-03-16
ES514206A0 (es) 1983-08-16

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19980401