GB2283629B - Radio communications apparatus - Google Patents

Radio communications apparatus

Info

Publication number
GB2283629B
GB2283629B GB9322006A GB9322006A GB2283629B GB 2283629 B GB2283629 B GB 2283629B GB 9322006 A GB9322006 A GB 9322006A GB 9322006 A GB9322006 A GB 9322006A GB 2283629 B GB2283629 B GB 2283629B
Authority
GB
United Kingdom
Prior art keywords
radio communications
communications apparatus
radio
communications
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
GB9322006A
Other versions
GB9322006D0 (en
GB2283629A (en
Inventor
Stephen Thomas Valentine
Anthony John Wray
Terence Edwin Dodgson
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.)
Motorola Solutions UK Ltd
Original Assignee
Motorola 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 Motorola Ltd filed Critical Motorola Ltd
Priority to GB9322006A priority Critical patent/GB2283629B/en
Publication of GB9322006D0 publication Critical patent/GB9322006D0/en
Publication of GB2283629A publication Critical patent/GB2283629A/en
Application granted granted Critical
Publication of GB2283629B publication Critical patent/GB2283629B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/57—Separate feedback of real and complex signals being present

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Power Engineering (AREA)
  • Transmitters (AREA)
GB9322006A 1993-10-26 1993-10-26 Radio communications apparatus Expired - Fee Related GB2283629B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9322006A GB2283629B (en) 1993-10-26 1993-10-26 Radio communications apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9322006A GB2283629B (en) 1993-10-26 1993-10-26 Radio communications apparatus

Publications (3)

Publication Number Publication Date
GB9322006D0 GB9322006D0 (en) 1993-12-15
GB2283629A GB2283629A (en) 1995-05-10
GB2283629B true GB2283629B (en) 1997-08-27

Family

ID=10744100

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9322006A Expired - Fee Related GB2283629B (en) 1993-10-26 1993-10-26 Radio communications apparatus

Country Status (1)

Country Link
GB (1) GB2283629B (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
FR2746563B1 (en) * 1996-03-22 1998-06-05 Matra Communication METHOD FOR CORRECTING NON-LINEARITIES OF AN AMPLIFIER, AND RADIO TRANSMITTER IMPLEMENTING SUCH A METHOD
FI963031A (en) * 1996-07-31 1998-02-01 Nokia Telecommunications Oy Linearization of a transmitter in a mobile station
US5890057A (en) * 1996-11-27 1999-03-30 Sierra Wireless, Inc. Modulation signal calibration between modem and radio using loopback
DE19650388A1 (en) * 1996-12-05 1998-06-18 Bosch Gmbh Robert Circuit for linearizing an amplifier
GB9715278D0 (en) 1997-07-18 1997-09-24 Cambridge Consultants Signal processing system
FR2773423B1 (en) * 1998-01-06 2001-10-19 Alsthom Cge Alkatel METHOD AND SYSTEM FOR DIGITAL LINEARIZATION OF AN AMPLIFIER
NZ338097A (en) * 1999-09-29 2001-05-25 Tait Electronics Ltd Digitally controlled envelope elimination and restoration phase lock loop radio frequency amplifier
GB2348755B (en) * 1999-04-01 2001-03-07 Wireless Systems Int Ltd Signal processing
DE50114010D1 (en) * 2001-06-14 2008-07-17 Alcatel Lucent Method and device for predistorting a transmission signal
GB2394374B (en) * 2002-10-17 2006-06-14 Roke Manor Research Improvements in or relating to RF transmitters
JP4619827B2 (en) 2005-03-07 2011-01-26 富士通株式会社 Distortion compensation device
CN104009717B (en) * 2013-02-21 2017-03-22 京信通信***（中国）有限公司 Self-adaptive pre-distortion processing method and device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993018602A1 (en) * 1992-03-02 1993-09-16 Motorola Limited Radio transmitter with linearization training sequence

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993018602A1 (en) * 1992-03-02 1993-09-16 Motorola Limited Radio transmitter with linearization training sequence
GB2265269A (en) * 1992-03-02 1993-09-22 Motorola Ltd Radio transmitter with linearization training sequence

Also Published As

Publication number Publication date
GB9322006D0 (en) 1993-12-15
GB2283629A (en) 1995-05-10

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Legal Events

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

Effective date: 19981026