CA1033012A - Joint equalization and carrier recovery adaptation in data transmission systems - Google Patents

Joint equalization and carrier recovery adaptation in data transmission systems

Info

Publication number
CA1033012A
CA1033012A CA210,371A CA210371A CA1033012A CA 1033012 A CA1033012 A CA 1033012A CA 210371 A CA210371 A CA 210371A CA 1033012 A CA1033012 A CA 1033012A
Authority
CA
Canada
Prior art keywords
data transmission
transmission systems
carrier recovery
joint equalization
adaptation
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
CA210,371A
Other languages
French (fr)
Other versions
CA210371S (en
Inventor
David A. Spaulding
David D. Falconer
Kurt H. Mueller
Jack Salz
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 CA1033012A publication Critical patent/CA1033012A/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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/38—Demodulator circuits; Receiver circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/38—Demodulator circuits; Receiver circuits
    • H04L27/3818—Demodulator circuits; Receiver circuits using coherent demodulation, i.e. using one or more nominally phase synchronous carriers
    • H04L27/3836—Demodulator circuits; Receiver circuits using coherent demodulation, i.e. using one or more nominally phase synchronous carriers in which the carrier is recovered using the received modulated signal or the received IF signal, e.g. by detecting a pilot or by frequency multiplication
CA210,371A 1974-01-30 1974-09-30 Joint equalization and carrier recovery adaptation in data transmission systems Expired CA1033012A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US437978A US3878468A (en) 1974-01-30 1974-01-30 Joint equalization and carrier recovery adaptation in data transmission systems

Publications (1)

Publication Number Publication Date
CA1033012A true CA1033012A (en) 1978-06-13

Family

ID=23738727

Family Applications (1)

Application Number Title Priority Date Filing Date
CA210,371A Expired CA1033012A (en) 1974-01-30 1974-09-30 Joint equalization and carrier recovery adaptation in data transmission systems

Country Status (6)

Country Link
US (1) US3878468A (en)
JP (1) JPS5829672B2 (en)
CA (1) CA1033012A (en)
DE (1) DE2503595C2 (en)
FR (1) FR2259492B1 (en)
GB (1) GB1493466A (en)

