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WO2006065462B1 - A transmitter, a transceiver and a method of controlling a transmit power therefor - Google Patents

A transmitter, a transceiver and a method of controlling a transmit power therefor

Info

Publication number
WO2006065462B1
WO2006065462B1 PCT/US2005/042249 US2005042249W WO2006065462B1 WO 2006065462 B1 WO2006065462 B1 WO 2006065462B1 US 2005042249 W US2005042249 W US 2005042249W WO 2006065462 B1 WO2006065462 B1 WO 2006065462B1
Authority
WO
WIPO (PCT)
Prior art keywords
power amplifier
frequency
signal
transmitter
band
Prior art date
Application number
PCT/US2005/042249
Other languages
French (fr)
Other versions
WO2006065462A3 (en
WO2006065462A2 (en
Inventor
Christopher E Brice
Peter A Clark
Andrew Hutchison
Original Assignee
Motorola Inc
Christopher E Brice
Peter A Clark
Andrew Hutchison
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, Christopher E Brice, Peter A Clark, Andrew Hutchison filed Critical Motorola Inc
Publication of WO2006065462A2 publication Critical patent/WO2006065462A2/en
Publication of WO2006065462A3 publication Critical patent/WO2006065462A3/en
Publication of WO2006065462B1 publication Critical patent/WO2006065462B1/en

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/72—Gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
    • H03G3/3042—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers in modulators, frequency-changers, transmitters or power amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transmitters (AREA)

Abstract

A transmitter (100) for transmitting a radio signal comprises a power amplifier (103) for generating an amplified radio frequency signal. A coupling element (107) couples the signal to a measurement controller (109) which determines a non-linearity indication of the power amplifier (103) from the amplified signal. The measurement controller (109) may for example measure a signal level of an out of band frequency interval. The measurement controller (109) is coupled to a power controller (111) which controls an output power of the power amplifier (103) in response to the non-linearity indication. The power controller (111) may specifically deactivate the power amplifier (103) if the non-linearity indication exceeds a given threshold. The invention may in particular allow for a delayed switch-off of a power amplifier (103) during battery backup operation.

Claims

AMENDED CLAIMS[received by the International Bureau on 06 June 2006 (06.06.2006)(3 pages) ]
1. (currently amended) A system for controlling non-linearity of a power amplifier, the system including a transmitter for transmitting a radio signal, the transmitter comprising: a power amplifier for generating an amplified radio frequency signal; dotormiaing moons a filter for determining a non-linearity indication of the power amplifier from the amplified signal, wherein the filter.has an adjustable central frequency outside of the channel frequency band of the radio signal such that on-channeL frequencies area attenuated more than at least one out-of-band frequency interval: and control means for controlling limiting an output power of the power amplifier in response to the non-linearity indication.
2. (currently amended) The trαnamittof system claimed in claim l! wherein the control means is operable to doactivatc-the power amplifier in response to the non-linearity indication control the center frequency and bandwidth of the filter to select spurious frequencies,
3. (currently amended) The transmitter system claimed in claim 1 wherein the determining means is operable to determine the non linearity indication in response to αt least-ene-o-Ethβ group of; a froquonoy-doia^an-obafaoterifltio of tho ompMed-flifflcdra-Qignal powor of tho amplified' signal in at least one out of band frequency interval, and- a signal powor of at loaot ono out-of-band-opuriouo of tho-αmplifiod -oipBal further comprising: a receiver to receive out of band signals: and a frequency converter that is operable to convert an out-of-baπd frequency of the transmit band to a frequency within a receive band to which the receiver is tuned,
4. (currently amended) The transmittor system claimed in claim 1 wherein the transmitter further comprises means for detecting a parameter drift of the power amplifier in response to the non-linearity indication.
33
5. (currently amended) The transmitter system claimed in claim 1 βsd further comprising: a receiver for receiving signals from a remote transmitter, the receiver being operable to generate a received signal level indication; and coupling means for coupling the amplified signal to the receiver; and wherein the determining control means is operable to determine the non-linearity indication in response to the received signal level indication when the amplified signal is coupled to the receiver.
6. (currently amended) The transmitter system claimed in claim 5 wherein the coupling means comprises means for converting between a transmit frequency of the transceiver and a receive frequency of the transceiver.
7. (currently amended) The transmitter system claimed in claim 5 wherein the receiver has an associated receiver channel bandwidth, and the transceiver comprises means for measuring a frequency band having a larger bandwidth than the receiver channel bandwidth by varying a conversion frequency of the coupling means.
8. (currently amended) The transmitter system claimed in claim 7 further comprising a base station, wherein the control means is further operable to deactivate the; power amplifier in response to an operating characteristic of a cell supported by the base station.
9. (currently amended) The teass-sittef system claimed in claim 7 wherein the control means is further operable to deactivate the power amplifier in response to an operating characteristic of a neighbour cell of the base station.
34
10. (currently amended) A method of controlling a -transmit non-linearitv ofa power amplifier of a transmitter comprising a power amplifier for generating an amplified radio frequency signal, the method comprising the steps of: determining a non-linearity indication of the power amplifier from the amplified signal by, filtering with an adjustable central frequency outside of the channel frequency band of the radio signal such τhat.on-channel frequencies area attenuated more than at least one out-of-band frequency interval; and controlling limiting an output power of the power amplifier in response to the non-linearity indication.
PCT/US2005/042249 2004-12-17 2005-11-18 A transmitter, a transceiver and a method of controlling a transmit power therefor WO2006065462A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0427638A GB2421373B (en) 2004-12-17 2004-12-17 A transmitter a transceiver and method of controlling a transmit power therefor
GB0427638.2 2004-12-17

