EE200000371A - Meetod ja seade eelmoonutuse lineariseerimiseks laias sagedusvahemikus - Google Patents

Meetod ja seade eelmoonutuse lineariseerimiseks laias sagedusvahemikus

Info

Publication number
EE200000371A
EE200000371A EEP200000371A EEP200000371A EE200000371A EE 200000371 A EE200000371 A EE 200000371A EE P200000371 A EEP200000371 A EE P200000371A EE P200000371 A EEP200000371 A EE P200000371A EE 200000371 A EE200000371 A EE 200000371A
Authority
EE
Estonia
Prior art keywords
linearization
frequency range
wide frequency
predistortion
over
Prior art date
Application number
EEP200000371A
Other languages
English (en)
Inventor
Briffa Mark
Bergsten P�r
Original Assignee
Telefonaktiebolaget Lm Ericsson (Publ)
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 Telefonaktiebolaget Lm Ericsson (Publ) filed Critical Telefonaktiebolaget Lm Ericsson (Publ)
Publication of EE200000371A publication Critical patent/EE200000371A/et

Links

Classifications

    • 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
    • H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
    • H03F1/3247—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits using feedback acting on predistortion circuits
    • 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
    • H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
    • H03F1/3258—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits based on polynomial terms
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/102—A non-specified detector of a signal envelope being used in an amplifying circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/451—Indexing scheme relating to amplifiers the amplifier being a radio frequency amplifier

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Algebra (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • Amplifiers (AREA)
EEP200000371A 1997-12-22 1998-12-22 Meetod ja seade eelmoonutuse lineariseerimiseks laias sagedusvahemikus EE200000371A (et)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/995,663 US6075411A (en) 1997-12-22 1997-12-22 Method and apparatus for wideband predistortion linearization
PCT/SE1998/002439 WO1999033170A1 (en) 1997-12-22 1998-12-22 Method and apparatus for wideband predistortion linearization

Publications (1)

Publication Number Publication Date
EE200000371A true EE200000371A (et) 2001-10-15

Family

ID=25542081

Family Applications (1)

Application Number Title Priority Date Filing Date
EEP200000371A EE200000371A (et) 1997-12-22 1998-12-22 Meetod ja seade eelmoonutuse lineariseerimiseks laias sagedusvahemikus

Country Status (12)

Country Link
US (1) US6075411A (et)
EP (1) EP1042864B1 (et)
JP (1) JP4279453B2 (et)
KR (1) KR100535273B1 (et)
CN (1) CN1203611C (et)
AR (1) AR015506A1 (et)
AU (1) AU752058B2 (et)
DE (1) DE69832198D1 (et)
EE (1) EE200000371A (et)
ID (1) ID25667A (et)
TW (1) TW399364B (et)
WO (1) WO1999033170A1 (et)

