CH657241A5 - Adaptive echokompensationseinrichtung zur digitalen duplexuebertragung auf zweidrahtleitungen. - Google Patents

Adaptive echokompensationseinrichtung zur digitalen duplexuebertragung auf zweidrahtleitungen. Download PDF

Info

Publication number
CH657241A5
CH657241A5 CH311782A CH311782A CH657241A5 CH 657241 A5 CH657241 A5 CH 657241A5 CH 311782 A CH311782 A CH 311782A CH 311782 A CH311782 A CH 311782A CH 657241 A5 CH657241 A5 CH 657241A5
Authority
CH
Switzerland
Prior art keywords
filter
signal
recursive
coefficient
error signal
Prior art date
Application number
CH311782A
Other languages
German (de)
English (en)
Inventor
Siegbert Hentschke
Peter Wildenauer
Original Assignee
Int Standard Electric 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 Int Standard Electric Corp filed Critical Int Standard Electric Corp
Publication of CH657241A5 publication Critical patent/CH657241A5/de

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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
    • H04B3/237—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 two adaptive filters, e.g. for near end and for end echo cancelling
    • 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)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Bidirectional Digital Transmission (AREA)
CH311782A 1981-05-22 1982-05-19 Adaptive echokompensationseinrichtung zur digitalen duplexuebertragung auf zweidrahtleitungen. CH657241A5 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19813120434 DE3120434A1 (de) 1981-05-22 1981-05-22 Adaptive echokompensationseinrichtung zur digitalen duplexuebertragung auf zweidrahtleitungen

Publications (1)

Publication Number Publication Date
CH657241A5 true CH657241A5 (de) 1986-08-15

Family

ID=6133005

Family Applications (1)

Application Number Title Priority Date Filing Date
CH311782A CH657241A5 (de) 1981-05-22 1982-05-19 Adaptive echokompensationseinrichtung zur digitalen duplexuebertragung auf zweidrahtleitungen.

Country Status (6)

Country Link
AU (1) AU549938B2 (fr)
BE (1) BE893274A (fr)
CH (1) CH657241A5 (fr)
DE (1) DE3120434A1 (fr)
GB (1) GB2102255B (fr)
SE (1) SE447619B (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2540314A1 (fr) * 1983-01-31 1984-08-03 Trt Telecom Radio Electr Procede d'initialisation des coefficients de filtres dans un dispositif d'annulation d'echos proche et lointain et dispositif de mise en oeuvre de ce procede
JPS59151546A (ja) * 1983-02-18 1984-08-30 Nec Corp 適応形反響消去装置
US4598396A (en) * 1984-04-03 1986-07-01 Itt Corporation Duplex transmission mechanism for digital telephones
SE461308B (sv) * 1988-06-03 1990-01-29 Ericsson Telefon Ab L M Adaptivt digitalt filter omfattande en icke rekursiv del och en rekursiv del
US5062102A (en) * 1988-12-01 1991-10-29 Nec Corporation Echo canceller with means for determining filter coefficients from autocorrelation and cross-correlation coefficients
GB2362063A (en) * 2000-04-25 2001-11-07 Mitel Corp Connecting broadband voice and data signals to telephone systems

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4087654A (en) * 1975-11-28 1978-05-02 Bell Telephone Laboratories, Incorporated Echo canceller for two-wire full duplex data transmission
SE416367B (sv) * 1976-09-07 1980-12-15 Western Electric Co Ekoelimineringsanordning

Also Published As

Publication number Publication date
SE447619B (sv) 1986-11-24
AU8381682A (en) 1982-11-25
SE8203102L (sv) 1982-11-23
AU549938B2 (en) 1986-02-20
GB2102255A (en) 1983-01-26
DE3120434A1 (de) 1982-12-16
BE893274A (fr) 1982-11-24
GB2102255B (en) 1985-01-09

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Owner name: ALCATEL N.V.

PL Patent ceased
PL Patent ceased