WO2006099532A3 - Automatic frequency control for a wireless communication system with multiple subcarriers - Google Patents

Automatic frequency control for a wireless communication system with multiple subcarriers Download PDF

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Publication number
WO2006099532A3
WO2006099532A3 PCT/US2006/009475 US2006009475W WO2006099532A3 WO 2006099532 A3 WO2006099532 A3 WO 2006099532A3 US 2006009475 W US2006009475 W US 2006009475W WO 2006099532 A3 WO2006099532 A3 WO 2006099532A3
Authority
WO
WIPO (PCT)
Prior art keywords
frequency
frequency error
error estimate
ofdm symbol
frequency control
Prior art date
Application number
PCT/US2006/009475
Other languages
French (fr)
Other versions
WO2006099532A2 (en
Inventor
Vinay Murthy
Alok Gupta
Seong Taek Chung
Fuyun Ling
Original Assignee
Qualcomm Inc
Vinay Murthy
Alok Gupta
Seong Taek Chung
Fuyun Ling
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, Vinay Murthy, Alok Gupta, Seong Taek Chung, Fuyun Ling filed Critical Qualcomm Inc
Priority to CN2006800133717A priority Critical patent/CN101313546B/en
Priority to BRPI0608230-0A priority patent/BRPI0608230A2/en
Priority to JP2008501076A priority patent/JP2008544591A/en
Priority to CA002600489A priority patent/CA2600489A1/en
Priority to EP06738527A priority patent/EP1869767A2/en
Publication of WO2006099532A2 publication Critical patent/WO2006099532A2/en
Publication of WO2006099532A3 publication Critical patent/WO2006099532A3/en

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/02—Digital function generators
    • G06F1/03—Digital function generators working, at least partly, by table look-up
    • G06F1/035—Reduction of table size
    • G06F1/0353—Reduction of table size by using symmetrical properties of the function, e.g. using most significant bits for quadrant control
    • 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
    • H04L27/2657—Carrier synchronisation
    • H04L27/2659—Coarse or integer frequency offset determination and 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
    • H04L27/2657—Carrier synchronisation
    • H04L27/266—Fine or fractional frequency offset determination and 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
    • 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
    • H04L27/2678—Blind, i.e. without using known symbols using cyclostationarities, e.g. cyclic prefix or postfix
    • 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
    • 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

Abstract

Techniques for performing frequency control in an OFDM system are described. In one aspect, frequency acquisition is performed based on a received pilot, and frequency tracking is performed based on received OFDM symbols. For frequency acquisition, an initial frequency error estimate may be derived based on the received pilot, and an automatic frequency control (AFC) loop may be initialized with the initial frequency error estimate. For frequency tracking, a frequency error estimate may be derived for each received OFDM symbol, and the AFC loop may be updated with the frequency error estimate. Frequency error in input samples is corrected by the AFC loop with the initial frequency error estimate as well as the frequency error estimate for each received OFDM symbol. In another aspect, a variable number of samples of a received OFDM symbol are selected, e.g., based on the received OFDM symbol timing, for use for frequency error estimation.
PCT/US2006/009475 2005-03-11 2006-03-13 Automatic frequency control for a wireless communication system with multiple subcarriers WO2006099532A2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN2006800133717A CN101313546B (en) 2005-03-11 2006-03-13 Method and device for automatic frequency control for a wireless communication system with multiple subcarriers
BRPI0608230-0A BRPI0608230A2 (en) 2005-03-11 2006-03-13 automatic frequency control for a multiple subcarrier wireless communication system
JP2008501076A JP2008544591A (en) 2005-03-11 2006-03-13 Automatic frequency control for wireless communication systems using multiple subcarriers
CA002600489A CA2600489A1 (en) 2005-03-11 2006-03-13 Automatic frequency control for a wireless communication system with multiple subcarriers
EP06738527A EP1869767A2 (en) 2005-03-11 2006-03-13 Automatic frequency control for a wireless communication system with multiple subcarriers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US66091405P 2005-03-11 2005-03-11
US60/660,914 2005-03-11

Publications (2)

Publication Number Publication Date
WO2006099532A2 WO2006099532A2 (en) 2006-09-21
WO2006099532A3 true WO2006099532A3 (en) 2008-07-24

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2006/009475 WO2006099532A2 (en) 2005-03-11 2006-03-13 Automatic frequency control for a wireless communication system with multiple subcarriers

Country Status (8)

Country Link
US (1) US8009775B2 (en)
EP (1) EP1869767A2 (en)
JP (1) JP2008544591A (en)
CN (1) CN101313546B (en)
BR (1) BRPI0608230A2 (en)
CA (1) CA2600489A1 (en)
SG (1) SG160381A1 (en)
WO (1) WO2006099532A2 (en)

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Also Published As

Publication number Publication date
US20060215778A1 (en) 2006-09-28
US8009775B2 (en) 2011-08-30
EP1869767A2 (en) 2007-12-26
SG160381A1 (en) 2010-04-29
BRPI0608230A2 (en) 2009-11-24
CA2600489A1 (en) 2006-09-21
JP2008544591A (en) 2008-12-04
CN101313546B (en) 2013-01-16
WO2006099532A2 (en) 2006-09-21
CN101313546A (en) 2008-11-26

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