DE69029117D1 - Linearisierer für QAM-Empfänger - Google Patents

Linearisierer für QAM-Empfänger

Info

Publication number
DE69029117D1
DE69029117D1 DE69029117T DE69029117T DE69029117D1 DE 69029117 D1 DE69029117 D1 DE 69029117D1 DE 69029117 T DE69029117 T DE 69029117T DE 69029117 T DE69029117 T DE 69029117T DE 69029117 D1 DE69029117 D1 DE 69029117D1
Authority
DE
Germany
Prior art keywords
linearizer
qam receivers
qam
receivers
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 - Fee Related
Application number
DE69029117T
Other languages
English (en)
Other versions
DE69029117T2 (de
Inventor
James Price Moffatt
Mitchell Allen Skinner
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
AT&T 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 AT&T Corp filed Critical AT&T Corp
Application granted granted Critical
Publication of DE69029117D1 publication Critical patent/DE69029117D1/de
Publication of DE69029117T2 publication Critical patent/DE69029117T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H04L27/32—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
    • H04L27/36—Modulator circuits; Transmitter circuits
    • H04L27/366—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator
    • H04L27/367—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator using predistortion
    • H04L27/368—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator using predistortion adaptive predistortion
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/32—Modifications of amplifiers to reduce non-linear distortion
    • H03F1/3223—Modifications of amplifiers to reduce non-linear distortion using feed-forward
    • 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
    • H04L27/3809—Amplitude regulation arrangements
    • 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
    • H04L27/3845—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier
    • H04L27/3854—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier using a non - coherent carrier, including systems with baseband correction for phase or frequency offset
    • H04L27/3872—Compensation for phase rotation in the demodulated signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Power Engineering (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Dc Digital Transmission (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Analogue/Digital Conversion (AREA)
DE69029117T 1989-09-05 1990-08-30 Linearisierer für QAM-Empfänger Expired - Fee Related DE69029117T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/402,750 US4993047A (en) 1989-09-05 1989-09-05 Volterra linearizer for digital transmission

Publications (2)

Publication Number Publication Date
DE69029117D1 true DE69029117D1 (de) 1996-12-19
DE69029117T2 DE69029117T2 (de) 1997-05-28

Family

ID=23593171

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69029117T Expired - Fee Related DE69029117T2 (de) 1989-09-05 1990-08-30 Linearisierer für QAM-Empfänger

Country Status (5)

Country Link
US (1) US4993047A (de)
EP (1) EP0421601B1 (de)
JP (1) JPH0736568B2 (de)
CA (1) CA2024353C (de)
DE (1) DE69029117T2 (de)

