FR2457042A1 - Compensateur d'echo a filtre passe-haut - Google Patents
Compensateur d'echo a filtre passe-hautInfo
- Publication number
- FR2457042A1 FR2457042A1 FR8010459A FR8010459A FR2457042A1 FR 2457042 A1 FR2457042 A1 FR 2457042A1 FR 8010459 A FR8010459 A FR 8010459A FR 8010459 A FR8010459 A FR 8010459A FR 2457042 A1 FR2457042 A1 FR 2457042A1
- Authority
- FR
- France
- Prior art keywords
- signal
- data
- echo
- residual
- digital
- 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.)
- Granted
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)
Abstract
COMPENSATEUR D'ECHO POUR UN SYSTEME DE TRANSFERT DE DONNEES, COMPORTANT DES LIAISONS A DEUX FILS ET A QUATRE FILS. CE COMPENSATEUR D'ECHO EST POURVU D'UN DISPOSITIF DE TRAITEMENT DE SIGNAUX REGLABLE AUQUEL EST AMENE LE SIGNAL DE DONNEES A TRANSFERER ET QUI FOURNIT UN SIGNAL D'ECHO SYNTHETIQUE. DANS LE TRAJET DE RECEPTION DE LA LIAISON A QUATRE FILS EST PRESENT UN SIGNAL QUI EST FORME PAR UN SIGNAL DE DONNEES RECU ET UN SIGNAL D'ECHO. LE SIGNAL D'ECHO SYNTHETIQUE EST SOUSTRAIT DES SIGNAUX PRESENTS DANS LE TRAJET DE RECEPTION, POUR PRODUIRE UN SIGNAL RESIDUEL. POUR LE REGLAGE DU DISPOSITIF DE TRAITEMENT DE SIGNAUX, UN DISPOSITIF DE REGLAGE AUQUEL UN SIGNAL DE COMMANDE NUMERIQUE EST AMENE Y EST CONNECTE, CE SIGNAL NUMERIQUE ETANT FORME PAR UNE VERSION NUMERIQUE DU SIGNAL RESIDUEL. AFIN D'AMELIORER LA QUALITE DU SIGNAL RESIDUEL QUI EST OBTENU AU CAS OU LE SIGNAL DE DONNEES CONTIENT DES LONGUES SERIES DE SYMBOLES DE DONNEES D'UN MEME TYPE, LE SIGNAL RESIDUEL EST SOUMIS A UNE OPERATION DE FILTRAGE PASSE-HAUT ET LA VERSION NUMERIQUE DU SIGNAL RESIDUEL AINSI FILTRE EST AMENEE, EN TANT QUE SIGNAL DE COMMANDE, AU DISPOSITIF DE REGLAGE. APPLICATION: TRANSMISSION DE DONNEES.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL7903759A NL7903759A (nl) | 1979-05-14 | 1979-05-14 | Echocompensator met hoogdoorlaatfilter. |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2457042A1 true FR2457042A1 (fr) | 1980-12-12 |
FR2457042B1 FR2457042B1 (fr) | 1984-10-19 |
Family
ID=19833173
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8010459A Granted FR2457042A1 (fr) | 1979-05-14 | 1980-05-09 | Compensateur d'echo a filtre passe-haut |
Country Status (10)
Country | Link |
---|---|
US (1) | US4362909A (fr) |
JP (1) | JPS55153435A (fr) |
AU (1) | AU537041B2 (fr) |
CA (1) | CA1152595A (fr) |
DE (1) | DE3018238C2 (fr) |
FR (1) | FR2457042A1 (fr) |
GB (1) | GB2050127B (fr) |
IT (1) | IT1130590B (fr) |
NL (1) | NL7903759A (fr) |
SE (1) | SE446241B (fr) |
Families Citing this family (33)
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 |
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. |
JPS583430A (ja) * | 1981-06-30 | 1983-01-10 | Nec Corp | まわり込信号抑圧装置 |
GB2123258A (en) * | 1982-06-25 | 1984-01-25 | Philips Electronic Associated | Digital duplex communication system |
US4600815A (en) * | 1982-07-30 | 1986-07-15 | Communications Satellite Corporation | Automatic gain control for echo cancellers and similar adaptive systems |
DE3228786A1 (de) * | 1982-08-02 | 1984-02-09 | Siemens AG, 1000 Berlin und 8000 München | Verfahren zur darstellung der koeffizienten eines echokompensators |
JPS5961321A (ja) * | 1982-09-30 | 1984-04-07 | Nec Corp | エコ−信号抑圧装置 |
US4621356A (en) * | 1983-07-18 | 1986-11-04 | Scipione Fred J | Communications interface for duplex transmission and reception of data and other signals over telephone lines |
GB2144950A (en) * | 1983-08-10 | 1985-03-13 | Philips Electronic Associated | Data transmission system |
US4692909A (en) * | 1984-06-29 | 1987-09-08 | Amoco Corporation | Adaptive seismic signal processor |
US4628157A (en) * | 1984-09-07 | 1986-12-09 | At&T Bell Laboratories | Bidirectional adaptive voice frequency repeater |
US4811342A (en) * | 1985-11-12 | 1989-03-07 | Racal Data Communications Inc. | High speed analog echo canceller |
DE3609090A1 (de) * | 1986-03-18 | 1987-09-24 | Gao Ges Automation Org | Wertpapier mit darin eingelagertem sicherheitsfaden und verfahren zur herstellung derselben |
US4888762A (en) * | 1987-02-17 | 1989-12-19 | Nec Corporation | Echo canceller for bidirectional transmission on two-wire subscriber lines |
