WO2009072167A1 - Radio transmitting apparatus and radio transmitting method - Google Patents

Radio transmitting apparatus and radio transmitting method Download PDF

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Publication number
WO2009072167A1
WO2009072167A1 PCT/JP2007/001363 JP2007001363W WO2009072167A1 WO 2009072167 A1 WO2009072167 A1 WO 2009072167A1 JP 2007001363 W JP2007001363 W JP 2007001363W WO 2009072167 A1 WO2009072167 A1 WO 2009072167A1
Authority
WO
WIPO (PCT)
Prior art keywords
electric power
radio transmitting
transmitting amplifier
saturation
bias voltage
Prior art date
Application number
PCT/JP2007/001363
Other languages
French (fr)
Japanese (ja)
Inventor
Takumi Takayashiki
Tsuneaki Tadano
Original Assignee
Fujitsu Limited
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 Fujitsu Limited filed Critical Fujitsu Limited
Priority to PCT/JP2007/001363 priority Critical patent/WO2009072167A1/en
Publication of WO2009072167A1 publication Critical patent/WO2009072167A1/en

Links

Classifications

    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03FAMPLIFIERS
    • H03F3/00Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/24Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03FAMPLIFIERS
    • H03F1/00Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/02Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H03F1/0205Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
    • H03F1/0261Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the polarisation voltage or current, e.g. gliding Class A

Abstract

A bias voltage supplied to a transmitting amplifier of a radio transmitting apparatus is varied. At the time to amplify a preamble with higher electric power than that for a data field, the bias voltage is switched to a level at which a saturation electric power is provided so that the preamble is amplified using an optimum back-off value from the saturation electric power of the transmitting amplifier. At the time to amplify the data field, the bias voltage is switched to a level at which a saturation electric power is provided so that the data field is amplified using an optimum back-off value from the saturation electric power of the transmitting amplifier. A saturation electric power of the transmitting amplifier in the radio transmitting apparatus is varied in accordance with a change in electric power of a transmission signal, thereby preventing a reduction in efficiency of the transmitting amplifier for amplifying a transmission signal in which electric power varies.
PCT/JP2007/001363 2007-12-06 2007-12-06 Radio transmitting apparatus and radio transmitting method WO2009072167A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2007/001363 WO2009072167A1 (en) 2007-12-06 2007-12-06 Radio transmitting apparatus and radio transmitting method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2007/001363 WO2009072167A1 (en) 2007-12-06 2007-12-06 Radio transmitting apparatus and radio transmitting method

Publications (1)

Publication Number Publication Date
WO2009072167A1 true WO2009072167A1 (en) 2009-06-11

Family

ID=40717353

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/001363 WO2009072167A1 (en) 2007-12-06 2007-12-06 Radio transmitting apparatus and radio transmitting method

Country Status (1)

Country Link
WO (1) WO2009072167A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012191572A (en) * 2011-03-14 2012-10-04 Mitsubishi Electric Corp Satellite control system

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04277909A (en) * 1991-03-06 1992-10-02 Fujitsu Ltd Transmission power control method
JPH0946152A (en) * 1995-07-28 1997-02-14 Hitachi Ltd Radio transmitter-receiver
JP2002522994A (en) * 1998-08-17 2002-07-23 サムスン エレクトロニクス カンパニー リミテッド Preamble transmission apparatus and method of connecting channels in a mobile communication system
JP2003110499A (en) * 2001-09-28 2003-04-11 Seiko Epson Corp Information communication device and method therefor
JP2004032591A (en) * 2002-06-28 2004-01-29 Nec Engineering Ltd Digital modulator
JP2004120271A (en) * 2002-09-26 2004-04-15 Hitachi Kokusai Electric Inc Radio transmitter
JP2007194749A (en) * 2006-01-17 2007-08-02 Ntt Docomo Inc Transmitter, receiver, and random access control method

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04277909A (en) * 1991-03-06 1992-10-02 Fujitsu Ltd Transmission power control method
JPH0946152A (en) * 1995-07-28 1997-02-14 Hitachi Ltd Radio transmitter-receiver
JP2002522994A (en) * 1998-08-17 2002-07-23 サムスン エレクトロニクス カンパニー リミテッド Preamble transmission apparatus and method of connecting channels in a mobile communication system
JP2003110499A (en) * 2001-09-28 2003-04-11 Seiko Epson Corp Information communication device and method therefor
JP2004032591A (en) * 2002-06-28 2004-01-29 Nec Engineering Ltd Digital modulator
JP2004120271A (en) * 2002-09-26 2004-04-15 Hitachi Kokusai Electric Inc Radio transmitter
JP2007194749A (en) * 2006-01-17 2007-08-02 Ntt Docomo Inc Transmitter, receiver, and random access control method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012191572A (en) * 2011-03-14 2012-10-04 Mitsubishi Electric Corp Satellite control system

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