WO2001041298A3 - Control scheme for distortion reduction - Google Patents

Control scheme for distortion reduction Download PDF

Info

Publication number
WO2001041298A3
WO2001041298A3 PCT/GB2000/004617 GB0004617W WO0141298A3 WO 2001041298 A3 WO2001041298 A3 WO 2001041298A3 GB 0004617 W GB0004617 W GB 0004617W WO 0141298 A3 WO0141298 A3 WO 0141298A3
Authority
WO
WIPO (PCT)
Prior art keywords
signal
vector modulator
distortion
control scheme
produce
Prior art date
Application number
PCT/GB2000/004617
Other languages
French (fr)
Other versions
WO2001041298A2 (en
Inventor
Peter Kenington
Anthony Michael New
Original Assignee
Wireless Systems Int Ltd
Peter Kenington
Anthony Michael New
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 Wireless Systems Int Ltd, Peter Kenington, Anthony Michael New filed Critical Wireless Systems Int Ltd
Priority to EP00977780A priority Critical patent/EP1234375A2/en
Priority to US10/148,995 priority patent/US6707338B2/en
Priority to AU15413/01A priority patent/AU1541301A/en
Publication of WO2001041298A2 publication Critical patent/WO2001041298A2/en
Publication of WO2001041298A3 publication Critical patent/WO2001041298A3/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
    • H03F1/32—Modifications of amplifiers to reduce non-linear distortion
    • H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
    • H03F1/3258—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits based on polynomial terms
    • 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

Abstract

In predistorter (100), non-linear element (126) generates a distortion signal which is injected into the input (110) of a non-linear power amplifier (112 at 118). The distortion signal is optimised by a vector modulator to cancel distortion caused by amplifier (112). The control signals for the vector modulator are provided by a digital signal processor (Figure 2). The input signal (110) and the output signal (114) are sampled and processed to produce an audio frequency error signal which is correlated in the DSP to produce the control signals for the vector modulator whilst avoiding analogue correlation problems.
PCT/GB2000/004617 1999-12-02 2000-12-01 Control scheme for distortion reduction WO2001041298A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP00977780A EP1234375A2 (en) 1999-12-02 2000-12-01 Control scheme for distortion reduction
US10/148,995 US6707338B2 (en) 1999-12-02 2000-12-01 Control scheme for distortion reduction
AU15413/01A AU1541301A (en) 1999-12-02 2000-12-01 Control scheme for distortion reduction

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9928553A GB2356992B (en) 1999-12-02 1999-12-02 Control scheme for distorton reduction
GB9928553.8 1999-12-02

Publications (2)

Publication Number Publication Date
WO2001041298A2 WO2001041298A2 (en) 2001-06-07
WO2001041298A3 true WO2001041298A3 (en) 2001-11-08

Family

ID=10865613

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2000/004617 WO2001041298A2 (en) 1999-12-02 2000-12-01 Control scheme for distortion reduction

Country Status (5)

Country Link
US (1) US6707338B2 (en)
EP (1) EP1234375A2 (en)
AU (1) AU1541301A (en)
GB (1) GB2356992B (en)
WO (1) WO2001041298A2 (en)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7187237B1 (en) * 2002-10-08 2007-03-06 Impinj, Inc. Use of analog-valued floating-gate transistors for parallel and serial signal processing
US7327803B2 (en) 2004-10-22 2008-02-05 Parkervision, Inc. Systems and methods for vector power amplification
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
US7193462B2 (en) * 2005-03-22 2007-03-20 Powerwave Technologies, Inc. RF power amplifier system employing an analog predistortion module using zero crossings
US8175551B2 (en) 2005-06-24 2012-05-08 Nec Corporation Distortion compensation device for use in high-frequency power amplifier
US8013675B2 (en) 2007-06-19 2011-09-06 Parkervision, Inc. Combiner-less multiple input single output (MISO) amplification with blended control
US7911272B2 (en) 2007-06-19 2011-03-22 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including blended control embodiments
US8334722B2 (en) 2007-06-28 2012-12-18 Parkervision, Inc. Systems and methods of RF power transmission, modulation and amplification
US9106316B2 (en) 2005-10-24 2015-08-11 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification
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
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
WO2008144017A1 (en) 2007-05-18 2008-11-27 Parkervision, Inc. Systems and methods of rf power transmission, modulation, and amplification
KR20140026458A (en) 2011-04-08 2014-03-05 파커비전, 인크. Systems and methods of rf power transmission, modulation, and amplification
US9794057B1 (en) 2011-04-29 2017-10-17 Keysight Technologies, Inc. Method and system for synthetically sampling input signal
EP2715867A4 (en) 2011-06-02 2014-12-17 Parkervision Inc Antenna control
US9444417B2 (en) 2013-03-15 2016-09-13 Qorvo Us, Inc. Weakly coupled RF network based power amplifier architecture
US9294045B2 (en) 2013-03-15 2016-03-22 Rf Micro Devices, Inc. Gain and phase calibration for closed loop feedback linearized amplifiers
US9899133B2 (en) 2013-08-01 2018-02-20 Qorvo Us, Inc. Advanced 3D inductor structures with confined magnetic field
WO2015042142A1 (en) 2013-09-17 2015-03-26 Parkervision, Inc. Method, apparatus and system for rendering an information bearing function of time
US10079702B2 (en) * 2015-07-06 2018-09-18 Mediatek Singapore Pte. Ltd. Front-end module and coupling compensation for closed-loop digital pre-distortion system
US11238725B2 (en) * 2017-03-16 2022-02-01 The Governors Of The University Of Alberta Apparatus and methods for wireless/RFID sensors

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5923214A (en) * 1997-12-17 1999-07-13 Motorola, Inc. Feedforward amplifier network with swept pilot tone for reducing distortion generated by a power amplifier
WO1999045640A1 (en) * 1998-03-06 1999-09-10 Wireless Systems International Limited A predistorter

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05211415A (en) * 1992-01-30 1993-08-20 Hitachi Ltd Semiconductor device
GB2321004B (en) 1997-03-06 1998-12-02 Willsher & Quick Ltd Improvements in or relating to enclosures
GB2337169A (en) * 1998-05-07 1999-11-10 Nokia Mobile Phones Ltd An adaptive predistorter for an amplifier
WO2000074232A1 (en) * 1999-05-28 2000-12-07 Fujitsu Limited Predistortion type distortion compensation amplifier

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5923214A (en) * 1997-12-17 1999-07-13 Motorola, Inc. Feedforward amplifier network with swept pilot tone for reducing distortion generated by a power amplifier
WO1999045640A1 (en) * 1998-03-06 1999-09-10 Wireless Systems International Limited A predistorter

Also Published As

Publication number Publication date
WO2001041298A2 (en) 2001-06-07
GB2356992A (en) 2001-06-06
GB2356992B (en) 2004-07-14
US6707338B2 (en) 2004-03-16
GB9928553D0 (en) 2000-02-02
EP1234375A2 (en) 2002-08-28
US20030102914A1 (en) 2003-06-05
AU1541301A (en) 2001-06-12

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