Families Citing this family (98)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6285412B1 (en) * 1997-07-23 2001-09-04 Harris Corporation Adaptive pre-equalization apparatus for correcting linear distortion of a non-ideal data transmission system
FI105506B (fi) * 1998-04-30 2000-08-31 Nokia Networks Oy Vahvistimen linearisointimenetelmä ja vahvistinjärjestely
US6381212B1 (en) * 1998-06-17 2002-04-30 Radio Frequency Systems, Inc. Power sharing amplifier system for amplifying multiple input signals with shared power amplifiers
US6519010B2 (en) 1998-06-26 2003-02-11 Harris Corporation Broadcast transmission system with sampling and correction arrangement for correcting distortion caused by amplifying and signal conditioning components
KR100326176B1 (ko) * 1998-08-06 2002-04-17 윤종용 이동통신시스템의전력증폭장치및방법
US6104761A (en) * 1998-08-28 2000-08-15 Sicom, Inc. Constrained-envelope digital-communications transmission system and method therefor
JP3772031B2 (ja) * 1998-09-02 2006-05-10 富士通株式会社 増幅器のプリディストータと増幅装置
US6236864B1 (en) * 1998-11-27 2001-05-22 Nortel Networks Limited CDMA transmit peak power reduction
ES2247737T3 (es) * 1998-12-24 2006-03-01 Nokia Corporation Transmisor multifrecuencia que usa la predistorsion y metodo de transmision.
DE69940998D1 (de) * 1999-06-30 2009-07-30 Alcatel Lucent Verfahren zur breitbandigen Linearisierung von Leistungsverstärkern
GB2354126B (en) * 1999-09-13 2004-07-21 Wireless Systems Int Ltd Signal processing
US7409007B1 (en) 1999-09-14 2008-08-05 Lucent Technologies Inc. Method and apparatus for reducing adjacent channel power in wireless communication systems
GB9926886D0 (en) * 1999-11-12 2000-01-12 Nokia Networks Oy Linerisation of an amplifier
KR100625445B1 (ko) * 1999-12-20 2006-09-18 주식회사 케이티 가변차수 전치왜곡장치 및 그의 제어 방법
KR100674586B1 (ko) * 1999-12-30 2007-01-25 엘지전자 주식회사 전력증폭기의 전치왜곡 선형화기
US6831954B1 (en) * 2000-02-01 2004-12-14 Nokia Corporation Apparatus, and associated method, for compensating for distortion introduced upon a send signal by an amplifier
US6731693B1 (en) * 2000-02-29 2004-05-04 Skyworks Solutions, Inc. System of and method for compensating a baseband signal to reduce third order modulation distortion
US6429740B1 (en) * 2000-03-23 2002-08-06 The Aerospace Corporation High power amplifier linearization method using extended saleh model predistortion
GB0011326D0 (en) * 2000-05-11 2000-06-28 Nortel Networks Corp A linear amplifier arrangement
US6489846B2 (en) * 2000-05-25 2002-12-03 Sony Corporation Distortion compensating device and distortion compensating method
US6963603B1 (en) 2000-06-06 2005-11-08 Ikanos Communication, Inc. Method and apparatus for pre-compensation of an XDSL modem
US6934341B2 (en) * 2000-08-29 2005-08-23 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for plurality signal generation
JP3590571B2 (ja) 2000-08-30 2004-11-17 株式会社日立国際電気 歪補償装置
US6324383B1 (en) * 2000-09-29 2001-11-27 Trw Inc. Radio transmitter distortion reducing techniques
EP1220443B1 (en) * 2000-12-28 2011-06-15 Alcatel Lucent xDSL class C-AB driver
US20020146996A1 (en) * 2001-03-06 2002-10-10 Bachman Thomas A. Scanning receiver for use in power amplifier linearization
US6829471B2 (en) * 2001-03-07 2004-12-07 Andrew Corporation Digital baseband receiver in a multi-carrier power amplifier
US6940919B2 (en) * 2001-04-16 2005-09-06 Northrop Grumman Corporation Bandpass predistortion method and apparatus for radio transmission
US20020171485A1 (en) * 2001-05-18 2002-11-21 Spectrian Corporation Digitally implemented predistorter control mechanism for linearizing high efficiency RF power amplifiers
US6462617B1 (en) * 2001-06-08 2002-10-08 Lucent Technologies Inc. Method and apparatus for calculating the predistortion function from a power amplifier model
US6683495B2 (en) * 2001-06-28 2004-01-27 Simon Fraser University Reduced architecture for multibranch feedforward power amplifier linearizers
US6734731B2 (en) * 2001-06-28 2004-05-11 Simon Fraser University Self-calibrated power amplifier linearizers
US7015751B2 (en) 2001-06-28 2006-03-21 Simon Fraser University Decorrelated power amplifier linearizers
US6999522B2 (en) 2001-09-28 2006-02-14 Intersil Americas, Inc. Constrained-envelope digital communications transmitter and method therefor
