NO993128L - Adaptive distortion system - Google Patents

Adaptive distortion system

Info

Publication number
NO993128L
NO993128L NO993128A NO993128A NO993128L NO 993128 L NO993128 L NO 993128L NO 993128 A NO993128 A NO 993128A NO 993128 A NO993128 A NO 993128A NO 993128 L NO993128 L NO 993128L
Authority
NO
Norway
Prior art keywords
distortion
receiver
transmitter
signal
analysis
Prior art date
Application number
NO993128A
Other languages
Norwegian (no)
Other versions
NO993128D0 (en
Inventor
Sheldon Salinger
Original Assignee
Gte Government Syst
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 Gte Government Syst filed Critical Gte Government Syst
Publication of NO993128D0 publication Critical patent/NO993128D0/en
Publication of NO993128L publication Critical patent/NO993128L/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Transmitters (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Amplifiers (AREA)

Abstract

Fremgangsmåter, apparatur og systemer for adaptiv forforvrengning av signaler på digital form før disse sendes ut fra en sender (12, 14, 16, 18). Forforvreng- ningen korrigerer innførte ulineariteter ved at statistisk informasjon tas ut fra de mottatte signaler i en mottaker (24) og sendes tilbake til senderen via en returkontrollkanal. Signalbehandlingen innbefatter såkalt konstellasjonsanalyse hvor signalets f orvrengningskarakteristikk bestemmes, og korreksjonen går inn på blant annet forspenninger, forsterknings- ubalanse, låse- og kvadraturvinkelfeil og ulineær forvrengning av typen omvandling AM-AM og AM-FM. Disse forvrengnings- og forstyrrelsesarter kan ligge både i sen- deren, mottakeren og i mediet mellom dem. Ut fra analysen reguleres parametere i senderen eller mottakeren eller i begge. Posisjonen av bestemte signalsymboler i den utsendte signalkonstellasjon korri- geres derved på forhånd slik at signal- kvaliteten i mottakeren blir best mulig.Methods, apparatus and systems for adaptive distortion of signals in digital form before they are emitted from a transmitter (12, 14, 16, 18). The distortion corrects introduced nonlinearities by extracting statistical information from the received signals in a receiver (24) and sending it back to the transmitter via a return control channel. The signal processing includes so-called constellation analysis in which the signal distortion characteristic is determined, and the correction includes bias, gain imbalance, lock and quadrature angle errors and non-linear distortion of the type AM-AM and AM-FM. These distortion and disturbance types can lie both in the transmitter, the receiver and in the medium between them. Based on the analysis, parameters are regulated in the transmitter or receiver or in both. The position of certain signal symbols in the transmitted signal constellation is thereby corrected in advance so that the signal quality in the receiver is as good as possible.

NO993128A 1996-12-24 1999-06-23 Adaptive distortion system NO993128L (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US77414396A 1996-12-24 1996-12-24
PCT/US1997/024194 WO1998028888A1 (en) 1996-12-24 1997-12-24 Adaptive predistortion system

Publications (2)

Publication Number Publication Date
NO993128D0 NO993128D0 (en) 1999-06-23
NO993128L true NO993128L (en) 1999-08-20

Family

ID=25100366

Family Applications (1)

Application Number Title Priority Date Filing Date
NO993128A NO993128L (en) 1996-12-24 1999-06-23 Adaptive distortion system

Country Status (8)

Country Link
EP (1) EP0951769A1 (en)
JP (1) JP3993640B2 (en)
KR (1) KR20000062279A (en)
AU (1) AU738870B2 (en)
CA (1) CA2274522A1 (en)
IL (1) IL130264A0 (en)
NO (1) NO993128L (en)
WO (1) WO1998028888A1 (en)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100379451B1 (en) * 1998-12-04 2003-09-19 엘지전자 주식회사 Digital Television Transmission System and Operation Method
KR100379452B1 (en) * 1999-07-31 2003-04-10 엘지전자 주식회사 Distortion Signal Compensation Method in Digital TV
KR100404182B1 (en) * 1999-08-14 2003-11-03 엘지전자 주식회사 Alarm system of Digital TV translator and Method for using the same
WO2001017303A1 (en) * 1999-08-30 2001-03-08 Robert Bosch Gmbh Method for transmitting signalling information, a master station, a mobile station and message elements
DE19942768B4 (en) 1999-08-30 2019-08-14 Ipcom Gmbh & Co. Kg Method for transmitting signaling information, transmitting station, mobile station and message elements
KR100379455B1 (en) * 1999-09-13 2003-04-10 엘지전자 주식회사 Apparatus and Method for compensate distortion of Transmitter in Digital TV Translator
KR20010060461A (en) * 1999-12-27 2001-07-07 서평원 Auto alarm method and apparatus for digital broadcasting system
KR20010059728A (en) * 1999-12-30 2001-07-06 서평원 VSB auto corrector
GB0004125D0 (en) * 2000-02-23 2000-04-12 Koninkl Philips Electronics Nv Communications system
KR20010113423A (en) * 2000-06-16 2001-12-28 최승국 Compensation of nonlinear distortion in OFDM systems with high power amplifier
GB2375016B (en) 2001-04-27 2005-03-16 Tandberg Television Asa Satellite up-link fade compensation
GB2376611A (en) * 2001-06-14 2002-12-18 Tandberg Television Asa Method of adjusting received constellation points
ITMI20011631A1 (en) * 2001-07-27 2003-01-27 Siemens Inf & Comm Networks PROCEDURE FOR THE LINEARIZATION OF THE POWER STAGE OF A SYSTEM AND RECEIVER SIGNAL TRANSMITTER
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
AU2003213930A1 (en) 2002-03-26 2003-10-08 Her Majesty In Right Of Canada As Represented By The Minister Of Industry Adaptive predistorter based on the probability distribution function of the output amplitude
EP1499012B1 (en) * 2003-07-17 2006-09-06 BenQ Corporation Method and apparatus for linearization of a power amplifier for mobile phones
JP4417174B2 (en) 2004-05-19 2010-02-17 株式会社日立国際電気 Predistorter
EP2117115B1 (en) 2008-05-06 2011-11-30 Nokia Siemens Networks S.p.A. Improvement to remote control methods of transmission signals adaptive predistortion
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
GB201302359D0 (en) 2013-02-11 2013-03-27 Newtec Cy Predistortion circuit and method for predistorting a signal
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
CN110785976B (en) 2017-07-03 2021-08-13 华为技术有限公司 Method and apparatus for quadrature amplitude modulation for phase noise optimization

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4291277A (en) * 1979-05-16 1981-09-22 Harris Corporation Adaptive predistortion technique for linearizing a power amplifier for digital data systems
FR2642243B1 (en) * 1989-01-24 1991-04-19 Labo Electronique Physique ADAPTIVE PREDISTORSION CIRCUIT
FR2644638B1 (en) * 1989-03-14 1991-05-31 Labo Electronique Physique
JP3166321B2 (en) * 1992-07-01 2001-05-14 日本電気株式会社 Modulated signal transmission system

Also Published As

Publication number Publication date
NO993128D0 (en) 1999-06-23
AU738870B2 (en) 2001-09-27
KR20000062279A (en) 2000-10-25
AU5728098A (en) 1998-07-17
EP0951769A1 (en) 1999-10-27
IL130264A0 (en) 2000-06-01
WO1998028888A1 (en) 1998-07-02
JP2001507196A (en) 2001-05-29
JP3993640B2 (en) 2007-10-17
CA2274522A1 (en) 1998-07-02

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