AU2002223383A1 - Method and apparatus for adaptive digital predistortion in radio transmitter - Google Patents

Method and apparatus for adaptive digital predistortion in radio transmitter

Info

Publication number
AU2002223383A1
AU2002223383A1 AU2002223383A AU2338302A AU2002223383A1 AU 2002223383 A1 AU2002223383 A1 AU 2002223383A1 AU 2002223383 A AU2002223383 A AU 2002223383A AU 2338302 A AU2338302 A AU 2338302A AU 2002223383 A1 AU2002223383 A1 AU 2002223383A1
Authority
AU
Australia
Prior art keywords
signals
transmitting
digital
digital predistortion
predistortion
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.)
Abandoned
Application number
AU2002223383A
Inventor
Honghui Yan
Zhengjun Yang
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.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
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 Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of AU2002223383A1 publication Critical patent/AU2002223383A1/en
Abandoned 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
    • H03F1/3241—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

Abstract

An adaptive digital predistortion apparatus and method for transmitting broadband digital signals from a wireless transmitter to a transmitting channel are provided. In the adaptive digital predistortion process, a non-linearity conversion opposite to the transmitting channel characteristic is performed by a digital predistorter for input baseband signals. The predistorted signals are amplified by a power amplifier via an up conversion channel. A part of the signals outputted from the power amplifier are fed back to an adaptive controller via a coupler. The feedback signals are processed by the adaptive controller to obtain out-of-band emission energy of the feedback signals. Using the out-of-band emission energy as a target function, the predistortion parameters are updated by employing a multi-parameter optimum seeking module. Accordingly, broadband signals to be transmitted are predistorted by the digital predistortion system to cancel out the non-linear characteristic of the transmitting channels, and to suppress the out-of-band emission energy of the outputting signals. Meanwhile, by using a multi-parameter optimization seeking module, the predistortion parameters are adjusted adaptively by the digital predistortion system based on the slow variation of non-linearity of the transmitting channels. <IMAGE>
AU2002223383A 2000-07-20 2001-07-20 Method and apparatus for adaptive digital predistortion in radio transmitter Abandoned AU2002223383A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN00119493 2000-07-20
CNB001194933A CN1166138C (en) 2000-07-20 2000-07-20 Adaptive digital pre-distortion method and device for wideband transmitter
PCT/CN2001/001186 WO2002011379A1 (en) 2000-07-20 2001-07-20 Method and apparatus for adaptive digital predistortion in a radio transmitter

Publications (1)

Publication Number Publication Date
AU2002223383A1 true AU2002223383A1 (en) 2002-02-13

Family

ID=4587737

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2002223383A Abandoned AU2002223383A1 (en) 2000-07-20 2001-07-20 Method and apparatus for adaptive digital predistortion in radio transmitter

Country Status (7)

Country Link
US (1) US7136628B2 (en)
EP (1) EP1313278B1 (en)
CN (1) CN1166138C (en)
AT (1) ATE546934T1 (en)
AU (1) AU2002223383A1 (en)
RU (1) RU2264037C2 (en)
WO (1) WO2002011379A1 (en)

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Also Published As

Publication number Publication date
EP1313278A4 (en) 2007-11-07
CN1335699A (en) 2002-02-13
US7136628B2 (en) 2006-11-14
ATE546934T1 (en) 2012-03-15
WO2002011379A1 (en) 2002-02-07
US20030104794A1 (en) 2003-06-05
EP1313278B1 (en) 2012-02-22
WO2002011379A8 (en) 2002-05-23
RU2264037C2 (en) 2005-11-10
CN1166138C (en) 2004-09-08
EP1313278A1 (en) 2003-05-21

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