GB2182829B - High speed analog echo canceller - Google Patents

High speed analog echo canceller

Info

Publication number
GB2182829B
GB2182829B GB8626415A GB8626415A GB2182829B GB 2182829 B GB2182829 B GB 2182829B GB 8626415 A GB8626415 A GB 8626415A GB 8626415 A GB8626415 A GB 8626415A GB 2182829 B GB2182829 B GB 2182829B
Authority
GB
United Kingdom
Prior art keywords
high speed
echo canceller
speed analog
analog echo
canceller
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
GB8626415A
Other versions
GB8626415D0 (en
GB2182829A (en
Inventor
Zheng Feng Huang
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.)
Racal Data Communications Inc
Original Assignee
Racal Data Communications Inc
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 Racal Data Communications Inc filed Critical Racal Data Communications Inc
Publication of GB8626415D0 publication Critical patent/GB8626415D0/en
Publication of GB2182829A publication Critical patent/GB2182829A/en
Application granted granted Critical
Publication of GB2182829B publication Critical patent/GB2182829B/en
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
    • H04B3/238—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
    • 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)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
GB8626415A 1985-11-12 1986-11-05 High speed analog echo canceller Expired GB2182829B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/797,280 US4811342A (en) 1985-11-12 1985-11-12 High speed analog echo canceller

Publications (3)

Publication Number Publication Date
GB8626415D0 GB8626415D0 (en) 1986-12-03
GB2182829A GB2182829A (en) 1987-05-20
GB2182829B true GB2182829B (en) 1989-12-06

Family

ID=25170392

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8626415A Expired GB2182829B (en) 1985-11-12 1986-11-05 High speed analog echo canceller

Country Status (3)

Country Link
US (1) US4811342A (en)
JP (1) JPS62118644A (en)
GB (1) GB2182829B (en)

Families Citing this family (21)

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Publication number Priority date Publication date Assignee Title
US5289459A (en) * 1986-12-01 1994-02-22 British Telecommunications Plc Duplex data transmission
CA1315356C (en) * 1988-07-20 1993-03-30 Seiji Miyoshi Digital adaptive filter and method of convergence therein
JPH02280422A (en) * 1989-04-20 1990-11-16 Nec Corp Training method for echo canceller for voice conference equipment
JPH04362854A (en) * 1991-06-11 1992-12-15 Canon Inc Data communication equipment
JPH0669834A (en) * 1992-08-24 1994-03-11 Mitsubishi Electric Corp Two-wire/four-wire converter
US6041118A (en) * 1994-12-22 2000-03-21 Lucent Technologies Inc. Architecture for telephone set
US5578939A (en) * 1995-01-23 1996-11-26 Beers; Gregory E. Bidirectional transmission line driver/receiver
JP4052697B2 (en) 1996-10-09 2008-02-27 富士通株式会社 Signal transmission system and receiver circuit of the signal transmission system
US6147979A (en) * 1997-08-12 2000-11-14 Lucent Technologies, Inc. System and method for echo cancellation in a communication system
JP4197755B2 (en) 1997-11-19 2008-12-17 富士通株式会社 Signal transmission system, receiver circuit of the signal transmission system, and semiconductor memory device to which the signal transmission system is applied
EP1260033A1 (en) * 2000-02-21 2002-11-27 Surf Communication Solution, Ltd. Adaptive echo canceling
US6518800B2 (en) * 2000-05-31 2003-02-11 Texas Instruments Incorporated System and method for reducing timing mismatch in sample and hold circuits using the clock
US6771675B1 (en) 2000-08-17 2004-08-03 International Business Machines Corporation Method for facilitating simultaneous multi-directional transmission of multiple signals between multiple circuits using a single transmission line
US7095788B1 (en) 2000-08-17 2006-08-22 International Business Machines Corporation Circuit for facilitating simultaneous multi-directional transmission of multiple signals between multiple circuits using a single transmission line
US6804348B1 (en) * 2000-11-08 2004-10-12 Viadux, Inc. Circuit for echo-cancellation in an asymmetric, two-way time-and frequency-shared communication medium
US7333448B2 (en) * 2003-11-03 2008-02-19 Teranetics, Inc. Full duplex transceiver
US7561626B2 (en) * 2004-06-09 2009-07-14 Marvell World Trade Ltd. Method and system for channel estimation in a data transmission system
US7697619B2 (en) * 2004-06-09 2010-04-13 Marvell World Trade Ltd. Training sequence for channel estimation in a data transmission system
US7817730B2 (en) * 2004-06-09 2010-10-19 Marvell World Trade Ltd. Training sequence for symbol boundary detection in a multicarrier data transmission system
US7643582B2 (en) 2004-06-09 2010-01-05 Marvell World Trade Ltd. Method and system for determining symbol boundary timing in a multicarrier data transmission system
US7561627B2 (en) * 2005-01-06 2009-07-14 Marvell World Trade Ltd. Method and system for channel equalization and crosstalk estimation in a multicarrier data transmission system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2021363A (en) * 1978-05-16 1979-11-28 Kokusai Denshin Denwa Co Ltd Echo control system
EP0122594A2 (en) * 1983-04-18 1984-10-24 International Standard Electric Corporation Line circuit with echo compensation

