CA2358931A1 - Synchronization of ofdm signals - Google Patents

Synchronization of ofdm signals Download PDF

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Publication number
CA2358931A1
CA2358931A1 CA002358931A CA2358931A CA2358931A1 CA 2358931 A1 CA2358931 A1 CA 2358931A1 CA 002358931 A CA002358931 A CA 002358931A CA 2358931 A CA2358931 A CA 2358931A CA 2358931 A1 CA2358931 A1 CA 2358931A1
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CA
Canada
Prior art keywords
symbol
phases
channels
hamming
received
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA002358931A
Other languages
French (fr)
Other versions
CA2358931C (en
Inventor
Lawrence W. Yonge
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qualcomm Inc
Original Assignee
Intellon Corporation
Lawrence W. Yonge
Atheros Powerline Llc
Atheros Communications, Inc.
Qualcomm Atheros, Inc.
Qualcomm Incorporated
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 Intellon Corporation, Lawrence W. Yonge, Atheros Powerline Llc, Atheros Communications, Inc., Qualcomm Atheros, Inc., Qualcomm Incorporated filed Critical Intellon Corporation
Publication of CA2358931A1 publication Critical patent/CA2358931A1/en
Application granted granted Critical
Publication of CA2358931C publication Critical patent/CA2358931C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • H04L27/2647—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
    • H04L27/2676—Blind, i.e. without using known symbols
    • H04L27/2679—Decision-aided

Abstract

A method is described for temporally aligning a received symbol that is transmitted via orthogonal channels, e.g., OFDM channels, with a reference symbol and/or an earlier received symbol. The method includes computing phases (154) of the first symbol for the orthogonal transmission channels and comparing (157) the computed phases of the first symbol with phases of the reference. The phases of the first symbol are successively displaced by a predetermined phase shift which depends on the channel frequency to obtain a correlation result. The temporal alignment is determined by detecting a correlation maximum based on the correlation result and used to synchronize the first symbol with the reference. The reference can also be an earlier received symbol to provide autocorrelation. The received symbols can be processed by applying a window function, e.g. a Hamming, Hamming or Blackman window.
CA002358931A 1999-01-20 2000-01-20 Synchronization of ofdm signals Expired - Fee Related CA2358931C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/234,289 1999-01-20
US09/234,289 US6111919A (en) 1999-01-20 1999-01-20 Synchronization of OFDM signals
PCT/US2000/001399 WO2000044120A1 (en) 1999-01-20 2000-01-20 Synchronization of ofdm signals

Publications (2)

Publication Number Publication Date
CA2358931A1 true CA2358931A1 (en) 2000-07-27
CA2358931C CA2358931C (en) 2009-09-08

Family

ID=22880748

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002358931A Expired - Fee Related CA2358931C (en) 1999-01-20 2000-01-20 Synchronization of ofdm signals

Country Status (8)

Country Link
US (1) US6111919A (en)
EP (1) EP1145470B1 (en)
JP (1) JP4751986B2 (en)
AT (1) ATE487295T1 (en)
AU (1) AU3211300A (en)
CA (1) CA2358931C (en)
DE (1) DE60045186D1 (en)
WO (1) WO2000044120A1 (en)

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Also Published As

Publication number Publication date
JP4751986B2 (en) 2011-08-17
WO2000044120A1 (en) 2000-07-27
JP2002535919A (en) 2002-10-22
US6111919A (en) 2000-08-29
WO2000044120A8 (en) 2001-06-21
EP1145470A4 (en) 2006-01-11
CA2358931C (en) 2009-09-08
ATE487295T1 (en) 2010-11-15
EP1145470A1 (en) 2001-10-17
AU3211300A (en) 2000-08-07
EP1145470B1 (en) 2010-11-03
DE60045186D1 (en) 2010-12-16

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