TWI446758B - 旋轉調校序列之正交調變 - Google Patents

旋轉調校序列之正交調變 Download PDF

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Publication number
TWI446758B
TWI446758B TW097108424A TW97108424A TWI446758B TW I446758 B TWI446758 B TW I446758B TW 097108424 A TW097108424 A TW 097108424A TW 97108424 A TW97108424 A TW 97108424A TW I446758 B TWI446758 B TW I446758B
Authority
TW
Taiwan
Prior art keywords
transmitting
complex value
calibration
sequence
modulation
Prior art date
Application number
TW097108424A
Other languages
English (en)
Chinese (zh)
Other versions
TW200901692A (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 TW200901692A publication Critical patent/TW200901692A/zh
Application granted granted Critical
Publication of TWI446758B publication Critical patent/TWI446758B/zh

Links

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)
TW097108424A 2007-03-09 2008-03-10 旋轉調校序列之正交調變 TWI446758B (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
TW200901692A TW200901692A (en) 2009-01-01
TWI446758B true TWI446758B (zh) 2014-07-21

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 Before (1)

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

Country Status (7)

Country Link
EP (2) EP2130341A2 (ja)
JP (3) JP5123324B2 (ja)
KR (2) KR101075288B1 (ja)
BR (2) BRPI0808669A2 (ja)
CA (3) CA2678592C (ja)
TW (2) TWI393399B (ja)
WO (2) WO2008112587A2 (ja)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
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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
US9781612B2 (en) * 2014-03-31 2017-10-03 Intel IP Corporation Correlation-based self-interference suppression

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TWI222279B (en) * 2002-11-20 2004-10-11 Realtek Semiconductor Corp Estimation/compensation method and device for in-phase/quadrature-phase unbalance
US7385617B2 (en) * 2003-05-07 2008-06-10 Illinois Institute Of Technology Methods for multi-user broadband wireless channel estimation
JP2006526348A (ja) * 2003-05-30 2006-11-16 コーニンクレッカ　フィリップス　エレクトロニクス　エヌ　ヴィ Ｉｑ不均衡を推定するための方法および装置
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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JP2007142674A (ja) * 2005-11-16 2007-06-07 Matsushita Electric Ind Co Ltd マルチキャリア送信装置、マルチキャリア受信装置及び通信方法
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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
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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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KR101093338B1 (ko) * 2007-03-09 2011-12-14 콸콤 인코포레이티드 주파수 평탄화를 이용한 채널 추정

Also Published As

Publication number Publication date
TW200901692A (en) 2009-01-01
TW200904093A (en) 2009-01-16
WO2008112587A3 (en) 2009-02-05
BRPI0808669A2 (pt) 2014-08-26
EP2130341A2 (en) 2009-12-09
KR20090118114A (ko) 2009-11-17
CA2678592A1 (en) 2008-09-18
TWI393399B (zh) 2013-04-11
KR101075288B1 (ko) 2011-10-19
JP2013176085A (ja) 2013-09-05
CA2678126A1 (en) 2008-09-18
CA2790073A1 (en) 2008-09-18
WO2008112585A3 (en) 2009-02-05
JP5290209B2 (ja) 2013-09-18
BRPI0808676A2 (pt) 2014-08-12
KR20090119002A (ko) 2009-11-18
JP2010521124A (ja) 2010-06-17
WO2008112585A2 (en) 2008-09-18
CA2678126C (en) 2013-06-25
JP5123324B2 (ja) 2013-01-23
CA2790073C (en) 2016-01-12
JP5726939B2 (ja) 2015-06-03
JP2010521123A (ja) 2010-06-17
KR101109797B1 (ko) 2012-04-06
EP2130340A2 (en) 2009-12-09
CA2678592C (en) 2013-06-18
WO2008112587A2 (en) 2008-09-18

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