CA948715A - Automatic equalizer for phase-modulation data transmission systems - Google Patents

Automatic equalizer for phase-modulation data transmission systems

Info

Publication number
CA948715A
CA948715A CA143,433A CA143433A CA948715A CA 948715 A CA948715 A CA 948715A CA 143433 A CA143433 A CA 143433A CA 948715 A CA948715 A CA 948715A
Authority
CA
Canada
Prior art keywords
phase
data transmission
transmission systems
modulation data
automatic equalizer
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
CA143,433A
Other languages
English (en)
Other versions
CA143433S (en
Inventor
Henry C. Schroeder
John R. Sheehan
Robert J. Tracey
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.)
AT&T Corp
Original Assignee
Western Electric Co 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 Western Electric Co Inc filed Critical Western Electric Co Inc
Application granted granted Critical
Publication of CA948715A publication Critical patent/CA948715A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/01—Equalisers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Filters That Use Time-Delay Elements (AREA)
CA143,433A 1971-11-17 1972-05-30 Automatic equalizer for phase-modulation data transmission systems Expired CA948715A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US19969371A 1971-11-17 1971-11-17

Publications (1)

Publication Number Publication Date
CA948715A true CA948715A (en) 1974-06-04

Family

ID=22738619

Family Applications (1)

Application Number Title Priority Date Filing Date
CA143,433A Expired CA948715A (en) 1971-11-17 1972-05-30 Automatic equalizer for phase-modulation data transmission systems

Country Status (11)

Country Link
US (1) US3727136A (de)
JP (1) JPS5415742B2 (de)
AU (1) AU472937B2 (de)
BE (1) BE791373A (de)
CA (1) CA948715A (de)
DE (1) DE2255821C3 (de)
FR (1) FR2161680A5 (de)
GB (1) GB1410475A (de)
IT (1) IT975748B (de)
NL (1) NL157473B (de)
SE (1) SE388094B (de)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3755738A (en) * 1972-05-01 1973-08-28 Bell Telephone Labor Inc Passband equalizer for phase-modulated data signals
GB1450923A (en) * 1973-10-05 1976-09-29 Plessey Co Ltd Data transmission systems
US3906347A (en) * 1973-10-11 1975-09-16 Hycom Inc Transversal equalizer for use in double sideband quadrature amplitude modulated system
US3878468A (en) * 1974-01-30 1975-04-15 Bell Telephone Labor Inc Joint equalization and carrier recovery adaptation in data transmission systems
US3898564A (en) * 1974-03-11 1975-08-05 Bell Telephone Labor Inc Margin monitoring circuit for repeatered digital transmission line
US3914691A (en) * 1974-08-21 1975-10-21 Bell Telephone Labor Inc Repositioning of equalizer tap-gain coefficients
DE2619392C3 (de) * 1976-04-30 1978-11-02 Siemens Ag, 1000 Berlin Und 8000 Muenchen Entzerrer zur adaptiven Basisband-Entzerrung eines phasenmodulierten Signals
US4112370A (en) * 1976-08-06 1978-09-05 Signatron, Inc. Digital communications receiver for dual input signal
US4313202A (en) * 1980-04-03 1982-01-26 Codex Corporation Modem circuitry
JPS57109089A (en) * 1980-12-26 1982-07-07 Nec Corp Initial value resetting circuit for operational amplifier
US5067140A (en) * 1989-08-16 1991-11-19 Titan Linkabit Corporation Conversion of analog signal into i and q digital signals with enhanced image rejection
US5182530A (en) * 1991-01-11 1993-01-26 Loral Aerospace Corp. Transversal filter for parabolic phase equalization
JP3131055B2 (ja) * 1992-12-15 2001-01-31 富士通株式会社 データ通信用モデムのタイミング位相判定装置及び方法
US5828700A (en) * 1993-08-05 1998-10-27 Micro Linear Corporation Adaptive equalizer circuit
JP3462937B2 (ja) * 1994-09-27 2003-11-05 富士通株式会社 自動振幅等化器
US5844941A (en) * 1995-07-20 1998-12-01 Micro Linear Corporation Parallel adaptive equalizer circuit
US6721358B1 (en) * 1999-09-01 2004-04-13 The United States Of America As Represented By The Secretary Of The Navy Signal synthesizer and method therefor
US6687292B1 (en) * 1999-12-21 2004-02-03 Texas Instruments Incorporated Timing phase acquisition method and device for telecommunications systems
US11750427B1 (en) * 2022-05-04 2023-09-05 L3Harris Technologies, Inc. Low-noise highly-linear wideband vector modulators

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3400332A (en) * 1965-12-27 1968-09-03 Bell Telephone Labor Inc Automatic equalizer for quadrature data channels

Also Published As

Publication number Publication date
FR2161680A5 (de) 1973-07-06
NL157473B (nl) 1978-07-17
DE2255821C3 (de) 1975-08-14
AU4881172A (en) 1974-05-16
JPS5415742B2 (de) 1979-06-16
GB1410475A (en) 1975-10-15
DE2255821B2 (de) 1975-01-09
BE791373A (fr) 1973-03-01
DE2255821A1 (de) 1973-05-24
JPS4863658A (de) 1973-09-04
NL7215521A (de) 1973-05-21
US3727136A (en) 1973-04-10
SE388094B (sv) 1976-09-20
AU472937B2 (en) 1976-06-10
IT975748B (it) 1974-08-10

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