TWI393399B - 利用無偏差調校序列之正交非平衡減輕 - Google Patents

利用無偏差調校序列之正交非平衡減輕 Download PDF

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Publication number
TWI393399B
TWI393399B TW097108425A TW97108425A TWI393399B TW I393399 B TWI393399 B TW I393399B TW 097108425 A TW097108425 A TW 097108425A TW 97108425 A TW97108425 A TW 97108425A TW I393399 B TWI393399 B TW I393399B
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TW
Taiwan
Prior art keywords
symbol
calibration sequence
symbols
sequence
sum
Prior art date
Application number
TW097108425A
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English (en)
Chinese (zh)
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TW200904093A (en
Inventor
Rabih Chrabieh
Original Assignee
Qualcomm Inc
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 US11/684,566 external-priority patent/US8428175B2/en
Priority claimed from US11/755,719 external-priority patent/US8290083B2/en
Priority claimed from US11/853,809 external-priority patent/US8081695B2/en
Priority claimed from US11/853,808 external-priority patent/US8064550B2/en
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Publication of TW200904093A publication Critical patent/TW200904093A/zh
Application granted granted Critical
Publication of TWI393399B publication Critical patent/TWI393399B/zh

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Classifications

    • 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
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • 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
    • H04L25/05—Electric or magnetic storage of signals before transmitting or retransmitting for changing the transmission rate
    • 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
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Transmitters (AREA)
TW097108425A 2007-03-09 2008-03-10 利用無偏差調校序列之正交非平衡減輕 TWI393399B (zh)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US11/684,566 US8428175B2 (en) 2007-03-09 2007-03-09 Quadrature modulation rotating training sequence
US11/755,719 US8290083B2 (en) 2007-03-09 2007-05-30 Quadrature imbalance mitigation using unbiased training sequences
US11/853,809 US8081695B2 (en) 2007-03-09 2007-09-11 Channel estimation using frequency smoothing
US11/853,808 US8064550B2 (en) 2007-03-09 2007-09-11 Quadrature imbalance estimation using unbiased training sequences

Publications (2)

Publication Number Publication Date
TW200904093A TW200904093A (en) 2009-01-16
TWI393399B true TWI393399B (zh) 2013-04-11

Family

ID=39760329

Family Applications (2)

Application Number Title Priority Date Filing Date
TW097108425A TWI393399B (zh) 2007-03-09 2008-03-10 利用無偏差調校序列之正交非平衡減輕
TW097108424A TWI446758B (zh) 2007-03-09 2008-03-10 旋轉調校序列之正交調變

Family Applications After (1)

Application Number Title Priority Date Filing Date
TW097108424A TWI446758B (zh) 2007-03-09 2008-03-10 旋轉調校序列之正交調變

Country Status (7)

Country Link
EP (2) EP2130340A2 (ja)
JP (3) JP5290209B2 (ja)
KR (2) KR101075288B1 (ja)
BR (2) BRPI0808669A2 (ja)
CA (3) CA2790073C (ja)
TW (2) TWI393399B (ja)
WO (2) WO2008112585A2 (ja)

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TWI551089B (zh) * 2014-03-31 2016-09-21 英特爾智財公司 相關性自干擾抑制

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US8385387B2 (en) * 2010-05-20 2013-02-26 Harris Corporation Time dependent equalization of frequency domain spread orthogonal frequency division multiplexing using decision feedback equalization
GB2492168A (en) 2011-06-24 2012-12-26 Penny & Giles Controls Ltd Inductive position sensor with datum adjustment
IL214096A (en) 2011-07-14 2016-02-29 Gideon Mor A system for detecting meconium in amniotic fluid
US8971465B2 (en) 2012-03-30 2015-03-03 Qualcomm Incorporated Receiver-side estimation of and compensation for signal impairments
US9143365B2 (en) 2013-01-30 2015-09-22 Qualcomm Incorporated Channel estimation using averaging and interpolation

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US20040095899A1 (en) * 1998-04-16 2004-05-20 Matsushita Electric Industrial Co., Ltd. Pilot signal transmission technique and digital communication system using same
US20040223561A1 (en) * 2003-05-07 2004-11-11 Tahat Ashraf A. Methods for multi-user broadband wireless channel estimation
US20050180518A1 (en) * 2002-09-09 2005-08-18 Infineon Technologies Ag Preamble for estimation and equalization of asymmetries between inphase and quadrature branches in multicarrier transmission systems

