ATE551810T1 - Iq-ungleichgewichts-bildunterdrückung bei anwesenheit einer unbekannten phasenverschiebung - Google Patents

Iq-ungleichgewichts-bildunterdrückung bei anwesenheit einer unbekannten phasenverschiebung

Info

Publication number
ATE551810T1
ATE551810T1 AT08785949T AT08785949T ATE551810T1 AT E551810 T1 ATE551810 T1 AT E551810T1 AT 08785949 T AT08785949 T AT 08785949T AT 08785949 T AT08785949 T AT 08785949T AT E551810 T1 ATE551810 T1 AT E551810T1
Authority
AT
Austria
Prior art keywords
gain imbalance
maximum power
power ratio
imbalance
phase shift
Prior art date
Application number
AT08785949T
Other languages
English (en)
Inventor
Bengt Lindoff
Andres Reial
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Application granted granted Critical
Publication of ATE551810T1 publication Critical patent/ATE551810T1/de

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
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/007—Demodulation of angle-, frequency- or phase- modulated oscillations by converting the oscillations into two quadrature related signals
    • H03D3/009—Compensating quadrature phase or amplitude imbalances
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0024—Carrier regulation at the receiver end

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Circuits Of Receivers In General (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Superheterodyne Receivers (AREA)
  • Noise Elimination (AREA)
AT08785949T 2007-08-02 2008-07-07 Iq-ungleichgewichts-bildunterdrückung bei anwesenheit einer unbekannten phasenverschiebung ATE551810T1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US95349107P 2007-08-02 2007-08-02
US11/949,481 US7986930B2 (en) 2007-08-02 2007-12-03 IQ imbalance image suppression in presence of unknown phase shift
PCT/EP2008/058767 WO2009016000A2 (en) 2007-08-02 2008-07-07 Iq gain imbalance suppression in presence of unknown phase imbalance

Publications (1)

Publication Number Publication Date
ATE551810T1 true ATE551810T1 (de) 2012-04-15

Family

ID=40149852

Family Applications (1)

Application Number Title Priority Date Filing Date
AT08785949T ATE551810T1 (de) 2007-08-02 2008-07-07 Iq-ungleichgewichts-bildunterdrückung bei anwesenheit einer unbekannten phasenverschiebung

Country Status (5)

Country Link
US (1) US7986930B2 (de)
EP (1) EP2181533B1 (de)
JP (1) JP2010535441A (de)
AT (1) ATE551810T1 (de)
WO (1) WO2009016000A2 (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7822399B2 (en) 2007-05-11 2010-10-26 Telefonaktiebolaget Lm Ericsson (Publ) Image compensation for wireless receiver
US8428183B2 (en) * 2011-04-01 2013-04-23 Opnext Subsystems, Inc. In-phase and quadrature pattern alignment for quadrature phase shift keying optical transmitters
US8644420B2 (en) * 2011-04-01 2014-02-04 Opnext Subsystems, Inc. Alignment of in-phase and quadrature data in quadrature phase shift keying optical transmitters
US9020019B2 (en) 2012-02-24 2015-04-28 National Instruments Corporation Computing I/Q impairments at system output based on I/Q impairments at system input
US8638893B2 (en) 2012-02-24 2014-01-28 National Instruments Corporation Mechanisms for the correction of I/Q impairments
US8442150B1 (en) 2012-02-24 2013-05-14 National Instruments Corporation Measurement of transmitter impairments using offset local oscillators
JP2015154154A (ja) * 2014-02-12 2015-08-24 国立大学法人東京工業大学 相補Ｇｏｌａｙ符号を用いた直交変復調方法及び装置
GB2537800B (en) * 2014-12-22 2018-05-30 Imagination Tech Ltd IQ imbalance estimator
KR102055192B1 (ko) * 2017-08-25 2019-12-12 한밭대학교 산학협력단 직접 변환 송신기의 i/q 불균형 보상 장치 및 방법
CN114143159B (zh) * 2021-12-08 2022-06-07 北京力通通信有限公司 接收机跟踪iq失衡校正方法及装置
CN119766395B (zh) * 2024-12-20 2025-09-26 中国科学技术大学 用于通信接收机的载波相位和iq不平衡的补偿方法、装置及设备

