WO2001008295A8 - Predistortion amplifier system with separately controllable amplifiers - Google Patents

Predistortion amplifier system with separately controllable amplifiers

Info

Publication number
WO2001008295A8
WO2001008295A8 PCT/IB2000/001044 IB0001044W WO0108295A8 WO 2001008295 A8 WO2001008295 A8 WO 2001008295A8 IB 0001044 W IB0001044 W IB 0001044W WO 0108295 A8 WO0108295 A8 WO 0108295A8
Authority
WO
WIPO (PCT)
Prior art keywords
data structure
compensation
sets
signal
acpce
Prior art date
Application number
PCT/IB2000/001044
Other languages
French (fr)
Other versions
WO2001008295A1 (en
Inventor
Steven J Bennett
Chun Kevin Y Hung
Bartholomeu Klijsen
Andrew S Wright
Paul V Yee
Original Assignee
Pmc Sierra Inc
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 Pmc Sierra Inc filed Critical Pmc Sierra Inc
Priority to AU60093/00A priority Critical patent/AU6009300A/en
Priority to EP00946223A priority patent/EP1196986A2/en
Publication of WO2001008295A1 publication Critical patent/WO2001008295A1/en
Publication of WO2001008295A8 publication Critical patent/WO2001008295A8/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/68—Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
    • 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
    • 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
    • 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
    • H03F1/3294—Acting on the real and imaginary components of the input signal
    • 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
    • H03F2201/3233—Adaptive predistortion using lookup table, e.g. memory, RAM, ROM, LUT, to generate the predistortion

Abstract

A predistortion system comprises a digital compensation signal processing component (DCSP) (52) which predistorts a wideband input transmission signal to compensate for the frequency and time dependent AM-AM and AM-PM distortion characteristics of a non-linear amplifier (64). The DCSP (52) comprises a data structure (52H) in which each element stores a set of compensation parameters (preferably including FIR filter coefficients) for predistorting the input transmission signal. The parameter sets are preferably indexed within the data structure (52H) according to multiple signal characteristics, such as instantaneous amplitude and integrated signal envelope, each of which corresponds to a respective dimension of the data structure (52H). The sets of compensation parameters are generated periodically and written to the data structure (52H) by an adaptive control processing and compensation estimator (ACPCE) (70) that performs a non-real-time analysis of amplifier input and output signals. The ACPCE (70) also implements various system identification processes for measuring the characteristics of the power amplifier (64) and generating initial sets of filter coefficients.
PCT/IB2000/001044 1999-07-13 2000-07-13 Predistortion amplifier system with separately controllable amplifiers WO2001008295A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU60093/00A AU6009300A (en) 1999-07-13 2000-07-13 Predistortion amplifier system with separately controllable amplifiers
EP00946223A EP1196986A2 (en) 1999-07-13 2000-07-13 Redistortion amplifier system with separately controllable amplifiers

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US14357099P 1999-07-13 1999-07-13
US60/143,570 1999-07-13
US09/597,915 US6342810B1 (en) 1999-07-13 2000-06-19 Predistortion amplifier system with separately controllable amplifiers
US09/597,915 2000-06-19

Publications (2)

Publication Number Publication Date
WO2001008295A1 WO2001008295A1 (en) 2001-02-01
WO2001008295A8 true WO2001008295A8 (en) 2001-11-08

Family

ID=26841180

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2000/001044 WO2001008295A1 (en) 1999-07-13 2000-07-13 Predistortion amplifier system with separately controllable amplifiers

Country Status (4)

Country Link
US (1) US6342810B1 (en)
EP (1) EP1196986A2 (en)
AU (1) AU6009300A (en)
WO (1) WO2001008295A1 (en)

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Also Published As

Publication number Publication date
AU6009300A (en) 2001-02-13
EP1196986A2 (en) 2002-04-17
US6342810B1 (en) 2002-01-29
WO2001008295A1 (en) 2001-02-01

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