CA2194972A1 - Frame synchronization in multicarrier transmission systems - Google Patents

Frame synchronization in multicarrier transmission systems

Info

Publication number
CA2194972A1
CA2194972A1 CA002194972A CA2194972A CA2194972A1 CA 2194972 A1 CA2194972 A1 CA 2194972A1 CA 002194972 A CA002194972 A CA 002194972A CA 2194972 A CA2194972 A CA 2194972A CA 2194972 A1 CA2194972 A1 CA 2194972A1
Authority
CA
Canada
Prior art keywords
frame
frame synchronization
synchronizing
complex
transmission systems
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
CA002194972A
Other languages
French (fr)
Other versions
CA2194972C (en
Inventor
James T. Aslanis
Jacky S. Chow
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.)
Texas Instruments Inc
Original Assignee
James T. Aslanis
Jacky S. Chow
Amati Communications Corporation
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=23052168&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2194972(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by James T. Aslanis, Jacky S. Chow, Amati Communications Corporation filed Critical James T. Aslanis
Priority to CA002347268A priority Critical patent/CA2347268A1/en
Priority to CA002347252A priority patent/CA2347252C/en
Publication of CA2194972A1 publication Critical patent/CA2194972A1/en
Application granted granted Critical
Publication of CA2194972C publication Critical patent/CA2194972C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • H04L5/02—Channels characterised by the type of signal
    • H04L5/06—Channels characterised by the type of signal the signals being represented by different frequencies
    • 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
    • H04L27/2662—Symbol synchronisation

Abstract

A discrete multitone modulation transmission system is described in which frame synchronization is monitored at the receiver by correlating frequency domain complex amplitudes of a synchronizing frame with a stored synchronizing pattern. If the correlation result falls below a threshold, indicating a loss of frame synchronization, a plurality of correlations are performed, in each case using the stored complex amplitudes of the synchronizing frame multiplied by a respective complex value representing a respective complex derotation corresponding to a respective possible time shift of the synchronizing frame.
The best correlation result, if it exceeds another threshold, indicates a time shift for restoring frame synchronization, this being possible before the next synchronizing frame is received.
CA002194972A 1994-07-15 1995-07-11 Frame synchronization in multicarrier transmission systems Expired - Fee Related CA2194972C (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA002347268A CA2347268A1 (en) 1994-07-15 1995-07-11 Transmission system using multicarrier modulation
CA002347252A CA2347252C (en) 1994-07-15 1995-07-11 Transmitter and method for transmitting a pattern in a multicarrier modulation transmission system

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/275,409 US5627863A (en) 1994-07-15 1994-07-15 Frame synchronization in multicarrier transmission systems
US08/275,409 1994-07-15
PCT/US1995/008687 WO1996002991A1 (en) 1994-07-15 1995-07-11 Frame synchronization in multicarrier transmission systems

Related Child Applications (2)

Application Number Title Priority Date Filing Date
CA002347268A Division CA2347268A1 (en) 1994-07-15 1995-07-11 Transmission system using multicarrier modulation
CA002347252A Division CA2347252C (en) 1994-07-15 1995-07-11 Transmitter and method for transmitting a pattern in a multicarrier modulation transmission system

Publications (2)

Publication Number Publication Date
CA2194972A1 true CA2194972A1 (en) 1996-02-01
CA2194972C CA2194972C (en) 2001-09-18

Family

ID=23052168

Family Applications (3)

Application Number Title Priority Date Filing Date
CA002194972A Expired - Fee Related CA2194972C (en) 1994-07-15 1995-07-11 Frame synchronization in multicarrier transmission systems
CA002347252A Expired - Fee Related CA2347252C (en) 1994-07-15 1995-07-11 Transmitter and method for transmitting a pattern in a multicarrier modulation transmission system
CA002347268A Abandoned CA2347268A1 (en) 1994-07-15 1995-07-11 Transmission system using multicarrier modulation

Family Applications After (2)

Application Number Title Priority Date Filing Date
CA002347252A Expired - Fee Related CA2347252C (en) 1994-07-15 1995-07-11 Transmitter and method for transmitting a pattern in a multicarrier modulation transmission system
CA002347268A Abandoned CA2347268A1 (en) 1994-07-15 1995-07-11 Transmission system using multicarrier modulation

Country Status (12)

Country Link
US (5) US5627863A (en)
EP (1) EP0771496B1 (en)
JP (3) JP3303055B2 (en)
KR (1) KR100417815B1 (en)
CN (3) CN1163036C (en)
AU (1) AU696798B2 (en)
CA (3) CA2194972C (en)
DE (2) DE29521458U1 (en)
DK (1) DK0771496T3 (en)
ES (1) ES2144132T3 (en)
FI (1) FI115685B (en)
WO (1) WO1996002991A1 (en)

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