WO2000036799A3 - Transmitter linearization - Google Patents

Transmitter linearization Download PDF

Info

Publication number
WO2000036799A3
WO2000036799A3 PCT/FI1999/001050 FI9901050W WO0036799A3 WO 2000036799 A3 WO2000036799 A3 WO 2000036799A3 FI 9901050 W FI9901050 W FI 9901050W WO 0036799 A3 WO0036799 A3 WO 0036799A3
Authority
WO
WIPO (PCT)
Prior art keywords
transmitter
linearization parameters
linearization
transmitted
parameters
Prior art date
Application number
PCT/FI1999/001050
Other languages
French (fr)
Other versions
WO2000036799A2 (en
Inventor
Mikko Huttunen
Original Assignee
Nokia Networks Oy
Mikko Huttunen
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 Nokia Networks Oy, Mikko Huttunen filed Critical Nokia Networks Oy
Priority to AU19859/00A priority Critical patent/AU1985900A/en
Publication of WO2000036799A2 publication Critical patent/WO2000036799A2/en
Publication of WO2000036799A3 publication Critical patent/WO2000036799A3/en

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/32Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/36Modulator circuits; Transmitter circuits
    • H04L27/366Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator
    • H04L27/367Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator using predistortion
    • H04L27/368Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator using predistortion adaptive predistortion
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03DDEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/16Multiple-frequency-changing
    • H03D7/165Multiple-frequency-changing at least two frequency changers being located in different paths, e.g. in two paths with carriers in quadrature
    • H03D7/166Multiple-frequency-changing at least two frequency changers being located in different paths, e.g. in two paths with carriers in quadrature using two or more quadrature frequency translation stages
    • H03D7/168Multiple-frequency-changing at least two frequency changers being located in different paths, e.g. in two paths with carriers in quadrature using two or more quadrature frequency translation stages using a feedback loop containing mixers or demodulators

Abstract

A method for updating linearization parameters of a transmitter predistorter and a transmitter, whereby linearization parameters are maintained in memory means (19, 20), information payload (I_IN, Q_IN) to be transmitted is predistorted by means of the linearization parameters in a predistorter (3A, 3B, 4), the predistorted information payload is transmitted from said transmitter to a radio path, whereby new linearization parameters are defined in definition means (17) during said transmission by means of said transmitted information payload (OUT) and the linearization parameters being used are replaced by the new linearization parameters.
PCT/FI1999/001050 1998-12-17 1999-12-16 Transmitter linearization WO2000036799A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU19859/00A AU1985900A (en) 1998-12-17 1999-12-16 Transmitter linearization

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI982739 1998-12-17
FI982739A FI982739A (en) 1998-12-17 1998-12-17 Transmitter linearization

Publications (2)

Publication Number Publication Date
WO2000036799A2 WO2000036799A2 (en) 2000-06-22
WO2000036799A3 true WO2000036799A3 (en) 2000-09-14

Family

ID=8553143

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1999/001050 WO2000036799A2 (en) 1998-12-17 1999-12-16 Transmitter linearization

Country Status (3)

Country Link
AU (1) AU1985900A (en)
FI (1) FI982739A (en)
WO (1) WO2000036799A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2377837A (en) * 2001-07-20 2003-01-22 Univ Bristol Mixer linearisation using frequency retranslation

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5093637A (en) * 1987-12-27 1992-03-03 Mitsubishi Denki Kabushiki Kaisha Modulation device with input signal modification for correction of amplifier nonlinearities
EP0658975A1 (en) * 1993-12-14 1995-06-21 ALCATEL ITALIA S.p.A. Baseband predistortion system for the adaptive linearization of power amplifiers
EP0731556A1 (en) * 1995-03-06 1996-09-11 NEC Corporation High-power linear amplification using periodically updated amplitude and phase correction values
EP0907276A1 (en) * 1997-06-30 1999-04-07 Harris Corporation Adaptive pre-distortion apparatus for linearizing an amplifier output within a data transmission system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5093637A (en) * 1987-12-27 1992-03-03 Mitsubishi Denki Kabushiki Kaisha Modulation device with input signal modification for correction of amplifier nonlinearities
EP0658975A1 (en) * 1993-12-14 1995-06-21 ALCATEL ITALIA S.p.A. Baseband predistortion system for the adaptive linearization of power amplifiers
EP0731556A1 (en) * 1995-03-06 1996-09-11 NEC Corporation High-power linear amplification using periodically updated amplitude and phase correction values
EP0907276A1 (en) * 1997-06-30 1999-04-07 Harris Corporation Adaptive pre-distortion apparatus for linearizing an amplifier output within a data transmission system

Also Published As

Publication number Publication date
FI982739A (en) 2000-06-18
WO2000036799A2 (en) 2000-06-22
AU1985900A (en) 2000-07-03
FI982739A0 (en) 1998-12-17

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