BR9816112A - Transmissor de portador de múltiplas frequências, estação base, e, método de transmissão de frequência de múltiplos portadores - Google Patents

Transmissor de portador de múltiplas frequências, estação base, e, método de transmissão de frequência de múltiplos portadores

Info

Publication number
BR9816112A
BR9816112A BR9816112-1A BR9816112A BR9816112A BR 9816112 A BR9816112 A BR 9816112A BR 9816112 A BR9816112 A BR 9816112A BR 9816112 A BR9816112 A BR 9816112A
Authority
BR
Brazil
Prior art keywords
carrier
base station
transmission method
frequency
transmitter
Prior art date
Application number
BR9816112-1A
Other languages
English (en)
Inventor
Harri Posti
Original Assignee
Nokia Networks Oy
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 filed Critical Nokia Networks Oy
Publication of BR9816112A publication Critical patent/BR9816112A/pt

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
    • 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
    • H03F1/3282—Acting on the phase and the amplitude of the input signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/62—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for providing a predistortion of the signal in the transmitter and corresponding correction in the receiver, e.g. for improving the signal/noise ratio
    • 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
    • H03F2201/3206—Multiple channels are combined and amplified by only one amplifier
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmitters (AREA)
  • Amplifiers (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

"TRANSMISSOR DE PORTADOR DE MúLTIPLAS FREQuêNCIAS, ESTAçãO BASE, E, MéTODO DE TRANSMISSãO DE FREQuêNCIA DE MúLTIPLOS PORTADORES" Um transmissor de portador de múltiplas freq³ências (102) compreende um dispositivo de entrada para receber uma pluralidade de sinais digitais a serem transmitidos. Os sinais diferentes devem ser transmitidos em diferentes freq³ências de portador. Um dispositivo de amplificador (122) recebe um sinal compósito compreendendo os sinais diferentes nas respectivas freq³ências de portador e amplificar o sinal compósito. O dispositivo de pré-distorção (108) pré distorce a pluralidade de sinais digitais antes da amplificação do sinal compósito pelo dispositivo de amplificação. A pré-distorção fornecida pelo dispositivo de pré-distorção é subseq³entemente alterada dependendo da diferença entre os sinais de entrada e a saída do dispositivo de amplificador.
BR9816112-1A 1998-12-24 1998-12-24 Transmissor de portador de múltiplas frequências, estação base, e, método de transmissão de frequência de múltiplos portadores BR9816112A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP1998/008445 WO2000039920A1 (en) 1998-12-24 1998-12-24 Multi-frequency transmitter using predistortion and a method of transmitting

Publications (1)

Publication Number Publication Date
BR9816112A true BR9816112A (pt) 2001-09-04

Family

ID=8167169

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9816112-1A BR9816112A (pt) 1998-12-24 1998-12-24 Transmissor de portador de múltiplas frequências, estação base, e, método de transmissão de frequência de múltiplos portadores

Country Status (9)

Country Link
US (1) US6999523B2 (pt)
EP (1) EP1142104B1 (pt)
JP (1) JP3766593B2 (pt)
CN (1) CN1130009C (pt)
AU (1) AU2163399A (pt)
BR (1) BR9816112A (pt)
DE (1) DE69831274T2 (pt)
ES (1) ES2247737T3 (pt)
WO (1) WO2000039920A1 (pt)

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US7058369B1 (en) * 2001-11-21 2006-06-06 Pmc-Sierra Inc. Constant gain digital predistortion controller for linearization of non-linear amplifiers
JP4012725B2 (ja) 2001-12-05 2007-11-21 株式会社日立コミュニケーションテクノロジー プリディストーション型増幅装置
US6703897B2 (en) * 2001-12-26 2004-03-09 Nortel Networks Limited Methods of optimising power amplifier efficiency and closed-loop power amplifier controllers
US7386324B2 (en) * 2002-04-17 2008-06-10 Lenovo (Singapore) Pte. Ltd. System and method for dual path terminal connection
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
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US20040198269A1 (en) * 2002-12-30 2004-10-07 Richard Phillips Linearization of amplified feedback distortion
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DE602006000525T2 (de) * 2005-06-03 2009-02-05 Ntt Docomo Inc. Mehrbandvorverzerrer mit Korrekturwertetabellen
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US7877060B1 (en) 2006-02-06 2011-01-25 Rf Micro Devices, Inc. Fast calibration of AM/PM pre-distortion
US7653362B2 (en) * 2006-03-16 2010-01-26 Pine Valley Investments, Inc. Method and apparatus for on-chip measurement of power amplifier AM/AM and AM/PM non-linearity
US20070223621A1 (en) 2006-03-21 2007-09-27 M/A-Com, Inc. Method and apparatus for signal power ramp-up in a communication transmission
US7962108B1 (en) 2006-03-29 2011-06-14 Rf Micro Devices, Inc. Adaptive AM/PM compensation
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US7881680B1 (en) * 2006-10-23 2011-02-01 Marvell International Ltd. Predictive transmitter calibration
US8224250B2 (en) 2006-12-06 2012-07-17 Broadcom Corporation Method and system for compensating for estimated distortion in a transmitter by utilizing a digital predistortion scheme with a single feedback mixer
US20080139141A1 (en) * 2006-12-06 2008-06-12 George Varghese Method and system for estimating and compensating non-linear distortion in a transmitter using data signal feedback
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Also Published As

Publication number Publication date
DE69831274T2 (de) 2006-06-08
AU2163399A (en) 2000-07-31
WO2000039920A1 (en) 2000-07-06
CN1130009C (zh) 2003-12-03
EP1142104B1 (en) 2005-08-17
US20020021764A1 (en) 2002-02-21
DE69831274D1 (de) 2005-09-22
CN1337088A (zh) 2002-02-20
JP3766593B2 (ja) 2006-04-12
US6999523B2 (en) 2006-02-14
EP1142104A1 (en) 2001-10-10
JP2002534829A (ja) 2002-10-15
ES2247737T3 (es) 2006-03-01

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Legal Events

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B15K Others concerning applications: alteration of classification

Free format text: ALTERADA A CLASSIFICACAO DE H03F 1/32, H04B 1/62, H04B 1/04,H04L 5/06 PARA INT.CL.2011.01 H04B 1/04, H04F 1/32

Ipc: H03F 1/32 (2011.01), H04B 1/62 (2011.01), H04B 1/0

B07A Technical examination (opinion): publication of technical examination (opinion) [chapter 7.1 patent gazette]
B09B Patent application refused [chapter 9.2 patent gazette]

Free format text: INDEFIRO O PEDIDO DE ACORDO COM O ART. 8O COMBINADO COM ART. 13 E ART. 25 DA LPI.

B09B Patent application refused [chapter 9.2 patent gazette]

Free format text: MANTIDO O INDEFERIMENTO UMA VEZ QUE NAO FOI APRESENTADO RECURSO DENTRO DO PRAZO LEGAL.