GB2442775B - Linearised transmitter and method of operation for use in wireless communications - Google Patents

Linearised transmitter and method of operation for use in wireless communications

Info

Publication number
GB2442775B
GB2442775B GB0615955A GB0615955A GB2442775B GB 2442775 B GB2442775 B GB 2442775B GB 0615955 A GB0615955 A GB 0615955A GB 0615955 A GB0615955 A GB 0615955A GB 2442775 B GB2442775 B GB 2442775B
Authority
GB
United Kingdom
Prior art keywords
wireless communications
linearised transmitter
linearised
transmitter
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
GB0615955A
Other versions
GB0615955D0 (en
GB2442775A (en
Inventor
Ib Fordsman Pedersen
Hans Christian Blomberg
Niels Svenningsen
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 Inc
Original Assignee
Motorola Inc
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 Inc filed Critical Motorola Inc
Priority to GB0615955A priority Critical patent/GB2442775B/en
Publication of GB0615955D0 publication Critical patent/GB0615955D0/en
Priority to PCT/US2007/074700 priority patent/WO2008021705A2/en
Publication of GB2442775A publication Critical patent/GB2442775A/en
Application granted granted Critical
Publication of GB2442775B publication Critical patent/GB2442775B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B1/0475—Circuits with means for limiting noise, interference or distortion
    • 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
    • H03F1/3294—Acting on the real and imaginary components of the input signal
    • 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
    • H04L27/362—Modulation using more than one carrier, e.g. with quadrature carriers, separately amplitude modulated
    • H04L27/364—Arrangements for overcoming imperfections in the modulator, e.g. quadrature error or unbalanced I and Q levels

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Transmitters (AREA)
GB0615955A 2006-08-11 2006-08-11 Linearised transmitter and method of operation for use in wireless communications Expired - Fee Related GB2442775B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB0615955A GB2442775B (en) 2006-08-11 2006-08-11 Linearised transmitter and method of operation for use in wireless communications
PCT/US2007/074700 WO2008021705A2 (en) 2006-08-11 2007-07-30 Linearised transmitter and method of operation for use in wireless communications

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0615955A GB2442775B (en) 2006-08-11 2006-08-11 Linearised transmitter and method of operation for use in wireless communications

Publications (3)

Publication Number Publication Date
GB0615955D0 GB0615955D0 (en) 2006-09-20
GB2442775A GB2442775A (en) 2008-04-16
GB2442775B true GB2442775B (en) 2009-04-29

Family

ID=37056180

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0615955A Expired - Fee Related GB2442775B (en) 2006-08-11 2006-08-11 Linearised transmitter and method of operation for use in wireless communications

Country Status (2)

Country Link
GB (1) GB2442775B (en)
WO (1) WO2008021705A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107809276B (en) * 2017-10-10 2020-02-07 中国电子科技集团公司第五十四研究所 Miniaturized satellite data transmission equipment

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2272589A (en) * 1992-11-16 1994-05-18 Linear Modulation Tech Automatic calibration of the quadrature balance within a cartesian amplifier
GB2293935A (en) * 1994-10-03 1996-04-10 Linear Modulation Tech Calibration of carrier suppression and loop phase in a cartesian amplifier
GB2329085A (en) * 1997-09-09 1999-03-10 Gec Marconi Communications Lim RF transmitter amplifier with Cartesian feedback and use of test DC offsets to reduce carrier breakthrough
US5978662A (en) * 1996-06-28 1999-11-02 U.S. Philips Corporation Circuit arrangement comprising a Cartesian amplifier
WO2005002112A2 (en) * 2003-06-06 2005-01-06 Interdigital Technology Corporation Digital baseband system and process for compensating for analog radio transmitter impairments
GB2408860A (en) * 2003-12-04 2005-06-08 Motorola Inc A training method for reducing phase and gain loop imbalances in a Cartesian loop or adaptive predistortion radio transmitter amplifier

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4591800A (en) * 1984-10-01 1986-05-27 Motorola, Inc. Linear power amplifier feedback improvement
US6169886B1 (en) * 1998-11-02 2001-01-02 Motorola, Inc. Power amplifier control according to a delayed waveform suitable for use in a communication device
US7103329B1 (en) * 2001-10-25 2006-09-05 Rockwell Collins, Inc. Adaptive feedback channel for radio frequency power amplifiers
US7394311B2 (en) * 2005-02-18 2008-07-01 Samsung Electronics Co., Ltd. Apparatus and method for reduced sample rate class S RF power amplifier

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2272589A (en) * 1992-11-16 1994-05-18 Linear Modulation Tech Automatic calibration of the quadrature balance within a cartesian amplifier
GB2293935A (en) * 1994-10-03 1996-04-10 Linear Modulation Tech Calibration of carrier suppression and loop phase in a cartesian amplifier
US5978662A (en) * 1996-06-28 1999-11-02 U.S. Philips Corporation Circuit arrangement comprising a Cartesian amplifier
GB2329085A (en) * 1997-09-09 1999-03-10 Gec Marconi Communications Lim RF transmitter amplifier with Cartesian feedback and use of test DC offsets to reduce carrier breakthrough
WO2005002112A2 (en) * 2003-06-06 2005-01-06 Interdigital Technology Corporation Digital baseband system and process for compensating for analog radio transmitter impairments
GB2408860A (en) * 2003-12-04 2005-06-08 Motorola Inc A training method for reducing phase and gain loop imbalances in a Cartesian loop or adaptive predistortion radio transmitter amplifier

Also Published As

Publication number Publication date
GB0615955D0 (en) 2006-09-20
WO2008021705A3 (en) 2008-11-06
GB2442775A (en) 2008-04-16
WO2008021705A2 (en) 2008-02-21

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Legal Events

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

Effective date: 20210811