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FR2455406B1 (en) * 1979-04-27 1987-05-29 Cit Alcatel METHOD FOR COMPENSATING FOR PHASE NOISE ON RECEPTION OF DATA TRANSMISSION
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IT1119567B (en) * 1979-11-08 1986-03-10 Cselt Centro Studi Lab Telecom ADAPTIVE NUMERIC EQUALIZER FOR DATA SIGNAL RECEIVERS USING A DIFFERENTIAL PHASE MODULATION
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US4313202A (en) * 1980-04-03 1982-01-26 Codex Corporation Modem circuitry
US4397039A (en) * 1980-12-29 1983-08-02 International Business Machines Corporation Instantaneous phase tracking in single sideband systems
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US4777640A (en) * 1986-06-09 1988-10-11 Motorola, Inc. Frequency adaptive phase jitter canceler
US4953186A (en) * 1988-02-19 1990-08-28 Silicon Systems, Inc. Phase jitter tracker
US5132926A (en) * 1990-09-21 1992-07-21 Proteon, Inc. Token ring equalizer
US5640417A (en) * 1991-10-04 1997-06-17 Harris Canada, Inc. QAM detector which compensates for received symbol distortion induced by a cellular base station
US5754591A (en) * 1994-08-03 1998-05-19 Broadcom Corporation System for, and method of, processing quadrature amplitude modulated signals
US5930286A (en) * 1995-12-06 1999-07-27 Conexant Systems, Inc. Gain imbalance compensation for a quadrature receiver in a cordless direct sequence spread spectrum telephone
US5815529A (en) * 1996-04-04 1998-09-29 Lucent Technologies Inc. Transmission system for digital audio broadcasting that incorporates a rotator in the transmitter
US6097767A (en) * 1998-04-17 2000-08-01 Advanced Micro Devices, Inc. Apparatus and method for determining an optimum equalizer setting for a signal equalizer in a communication network receiver
US6567981B1 (en) * 1998-08-03 2003-05-20 Elysium Broadband Inc. Audio/video signal redistribution system
US6775334B1 (en) * 1998-11-03 2004-08-10 Broadcom Corporation Equalization and decision-directed loops with trellis demodulation in high definition TV
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US7079574B2 (en) 2001-01-17 2006-07-18 Radiant Networks Plc Carrier phase recovery system for adaptive burst modems and link hopping radio networks
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US7184489B2 (en) * 2001-04-27 2007-02-27 The Directv Group, Inc. Optimization technique for layered modulation
US7151807B2 (en) 2001-04-27 2006-12-19 The Directv Group, Inc. Fast acquisition of timing and carrier frequency from received signal
US7583728B2 (en) * 2002-10-25 2009-09-01 The Directv Group, Inc. Equalizers for layered modulated and other signals
US7209524B2 (en) * 2001-04-27 2007-04-24 The Directv Group, Inc. Layered modulation for digital signals
US7184473B2 (en) * 2001-04-27 2007-02-27 The Directv Group, Inc. Equalizers for layered modulated and other signals
US7245671B1 (en) * 2001-04-27 2007-07-17 The Directv Group, Inc. Preprocessing signal layers in a layered modulation digital signal system to use legacy receivers
US7173981B1 (en) 2001-04-27 2007-02-06 The Directv Group, Inc. Dual layer signal processing in a layered modulation digital signal system
US7778365B2 (en) * 2001-04-27 2010-08-17 The Directv Group, Inc. Satellite TWTA on-line non-linearity measurement
US7471735B2 (en) * 2001-04-27 2008-12-30 The Directv Group, Inc. Maximizing power and spectral efficiencies for layered and conventional modulations
US7822154B2 (en) * 2001-04-27 2010-10-26 The Directv Group, Inc. Signal, interference and noise power measurement
US7639759B2 (en) 2001-04-27 2009-12-29 The Directv Group, Inc. Carrier to noise ratio estimations from a received signal
US8005035B2 (en) * 2001-04-27 2011-08-23 The Directv Group, Inc. Online output multiplexer filter measurement
US7502430B2 (en) * 2001-04-27 2009-03-10 The Directv Group, Inc. Coherent averaging for measuring traveling wave tube amplifier nonlinearity
US6628707B2 (en) 2001-05-04 2003-09-30 Radiant Networks Plc Adaptive equalizer system for short burst modems and link hopping radio networks
US7139343B2 (en) * 2002-03-27 2006-11-21 Hitachi Kokusai Electric Inc. Digital radio receiver
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DE2020805C3 (en) * 1970-04-28 1974-07-11 Siemens Ag, 1000 Berlin Und 8000 Muenchen Equalizer for equalizing phase or quadrature modulated data signals
US3715665A (en) * 1971-06-15 1973-02-06 Bell Telephone Labor Inc Joint initial setting of attenuator coefficients and sampling time in automatic equalizers for synchronous data transmission systems
BE791373A (en) * 1971-11-17 1973-03-01 Western Electric Co AUTOMATIC EQUALIZER FOR PHASE AMODULATION DATA TRANSMISSION SYSTEM
US3715670A (en) * 1971-12-20 1973-02-06 Bell Telephone Labor Inc Adaptive dc restoration in single-sideband data systems
US3755738A (en) * 1972-05-01 1973-08-28 Bell Telephone Labor Inc Passband equalizer for phase-modulated data signals

Also Published As

Publication number Publication date
US3878468A (en) 1975-04-15
JPS50110267A (en) 1975-08-30
JPS5829672B2 (en) 1983-06-24
DE2503595C2 (en) 1985-01-24
GB1493466A (en) 1977-11-30
FR2259492A1 (en) 1975-08-22
DE2503595A1 (en) 1975-07-31
FR2259492B1 (en) 1980-03-14

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