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JPH11136302A (ja) * 1997-10-29 1999-05-21 Fujitsu Ltd 歪補償回路
JP2001016283A (ja) * 1999-07-01 2001-01-19 Fujitsu General Ltd ディジタル無線装置
WO2001031867A1 (en) * 1999-10-27 2001-05-03 Nokia Corporation Dc offset correction in a mobile communication system
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US7248625B2 (en) * 2002-09-05 2007-07-24 Silicon Storage Technology, Inc. Compensation of I-Q imbalance in digital transceivers
TWI222279B (en) * 2002-11-20 2004-10-11 Realtek Semiconductor Corp Estimation/compensation method and device for in-phase/quadrature-phase unbalance
EP1634420B1 (en) * 2003-05-30 2013-03-06 Callahan Cellular L.L.C. Method and device for estimating iq imbalance
JP4141973B2 (ja) * 2004-03-03 2008-08-27 日本電信電話株式会社 直交変調器および直交復調器の誤差補償装置
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JP4599192B2 (ja) * 2005-03-02 2010-12-15 株式会社日立製作所 無線データ通信システム、および、無線データ通信方法
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JP4550746B2 (ja) * 2006-02-01 2010-09-22 株式会社東芝 Ｏｆｄｍを用いた無線通信方法、ｏｆｄｍ送信装置及びｏｆｄｍ受信装置
JP4983365B2 (ja) * 2006-05-16 2012-07-25 ソニー株式会社 無線通信装置
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
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CA2678160C (en) * 2007-03-09 2013-07-09 Qualcomm Incorporated Quadrature imbalance estimation using unbiased training sequences

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040095899A1 (en) * 1998-04-16 2004-05-20 Matsushita Electric Industrial Co., Ltd. Pilot signal transmission technique and digital communication system using same
WO2004025918A1 (de) * 2002-09-09 2004-03-25 Infineon Technologies Ag Präambel zur schätzung und entzerrung von unsymmetrien zwischen inphase- und quadraturzweig in mehrträger-übertragungssystemen
US20050180518A1 (en) * 2002-09-09 2005-08-18 Infineon Technologies Ag Preamble for estimation and equalization of asymmetries between inphase and quadrature branches in multicarrier transmission systems
US20040223561A1 (en) * 2003-05-07 2004-11-11 Tahat Ashraf A. Methods for multi-user broadband wireless channel estimation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI551089B (zh) * 2014-03-31 2016-09-21 英特爾智財公司 相關性自干擾抑制
US9781612B2 (en) 2014-03-31 2017-10-03 Intel IP Corporation Correlation-based self-interference suppression

Also Published As

Publication number Publication date
EP2130340A2 (en) 2009-12-09
CA2678592A1 (en) 2008-09-18
WO2008112585A3 (en) 2009-02-05
WO2008112585A2 (en) 2008-09-18
WO2008112587A3 (en) 2009-02-05
JP5726939B2 (ja) 2015-06-03
TW200901692A (en) 2009-01-01
CA2790073A1 (en) 2008-09-18
WO2008112587A2 (en) 2008-09-18
JP2010521123A (ja) 2010-06-17
JP2010521124A (ja) 2010-06-17
JP5123324B2 (ja) 2013-01-23
CA2678592C (en) 2013-06-18
BRPI0808669A2 (pt) 2014-08-26
KR20090119002A (ko) 2009-11-18
JP2013176085A (ja) 2013-09-05
KR20090118114A (ko) 2009-11-17
KR101109797B1 (ko) 2012-04-06
KR101075288B1 (ko) 2011-10-19
TW200904093A (en) 2009-01-16
TWI446758B (zh) 2014-07-21
EP2130341A2 (en) 2009-12-09
CA2678126C (en) 2013-06-25
CA2790073C (en) 2016-01-12
CA2678126A1 (en) 2008-09-18
BRPI0808676A2 (pt) 2014-08-12
JP5290209B2 (ja) 2013-09-18

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