AU2002223608A1 - Communications systems - Google Patents

Communications systems

Info

Publication number
AU2002223608A1
AU2002223608A1 AU2002223608A AU2360802A AU2002223608A1 AU 2002223608 A1 AU2002223608 A1 AU 2002223608A1 AU 2002223608 A AU2002223608 A AU 2002223608A AU 2360802 A AU2360802 A AU 2360802A AU 2002223608 A1 AU2002223608 A1 AU 2002223608A1
Authority
AU
Australia
Prior art keywords
communications systems
communications
systems
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.)
Abandoned
Application number
AU2002223608A
Inventor
Jonas Persson
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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
Priority claimed from GB0025436A external-priority patent/GB2368214B/en
Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of AU2002223608A1 publication Critical patent/AU2002223608A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • H03F1/3282—Acting on the phase and the amplitude of the input signal
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/336—A I/Q, i.e. phase quadrature, modulator or demodulator being used in an amplifying circuit
AU2002223608A 2000-10-17 2001-10-10 Communications systems Abandoned AU2002223608A1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GB0025436 2000-10-17
GB0025436A GB2368214B (en) 2000-10-17 2000-10-17 Communications systems
US24179600P 2000-10-20 2000-10-20
US60241796 2000-10-20
PCT/EP2001/011716 WO2002033820A1 (en) 2000-10-17 2001-10-10 Communications systems

Publications (1)

Publication Number Publication Date
AU2002223608A1 true AU2002223608A1 (en) 2002-04-29

Family

ID=26245163

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2002223608A Abandoned AU2002223608A1 (en) 2000-10-17 2001-10-10 Communications systems

Country Status (5)

Country Link
US (1) US7072420B2 (en)
CN (1) CN1252910C (en)
AU (1) AU2002223608A1 (en)
TW (1) TW578407B (en)
WO (1) WO2002033820A1 (en)

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FR2839596B1 (en) * 2002-05-07 2007-11-23 Eads Defence & Security Ntwk RADIOFREQUENCY SIGNAL GENERATOR COMPRISING AMPLITUDE AND SYNCHRONIZED PHASE OR FREQUENCY MODULATION COMPONENTS
US7263135B2 (en) * 2002-10-03 2007-08-28 Matsushita Electric Industrial Co., Ltd. Transmitting method and transmitter apparatus
US7120561B2 (en) * 2002-12-18 2006-10-10 Nokia Corporation Phase-error based signal alignment
DE10301906A1 (en) * 2003-01-17 2004-07-29 Bayer Healthcare Ag Arthropod repellent, especially useful for repelling ticks, fleas, mosquitoes and fleas from humans or animals, contains combination of pyrethroid or pyrethrin and nicotinic agonist
US7072626B2 (en) 2003-04-30 2006-07-04 Telefonaktiebolaget Lm Ericsson (Publ) Polar modulation transmitter
JP3844352B2 (en) * 2003-08-07 2006-11-08 松下電器産業株式会社 Transmitter
US7453927B2 (en) * 2003-09-26 2008-11-18 Nokia Corporation Method and apparatus to compensate AM-PM delay mismatch in envelope restoration transmitter
JP4323968B2 (en) * 2004-01-14 2009-09-02 株式会社日立コミュニケーションテクノロジー Timing adjustment method for wireless communication device
US7197087B2 (en) * 2004-07-09 2007-03-27 Powerwave Technologies, Inc. System and method for differential IQ delay compensation in a communications system utilizing adaptive AQM compensation
US7532679B2 (en) * 2004-08-12 2009-05-12 Texas Instruments Incorporated Hybrid polar/cartesian digital modulator
US7359680B2 (en) * 2004-09-14 2008-04-15 Telefonaktiebolaget Lm Ericsson (Publ) Delay calibration in polar modulation transmitters
US7355470B2 (en) 2006-04-24 2008-04-08 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including embodiments for amplifier class transitioning
US7327803B2 (en) 2004-10-22 2008-02-05 Parkervision, Inc. Systems and methods for vector power amplification
US7729235B2 (en) 2005-09-27 2010-06-01 Mediatek Inc. Method and apparatus for OVSF code generation
US8334722B2 (en) 2007-06-28 2012-12-18 Parkervision, Inc. Systems and methods of RF power transmission, modulation and amplification
US7911272B2 (en) 2007-06-19 2011-03-22 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including blended control embodiments
US8013675B2 (en) 2007-06-19 2011-09-06 Parkervision, Inc. Combiner-less multiple input single output (MISO) amplification with blended control
US7917106B2 (en) * 2006-02-03 2011-03-29 Quantance, Inc. RF power amplifier controller circuit including calibrated phase control loop
US8032097B2 (en) * 2006-02-03 2011-10-04 Quantance, Inc. Amplitude error de-glitching circuit and method of operating
US7937106B2 (en) 2006-04-24 2011-05-03 ParkerVision, Inc, Systems and methods of RF power transmission, modulation, and amplification, including architectural embodiments of same
US8031804B2 (en) 2006-04-24 2011-10-04 Parkervision, Inc. Systems and methods of RF tower transmission, modulation, and amplification, including embodiments for compensating for waveform distortion
US7558542B2 (en) * 2006-06-09 2009-07-07 Mediatek Inc. System and method for providing a transmitter for polar modulation and power amplifier linearization
WO2008144017A1 (en) 2007-05-18 2008-11-27 Parkervision, Inc. Systems and methods of rf power transmission, modulation, and amplification
US8090051B2 (en) * 2008-04-29 2012-01-03 Motorola Solutions, Inc. Combined feedback and feed-forward linearization of radio frequency (RF) power amplifiers
WO2009145887A1 (en) 2008-05-27 2009-12-03 Parkervision, Inc. Systems and methods of rf power transmission, modulation, and amplification
GB2466072B (en) * 2008-12-12 2011-03-23 Motorola Inc Adaptive cartesian loop transmitter for broadband and optimal loop stability adjustment
US8243851B2 (en) * 2009-04-01 2012-08-14 Ubidyne, Inc. Radio system and a method for relaying radio signals
JP5598243B2 (en) * 2009-11-30 2014-10-01 株式会社Ｊｖｃケンウッド FM detector, signal interpolation method, and program
US20110176641A1 (en) 2010-01-20 2011-07-21 St-Ericsson Sa D.C. Offset Estimation
EP2695294A1 (en) 2011-04-08 2014-02-12 Parkervision, Inc. Systems and methods of rf power transmission, modulation, and amplification
KR20140034895A (en) 2011-06-02 2014-03-20 파커비전, 인크. Antenna control
CN106415435B (en) 2013-09-17 2020-08-11 帕克维辛股份有限公司 Method, apparatus and system for presenting information bearing time function
JP5820449B2 (en) * 2013-09-30 2015-11-24 アンリツ株式会社 Signal analysis apparatus, synchronization system, and synchronization method
JP6271101B1 (en) * 2016-03-02 2018-01-31 三菱電機株式会社 Phase shift accuracy calibration circuit, vector synthesis type phase shifter and wireless communication device

