CA2372072A1 - Synchronization of ofdm signals with improved windowing - Google Patents

Synchronization of ofdm signals with improved windowing Download PDF

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Publication number
CA2372072A1
CA2372072A1 CA002372072A CA2372072A CA2372072A1 CA 2372072 A1 CA2372072 A1 CA 2372072A1 CA 002372072 A CA002372072 A CA 002372072A CA 2372072 A CA2372072 A CA 2372072A CA 2372072 A1 CA2372072 A1 CA 2372072A1
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CA
Canada
Prior art keywords
symbol
sample
time
offset
window function
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
CA002372072A
Other languages
French (fr)
Other versions
CA2372072C (en
Inventor
Lawrence W. Yonge, Iii
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, Iii
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, Iii, Atheros Powerline Llc, Atheros Communications, Inc., Qualcomm Atheros, Inc., Qualcomm Incorporated filed Critical Intellon Corporation
Publication of CA2372072A1 publication Critical patent/CA2372072A1/en
Application granted granted Critical
Publication of CA2372072C publication Critical patent/CA2372072C/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H04L27/2689—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation
    • H04L27/2691—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation involving interference determination or cancellation

Abstract

A mechanism (80) for determining phases of a symbol for phase correlation is provided. The mechanism (80) performs a symmetric apodizing window function on a symbol sample of a symbol having a symbol period of T and a time-offset symbol sample offset from the symbol sample by T/2 to produce first windowed values for the symbol sample and second windowed values for the time-offset symbol sample. The mechanism (80) applies a time shift to re-align the time-offset symbol sample with the symbol sample and sums the second windowed values and the corresponding first windowed values. The summed values are then converted to phases. The symmetric apodizing window function is an apodizing window function having the property W j +
W(FFTSize/2+j)= constant, where FFTSize is the size of the FFT sample. The symmetric apodizing window function, such as a Hanning window, may be performed in the time of frequency domain.
CA002372072A 1999-04-26 2000-04-25 Synchronization of ofdm signals with improved windowing Expired - Lifetime CA2372072C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/300,752 1999-04-26
US09/300,752 US6074086A (en) 1999-04-26 1999-04-26 Synchronization of OFDM signals with improved windowing
PCT/US2000/011165 WO2000065710A1 (en) 1999-04-26 2000-04-25 Synchronization of ofdm signals with improved windowing

Publications (2)

Publication Number Publication Date
CA2372072A1 true CA2372072A1 (en) 2000-11-02
CA2372072C CA2372072C (en) 2009-09-29

Family

ID=23160426

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002372072A Expired - Lifetime CA2372072C (en) 1999-04-26 2000-04-25 Synchronization of ofdm signals with improved windowing

Country Status (8)

Country Link
US (1) US6074086A (en)
EP (1) EP1183774B1 (en)
JP (1) JP4478339B2 (en)
AT (1) ATE314772T1 (en)
AU (1) AU4664500A (en)
CA (1) CA2372072C (en)
DE (1) DE60025200T2 (en)
WO (1) WO2000065710A1 (en)

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Also Published As

Publication number Publication date
WO2000065710A8 (en) 2001-03-08
DE60025200T2 (en) 2006-09-07
US6074086A (en) 2000-06-13
JP2002543649A (en) 2002-12-17
WO2000065710A1 (en) 2000-11-02
EP1183774A4 (en) 2004-05-26
AU4664500A (en) 2000-11-10
DE60025200D1 (en) 2006-02-02
ATE314772T1 (en) 2006-01-15
EP1183774B1 (en) 2005-12-28
CA2372072C (en) 2009-09-29
EP1183774A2 (en) 2002-03-06
JP4478339B2 (en) 2010-06-09

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Effective date: 20200425