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AU2001282773A1 - Off-line mcpa calibration - Google Patents

Off-line mcpa calibration

Info

Publication number
AU2001282773A1
AU2001282773A1 AU2001282773A AU8277301A AU2001282773A1 AU 2001282773 A1 AU2001282773 A1 AU 2001282773A1 AU 2001282773 A AU2001282773 A AU 2001282773A AU 8277301 A AU8277301 A AU 8277301A AU 2001282773 A1 AU2001282773 A1 AU 2001282773A1
Authority
AU
Australia
Prior art keywords
power amplifier
spectrum
input
line
signal
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
AU2001282773A
Inventor
Bernt Johansson
Leonard Rexberg
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of AU2001282773A1 publication Critical patent/AU2001282773A1/en
Abandoned legal-status Critical Current

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
    • H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
    • H03F1/3258—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits based on polynomial terms
    • 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
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/02—Channels characterised by the type of signal
    • H04L5/06—Channels characterised by the type of signal the signals being represented by different frequencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • General Physics & Mathematics (AREA)
  • Algebra (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Amplifiers (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Measuring Volume Flow (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)

Abstract

A method is disclosed for obtaining high throughput linearity using a pre-distorter in front of a RF power amplifier, for instance a multi-carrier power amplifier (MCPA) for a communications system. The method can be carried out off-line to thereby save costs and components otherwise needed for a common on-line feed back. In a first step calibration is performed by measuring by an off-line spectrum analysis an output spectrum of the power amplifier and simultaneously applying a known input signal. As a next step digitized parameters characterizing the power amplifier are calculated in the frequency domain by comparing spectrum points between input spectrum and output spectrum. Thereafter calculated and weighted digitized parameters are transferred to a pre-distorting device. In a third step the known signal spectrum is transferred to the pre-distorting device feeding its output signal together with the original known signal spectrum to the power amplifier input thereby compensating for power amplifier non-linearity and minimizing inter-modulation products. Finally in a fourth step an uncompensated known input spectrum is compared with a corresponding compensated output spectrum of the power amplifier and the steps of calibration calculation are repeated until a best optimization input signal to the power amplifier regarding the inter-modulation products of the output signal has been achieved.
AU2001282773A 2000-09-07 2001-08-23 Off-line mcpa calibration Abandoned AU2001282773A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE0003071 2000-09-07
SE0003071A SE517456C2 (en) 2000-09-07 2000-09-07 MCPA calibration off-line
PCT/SE2001/001782 WO2002021683A1 (en) 2000-09-07 2001-08-23 Off-line mcpa calibration

Publications (1)

Publication Number Publication Date
AU2001282773A1 true AU2001282773A1 (en) 2002-03-22

Family

ID=20280841

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2001282773A Abandoned AU2001282773A1 (en) 2000-09-07 2001-08-23 Off-line mcpa calibration

Country Status (7)

Country Link
US (1) US6975688B2 (en)
EP (1) EP1316145B1 (en)
AT (1) ATE343246T1 (en)
AU (1) AU2001282773A1 (en)
DE (1) DE60123982D1 (en)
SE (1) SE517456C2 (en)
WO (1) WO2002021683A1 (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1351064A1 (en) 2002-04-06 2003-10-08 Agilent Technologies, Inc. - a Delaware corporation - Measuring apparatus comprising spectrum analyser and method therefor
US7801244B2 (en) * 2002-05-16 2010-09-21 Rf Micro Devices, Inc. Am to AM correction system for polar modulator
US7991071B2 (en) 2002-05-16 2011-08-02 Rf Micro Devices, Inc. AM to PM correction system for polar modulator
DE10320420B4 (en) * 2003-05-07 2005-05-25 Siemens Ag Arrangement and method for the digital predistortion of a complex baseband input signal
US7720171B2 (en) * 2003-06-13 2010-05-18 Alcatel-Lucent Usa Inc. Coefficient estimation method and apparatus
US7551686B1 (en) 2004-06-23 2009-06-23 Rf Micro Devices, Inc. Multiple polynomial digital predistortion
US7529523B1 (en) 2004-08-23 2009-05-05 Rf Micro Devices, Inc. N-th order curve fit for power calibration in a mobile terminal
US8224265B1 (en) 2005-06-13 2012-07-17 Rf Micro Devices, Inc. Method for optimizing AM/AM and AM/PM predistortion in a mobile terminal
US7877060B1 (en) 2006-02-06 2011-01-25 Rf Micro Devices, Inc. Fast calibration of AM/PM pre-distortion
US7962108B1 (en) 2006-03-29 2011-06-14 Rf Micro Devices, Inc. Adaptive AM/PM compensation
US7689182B1 (en) 2006-10-12 2010-03-30 Rf Micro Devices, Inc. Temperature compensated bias for AM/PM improvement
US8009762B1 (en) 2007-04-17 2011-08-30 Rf Micro Devices, Inc. Method for calibrating a phase distortion compensated polar modulated radio frequency transmitter
US8489042B1 (en) 2009-10-08 2013-07-16 Rf Micro Devices, Inc. Polar feedback linearization
CN103973250B (en) * 2014-04-23 2016-08-31 京信通信系统（中国）有限公司 DPD MCPA power amplifier gain-adaptive compensation method, system and device
JP6577615B2 (en) * 2018-03-02 2019-09-18 日本電信電話株式会社 Power amplifier adjustment method and adjustment system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2257860B (en) * 1991-07-06 1995-09-20 Racal Communications Syst Ltd Amplification systems
US5732333A (en) * 1996-02-14 1998-03-24 Glenayre Electronics, Inc. Linear transmitter using predistortion
US5937011A (en) * 1996-03-26 1999-08-10 Airnet Communications Corp. Multi-carrier high power amplifier using digital pre-distortion
US5959499A (en) * 1997-09-30 1999-09-28 Motorola, Inc. Predistortion system and method using analog feedback loop for look-up table training
US6600792B2 (en) * 1998-06-26 2003-07-29 Qualcomm Incorporated Predistortion technique for high power amplifiers
US6304140B1 (en) * 2000-06-12 2001-10-16 Motorola, Inc. Digital predistortion for amplifiers

Also Published As

Publication number Publication date
DE60123982D1 (en) 2006-11-30
SE517456C2 (en) 2002-06-11
EP1316145B1 (en) 2006-10-18
SE0003071L (en) 2002-03-08
EP1316145A1 (en) 2003-06-04
ATE343246T1 (en) 2006-11-15
SE0003071D0 (en) 2000-09-07
WO2002021683A1 (en) 2002-03-14
US6975688B2 (en) 2005-12-13
US20020027961A1 (en) 2002-03-07

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