AU9083698A - Rf transmitter - Google Patents

Rf transmitter

Info

Publication number
AU9083698A
AU9083698A AU90836/98A AU9083698A AU9083698A AU 9083698 A AU9083698 A AU 9083698A AU 90836/98 A AU90836/98 A AU 90836/98A AU 9083698 A AU9083698 A AU 9083698A AU 9083698 A AU9083698 A AU 9083698A
Authority
AU
Australia
Prior art keywords
transmitter
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
AU90836/98A
Inventor
William Stancer
Marcus Antony Westall
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.)
Selex Elsag Ltd
Original Assignee
GEC Marconi Communications Ltd
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 GEC Marconi Communications Ltd filed Critical GEC Marconi Communications Ltd
Publication of AU9083698A publication Critical patent/AU9083698A/en
Abandoned legal-status Critical Current

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
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/02—Details
    • H03C3/08—Modifications of modulator to linearise modulation, e.g. by feedback, and clearly applicable to more than one type of modulator
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/16—Multiple-frequency-changing
    • H03D7/165—Multiple-frequency-changing at least two frequency changers being located in different paths, e.g. in two paths with carriers in quadrature
    • H03D7/166—Multiple-frequency-changing at least two frequency changers being located in different paths, e.g. in two paths with carriers in quadrature using two or more quadrature frequency translation stages
    • H03D7/168—Multiple-frequency-changing at least two frequency changers being located in different paths, e.g. in two paths with carriers in quadrature using two or more quadrature frequency translation stages using a feedback loop containing mixers or demodulators
    • 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
    • H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
    • 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
    • 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
    • H04B2001/0408—Circuits with power amplifiers
    • H04B2001/0433—Circuits with power amplifiers with linearisation using feedback

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
AU90836/98A 1997-09-09 1998-09-09 Rf transmitter Abandoned AU9083698A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9719224A GB2329085B (en) 1997-09-09 1997-09-09 RF transmitter
GB9719224 1997-09-09
PCT/GB1998/002716 WO1999013590A1 (en) 1997-09-09 1998-09-09 Rf transmitter

Publications (1)

Publication Number Publication Date
AU9083698A true AU9083698A (en) 1999-03-29

Family

ID=10818847

Family Applications (1)

Application Number Title Priority Date Filing Date
AU90836/98A Abandoned AU9083698A (en) 1997-09-09 1998-09-09 Rf transmitter

Country Status (3)

Country Link
AU (1) AU9083698A (en)
GB (1) GB2329085B (en)
WO (1) WO1999013590A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI107212B (en) 1999-03-26 2001-06-15 Nokia Networks Oy I / Q modulator DC offset correction
GB2349528B (en) 1999-04-23 2004-05-05 Intek Global Technologies Ltd On-line calibration of linear amplifiers
CA2281236C (en) * 1999-09-01 2010-02-09 Tajinder Manku Direct conversion rf schemes using a virtually generated local oscillator
GB2442775B (en) * 2006-08-11 2009-04-29 Motorola Inc Linearised transmitter and method of operation for use in wireless communications
US8238846B2 (en) 2009-12-18 2012-08-07 Motorola Solutions, Inc. Multi carrier leakage tuning by error power detection
US8964892B2 (en) 2011-08-23 2015-02-24 Motorola Solutions, Inc. Apparatus and method for operating a transmitter

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5381108A (en) * 1992-11-16 1995-01-10 Linear Modulation Technology Limited Automatic calibration of the quadrature balance within a cartesian amplifier
US5396196A (en) * 1993-12-29 1995-03-07 At&T Corp. Quadrature modular with adaptive suppression of carrier leakage
GB2293935B (en) * 1994-10-03 1999-07-14 Linear Modulation Tech Automatic calibration of carrier suppression and loop phase in a cartesian amplifier
GB9521769D0 (en) * 1995-10-24 1996-01-03 Philips Electronics Nv Transmitter

Also Published As

Publication number Publication date
GB2329085A (en) 1999-03-10
GB9719224D0 (en) 1997-11-12
GB2329085B (en) 2002-06-12
WO1999013590A1 (en) 1999-03-18

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Legal Events

Date Code Title Description
MK6 Application lapsed section 142(2)(f)/reg. 8.3(3) - pct applic. not entering national phase