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US5644268A (en) 1995-01-06 1997-07-01 Spectrian, Inc. Feed forward RF amplifier for combined signal and error amplification
US5748678A (en) 1995-07-13 1998-05-05 Motorola, Inc. Radio communications apparatus
US5903823A (en) * 1995-09-19 1999-05-11 Fujitsu Limited Radio apparatus with distortion compensating function
US6014570A (en) 1995-12-18 2000-01-11 The Board Of Trustees Of The Leland Stanford Junior University Efficient radio signal diversity combining using a small set of discrete amplitude and phase weights
US5672974A (en) 1996-01-18 1997-09-30 Convex Corporation Returned reference compatible, straightaway envelope delay measurement instrument and method
US5732333A (en) 1996-02-14 1998-03-24 Glenayre Electronics, Inc. Linear transmitter using predistortion
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
US6081158A (en) 1997-06-30 2000-06-27 Harris Corporation Adaptive pre-distortion apparatus for linearizing an amplifier output within a data transmission system
US5909471A (en) 1997-08-08 1999-06-01 Arraycomm, Inc. Method and system for rapid initial control signal detection in a wireless communications system
FI104450B (en) * 1997-10-09 2000-01-31 Nokia Networks Oy Method and circuitry for compensating for delay in power amplifier linearization loop
US6288610B1 (en) * 1998-03-19 2001-09-11 Fujitsu Limited Method and apparatus for correcting signals, apparatus for compensating for distortion, apparatus for preparing distortion compensating data, and transmitter
GB9825414D0 (en) 1998-11-19 1999-01-13 Symbionics Limted Linear RF power amplifier and transmitter
EP1181768B1 (en) 1999-05-25 2004-11-24 Nokia Corporation Linearisation and modulation device
US6614854B1 (en) * 1999-05-28 2003-09-02 Carriercomm, Inc. System and method for adaptive predistortion
JP4256057B2 (en) * 1999-09-30 2009-04-22 株式会社東芝 Nonlinear compensator
EP1089428B1 (en) * 1999-09-30 2006-08-09 Kabushiki Kaisha Toshiba Nonlinear compensator
US6246286B1 (en) * 1999-10-26 2001-06-12 Telefonaktiebolaget Lm Ericsson Adaptive linearization of power amplifiers
KR100446500B1 (en) * 2001-03-19 2004-09-04 삼성전자주식회사 Compensating method and circuit of non-linear distortion

Also Published As

Publication number Publication date
US20020058486A1 (en) 2002-05-16
CN1252910C (en) 2006-04-19
TW578407B (en) 2004-03-01
WO2002033820A1 (en) 2002-04-25
CN1481606A (en) 2004-03-10
US7072420B2 (en) 2006-07-04

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