BRPI0507137A - transmitter pre-distortion circuit and method for this - Google Patents

transmitter pre-distortion circuit and method for this

Info

Publication number
BRPI0507137A
BRPI0507137A BRPI0507137-2A BRPI0507137A BRPI0507137A BR PI0507137 A BRPI0507137 A BR PI0507137A BR PI0507137 A BRPI0507137 A BR PI0507137A BR PI0507137 A BRPI0507137 A BR PI0507137A
Authority
BR
Brazil
Prior art keywords
data stream
distortion
compensated
linear
transmitter
Prior art date
Application number
BRPI0507137-2A
Other languages
Portuguese (pt)
Inventor
Ronald D Mccallister
Original Assignee
Crestcom 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
Priority claimed from US10/766,768 external-priority patent/US20050163249A1/en
Priority claimed from US10/766,779 external-priority patent/US7430248B2/en
Priority claimed from US10/766,801 external-priority patent/US7099399B2/en
Priority claimed from US10/840,735 external-priority patent/US7342976B2/en
Priority claimed from US11/012,427 external-priority patent/US7469491B2/en
Application filed by Crestcom Inc filed Critical Crestcom Inc
Publication of BRPI0507137A publication Critical patent/BRPI0507137A/en

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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/165—A filter circuit coupled to the input of an amplifier
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/171—A filter circuit coupled to the output of an amplifier
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/336—A I/Q, i.e. phase quadrature, modulator or demodulator being used in an amplifying circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/451—Indexing scheme relating to amplifiers the amplifier being a radio frequency amplifier

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Amplifiers (AREA)

Abstract

CIRCUITO DE PRé-DISTORçãO DE TRANSMISOR E MéTODO PARA ISTO. Apresente invenção refere-se a transmissor de comunicações digital (100) que inclui uma seção de pré-distorção linear e não-linear digital (200,1800,2800) para compensação de uma distorção linear e não-linear introduzida pelos componentes de transmissor analógicos (120). Uma seção de conversão para baixo digital direta(300) gera um fluxo de dados de retorno complexo (254) a partir dos componentes analógicos (120), sem a introdução de um desequilíbrio de quadratura. Uma resolução relativamente baixa exbida pelo fluxo de dados de retorno (254) é efetivamente aumentada através de um processamento aritimético. A distorção introduzida por um conversor de analógico para digital (304) pode ser compensada usando-se uma varieade de técnicas adaptativas. A distorção linear é compensada usando-se técnicas adaptativas com um equalizador (246) posicionando no fluxo de dados para frente (112). Uma distorção não-linear então é compensada usando-se técnicas adaptativas com uma pluralidade de equalizadores (226) que filtram uma pluralidade de funções de base de ordem mais alta ortogonais (214) geradas a partir do fluxo de dados para frente (112). As funções de base filtaradas são combinadas em conjunto e substraídas do fluxo de dados para frente (112).TRANSMITTER PREDISTORTION CIRCUIT AND METHOD FOR THIS. The present invention relates to a digital communications transmitter (100) which includes a digital linear and nonlinear pre-distortion section (200,1800,2800) for compensating for linear and nonlinear distortion introduced by analog transmitter components. (120). A direct digital downconversion section (300) generates a complex return data stream (254) from analog components (120) without introducing a quadrature imbalance. The relatively low resolution outputted by the return data stream 254 is effectively increased by arithmetic processing. The distortion introduced by an analog-to-digital converter (304) can be compensated for using a variety of adaptive techniques. Linear distortion is compensated by using adaptive techniques with an equalizer (246) positioned in the forward data stream (112). Nonlinear distortion is then compensated by using adaptive techniques with a plurality of equalizers (226) that filter a plurality of orthogonal higher order base functions (214) generated from the forward data stream (112). Filtered base functions are combined together and subtracted from the forward data stream (112).

BRPI0507137-2A 2004-01-27 2005-01-24 transmitter pre-distortion circuit and method for this BRPI0507137A (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US10/766,768 US20050163249A1 (en) 2004-01-27 2004-01-27 Predistortion circuit and method for compensating linear distortion in a digital RF communications transmitter
US10/766,779 US7430248B2 (en) 2004-01-27 2004-01-27 Predistortion circuit and method for compensating nonlinear distortion in a digital RF communications transmitter
US10/766,801 US7099399B2 (en) 2004-01-27 2004-01-27 Distortion-managed digital RF communications transmitter and method therefor
US10/840,735 US7342976B2 (en) 2004-01-27 2004-05-06 Predistortion circuit and method for compensating A/D and other distortion in a digital RF communications transmitter
US11/012,427 US7469491B2 (en) 2004-01-27 2004-12-14 Transmitter predistortion circuit and method therefor
PCT/US2005/002316 WO2005074121A1 (en) 2004-01-27 2005-01-24 Transmitter predistortion circuit and method therefor

Publications (1)

Publication Number Publication Date
BRPI0507137A true BRPI0507137A (en) 2007-06-19

Family

ID=36955084

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0507137-2A BRPI0507137A (en) 2004-01-27 2005-01-24 transmitter pre-distortion circuit and method for this

Country Status (3)

Country Link
EP (1) EP1709729A4 (en)
BR (1) BRPI0507137A (en)
TW (1) TW200541280A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4793599B2 (en) 2008-11-18 2011-10-12 日本電気株式会社 OFDMA wireless communication apparatus and learning signal generation method for nonlinear distortion compensation by the wireless communication apparatus
TWI397270B (en) * 2009-05-22 2013-05-21 Hon Hai Prec Ind Co Ltd Rf front-end circuit
TWI554060B (en) * 2015-03-13 2016-10-11 瑞昱半導體股份有限公司 Transmitter and method for lowering signal distortion

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5903823A (en) * 1995-09-19 1999-05-11 Fujitsu Limited Radio apparatus with distortion compensating function
US5732333A (en) * 1996-02-14 1998-03-24 Glenayre Electronics, Inc. Linear transmitter using predistortion
US6081158A (en) * 1997-06-30 2000-06-27 Harris Corporation Adaptive pre-distortion apparatus for linearizing an amplifier output within a data transmission system
US6285412B1 (en) * 1997-07-23 2001-09-04 Harris Corporation Adaptive pre-equalization apparatus for correcting linear distortion of a non-ideal data transmission system
US6335767B1 (en) * 1998-06-26 2002-01-01 Harris Corporation Broadcast transmission system with distributed correction
US20030058959A1 (en) * 2001-09-25 2003-03-27 Caly Networks. Combined digital adaptive pre-distorter and pre-equalizer system for modems in link hopping radio networks
EP1318643B1 (en) * 2001-12-05 2007-05-02 Telefonaktiebolaget LM Ericsson (publ) Method and device for performing adaptive predistortion
US7313199B2 (en) * 2002-03-21 2007-12-25 Hypres, Inc. Power amplifier linearization

Also Published As

Publication number Publication date
EP1709729A1 (en) 2006-10-11
EP1709729A4 (en) 2006-12-27
TW200541280A (en) 2005-12-16

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Legal Events

Date Code Title Description
B08F Application fees: dismissal - article 86 of industrial property law

Free format text: REFERENTE A 6A ANUIDADES

B08K Lapse as no evidence of payment of the annual fee has been furnished to inpi (acc. art. 87)

Free format text: REFERENTE AO DESPACHO 8.6 PUBLICADO NA RPI 2099 DE 29/03/2011.