Family Cites Families (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6498784B1 (en) * 1998-10-20 2002-12-24 Interdigital Technology Corporation Cancellation of pilot and traffic signals
US6515980B1 (en) * 1999-09-22 2003-02-04 Ericsson Inc. Methods and apparatus for interference cancellation using complex interference orthogonalization techniques
US6442217B1 (en) * 2000-05-22 2002-08-27 Sicom, Inc. Digital communication receiver with digital, IF, I-Q balancer
US6999501B1 (en) * 2000-09-15 2006-02-14 Telefonaktiebolaget Lm Ericsson (Publ) Method and device for attenuating an interferer from a communication signal
US7177372B2 (en) * 2000-12-21 2007-02-13 Jian Gu Method and apparatus to remove effects of I-Q imbalances of quadrature modulators and demodulators in a multi-carrier system
US7061994B2 (en) * 2001-06-21 2006-06-13 Flarion Technologies, Inc. Methods and apparatus for I/Q imbalance compensation
US20030072393A1 (en) * 2001-08-02 2003-04-17 Jian Gu Quadrature transceiver substantially free of adverse circuitry mismatch effects
US7035341B2 (en) * 2001-08-10 2006-04-25 Maxim Integrated Products, Inc. Quadrature gain and phase imbalance correction in a receiver
US20030165203A1 (en) * 2001-08-10 2003-09-04 Rishi Mohindra Quadrature gain and phase imbalance correction in a receiver
US7076008B2 (en) * 2001-11-02 2006-07-11 Texas Instruments Incorporated Method and apparatus for estimating and correcting gain and phase imbalance in a code division multiple access system
US7130359B2 (en) * 2002-03-12 2006-10-31 Motorola Inc. Self calibrating receive path correction system in a receiver
EP1361655A1 (de) * 2002-05-07 2003-11-12 Semiconductor Ideas to The Market (ItoM) BV Spiegelunterdrückungsschaltung in einem quadratur-demodulator
US20040165678A1 (en) * 2002-08-27 2004-08-26 Zivi Nadiri Method for measuring and compensating gain and phase imbalances in quadrature modulators
US7173988B2 (en) * 2002-08-29 2007-02-06 Conexant, Inc. Adaptive phase and gain imbalance cancellation
EP1547239A1 (de) * 2002-09-16 2005-06-29 Nokia Corporation DIREKTUMSETZUNGSEMPFûNGER UND EMPFANGSVERFAHREN
US7133657B2 (en) * 2002-09-26 2006-11-07 Agere Systems Inc. Channel calibrator for use with a quadrature mixing receiver and a method of operation thereof
US7010278B2 (en) * 2002-10-25 2006-03-07 Freescale Semiconductor, Inc. Sideband suppression method and apparatus for quadrature modulator using magnitude measurements
DE60209983T2 (de) 2002-11-04 2006-12-21 Sony Deutschland Gmbh Korrektur von I/Q Ungleichheiten in einem Quadratur-Sender-Empfänger
TWI222279B (en) * 2002-11-20 2004-10-11 Realtek Semiconductor Corp Estimation/compensation method and device for in-phase/quadrature-phase unbalance
US7151917B2 (en) * 2003-09-29 2006-12-19 Silicon Laboratories, Inc. Apparatus and method for deriving a digital image correction factor in a receiver
US7142835B2 (en) * 2003-09-29 2006-11-28 Silicon Laboratories, Inc. Apparatus and method for digital image correction in a receiver
US7184714B1 (en) * 2003-11-04 2007-02-27 Advanced Micro Devices, Inc. Frequency domain estimation of IQ imbalance in a wireless OFDM direct conversion receiver using loopback connection
WO2005109625A2 (en) * 2004-04-30 2005-11-17 Telegent Systems, Inc. Integrated analog video receiver
US7190733B2 (en) * 2004-11-22 2007-03-13 Cognio, Inc. Memoryless spectrum correction algorithm for non-ideal I/Q demodulators
US20060229051A1 (en) * 2005-04-07 2006-10-12 Narayan Anand P Interference selection and cancellation for CDMA communications
JP4708076B2 (ja) * 2005-04-14 2011-06-22 三星電子株式会社 ダウンコンバータ及びアップコンバータ
US7526265B2 (en) * 2005-05-24 2009-04-28 Skyworks Solutions, Inc. Method and system for receiver impairment estimation and correction
GB2427090B (en) * 2005-06-08 2011-01-12 Zarlink Semiconductor Ltd Method of reducing imbalance in a quadrature frequency converter, method of measuring imbalance in such a converter, and apparatus for performing such method
TWI284472B (en) * 2005-10-12 2007-07-21 Sunplus Technology Co Ltd Apparatus and method for adaptively correcting I/Q imbalance
US7995981B2 (en) * 2005-10-31 2011-08-09 Silicon Laboratories Inc. Receiver with image rejection calibration at an undesired picture carrier and method therefor
KR20070068821A (ko) * 2005-12-27 2007-07-02 삼성전자주식회사 직교주파수 분할 다중화 수신기에서 초기 반송파 주파수오프셋의 추정 장치 및 방법

Also Published As

Publication number Publication date
WO2009016000A3 (en) 2009-03-26
US20090036079A1 (en) 2009-02-05
JP2010535441A (ja) 2010-11-18
US7986930B2 (en) 2011-07-26
EP2181533B1 (de) 2012-03-28
EP2181533A2 (de) 2010-05-05
WO2009016000A2 (en) 2009-02-05

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