ATE456234T1 - Symbolzeitverfolgung für ein ofdm- kommunikationssystem - Google Patents

Symbolzeitverfolgung für ein ofdm- kommunikationssystem

Info

Publication number
ATE456234T1
ATE456234T1 AT06737927T AT06737927T ATE456234T1 AT E456234 T1 ATE456234 T1 AT E456234T1 AT 06737927 T AT06737927 T AT 06737927T AT 06737927 T AT06737927 T AT 06737927T AT E456234 T1 ATE456234 T1 AT E456234T1
Authority
AT
Austria
Prior art keywords
communications system
symbol time
time tracking
ofdm communications
ofdm
Prior art date
Application number
AT06737927T
Other languages
English (en)
Inventor
Bojan Vrcelj
Ashok Mantravadi
Fuyun Ling
Rajiv Vijayan
Michael Wang
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
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Application granted granted Critical
Publication of ATE456234T1 publication Critical patent/ATE456234T1/de

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
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2662—Symbol synchronisation
    • 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
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2662—Symbol synchronisation
    • H04L27/2665—Fine synchronisation, e.g. by positioning the FFT window
    • 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
    • H04L25/0212—Channel estimation of impulse response
    • H04L25/0216—Channel estimation of impulse response with estimation of channel length
    • 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
    • H04L25/022—Channel estimation of frequency response
    • 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
    • H04L27/2649—Demodulators
    • H04L27/265—Fourier transform demodulators, e.g. fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators
    • 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
    • H04L27/2649—Demodulators
    • H04L27/26524—Fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators in combination with other circuits for demodulation
    • H04L27/26526—Fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators in combination with other circuits for demodulation with inverse FFT [IFFT] or inverse DFT [IDFT] demodulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] receiver or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]
    • 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
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2668—Details of algorithms
    • H04L27/2673—Details of algorithms characterised by synchronisation parameters
    • H04L27/2675—Pilot or known symbols
    • 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
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2668—Details of algorithms
    • H04L27/2673—Details of algorithms characterised by synchronisation parameters
    • H04L27/2676—Blind, i.e. without using known symbols
    • H04L27/2679—Decision-aided
    • 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
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2689—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation
    • H04L27/2695—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation with channel estimation, e.g. determination of delay spread, derivative or peak tracking
    • 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
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • 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
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
AT06737927T 2005-03-10 2006-03-09 Symbolzeitverfolgung für ein ofdm- kommunikationssystem ATE456234T1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US66071705P 2005-03-10 2005-03-10
PCT/US2006/008797 WO2006099240A1 (en) 2005-03-10 2006-03-09 Symbol time tracking for an ofdm communication system

Publications (1)

Publication Number Publication Date
ATE456234T1 true ATE456234T1 (de) 2010-02-15

Family

ID=36579188

Family Applications (3)

Application Number Title Priority Date Filing Date
AT06737929T ATE459176T1 (de) 2005-03-10 2006-03-09 Trendbeeinflusstes symbolzeit-tracking für ein ofdm-kommunikationssystem
AT06737928T ATE460037T1 (de) 2005-03-10 2006-03-09 Fft-sammlungsfenster-positionierung unter verwendung von ofdm-symbolzeit-tracking- informationen
AT06737927T ATE456234T1 (de) 2005-03-10 2006-03-09 Symbolzeitverfolgung für ein ofdm- kommunikationssystem

Family Applications Before (2)

Application Number Title Priority Date Filing Date
AT06737929T ATE459176T1 (de) 2005-03-10 2006-03-09 Trendbeeinflusstes symbolzeit-tracking für ein ofdm-kommunikationssystem
AT06737928T ATE460037T1 (de) 2005-03-10 2006-03-09 Fft-sammlungsfenster-positionierung unter verwendung von ofdm-symbolzeit-tracking- informationen

Country Status (10)

Country Link
US (3) US8144824B2 (de)
EP (3) EP1872549B1 (de)
JP (4) JP2008533859A (de)
KR (3) KR100934146B1 (de)
CN (3) CN101160895B (de)
AR (1) AR052693A1 (de)
AT (3) ATE459176T1 (de)
DE (3) DE602006012641D1 (de)
TW (3) TW200706016A (de)
WO (3) WO2006099241A1 (de)

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ATE459176T1 (de) 2010-03-15
KR100893510B1 (ko) 2009-04-16
AR052693A1 (es) 2007-03-28
EP1872550A1 (de) 2008-01-02
CN101160893A (zh) 2008-04-09
CN101160893B (zh) 2013-05-22
US20060233097A1 (en) 2006-10-19
TW200708020A (en) 2007-02-16
JP2010273364A (ja) 2010-12-02
US8175123B2 (en) 2012-05-08
US20060215539A1 (en) 2006-09-28
DE602006011869D1 (de) 2010-03-11
EP1872550B1 (de) 2010-02-24
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JP4603072B2 (ja) 2010-12-22
KR100934146B1 (ko) 2009-12-29
TW200704088A (en) 2007-01-16
US20060245349A1 (en) 2006-11-02
US8165167B2 (en) 2012-04-24
JP2008533861A (ja) 2008-08-21
EP1872549B1 (de) 2010-01-20
EP1869857A1 (de) 2007-12-26
US8144824B2 (en) 2012-03-27
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JP2008533859A (ja) 2008-08-21
EP1869857B1 (de) 2010-03-03
CN101160895A (zh) 2008-04-09
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KR20070103786A (ko) 2007-10-24
KR100882165B1 (ko) 2009-02-06
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