BRPI0608338A2 - aquisição de temporização fina - Google Patents

aquisição de temporização fina

Info

Publication number
BRPI0608338A2
BRPI0608338A2 BRPI0608338-2A BRPI0608338A BRPI0608338A2 BR PI0608338 A2 BRPI0608338 A2 BR PI0608338A2 BR PI0608338 A BRPI0608338 A BR PI0608338A BR PI0608338 A2 BRPI0608338 A2 BR PI0608338A2
Authority
BR
Brazil
Prior art keywords
timing acquisition
timing
received
ofdm signal
fine timing
Prior art date
Application number
BRPI0608338-2A
Other languages
English (en)
Inventor
Fuyun Ling
Raghuraman Krishnamoorthi
Bojan Vrcelj
Vinay Murthy
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
Publication of BRPI0608338A2 publication Critical patent/BRPI0608338A2/pt

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
    • H04L27/2668—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
    • 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
    • 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
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2656—Frame synchronisation, e.g. packet synchronisation, time division duplex [TDD] switching point detection or subframe 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
    • H04L27/2663—Coarse synchronisation, e.g. by correlation
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Discrete Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Power Engineering (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

AQUISIçãO DE TEMPORIZAçAO FINA. Um método para sincronização de temporização de um receptor a um sinal OFDM recebido é descrito. Uma primeira aquisição de temporização é realizada com um primeiro piloto TDM recebido para determinar uma estimativa de temporização grosseira do sinal OFDM recebido. Uma segunda aquisição de temporização é realizada com um segundo piloto TDM para determinar uma estimativa de temporização fina para um símbolo OFDM do sinal OFDM recebido. Na segunda aquisição de temporização, a energia acumulada das derivações de canal através de uma janela de detecção é determinada e uma borda traseira da curva de energia acumulada é detectada. Uma localização de janela de coleta FT para os simbolos OFDM subseqUentes é ajustada de acordo com as informações da borda traseira.
BRPI0608338-2A 2005-03-10 2006-03-10 aquisição de temporização fina BRPI0608338A2 (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US66090105P 2005-03-10 2005-03-10
PCT/US2006/008977 WO2006099343A1 (en) 2005-03-10 2006-03-10 Fine timing acquisition

Publications (1)

Publication Number Publication Date
BRPI0608338A2 true BRPI0608338A2 (pt) 2009-12-01

Family

ID=36603303

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0608338-2A BRPI0608338A2 (pt) 2005-03-10 2006-03-10 aquisição de temporização fina

Country Status (10)

Country Link
US (1) US20060221810A1 (pt)
EP (1) EP1856876A1 (pt)
JP (1) JP2008533867A (pt)
KR (1) KR100947794B1 (pt)
CN (1) CN101189847B (pt)
BR (1) BRPI0608338A2 (pt)
CA (1) CA2600561A1 (pt)
RU (1) RU2365055C2 (pt)
TW (1) TW200704066A (pt)
WO (1) WO2006099343A1 (pt)

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Also Published As

Publication number Publication date
CN101189847A (zh) 2008-05-28
CA2600561A1 (en) 2006-09-21
CN101189847B (zh) 2011-08-10
KR20070110930A (ko) 2007-11-20
RU2365055C2 (ru) 2009-08-20
WO2006099343A1 (en) 2006-09-21
EP1856876A1 (en) 2007-11-21
TW200704066A (en) 2007-01-16
US20060221810A1 (en) 2006-10-05
JP2008533867A (ja) 2008-08-21
RU2007137500A (ru) 2009-04-20
KR100947794B1 (ko) 2010-03-15

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