SE0401797D0 - A radio transmitter and a method of operating a radio transmitter - Google Patents

A radio transmitter and a method of operating a radio transmitter

Info

Publication number
SE0401797D0
SE0401797D0 SE0401797A SE0401797A SE0401797D0 SE 0401797 D0 SE0401797 D0 SE 0401797D0 SE 0401797 A SE0401797 A SE 0401797A SE 0401797 A SE0401797 A SE 0401797A SE 0401797 D0 SE0401797 D0 SE 0401797D0
Authority
SE
Sweden
Prior art keywords
radio transmitter
transmitter
radio
operating
signal
Prior art date
Application number
SE0401797A
Other languages
English (en)
Inventor
Kenneth Ljungh
Staffan Nystroem
Thomas Lejon
Original Assignee
Andrew Corp
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 Andrew Corp filed Critical Andrew Corp
Priority to SE0401797A priority Critical patent/SE0401797D0/sv
Publication of SE0401797D0 publication Critical patent/SE0401797D0/sv
Priority to US11/571,661 priority patent/US20070259631A1/en
Priority to EP05755045A priority patent/EP1779536A1/en
Priority to JP2007520259A priority patent/JP2008506305A/ja
Priority to PCT/SE2005/000966 priority patent/WO2006006909A1/en
Priority to CNA200580026053XA priority patent/CN101002394A/zh

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
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • 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
    • H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
    • 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
    • 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
    • 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
    • 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
    • H04B1/62—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
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/7097—Direct sequence modulation interference
    • H04B2201/709709—Methods of preventing interference

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmitters (AREA)
SE0401797A 2004-07-08 2004-07-08 A radio transmitter and a method of operating a radio transmitter SE0401797D0 (sv)

Priority Applications (6)

Application Number Priority Date Filing Date Title
SE0401797A SE0401797D0 (sv) 2004-07-08 2004-07-08 A radio transmitter and a method of operating a radio transmitter
US11/571,661 US20070259631A1 (en) 2004-07-08 2005-06-21 Radio Transmitter and a Method of Operating a Radio Transmitter
EP05755045A EP1779536A1 (en) 2004-07-08 2005-06-21 A radio transmitter and a method of operating a radio transmitter
JP2007520259A JP2008506305A (ja) 2004-07-08 2005-06-21 無線送信機、及び、無線送信機の制御方法
PCT/SE2005/000966 WO2006006909A1 (en) 2004-07-08 2005-06-21 A radio transmitter and a method of operating a radio transmitter
CNA200580026053XA CN101002394A (zh) 2004-07-08 2005-06-21 无线电发射机和操作无线电发射机的方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE0401797A SE0401797D0 (sv) 2004-07-08 2004-07-08 A radio transmitter and a method of operating a radio transmitter

Publications (1)

Publication Number Publication Date
SE0401797D0 true SE0401797D0 (sv) 2004-07-08

Family

ID=32768807

Family Applications (1)

Application Number Title Priority Date Filing Date
SE0401797A SE0401797D0 (sv) 2004-07-08 2004-07-08 A radio transmitter and a method of operating a radio transmitter

Country Status (5)

Country Link
US (1) US20070259631A1 (sv)
EP (1) EP1779536A1 (sv)
CN (1) CN101002394A (sv)
SE (1) SE0401797D0 (sv)
WO (1) WO2006006909A1 (sv)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8238848B2 (en) * 2007-06-20 2012-08-07 Telefonaktiebolaget Lm Ericsson (Publ) Feed forward noise reduction in a transmitter
FI20075958A0 (sv) * 2007-12-21 2007-12-21 Nokia Corp Processering av sändningssignaler i en radiosändare
US20090258640A1 (en) * 2008-04-11 2009-10-15 Telefonaktiebolaget Lm Ericsson Device power detector
WO2010064485A1 (ja) * 2008-12-01 2010-06-10 三菱電機株式会社 分波装置、合波装置、通信装置および中継衛星
CN101626356B (zh) * 2009-08-11 2012-07-11 北京天碁科技有限公司 一种多输入多输出终端及其射频发射方法
CA2782338C (en) * 2009-11-30 2014-12-30 Akinori Fujimura Demultiplexing device, multiplexing device, and relay device
US9998241B2 (en) * 2015-02-19 2018-06-12 Mediatek Inc. Envelope tracking (ET) closed-loop on-the-fly calibration
CN105137182A (zh) * 2015-09-14 2015-12-09 张俊华 一种sdr应用中信号幅度计量定标方法
EP3391536A1 (en) * 2015-12-17 2018-10-24 u-blox AG Power amplifier apparatus, envelope tracking amplifier apparatus and method of amplifying a signal
CN107181494B (zh) * 2017-05-16 2019-04-12 成都市深思创芯科技有限公司 一种基于神经网络控制发射机工作模式的方法

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3156439B2 (ja) * 1993-04-20 2001-04-16 三菱電機株式会社 歪補償回路
JP2967699B2 (ja) * 1995-03-06 1999-10-25 日本電気株式会社 送信装置
US6081158A (en) * 1997-06-30 2000-06-27 Harris Corporation Adaptive pre-distortion apparatus for linearizing an amplifier output within a data transmission system
US5990738A (en) * 1998-06-19 1999-11-23 Datum Telegraphic Inc. Compensation system and methods for a linear power amplifier
GB2339354B (en) * 1998-07-02 2003-10-08 Wireless Systems Int Ltd A predistorter
KR100326176B1 (ko) * 1998-08-06 2002-04-17 윤종용 이동통신시스템의전력증폭장치및방법
US6128477A (en) * 1998-08-07 2000-10-03 Ericsson Inc. System for improving the dynamic range of transmitter power measurement in a cellular telephone
US6252915B1 (en) * 1998-09-09 2001-06-26 Qualcomm Incorporated System and method for gaining control of individual narrowband channels using a wideband power measurement
GB2349528B (en) * 1999-04-23 2004-05-05 Intek Global Technologies Ltd On-line calibration of linear amplifiers
JP4183364B2 (ja) * 1999-12-28 2008-11-19 富士通株式会社 歪補償装置
CN1166138C (zh) * 2000-07-20 2004-09-08 华为技术有限公司 一种宽带发射机的自适应数字预失真方法和装置
JP5036109B2 (ja) * 2001-07-12 2012-09-26 日本電気株式会社 無線送信装置および移動局装置
US7203247B2 (en) * 2001-07-23 2007-04-10 Agere Systems Inc. Digital predistortion technique for WCDMA wireless communication system and method of operation thereof
US7058369B1 (en) * 2001-11-21 2006-06-06 Pmc-Sierra Inc. Constant gain digital predistortion controller for linearization of non-linear amplifiers
US7120400B2 (en) * 2002-12-09 2006-10-10 Intel Corporation Method and apparatus to control power of transmitter
US7170342B2 (en) * 2002-12-10 2007-01-30 Ntt Docomo, Inc. Linear power amplification method and linear power amplifier
US7133649B2 (en) * 2002-12-24 2006-11-07 Hitachi Kokusai Electric, Inc. Negative feedback amplifier for transmitter, transmitter, and method of correcting error in the negative feedback amplifier
US7113036B2 (en) * 2004-04-15 2006-09-26 Agere Systems Inc. Method and apparatus for adaptive digital predistortion using nonlinear and feedback gain parameters

Also Published As

Publication number Publication date
EP1779536A1 (en) 2007-05-02
WO2006006909A1 (en) 2006-01-19
CN101002394A (zh) 2007-07-18
US20070259631A1 (en) 2007-11-08

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