GB2329085B - RF transmitter - Google Patents

RF transmitter

Info

Publication number
GB2329085B
GB2329085B GB9719224A GB9719224A GB2329085B GB 2329085 B GB2329085 B GB 2329085B GB 9719224 A GB9719224 A GB 9719224A GB 9719224 A GB9719224 A GB 9719224A GB 2329085 B GB2329085 B GB 2329085B
Authority
GB
United Kingdom
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.)
Expired - Fee Related
Application number
GB9719224A
Other versions
GB9719224D0 (en
GB2329085A (en
Inventor
Marcus Antony Westall
William Stancer
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
Priority to GB9719224A priority Critical patent/GB2329085B/en
Publication of GB9719224D0 publication Critical patent/GB9719224D0/en
Priority to PCT/GB1998/002716 priority patent/WO1999013590A1/en
Priority to AU90836/98A priority patent/AU9083698A/en
Publication of GB2329085A publication Critical patent/GB2329085A/en
Application granted granted Critical
Publication of GB2329085B publication Critical patent/GB2329085B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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)
GB9719224A 1997-09-09 1997-09-09 RF transmitter Expired - Fee Related GB2329085B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB9719224A GB2329085B (en) 1997-09-09 1997-09-09 RF transmitter
PCT/GB1998/002716 WO1999013590A1 (en) 1997-09-09 1998-09-09 Rf transmitter
AU90836/98A AU9083698A (en) 1997-09-09 1998-09-09 Rf transmitter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9719224A GB2329085B (en) 1997-09-09 1997-09-09 RF transmitter

Publications (3)

Publication Number Publication Date
GB9719224D0 GB9719224D0 (en) 1997-11-12
GB2329085A GB2329085A (en) 1999-03-10
GB2329085B true GB2329085B (en) 2002-06-12

Family

ID=10818847

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9719224A Expired - Fee Related GB2329085B (en) 1997-09-09 1997-09-09 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

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2293935A (en) * 1994-10-03 1996-04-10 Linear Modulation Tech Calibration of carrier suppression and loop phase in a cartesian amplifier
WO1997015980A1 (en) * 1995-10-24 1997-05-01 Philips Electronics N.V. Transmitter comprising carrier suppression and dc offset reduction means

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69324210T2 (en) * 1992-11-16 1999-08-05 Linear Modulation Technology Ltd., Midsomer Norton, Bath Automatic calibration of the quadrature balance in a Cartesian amplifier
US5396196A (en) * 1993-12-29 1995-03-07 At&T Corp. Quadrature modular with adaptive suppression of carrier leakage

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2293935A (en) * 1994-10-03 1996-04-10 Linear Modulation Tech Calibration of carrier suppression and loop phase in a cartesian amplifier
WO1997015980A1 (en) * 1995-10-24 1997-05-01 Philips Electronics N.V. Transmitter comprising carrier suppression and dc offset reduction means

Also Published As

Publication number Publication date
GB9719224D0 (en) 1997-11-12
GB2329085A (en) 1999-03-10
AU9083698A (en) 1999-03-29
WO1999013590A1 (en) 1999-03-18

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20100909