US6750709B2 (en) * 2001-11-30 2004-06-15 The Boeing Company Bipolar transistor-based linearizer with programmable gain and phase response system
US6856275B1 (en) * 2001-12-26 2005-02-15 Raytheon Company Semiconductor article harmonic identification
EP1466408B1 (en) * 2002-01-18 2006-07-05 Siemens Aktiengesellschaft Improvements in or relating to power amplifiers
US7248642B1 (en) 2002-02-05 2007-07-24 Andrew Corporation Frequency-dependent phase pre-distortion for reducing spurious emissions in communication networks
US7362821B1 (en) 2002-05-22 2008-04-22 Marvel International Ltd. Method and apparatus for amplifier linearization using adaptive predistortion
US7085330B1 (en) 2002-02-15 2006-08-01 Marvell International Ltd. Method and apparatus for amplifier linearization using adaptive predistortion
US7266159B2 (en) * 2002-03-08 2007-09-04 Andrew Corporation Frequency-dependent magnitude pre-distortion on non-baseband input signals for reducing spurious emissions in communication networks
US7197085B1 (en) * 2002-03-08 2007-03-27 Andrew Corporation Frequency-dependent magnitude pre-distortion for reducing spurious emissions in communication networks
DE60333421D1 (de) * 2002-03-26 2010-09-02 Ca Minister Industry Adaptiver vorverzerrer basierend auf der wahrscheie
US6812786B2 (en) 2002-04-11 2004-11-02 Andrew Corporation Zero-bias bypass switching circuit using mismatched 90 degrees hybrid
US6700439B2 (en) 2002-04-11 2004-03-02 Andrew Corporation Zero-bias bypass switch
US6680649B2 (en) 2002-06-07 2004-01-20 Telefonaktiebolaget Lm Ericsson (Publ) Coordinate rotation of pre-distortion vector in feedforward linearization amplification system
US6734733B2 (en) 2002-06-07 2004-05-11 Telefonaktiebolaget Lm Ericsson (Publ) Auxiliary amplifier in feedforward linearization amplification system
US7139327B2 (en) * 2002-06-10 2006-11-21 Andrew Corporation Digital pre-distortion of input signals for reducing spurious emissions in communication networks
US7333561B2 (en) * 2002-06-28 2008-02-19 Motorola, Inc. Postdistortion amplifier with predistorted postdistortion
US7209715B2 (en) * 2002-07-30 2007-04-24 Matsushita Electric Industrial Co., Ltd. Power amplifying method, power amplifier, and communication apparatus
US6642786B1 (en) * 2002-08-15 2003-11-04 Electronics And Telecommunications Research Institute Piecewise polynomial predistortion method and apparatus for compensating nonlinear distortion of high power amplifier
EP1573993B1 (en) * 2002-10-31 2010-01-13 ZTE Corporation A method and system for broadband predistortion linearizaion
FR2846813B1 (fr) * 2002-11-05 2005-01-28 Eads Defence & Security Ntwk Procede et dispositif d'apprentissage d'un dispositif de linearisation d'un amplificateur rf, et terminal mobile incorporant un tel dispositif
FR2846812B1 (fr) * 2002-11-05 2005-01-28 Eads Defence & Security Ntwk Perfectionnement aux procedes et dispositifs d'apprentissage d'un dispositif de linearisation d'un amplificateur rf
US7403573B2 (en) * 2003-01-15 2008-07-22 Andrew Corporation Uncorrelated adaptive predistorter
KR20040071556A (ko) * 2003-02-06 2004-08-12 삼성전자주식회사 복소 벡터 곱셈을 이용하는 다항식형 전치보상기 및 방법
US7729668B2 (en) * 2003-04-03 2010-06-01 Andrew Llc Independence between paths that predistort for memory and memory-less distortion in power amplifiers
US7251293B2 (en) * 2003-06-27 2007-07-31 Andrew Corporation Digital pre-distortion for the linearization of power amplifiers with asymmetrical characteristics
US7259630B2 (en) 2003-07-23 2007-08-21 Andrew Corporation Elimination of peak clipping and improved efficiency for RF power amplifiers with a predistorter
US6963242B2 (en) * 2003-07-31 2005-11-08 Andrew Corporation Predistorter for phase modulated signals with low peak to average ratios
US7561635B2 (en) * 2003-08-05 2009-07-14 Stmicroelectronics Nv Variable coder apparatus for resonant power conversion and method
US7366252B2 (en) * 2004-01-21 2008-04-29 Powerwave Technologies, Inc. Wideband enhanced digital injection predistortion system and method
JP4255849B2 (ja) * 2004-01-29 2009-04-15 株式会社エヌ・ティ・ティ・ドコモ べき級数型ディジタルプリディストータ
US7336725B2 (en) * 2004-03-03 2008-02-26 Powerwave Technologies, Inc. Digital predistortion system and method for high efficiency transmitters
JP2005267970A (ja) * 2004-03-17 2005-09-29 Japan Aviation Electronics Industry Ltd コネクタ
US7385447B1 (en) 2004-06-28 2008-06-10 Anadigics, Inc. Power amplifier having curve-fitting predistorter
US7379711B2 (en) * 2004-07-30 2008-05-27 Paratek Microwave, Inc. Method and apparatus capable of mitigating third order inter-modulation distortion in electronic circuits
US20060039498A1 (en) * 2004-08-19 2006-02-23 De Figueiredo Rui J P Pre-distorter for orthogonal frequency division multiplexing systems and method of operating the same
CN100512246C (zh) * 2004-12-03 2009-07-08 涛联电子科技有限公司 一种射频预失真线性化方法
US7193462B2 (en) * 2005-03-22 2007-03-20 Powerwave Technologies, Inc. RF power amplifier system employing an analog predistortion module using zero crossings
KR100735316B1 (ko) * 2005-06-29 2007-07-04 삼성전자주식회사 통신 시스템에서 신호 송신 시스템 및 방법
US7769103B2 (en) * 2005-09-15 2010-08-03 Powerwave Technologies, Inc. Amplifier system employing analog polynomial predistortion with sub-nyquist digital adaptation
US7680176B2 (en) * 2005-11-21 2010-03-16 Telefonaktiebolaget Lm Ericsson (Publ) Simplified generalized rake receiver method and apparatus
US7675982B2 (en) * 2005-11-28 2010-03-09 Mitsubishi Electric Research Laboratories, Inc. Method and system for reducing peak-to-average power for OFDM signals
JP4750592B2 (ja) * 2006-03-17 2011-08-17 富士通株式会社 ピーク抑圧方法、ピーク抑圧装置、無線送信装置
DE102006020830B4 (de) * 2006-05-04 2014-02-13 Siemens Aktiengesellschaft Regler für einen Hochfrequenzverstärker
FI20075411L (fi) * 2006-06-04 2007-12-05 Samsung Electro Mech Järjestelmät, menetelmät ja laitteet monitie-ortogonaalista rekursiivista esivääristymää varten
WO2008070321A2 (en) * 2006-10-24 2008-06-12 Teetzel Andrew M Rf system linearizer using controlled complex nonlinear distortion generators
JP4480711B2 (ja) * 2006-12-13 2010-06-16 富士通株式会社 適応制御装置
FR2915642B1 (fr) * 2007-04-25 2009-07-10 Eads Secure Networks Soc Par A Linearisation dans une chaine d'emission
US8073340B2 (en) 2008-02-05 2011-12-06 Applied Optoelectronics, Inc. Distortion compensation circuit including one or more phase invertible distortion paths
US8848824B2 (en) * 2008-03-07 2014-09-30 Andrew M. Teetzel High efficiency RF system linearizer using controlled complex nonlinear distortion generators
DE102008052172B4 (de) 2008-10-17 2014-01-23 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vorrichtung zum Erzeugen eines Korrektursignals
US8706062B1 (en) * 2008-12-19 2014-04-22 Scintera Networks, Inc. Self-adaptive power amplification
US8498591B1 (en) 2009-08-21 2013-07-30 Marvell International Ltd. Digital Predistortion for nonlinear RF power amplifiers
US8699620B1 (en) 2010-04-16 2014-04-15 Marvell International Ltd. Digital Predistortion for nonlinear RF power amplifiers
TWI407686B (zh) * 2010-06-11 2013-09-01 Realtek Semiconductor Corp 應用於功率放大器之補償裝置、決定功率放大器之預失真值的方法以及補償功率放大器之線性度的方法
US8606116B2 (en) * 2011-01-13 2013-12-10 Applied Optoelectronics, Inc. System and method for distortion compensation in response to frequency detection
US8711976B2 (en) 2011-05-12 2014-04-29 Andrew Llc Pre-distortion architecture for compensating non-linear effects
CN105164986A (zh) * 2012-10-16 2015-12-16 诺基亚通信公司 极高阶im校正技术
US9160586B1 (en) 2013-07-24 2015-10-13 Marvell International Ltd. Method and apparatus for estimating and compensating for in-phase and quadrature (IQ) mismatch in a receiver of a wireless communication device
US9628030B1 (en) * 2014-06-05 2017-04-18 Meteorcomm Llc Systems and methods using digital predistortion to linearize radio transmitter operation
DE102014119625A1 (de) * 2014-12-23 2016-06-23 Intel IP Corporation Schaltung und Verfahren zum Bereitstellen eines Radiofrequenzsignals
US10122391B2 (en) * 2015-09-30 2018-11-06 Apple Inc. Radio frequency systems and methods for polar phase distortion calibration
US10382073B2 (en) * 2015-11-03 2019-08-13 Infineon Technologies Ag Analog RF pre-distorter and non-linear splitter
FR3066858B1 (fr) * 2017-05-23 2019-06-21 Soitec Procede pour minimiser une distorsion d'un signal dans un circuit radiofrequence
EP4169159B1 (en) * 2020-06-22 2025-09-24 Telefonaktiebolaget LM ERICSSON (PUBL) Transmitter circuit
US20230179468A1 (en) * 2021-12-06 2023-06-08 Sumitomo Electric Device Innovations, Inc. Dual-layered predistortion system for wireless communication

