WO2013126302A3 - Mechanisms for the correction of i/q impairments, and measurement of transmitter impairments using offset local oscillators - Google Patents

Mechanisms for the correction of i/q impairments, and measurement of transmitter impairments using offset local oscillators Download PDF

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Publication number
WO2013126302A3
WO2013126302A3 PCT/US2013/026572 US2013026572W WO2013126302A3 WO 2013126302 A3 WO2013126302 A3 WO 2013126302A3 US 2013026572 W US2013026572 W US 2013026572W WO 2013126302 A3 WO2013126302 A3 WO 2013126302A3
Authority
WO
WIPO (PCT)
Prior art keywords
impairments
transmitter
mechanisms
signals
receiver
Prior art date
Application number
PCT/US2013/026572
Other languages
French (fr)
Other versions
WO2013126302A2 (en
Inventor
Stephen L. Dark
Daniel J. Baker
Christopher J. Behnke
Original Assignee
National Instruments Corporation
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 US13/404,851 external-priority patent/US8638893B2/en
Priority claimed from US13/404,896 external-priority patent/US8442150B1/en
Application filed by National Instruments Corporation filed Critical National Instruments Corporation
Priority to CN201380004425.3A priority Critical patent/CN104040982B/en
Publication of WO2013126302A2 publication Critical patent/WO2013126302A2/en
Publication of WO2013126302A3 publication Critical patent/WO2013126302A3/en

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
    • H04L27/362—Modulation using more than one carrier, e.g. with quadrature carriers, separately amplitude modulated
    • H04L27/364—Arrangements for overcoming imperfections in the modulator, e.g. quadrature error or unbalanced I and Q levels
    • 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
    • H04L27/38—Demodulator circuits; Receiver circuits
    • H04L27/3845—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier
    • H04L27/3854—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier using a non - coherent carrier, including systems with baseband correction for phase or frequency offset
    • H04L27/3863—Compensation for quadrature error in the received signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0016—Stabilisation of local oscillators

Abstract

Mechanisms for reducing I/Q impairments in communication devices are described. A transmitter performs pre-correction on digital I/Q signals before converting them into analog I/Q signals, to pre-compensate for I/Q impairments which will subsequently be introduced during digital-to-analog conversion, I/Q modulation, or other processing that occurs to produce a transmission signal. A receiver receives a transmission signal, produces digital I/Q signals from it, and performs filtering on the digital I/Q signals to correct I/Q impairments at a plurality of frequency offsets. Furthermore, mechanisms for measuring transmitter and/or receiver I/Q impairments are disclosed, including iterative methods for measuring transmitter I/Q impairments using shared local oscillators or using intentionally-offset local oscillators, and methods for measuring receiver I/Q impairments. Also disclosed are methods for computing I/Q impairments from a sampled complex signal, for computing DC properties of a signal path between the transmitter and receiver, and for transforming I/Q impairments through a linear system.
PCT/US2013/026572 2012-02-24 2013-02-18 Mechanisms for the correction of i/q impairments, and measurement of transmitter impairments using offset local oscillators WO2013126302A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201380004425.3A CN104040982B (en) 2012-02-24 2013-02-18 The mechanism of correction is detracted for I/Q and detracts measurement using the transmitter for offseting local oscillator

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US13/404,851 US8638893B2 (en) 2012-02-24 2012-02-24 Mechanisms for the correction of I/Q impairments
US13/404,896 2012-02-24
US13/404,851 2012-02-24
US13/404,896 US8442150B1 (en) 2012-02-24 2012-02-24 Measurement of transmitter impairments using offset local oscillators

Publications (2)

Publication Number Publication Date
WO2013126302A2 WO2013126302A2 (en) 2013-08-29
WO2013126302A3 true WO2013126302A3 (en) 2014-01-03

Family

ID=47833373

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2013/026572 WO2013126302A2 (en) 2012-02-24 2013-02-18 Mechanisms for the correction of i/q impairments, and measurement of transmitter impairments using offset local oscillators

Country Status (2)

Country Link
CN (2) CN104040982B (en)
WO (1) WO2013126302A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018013448A1 (en) * 2016-07-14 2018-01-18 Cisco Technology, Inc. Optical transceiver compensation, monitoring and alarming
CN110708084B (en) * 2019-10-15 2022-04-29 成都振芯科技股份有限公司 Envelope detection based originating IQ correction circuit and method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030072393A1 (en) * 2001-08-02 2003-04-17 Jian Gu Quadrature transceiver substantially free of adverse circuitry mismatch effects
WO2005029798A1 (en) * 2003-09-15 2005-03-31 Intel Corporation Adaptive iq imbalance correction for multicarrier wireless communication systems
US6940916B1 (en) * 2000-01-27 2005-09-06 Pmc-Sierra, Inc. Wideband analog quadrature modulator/demodulator with pre-compensation/post-compensation correction
US20090323861A1 (en) * 2008-06-30 2009-12-31 Saeid Safavi System and Method for Blind Compensation and Correction of Transmitter IQ Imbalance at the Receiver
US7706475B1 (en) * 2005-04-15 2010-04-27 Marvell International Ltd. Compensation of I/Q mismatch in a communication system using I/Q modulation

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7269394B2 (en) * 2002-10-02 2007-09-11 Agere Systems Inc. Frequency offset compensation for communication systems
US7962113B2 (en) * 2005-10-31 2011-06-14 Silicon Laboratories Inc. Receiver with multi-tone wideband I/Q mismatch calibration and method therefor
US7881402B2 (en) * 2006-09-07 2011-02-01 Via Technologies, Inc. Compensation for gain imbalance, phase imbalance and DC offsets in a transmitter
CN101188430B (en) * 2006-11-15 2012-05-16 中兴通讯股份有限公司 A frequency deviation pre-compensation device and method for broadband code division multiple address user device
US7848450B2 (en) * 2007-03-22 2010-12-07 Texas Instruments Incorporated Methods and apparatus to pre-compensate for I/Q distortion in quadrature transmitters
US8532237B2 (en) * 2010-02-09 2013-09-10 Provigent Ltd Correction of alternating I/Q imbalance and frequency offset impairments

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6940916B1 (en) * 2000-01-27 2005-09-06 Pmc-Sierra, Inc. Wideband analog quadrature modulator/demodulator with pre-compensation/post-compensation correction
US20030072393A1 (en) * 2001-08-02 2003-04-17 Jian Gu Quadrature transceiver substantially free of adverse circuitry mismatch effects
WO2005029798A1 (en) * 2003-09-15 2005-03-31 Intel Corporation Adaptive iq imbalance correction for multicarrier wireless communication systems
US7706475B1 (en) * 2005-04-15 2010-04-27 Marvell International Ltd. Compensation of I/Q mismatch in a communication system using I/Q modulation
US20090323861A1 (en) * 2008-06-30 2009-12-31 Saeid Safavi System and Method for Blind Compensation and Correction of Transmitter IQ Imbalance at the Receiver

Also Published As

Publication number Publication date
CN104040982A (en) 2014-09-10
CN107579941A (en) 2018-01-12
WO2013126302A2 (en) 2013-08-29
CN107579941B (en) 2020-05-19
CN104040982B (en) 2017-10-24

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