Families Citing this family (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5134634A (en) * 1989-08-31 1992-07-28 Nec Corporation Multilevel quadrature amplitude demodulator capable of compensating for a quadrature phase deviation of a carrier signal pair
JP2522144B2 (ja) * 1993-01-14 1996-08-07 日本電気株式会社 位相曖昧度除去回路
JPH08130564A (ja) * 1994-11-02 1996-05-21 Fujitsu Ltd アイパターン表示方法、通信装置および表示装置
US5910965A (en) * 1995-06-30 1999-06-08 Harris Corporation Adaptive predistortion using over-the-hop feedback
AUPN455695A0 (en) * 1995-08-01 1995-08-24 Canon Kabushiki Kaisha Qam spread spectrum demodulation system
AU684688B2 (en) * 1995-08-01 1997-12-18 Canon Kabushiki Kaisha QAM spread spectrum demodulation system
US5744969A (en) * 1995-12-29 1998-04-28 Lucent Technologies Inc. Analog and mixed signal device tester
KR100474821B1 (ko) * 1997-08-26 2005-06-28 삼성전자주식회사 비선형특성을갖는재생신호처리장치및방법
WO1999041839A1 (en) * 1998-02-12 1999-08-19 Koninklijke Philips Electronics N.V. A method and device for nonlinear likelihood sequence estimation
US6501805B1 (en) 1999-05-14 2002-12-31 Harris Corporation Broadcast transmission system with single correction filter for correcting linear and non-linear distortion
US8005035B2 (en) * 2001-04-27 2011-08-23 The Directv Group, Inc. Online output multiplexer filter measurement
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
US7471735B2 (en) * 2001-04-27 2008-12-30 The Directv Group, Inc. Maximizing power and spectral efficiencies for layered and conventional modulations
US7151807B2 (en) * 2001-04-27 2006-12-19 The Directv Group, Inc. Fast acquisition of timing and carrier frequency from received signal
US7423987B2 (en) * 2001-04-27 2008-09-09 The Directv Group, Inc. Feeder link configurations to support layered modulation for digital signals
US7583728B2 (en) * 2002-10-25 2009-09-01 The Directv Group, Inc. Equalizers for layered modulated and other signals
US7184489B2 (en) * 2001-04-27 2007-02-27 The Directv Group, Inc. Optimization technique for layered modulation
US7512189B2 (en) 2001-04-27 2009-03-31 The Directv Group, Inc. Lower complexity layered modulation signal processor
US7483505B2 (en) * 2001-04-27 2009-01-27 The Directv Group, Inc. Unblind equalizer architecture for digital communication systems
US7639759B2 (en) * 2001-04-27 2009-12-29 The Directv Group, Inc. Carrier to noise ratio estimations from a received signal
US7822154B2 (en) * 2001-04-27 2010-10-26 The Directv Group, Inc. Signal, interference and noise power measurement
US7173981B1 (en) 2001-04-27 2007-02-06 The Directv Group, Inc. Dual layer signal processing in a layered modulation digital signal system
US7184473B2 (en) * 2001-04-27 2007-02-27 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
US7502430B2 (en) * 2001-04-27 2009-03-10 The Directv Group, Inc. Coherent averaging for measuring traveling wave tube amplifier nonlinearity
US7058369B1 (en) 2001-11-21 2006-06-06 Pmc-Sierra Inc. Constant gain digital predistortion controller for linearization of non-linear amplifiers
AR040366A1 (es) * 2002-07-01 2005-03-30 Hughes Electronics Corp Mejora del rendimiento de la modulacion jerarquica por desplazamiento de ocho fases (8psk)
US7738587B2 (en) * 2002-07-03 2010-06-15 The Directv Group, Inc. Method and apparatus for layered modulation
EP1579706B1 (de) * 2002-10-25 2010-12-08 The Directv Group, Inc. Verfahren und vorrichtung zum anpassen von trägerleistungsanforderungen gemäss verfügbarkeit in geschichteten modulationssystemen
US7463676B2 (en) * 2002-10-25 2008-12-09 The Directv Group, Inc. On-line phase noise measurement for layered modulation
US7230480B2 (en) * 2002-10-25 2007-06-12 The Directv Group, Inc. Estimating the operating point on a non-linear traveling wave tube amplifier
US7474710B2 (en) * 2002-10-25 2009-01-06 The Directv Group, Inc. Amplitude and phase matching for layered modulation reception
US7529312B2 (en) * 2002-10-25 2009-05-05 The Directv Group, Inc. Layered modulation for terrestrial ATSC applications
US7502429B2 (en) * 2003-10-10 2009-03-10 The Directv Group, Inc. Equalization for traveling wave tube amplifier nonlinearity measurements
US20080188253A1 (en) * 2007-01-31 2008-08-07 Ntt Docomo, Inc. Method and system for wireless design subject to interference constraints
US10318158B2 (en) 2012-05-17 2019-06-11 Brilliant Points, Inc. System and method for digital signaling and digital storage
US8860594B2 (en) * 2012-05-17 2014-10-14 Brilliant Points, Inc. System and method for digital signaling

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3906401A (en) * 1974-09-03 1975-09-16 Bell Telephone Labor Inc Feedforward error correction in interferometer modulators
US4462001A (en) * 1982-02-22 1984-07-24 Canadian Patents & Development Limited Baseband linearizer for wideband, high power, nonlinear amplifiers
JPS5985166A (ja) * 1982-10-29 1984-05-17 Fujitsu Ltd 位相変調器
US4644565A (en) * 1984-06-12 1987-02-17 Canadian Patents And Development Limited-Societe Canadienne Des Brevets Et D'exploitation Limitee Superposed quadrature modulated baseband signal processor
JPS6436153A (en) * 1987-07-31 1989-02-07 Nec Corp Quadruple phase modulator
JPH0626352B2 (ja) * 1987-11-20 1994-04-06 日本電気エンジニアリング株式会社 プログラマブル変調回路

Also Published As

Publication number Publication date
JPH0736568B2 (ja) 1995-04-19
US4993047A (en) 1991-02-12
DE69029117T2 (de) 1997-05-28
CA2024353C (en) 1993-07-27
EP0421601A3 (en) 1993-01-13
CA2024353A1 (en) 1991-03-06
JPH0399524A (ja) 1991-04-24
EP0421601B1 (de) 1996-11-13
EP0421601A2 (de) 1991-04-10

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee