[go: up one dir, main page]

BR9102948A - Processo para a compensacao de nao-linearidades de um circuito de amplificacao,bem como disposicao para a amplificacao linear de sinais - Google Patents

Processo para a compensacao de nao-linearidades de um circuito de amplificacao,bem como disposicao para a amplificacao linear de sinais

Info

Publication number
BR9102948A
BR9102948A BR919102948A BR9102948A BR9102948A BR 9102948 A BR9102948 A BR 9102948A BR 919102948 A BR919102948 A BR 919102948A BR 9102948 A BR9102948 A BR 9102948A BR 9102948 A BR9102948 A BR 9102948A
Authority
BR
Brazil
Prior art keywords
amplification
nonlinearities
signs
compensation
provision
Prior art date
Application number
BR919102948A
Other languages
English (en)
Inventor
Narindra N Dr Puri
Hans U Boksberger
Original Assignee
Asea Brown Boveri
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 Asea Brown Boveri filed Critical Asea Brown Boveri
Publication of BR9102948A publication Critical patent/BR9102948A/pt

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
    • 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
    • H03F1/3252—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits using multiple parallel paths between input and output
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2201/00—Indexing scheme relating to details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements covered by H03F1/00
    • H03F2201/32—Indexing scheme relating to modifications of amplifiers to reduce non-linear distortion
    • H03F2201/3231—Adaptive predistortion using phase feedback from the output of the main amplifier

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
BR919102948A 1990-07-12 1991-07-11 Processo para a compensacao de nao-linearidades de um circuito de amplificacao,bem como disposicao para a amplificacao linear de sinais BR9102948A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP90113326A EP0465709A1 (de) 1990-07-12 1990-07-12 Verfahren zur Kompensation von Nichtlinearitäten einer Verstärkerschaltung

Publications (1)

Publication Number Publication Date
BR9102948A true BR9102948A (pt) 1992-02-11

Family

ID=8204210

Family Applications (1)

Application Number Title Priority Date Filing Date
BR919102948A BR9102948A (pt) 1990-07-12 1991-07-11 Processo para a compensacao de nao-linearidades de um circuito de amplificacao,bem como disposicao para a amplificacao linear de sinais

Country Status (12)

Country Link
US (1) US5164678A (pt)
EP (1) EP0465709A1 (pt)
JP (1) JPH04233810A (pt)
KR (1) KR920003626A (pt)
CN (1) CN1023173C (pt)
BR (1) BR9102948A (pt)
CA (1) CA2046457A1 (pt)
CS (1) CS210491A3 (pt)
HU (1) HUT60576A (pt)
PL (1) PL290991A1 (pt)
YU (1) YU120591A (pt)
ZA (1) ZA915313B (pt)

Families Citing this family (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5489879A (en) * 1995-02-16 1996-02-06 Seiko Communication Systems, Inc. Amplitude and phase error normalization of subcarrier generator
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
GB9804745D0 (en) * 1998-03-06 1998-04-29 Wireless Systems Int Ltd Predistorter
GB9804835D0 (en) * 1998-03-06 1998-04-29 Wireless Systems Int Ltd Predistorter
US6046635A (en) * 1998-04-08 2000-04-04 Powerwave Technologies, Inc. Dynamic predistortion compensation for a power amplifier
US6600792B2 (en) * 1998-06-26 2003-07-29 Qualcomm Incorporated Predistortion technique for high power amplifiers
US6236837B1 (en) 1998-07-30 2001-05-22 Motorola, Inc. Polynomial Predistortion linearizing device, method, phone and base station
US6240278B1 (en) 1998-07-30 2001-05-29 Motorola, Inc. Scalar cost function based predistortion linearizing device, method, phone and basestation
WO2000048308A1 (en) * 1999-02-12 2000-08-17 Wireless Systems International Limited Signal processing apparatus
EP1032121A1 (fr) * 1999-02-26 2000-08-30 Koninklijke Philips Electronics N.V. Appareil électronique comportant un amplificateur de puissance
CN1249913C (zh) 1999-05-28 2006-04-05 富士通株式会社 预失真类型的失真补偿放大设备
GB2351624B (en) * 1999-06-30 2003-12-03 Wireless Systems Int Ltd Reducing distortion of signals
EP1204216B1 (en) * 1999-07-28 2011-04-20 Fujitsu Limited Method and apparatus for distortion compensation of radio device
GB2354126B (en) * 1999-09-13 2004-07-21 Wireless Systems Int Ltd Signal processing
DE19962340B4 (de) * 1999-12-23 2005-11-03 Robert Bosch Gmbh Sender zum Versenden von Signalen über Funkkanäle und Verfahren zum Senden von Signalen über Funkkanäle
DE10009596A1 (de) * 2000-02-29 2001-08-30 Bosch Gmbh Robert Vorrichtung zur Linearisierung eines Hochfrequenz-Verstärkers
US6960956B2 (en) 2001-01-12 2005-11-01 Telefonatiebolaget L.M. Ericsson Telefonplan Apparatus and methods for monitoring and controlling power amplifier linearity using detected fundamental and harmonic components
JP3690988B2 (ja) * 2001-02-01 2005-08-31 株式会社日立国際電気 プリディストーション歪み補償装置
US6593806B1 (en) * 2001-08-10 2003-07-15 Cirrus Logic, Inc. Circuits and methods for compensating switched mode amplifiers
AU2003225815A1 (en) * 2002-03-19 2003-10-08 Powerwave Technologies, Inc. System and method for eliminating signal zero crossings in single and multiple channel communication systems
US7149482B2 (en) * 2003-09-16 2006-12-12 Andrew Corporation Compensation of filters in radio transmitters
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
JP4417174B2 (ja) 2004-05-19 2010-02-17 株式会社日立国際電気 プリディストータ
US7355470B2 (en) 2006-04-24 2008-04-08 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including embodiments for amplifier class transitioning
US7327803B2 (en) 2004-10-22 2008-02-05 Parkervision, Inc. Systems and methods for vector power amplification
US8334722B2 (en) 2007-06-28 2012-12-18 Parkervision, Inc. Systems and methods of RF power transmission, modulation and amplification
US7911272B2 (en) 2007-06-19 2011-03-22 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including blended control embodiments
US20130078934A1 (en) 2011-04-08 2013-03-28 Gregory Rawlins Systems and Methods of RF Power Transmission, Modulation, and Amplification
US8031804B2 (en) 2006-04-24 2011-10-04 Parkervision, Inc. Systems and methods of RF tower transmission, modulation, and amplification, including embodiments for compensating for waveform distortion
US7937106B2 (en) 2006-04-24 2011-05-03 ParkerVision, Inc, Systems and methods of RF power transmission, modulation, and amplification, including architectural embodiments of same
US7620129B2 (en) 2007-01-16 2009-11-17 Parkervision, Inc. RF power transmission, modulation, and amplification, including embodiments for generating vector modulation control signals
WO2008144017A1 (en) 2007-05-18 2008-11-27 Parkervision, Inc. Systems and methods of rf power transmission, modulation, and amplification
WO2008156800A1 (en) 2007-06-19 2008-12-24 Parkervision, Inc. Combiner-less multiple input single output (miso) amplification with blended control
DE102007028695A1 (de) 2007-06-21 2009-01-02 Kathrein-Austria Ges.M.B.H. Verfahren und Vorrichtung zur Erzeugung eines amplituden-modulierten Signals
WO2009145887A1 (en) 2008-05-27 2009-12-03 Parkervision, Inc. Systems and methods of rf power transmission, modulation, and amplification
CN101505139B (zh) * 2008-11-17 2011-08-17 深圳市云海通讯股份有限公司 一种数字线性预畸变方法和系统
WO2012066382A1 (en) * 2010-11-16 2012-05-24 Telefonaktiebolaget Lm Ericsson (Publ) Non-linear model with tap output normalization
US20120195392A1 (en) * 2011-02-02 2012-08-02 Provigent Ltd. Predistortion in split-mount wireless communication systems
JP6174574B2 (ja) 2011-06-02 2017-08-02 パーカーヴィジョン インコーポレイテッド アンテナ制御
US8615204B2 (en) * 2011-08-26 2013-12-24 Qualcomm Incorporated Adaptive interference cancellation for transmitter distortion calibration in multi-antenna transmitters
EP3047348B1 (en) 2013-09-17 2025-03-19 Parkervision, Inc. Method for rendering an information bearing function of time
JP6569174B2 (ja) * 2015-02-06 2019-09-04 日本無線株式会社 前置歪み生成装置及び前置歪み生成方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58105658A (ja) * 1981-12-17 1983-06-23 Nec Corp 適応型変調装置
DE3221911C1 (de) * 1982-06-11 1983-11-17 Standard Elektrik Lorenz Ag, 7000 Stuttgart Hochfrequenzleistungsverstaerker mit einer Modulationseinrichtung
US4700151A (en) * 1985-03-20 1987-10-13 Nec Corporation Modulation system capable of improving a transmission system
DE3522408A1 (de) * 1985-06-22 1987-01-02 Ant Nachrichtentech Arbeitspunktstabilisierter linearisierter wanderfeldroehrenverstaerker
DE3614785A1 (de) * 1986-05-02 1988-01-21 Rohde & Schwarz Hilfssystem zur entzerrung frequenzabhaengiger nichtlinearer systeme insbesondere verstaerker
FR2637431B1 (fr) * 1988-09-30 1990-11-09 Labo Electronique Physique Circuit de predistorsion adaptative
US5049832A (en) * 1990-04-20 1991-09-17 Simon Fraser University Amplifier linearization by adaptive predistortion

Also Published As

Publication number Publication date
PL290991A1 (en) 1992-08-10
JPH04233810A (ja) 1992-08-21
EP0465709A1 (de) 1992-01-15
CA2046457A1 (en) 1992-01-13
KR920003626A (ko) 1992-02-29
HU912340D0 (en) 1991-12-30
CN1058122A (zh) 1992-01-22
CS210491A3 (en) 1992-02-19
US5164678A (en) 1992-11-17
ZA915313B (en) 1992-03-25
CN1023173C (zh) 1993-12-15
HUT60576A (en) 1992-09-28
YU120591A (sh) 1994-06-10

Similar Documents

Publication Publication Date Title
BR9102948A (pt) Processo para a compensacao de nao-linearidades de um circuito de amplificacao,bem como disposicao para a amplificacao linear de sinais
BR9402363A (pt) Processo para preparação de um composto bem como composto
BR9005370A (pt) Processo de fabricacao de embolo refrigerado
FI914608A0 (fi) Databehandlingsanordning foer att dynamiskt saetta tidsanpassningar i ett dynamiskt minnessystem.
FI902263A7 (fi) Temperaturkompensation i en helix-resonator.
DE69117331D1 (de) Elektronischer Tabellenkalkulator
FI920695A0 (fi) I ett elektroniskt saekerhetssystem anvaendbar aktiverande/deaktiverande saekerhetsmaerklapp.
FI915045A0 (fi) Frekvenskompensering i ett digitalt radiosystem.
FI904623L (fi) Foerfarande foer att belaegga ett dielektriskt keramiskt stycke.
IT9020460A0 (it) circuito di precarico
FI911489A7 (fi) Ett i avdelningar indelat provroer foer kroppsvaetskor.
BR8604130A (pt) Processo para a obtencao de um polimero por blocos,bem como utilizacao de tal polimero
NO912744D0 (no) Fremgangsmaate ved lesing av kodetegn.
FI903690A0 (fi) Kopplingssystem foer att koppla tvao delar i ett fodral.
FI912176A0 (fi) Foerfarande foer att minska risken foer daolig mottagning i ett tidsmultiplext radiokommunikationssystem.
BR9705745A (pt) Processo para fabricação de uma ferradura bem como ferradura obtida pelo mesmo
BR9004669A (pt) Processo de geracao e de validacao de uma mensagem numerica de identificacao bem como dispositivo para o emprego do mesmo
DE69518520D1 (de) Lineare kondensatoren für hochtemperaturanwendungen
DE3870195D1 (de) Toleranzausgleichclips.
BR9100807A (pt) Processo de producao de alfa-olefinas lineares
NL188644C (nl) 1-(3,4-methyleendioxyfenyl)aminoalkanolen met farmacologisch bruikbare eigenschappen.
FI854011L (fi) Anordning foer att kvarhaolla en panel eller ett eljest jaemnt foeremaol pao en vaegg.
BR9202225A (pt) Processo para a producao de composicoes para calcados polimericas irradiadas com feixe de eletrons bem como artigos conformados
BR9104843A (pt) Processo biometalurgico
FI905678A0 (fi) Foerfarande foer att goera ett mellanskikt i ett pneumatiskt daeck.

Legal Events

Date Code Title Description
FD3 Appl. lapsed due to non-payment of renewal fee