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4465980A (en) * 1982-09-23 1984-08-14 Rca Corporation Predistortion circuit for a power amplifier
US4554514A (en) * 1984-12-21 1985-11-19 Rca Corporation Predistortion circuit with feedback
US4885551A (en) * 1988-10-31 1989-12-05 American Telephone And Telegraph Company At&T Bell Laboratories Feed forward linear amplifier
FR2642243B1 (fr) * 1989-01-24 1991-04-19 Labo Electronique Physique Circuit de predistorsion adaptative
FR2644638B1 (et) * 1989-03-14 1991-05-31 Labo Electronique Physique
US5193224A (en) * 1991-04-24 1993-03-09 Northern Telecom Limited Adaptive phase control for a power amplifier predistorter
KR940011023B1 (ko) * 1992-07-21 1994-11-22 대우전자 주식회사 분산형 증폭기
US5486789A (en) * 1995-02-28 1996-01-23 Motorola, Inc. Apparatus and method for providing a baseband digital error signal in an adaptive predistorter
US5748678A (en) * 1995-07-13 1998-05-05 Motorola, Inc. Radio communications apparatus
KR100217416B1 (ko) * 1995-11-16 1999-09-01 윤종용 선형 증폭 장치 및 방법
US5650758A (en) * 1995-11-28 1997-07-22 Radio Frequency Systems, Inc. Pipelined digital predistorter for a wideband amplifier
US5892397A (en) * 1996-03-29 1999-04-06 Spectrian Adaptive compensation of RF amplifier distortion by injecting predistortion signal derived from respectively different functions of input signal amplitude
US5760646A (en) * 1996-03-29 1998-06-02 Spectrian Feed-forward correction loop with adaptive predistortion injection for linearization of RF power amplifier
FR2752313B1 (fr) * 1996-08-07 1998-11-13 Alcatel Telspace Procede et dispositif de modelisation des caracteristiques am/am et am/pm d'un amplificateur, et procede de predistorsion correspondant
US5862460A (en) * 1996-09-13 1999-01-19 Motorola, Inc. Power control circuit for a radio frequency transmitter

Also Published As

Publication number Publication date
AU1994199A (en) 1999-07-12
WO1999033170A1 (en) 1999-07-01
AU752058B2 (en) 2002-09-05
KR20010033417A (ko) 2001-04-25
ID25667A (id) 2000-10-19
JP2001527312A (ja) 2001-12-25
CN1203611C (zh) 2005-05-25
TW399364B (en) 2000-07-21
US6075411A (en) 2000-06-13
KR100535273B1 (ko) 2005-12-09
CN1285089A (zh) 2001-02-21
JP4279453B2 (ja) 2009-06-17
EP1042864A1 (en) 2000-10-11
EP1042864B1 (en) 2005-11-02
AR015506A1 (es) 2001-05-02
DE69832198D1 (de) 2005-12-08

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