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB122594A (en) * 1918-08-08 1919-01-30 George Knight Letts Improvements relating to Kettles, Saucepans, and the like.
US3535473A (en) * 1966-10-31 1970-10-20 Bell Telephone Labor Inc Self-adjusting echo canceller
US3499999A (en) * 1966-10-31 1970-03-10 Bell Telephone Labor Inc Closed loop adaptive echo canceller using generalized filter networks
US3500000A (en) * 1966-10-31 1970-03-10 Myldred P Kelly Self-adaptive echo canceller
US3647923A (en) * 1968-07-15 1972-03-07 Gulf Research Development Co Resin compositions containing hindered phenols
US3723911A (en) * 1971-09-13 1973-03-27 Codex Corp Training adaptive linear filters
US3735055A (en) * 1971-11-05 1973-05-22 Bell Telephone Labor Inc Method for improving the settling time of a transversal filter adaptive echo canceller
US3836734A (en) * 1971-12-03 1974-09-17 Communications Satellite Corp Adaptive echo canceller with multi-increment gain coefficient corrections
NL173022C (en) * 1975-07-01 1983-12-01 Pielkenrood Vinitex Bv DEVICE FOR DRAINING COMPONENTS OF A LIQUID FLOATING.
US4064379A (en) * 1976-06-11 1977-12-20 Communications Satellite Corporation Logarithmic echo canceller
US4072830A (en) * 1976-10-04 1978-02-07 Bell Telephone Laboratories, Incorporated Variable phase shifter for adaptive echo cancellers
NL7903759A (en) * 1979-05-14 1980-11-18 Philips Nv ECHO COMPENSATOR WITH HIGH-PASS FILTER.
US4417317A (en) * 1980-02-04 1983-11-22 Westinghouse Electric Corp. Adaptive analog processor
US4400790A (en) * 1981-01-06 1983-08-23 E-Systems, Inc. Transversal correlator
NL8100650A (en) * 1981-02-11 1982-09-01 Philips Nv DEVICE FOR CORRECTING PULSE DISTORTION IN HOMOCHRONOUS DATA TRANSMISSION.
IT1144154B (en) * 1981-03-09 1986-10-29 Cselt Centro Studi Lab Telecom SIMULTANEOUS BIDIRECTIONAL TRANSMISSION SYSTEM ON TWO-CONDUCTOR LINE FOR NUMERIC TELEPHONE
US4394767A (en) * 1981-07-07 1983-07-19 General Datacomm Industries, Inc. Data transmission over long distance circuits
US4411006A (en) * 1981-09-09 1983-10-18 Communication Satellite Corporation Digital bit rate synchronizer for digital echo cancellers and similar signal processing devices
US4425483A (en) * 1981-10-13 1984-01-10 Northern Telecom Limited Echo cancellation using transversal filters
FR2517905B1 (en) * 1981-12-09 1985-11-29 Telecommunications Sa INITIALIZATION DEVICE FOR ECHO CANCELER AND ITS APPLICATION TO FAR ECHOES
US4621172A (en) * 1982-12-22 1986-11-04 Nec Corporation Fast convergence method and system for echo canceller

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2021363A (en) * 1978-05-16 1979-11-28 Kokusai Denshin Denwa Co Ltd Echo control system
EP0122594A2 (en) * 1983-04-18 1984-10-24 International Standard Electric Corporation Line circuit with echo compensation

Also Published As

Publication number Publication date
GB8626415D0 (en) 1986-12-03
GB2182829A (en) 1987-05-20
JPS62118644A (en) 1987-05-30
US4811342A (en) 1989-03-07

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19961105