DE602008003301D1 - Verfahren und Anordnung zur Einschätzung des IQ-Ungleichgewichts - Google Patents

Verfahren und Anordnung zur Einschätzung des IQ-Ungleichgewichts

Info

Publication number
DE602008003301D1
DE602008003301D1 DE602008003301T DE602008003301T DE602008003301D1 DE 602008003301 D1 DE602008003301 D1 DE 602008003301D1 DE 602008003301 T DE602008003301 T DE 602008003301T DE 602008003301 T DE602008003301 T DE 602008003301T DE 602008003301 D1 DE602008003301 D1 DE 602008003301D1
Authority
DE
Germany
Prior art keywords
sub
arrangement
imbalance
pilot
signal
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.)
Active
Application number
DE602008003301T
Other languages
English (en)
Inventor
Leif Wilhelmsson
Niklas Andgart
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
Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of DE602008003301D1 publication Critical patent/DE602008003301D1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • H04L27/38—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
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0226—Channel estimation using sounding signals sounding signals per se
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
    • H04L25/023—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols
    • H04L25/0236—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols using estimation of the other symbols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/0066—Requirements on out-of-channel emissions
DE602008003301T 2008-04-11 2008-04-11 Verfahren und Anordnung zur Einschätzung des IQ-Ungleichgewichts Active DE602008003301D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08154371A EP2109273B1 (de) 2008-04-11 2008-04-11 Verfahren und Anordnung zur Einschätzung des IQ-Ungleichgewichts

Publications (1)

Publication Number Publication Date
DE602008003301D1 true DE602008003301D1 (de) 2010-12-16

Family

ID=39790360

Family Applications (1)

Application Number Title Priority Date Filing Date
DE602008003301T Active DE602008003301D1 (de) 2008-04-11 2008-04-11 Verfahren und Anordnung zur Einschätzung des IQ-Ungleichgewichts

Country Status (6)

Country Link
US (1) US8737533B2 (de)
EP (1) EP2109273B1 (de)
CN (1) CN102057644B (de)
AT (1) ATE487309T1 (de)
DE (1) DE602008003301D1 (de)
WO (1) WO2009124953A1 (de)

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EP2337294B1 (de) * 2009-12-21 2012-07-11 TELEFONAKTIEBOLAGET LM ERICSSON (publ) IQ-Ungleichgewichtseinschätzung für nicht symmetrische Pilotensymbole
CN101815056B (zh) 2010-03-05 2012-09-05 华为技术有限公司 无线通信接收机中基带信号的iq不平衡校准方法及设备
US8995539B2 (en) * 2010-07-13 2015-03-31 Qualcomm Incorporated Methods and apparatus for selecting and using communications resources in a communication system
US8630600B1 (en) * 2011-09-26 2014-01-14 Aviat U.S., Inc. Systems and methods for asynchronous re-modulation with adaptive I/Q adjustment
CN102340479B (zh) * 2011-10-25 2014-04-02 北京华力创通科技股份有限公司 Iq不平衡补偿装置和方法
CN103166897B (zh) * 2013-03-21 2015-11-25 浙江大学 一种ofdm系统中信道及iqi参数的估计方法
CN106416168B (zh) * 2014-05-09 2019-10-18 华为技术有限公司 一种信号处理方法及装置
CN104486283B (zh) * 2014-12-18 2018-02-16 北京大学 一种分布式iq不平衡估计与抑制方法
GB2537800B (en) * 2014-12-22 2018-05-30 Imagination Tech Ltd IQ imbalance estimator
EP3086478B1 (de) * 2015-04-23 2018-09-19 Nxp B.V. Drahtloser empfänger und verfahren
CN106911607B (zh) * 2015-12-22 2019-11-15 上海无线通信研究中心 一种ofdm系统中同相/正交不平衡的估计方法及其模块
CN108718217B (zh) * 2018-03-16 2020-09-25 华北电力大学扬中智能电气研究中心 一种基于相干光通信系统的补偿方法及装置
US10601630B1 (en) * 2019-06-10 2020-03-24 Robert Dickerman Quadrature signal imbalance estimation
US11063618B2 (en) * 2019-09-13 2021-07-13 Texas Instruments Incorporated IQ mismatch estimation with pre-distortion
US11012273B1 (en) 2019-12-31 2021-05-18 Hughes Network Systems, Llc Compensating for frequency-dependent I-Q phase imbalance
CN113132280B (zh) * 2021-04-15 2022-06-24 深圳智微电子科技有限公司 一种iq不平衡估计方法
CN116707666B (zh) * 2023-05-30 2024-04-05 南京朗立微集成电路有限公司 一种校正WiFi发射机IQ不平衡的方法和设备

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US7054375B2 (en) * 2000-12-22 2006-05-30 Nokia Corporation Method and apparatus for error reduction in an orthogonal modulation system
US7020226B1 (en) 2002-04-04 2006-03-28 Nortel Networks Limited I/Q distortion compensation for the reception of OFDM signals
US7173988B2 (en) 2002-08-29 2007-02-06 Conexant, Inc. Adaptive phase and gain imbalance cancellation
US7529306B2 (en) 2002-09-09 2009-05-05 Infineon Technologies Ag Estimation of asymmetries between inphase and quadrature branches in multicarrier transmission systems
US20050180534A1 (en) 2002-09-09 2005-08-18 Infineon Technologies Ag Iterative estimation and equalization of asymmetries between inphase and quadrature branches in multicarrier transmission systems
DE10241676A1 (de) * 2002-09-09 2004-03-18 Infineon Technologies Ag Präambel zur Schätzung und Entzerrung von Unsymmetrien zwischen Inphase- und Quadraturzweig in Mehrträger-Übertragungssystemen
US7428260B2 (en) * 2003-10-30 2008-09-23 Marvell World Trade Ltd. Unified MMSE equalization and multi-user detection approach for use in a CDMA system
US7701917B2 (en) * 2004-02-05 2010-04-20 Qualcomm Incorporated Channel estimation for a wireless communication system with multiple parallel data streams
FR2878393B1 (fr) * 2004-11-23 2007-01-12 Commissariat Energie Atomique Procede et dispositif de compensation de desequilibres d'un recepteur
US7675846B2 (en) 2006-06-23 2010-03-09 Telefonaktiebolaget L M Ericsson (Publ) Method and system for using the synchronization channel to obtain measurements in a cellular communications system
JP4213734B2 (ja) 2006-07-05 2009-01-21 株式会社東芝 Ｏｆｄｍを用いた無線通信方法及びｏｆｄｍ受信装置
US7652976B2 (en) * 2007-05-07 2010-01-26 Industrial Technology Research Institute Method for estimating and compensating IQ imbalance in OFDM systems
US8064550B2 (en) * 2007-03-09 2011-11-22 Qualcomm, Incorporated Quadrature imbalance estimation using unbiased training sequences

Also Published As

Publication number Publication date
US20110243263A1 (en) 2011-10-06
EP2109273B1 (de) 2010-11-03
US8737533B2 (en) 2014-05-27
WO2009124953A1 (en) 2009-10-15
CN102057644A (zh) 2011-05-11
EP2109273A1 (de) 2009-10-14
ATE487309T1 (de) 2010-11-15
CN102057644B (zh) 2014-02-26

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