US4989221A (en) * | 1987-03-30 | 1991-01-29 | Codex Corporation | Sample rate converter |
DE3804332C2 (de) * | 1988-02-12 | 1996-02-29 | Ant Nachrichtentech | Schaltungsanordnung zum Übergang von Vierdrahtbetrieb auf Zweidrahtbetrieb in der elektrischen Nachrichtentechnik |
FR2629293A1 (fr) * | 1988-03-25 | 1989-09-29 | Trt Telecom Radio Electr | Annuleur d'echo pour signal d'echo a phase variable |
US5353348A (en) * | 1993-05-14 | 1994-10-04 | Jrc International, Inc. | Double echo cancelling system |
US5825754A (en) * | 1995-12-28 | 1998-10-20 | Vtel Corporation | Filter and process for reducing noise in audio signals |
US7095348B1 (en) | 2000-05-23 | 2006-08-22 | Marvell International Ltd. | Communication driver |
US7113121B1 (en) | 2000-05-23 | 2006-09-26 | Marvell International Ltd. | Communication driver |
US7433665B1 (en) | 2000-07-31 | 2008-10-07 | Marvell International Ltd. | Apparatus and method for converting single-ended signals to a differential signal, and transceiver employing same |
US6462688B1 (en) | 2000-12-18 | 2002-10-08 | Marvell International, Ltd. | Direct drive programmable high speed power digital-to-analog converter |
US7194037B1 (en) | 2000-05-23 | 2007-03-20 | Marvell International Ltd. | Active replica transformer hybrid |
US7312739B1 (en) | 2000-05-23 | 2007-12-25 | Marvell International Ltd. | Communication driver |
US7280060B1 (en) | 2000-05-23 | 2007-10-09 | Marvell International Ltd. | Communication driver |
USRE41831E1 (en) | 2000-05-23 | 2010-10-19 | Marvell International Ltd. | Class B driver |
US6775529B1 (en) | 2000-07-31 | 2004-08-10 | Marvell International Ltd. | Active resistive summer for a transformer hybrid |
US7606547B1 (en) | 2000-07-31 | 2009-10-20 | Marvell International Ltd. | Active resistance summer for a transformer hybrid |
US7298173B1 (en) | 2004-10-26 | 2007-11-20 | Marvell International Ltd. | Slew rate control circuit for small computer system interface (SCSI) differential driver |
US7312662B1 (en) | 2005-08-09 | 2007-12-25 | Marvell International Ltd. | Cascode gain boosting system and method for a transmitter |
US7577892B1 (en) | 2005-08-25 | 2009-08-18 | Marvell International Ltd | High speed iterative decoder |
Family Cites Families (6)
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 |
US3508017A (en) * | 1967-12-08 | 1970-04-21 | Bell Telephone Labor Inc | Adaptive echo canceller with an output filter |
US3560669A (en) * | 1969-02-25 | 1971-02-02 | Wescom | Echo suppressor |
FR2138340B1 (fr) * | 1971-05-24 | 1973-05-25 | Trt Telecom Radio Electr | |
US3836734A (en) * | 1971-12-03 | 1974-09-17 | Communications Satellite Corp | Adaptive echo canceller with multi-increment gain coefficient corrections |
IT1091970B (it) * | 1977-01-17 | 1985-07-06 | Trt Telecom Radio Electr | Dispositivo digitale per la cancellazione di echi,per un modulatore/demodulatore,per la trasmissione di dati mediante modulazione di una portante |
-
1979
- 1979-05-14 NL NL7903759A patent/NL7903759A/nl unknown
-
1980
- 1980-04-21 US US06/142,304 patent/US4362909A/en not_active Expired - Lifetime
- 1980-05-02 GB GB8014764A patent/GB2050127B/en not_active Expired
- 1980-05-08 CA CA000351523A patent/CA1152595A/fr not_active Expired
- 1980-05-09 IT IT21965/80A patent/IT1130590B/it active
- 1980-05-09 FR FR8010459A patent/FR2457042A1/fr active Granted
- 1980-05-12 SE SE8003539A patent/SE446241B/sv not_active IP Right Cessation
- 1980-05-12 AU AU58331/80A patent/AU537041B2/en not_active Ceased
- 1980-05-13 DE DE3018238A patent/DE3018238C2/de not_active Expired
- 1980-05-14 JP JP6292980A patent/JPS55153435A/ja active Granted
Also Published As
Publication number | Publication date |
---|---|
JPH0139257B2 (fr) | 1989-08-18 |
US4362909A (en) | 1982-12-07 |
DE3018238C2 (de) | 1986-03-20 |
SE446241B (sv) | 1986-08-18 |
GB2050127B (en) | 1983-05-18 |
AU5833180A (en) | 1980-11-20 |
JPS55153435A (en) | 1980-11-29 |
IT1130590B (it) | 1986-06-18 |
NL7903759A (nl) | 1980-11-18 |
AU537041B2 (en) | 1984-05-31 |
CA1152595A (fr) | 1983-08-23 |
GB2050127A (en) | 1980-12-31 |
FR2457042B1 (fr) | 1984-10-19 |
SE8003539L (sv) | 1980-11-15 |
IT8021965A0 (it) | 1980-05-09 |
DE3018238A1 (de) | 1980-11-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
CD | Change of name or company name |