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MY128456A - Communications systems - Google Patents

Communications systems

Info

Publication number
MY128456A
MY128456A MYPI20014710A MY128456A MY 128456 A MY128456 A MY 128456A MY PI20014710 A MYPI20014710 A MY PI20014710A MY 128456 A MY128456 A MY 128456A
Authority
MY
Malaysia
Prior art keywords
phase
radio frequency
control signals
amplitude control
circuitry
Prior art date
Application number
Inventor
Jonas Persson
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of MY128456A publication Critical patent/MY128456A/en

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
    • H03F1/3282—Acting on the phase and the amplitude of the input signal
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

THE INVENTION RELATES TO A METHOD OF ADJUSTING A RADIO FREQUENCY SIGNAL PRODUCED BY RADIO FREQUENCY CIRCUITRY IN RESPONSE TO RECEIPT OF PHASE AND AMPLITUDE CONTROL SIGNALS FROM DIGITAL BASEBAND CIRCUITRY WHICH OPERATES TO CONVERT DIGITAL DATA SIGNALS INTO SUCH PHASE AND AMPLITUDE CONTROL SIGNALS. THE PHASE AND AMPLITUDE CONTROL SIGNALS ARE ADJUSTED IN THE DIGITAL BASEBAND CIRCUITRY IN ORDER TO COMPENSATE FOR TIME ALIGNMENT ERRORS WHICH OCCUR IN THE RADIO FREQUENCY CIRCUITRY. (FIG. 1)
MYPI20014710 2000-10-17 2001-10-10 Communications systems MY128456A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0025436A GB2368214B (en) 2000-10-17 2000-10-17 Communications systems
US24179600P 2000-10-20 2000-10-20

Publications (1)

Publication Number Publication Date
MY128456A true MY128456A (en) 2007-02-28

Family

ID=9901458

Family Applications (1)

Application Number Title Priority Date Filing Date
MYPI20014710 MY128456A (en) 2000-10-17 2001-10-10 Communications systems

Country Status (2)

Country Link
GB (1) GB2368214B (en)
MY (1) MY128456A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE50305069D1 (en) 2002-11-14 2006-10-26 Fraunhofer Ges Forschung SENDING STAGE WITH PHASES AND AMPLITUDE RULEBAR
DE10257435B3 (en) * 2002-11-14 2004-09-09 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. transmitting stage
US8090051B2 (en) 2008-04-29 2012-01-03 Motorola Solutions, Inc. Combined feedback and feed-forward linearization of radio frequency (RF) power amplifiers
US9763195B2 (en) 2015-01-21 2017-09-12 Apple Inc. Dynamic envelope elimination and restoration polar transmitter
EP3382972A1 (en) * 2017-04-01 2018-10-03 Intel IP Corporation Method and circuits for determining signal propagation time mismatches in a modulator

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2513289B2 (en) * 1989-01-06 1996-07-03 日本電気株式会社 Modulator
FR2644638B1 (en) * 1989-03-14 1991-05-31 Labo Electronique Physique
FR2707127A1 (en) * 1993-06-29 1995-01-06 Philips Laboratoire Electroniq Digital transmission system with predisposition.
US5748678A (en) * 1995-07-13 1998-05-05 Motorola, Inc. Radio communications apparatus
US5732333A (en) * 1996-02-14 1998-03-24 Glenayre Electronics, Inc. Linear transmitter using predistortion
FR2746564B1 (en) * 1996-03-22 1998-06-05 Matra Communication METHOD FOR CORRECTING NON-LINEARITIES OF AN AMPLIFIER, AND RADIO TRANSMITTER IMPLEMENTING SUCH A METHOD
US6081158A (en) * 1997-06-30 2000-06-27 Harris Corporation Adaptive pre-distortion apparatus for linearizing an amplifier output within a data transmission system
GB9825414D0 (en) * 1998-11-19 1999-01-13 Symbionics Limted Linear RF power amplifier and transmitter
DE69922266D1 (en) * 1999-05-25 2004-12-30 Nokia Corp LINEARIZATION AND MODULATION DEVICE
DE69932723T2 (en) * 1999-09-30 2007-09-06 Kabushiki Kaisha Toshiba, Kawasaki Non-linear correction device

Also Published As

Publication number Publication date
GB0025436D0 (en) 2000-11-29
GB2368214A (en) 2002-04-24
GB2368214B (en) 2004-11-03

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