Publications (3)

Publication Number Publication Date
WO2006065462A2 WO2006065462A2 (en) 2006-06-22
WO2006065462A3 WO2006065462A3 (en) 2006-09-08
WO2006065462B1 true WO2006065462B1 (en) 2006-11-02

Family

ID=34090201

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2005/042249 WO2006065462A2 (en) 2004-12-17 2005-11-18 A transmitter, a transceiver and a method of controlling a transmit power therefor

Country Status (2)

Country Link
GB (1) GB2421373B (en)
WO (1) WO2006065462A2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI20075343A0 (en) * 2007-05-11 2007-05-11 Nokia Corp Regulation of emission from radio transmitters
US8538353B2 (en) * 2011-02-18 2013-09-17 Qualcomm Incorporated Adaptive average power tracking
US8879665B2 (en) * 2011-06-08 2014-11-04 Broadcom Corporation Controlling a power amplifier based on transmitter output emissions
EP4142167A1 (en) 2018-02-02 2023-03-01 ViaSat Inc. Radio frequency loopback for transceivers
WO2024080621A1 (en) * 2022-10-11 2024-04-18 삼성전자 주식회사 Electronic device comprising antenna, and operation method therefor

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6703897B2 (en) * 2001-12-26 2004-03-09 Nortel Networks Limited Methods of optimising power amplifier efficiency and closed-loop power amplifier controllers
US6891902B2 (en) * 2002-07-02 2005-05-10 Intel Corporation System and method for adjusting a power level of a transmission signal
US7471738B2 (en) * 2002-12-02 2008-12-30 Research In Motion Limited Method and apparatus for optimizing transmitter power efficiency
US6950636B2 (en) * 2002-12-06 2005-09-27 Skyworks Solutions, Inc. Power amplifier control driver having over-current protection and linear control
JP4356384B2 (en) * 2003-07-09 2009-11-04 日本電気株式会社 Nonlinear compensation circuit, transmitter, and nonlinear compensation method
US7330517B2 (en) * 2003-11-24 2008-02-12 P-Wave Ltd. Amplifier linearization using non-linear predistortion
EP1557995A3 (en) * 2004-01-22 2012-10-17 Panasonic Corporation Data converter and data conversion method, and transmitter circuit, communications device and electronic device using the same

Also Published As

Publication number Publication date
WO2006065462A3 (en) 2006-09-08
GB0427638D0 (en) 2005-01-19
GB2421373A (en) 2006-06-21
GB2421373B (en) 2009-01-28
WO2006065462A2 (en) 2006-06-22

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