CA1149022A - Carrier detector in a modem provided with an echo canceler - Google Patents

Carrier detector in a modem provided with an echo canceler

Info

Publication number
CA1149022A
CA1149022A CA000363614A CA363614A CA1149022A CA 1149022 A CA1149022 A CA 1149022A CA 000363614 A CA000363614 A CA 000363614A CA 363614 A CA363614 A CA 363614A CA 1149022 A CA1149022 A CA 1149022A
Authority
CA
Canada
Prior art keywords
carrier
signal
level
output
circuit
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
CA000363614A
Other languages
English (en)
French (fr)
Inventor
Loic B.Y. Guidoux
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.)
SIGNAUX Cie
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of CA1149022A publication Critical patent/CA1149022A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
    • H04L1/206—Arrangements for detecting or preventing errors in the information received using signal quality detector for modulated 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)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
CA000363614A 1979-11-07 1980-10-30 Carrier detector in a modem provided with an echo canceler Expired CA1149022A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7927479 1979-11-07
FR7927479A FR2469837A1 (fr) 1979-11-07 1979-11-07 Dispositif de detection de porteuse dans un modem muni d'un annuleur d'echo

Publications (1)

Publication Number Publication Date
CA1149022A true CA1149022A (en) 1983-06-28

Family

ID=9231397

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000363614A Expired CA1149022A (en) 1979-11-07 1980-10-30 Carrier detector in a modem provided with an echo canceler

Country Status (6)

Country Link
US (1) US4355406A (online.php)
EP (1) EP0028857B1 (online.php)
JP (1) JPS56138352A (online.php)
CA (1) CA1149022A (online.php)
DE (1) DE3062462D1 (online.php)
FR (1) FR2469837A1 (online.php)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2517906A1 (fr) * 1981-12-03 1983-06-10 Centre Nat Rech Scient Annulateur d'echo a commande automatique de gain pour systemes de transmission
US4443884A (en) * 1982-03-18 1984-04-17 Protocol Computers, Inc. Data line interface
JPH0666819B2 (ja) * 1982-09-30 1994-08-24 富士通株式会社 キヤリア検出方式
FR2534754A1 (fr) * 1982-10-15 1984-04-20 Trt Telecom Radio Electr Recepteur pour modem de transmission de donnees, comportant un annuleur d'echo et un egaliseur
US4593399A (en) * 1983-05-09 1986-06-03 Racal Data Communications Inc. Method and apparatus for maximizing efficiency in satellite communications
GB2146509B (en) * 1983-09-10 1986-08-13 Stc Plc Data transmission system
US4554508A (en) * 1983-12-07 1985-11-19 American Microsystems, Incorporated Carrier detection circuit
SE441052B (sv) * 1984-02-01 1985-09-02 Ellemtel Utvecklings Ab Forfarande for att testa funktionen hos en anordning for adaptiv ekoeliminering
US4546490A (en) * 1984-03-22 1985-10-08 Northern Telecom Limited Single frequency detection circuit
DE3583052D1 (de) * 1984-03-30 1991-07-11 Siemens Ag Schaltungsanordnung zum pruefen der funktionsfaehigkeit einer datenuebertragunseinrichtung.
US4766601A (en) * 1985-12-23 1988-08-23 Tektronix, Inc. Constant carrier watchdog
US4742510A (en) * 1986-04-04 1988-05-03 Massachusetts Institute Of Technology Near and far echo canceller for data communications
US4995030A (en) * 1988-02-01 1991-02-19 Memotec Datacom, Inc. Far end echo cancellation method and apparatus
CN111934656A (zh) * 2020-08-20 2020-11-13 索伦特(天津)自动化技术有限公司 气体超声流量计自动增益调整的滞回比较电路及实现方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE626509A (online.php) * 1961-12-29
US3275759A (en) * 1963-04-15 1966-09-27 Bell Telephone Labor Inc Break-in arrangement with compensation for variations in the trans-hybrid loss for echo suppressors
US3560669A (en) * 1969-02-25 1971-02-02 Wescom Echo suppressor
US3783194A (en) * 1972-11-20 1974-01-01 Milgo Electronic Corp Data modem having a fast turn-around time over direct distance dialed networks
US4009356A (en) * 1974-01-31 1977-02-22 Milgo Electronic Corporation Data modems having data drop-out and data echo protection
DE2442822C3 (de) * 1974-09-06 1979-04-05 Siemens Ag, 1000 Berlin Und 8000 Muenchen Schaltungsanordnung zur Messung von auf Datenubertragungsstrecken auftretenden Pegelunterbrechungen und Pegelabsenkungen

Also Published As

Publication number Publication date
FR2469837A1 (fr) 1981-05-22
US4355406A (en) 1982-10-19
FR2469837B1 (online.php) 1982-08-13
EP0028857B1 (fr) 1983-03-23
JPS6324582B2 (online.php) 1988-05-21
EP0028857A1 (fr) 1981-05-20
JPS56138352A (en) 1981-10-28
DE3062462D1 (en) 1983-04-28

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Legal Events

Date Code Title Description
MKEX Expiry