WO2007069203A3 - Ofdm system synchronization using correlations with known pilot patterns - Google Patents

Ofdm system synchronization using correlations with known pilot patterns Download PDF

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Publication number
WO2007069203A3
WO2007069203A3 PCT/IB2006/054791 IB2006054791W WO2007069203A3 WO 2007069203 A3 WO2007069203 A3 WO 2007069203A3 IB 2006054791 W IB2006054791 W IB 2006054791W WO 2007069203 A3 WO2007069203 A3 WO 2007069203A3
Authority
WO
WIPO (PCT)
Prior art keywords
pilot
frequency
domain
symbols
matrixes
Prior art date
Application number
PCT/IB2006/054791
Other languages
French (fr)
Other versions
WO2007069203A2 (en
Inventor
Xiaobo Zhang
Ni Ma
Qi Zhou
Original Assignee
Koninkl Philips Electronics Nv
Xiaobo Zhang
Ni Ma
Qi Zhou
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 Koninkl Philips Electronics Nv, Xiaobo Zhang, Ni Ma, Qi Zhou filed Critical Koninkl Philips Electronics Nv
Publication of WO2007069203A2 publication Critical patent/WO2007069203A2/en
Publication of WO2007069203A3 publication Critical patent/WO2007069203A3/en

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
    • H04L5/003—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
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H04L27/2613—Structure of the reference 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
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H04L27/2613—Structure of the reference signals
    • H04L27/26134—Pilot insertion in the transmitter chain, e.g. pilot overlapping with data, insertion in time or frequency domain
    • 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
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

The invention relates to system synchronization in an orthogonal frequency division multiplexing communication system having a plurality of sub-carriers. The transmission signal provided by the invention comprises a plurality of frequency-domain symbols. Each frequency-domain symbol comprises both pilot elements and data elements that are modulated on different sub-carriers. The pilot elements in the plurality of symbols compose at least two pilot matrixes that have predefined relationship in frequency domain. At transmitting side, the plurality of symbols is transformed from frequency domain to time domain via Inverse Discrete Fourier Transform. At receiving side, the sampled time- domain symbols are transformed to frequency-domain symbols via Discrete Fourier Transform and at least two pilot matrixes having predefined relationship in frequency domain are retrieved based on pilot elements extracted from the plurality of frequency- domain symbols. Then the system synchronization can be obtained based on correlation of any two of the pilot matrixes. As the pilot timeslot carries pilot information and data information, the invention can improve transmission efficiency.
PCT/IB2006/054791 2005-12-15 2006-12-13 Ofdm system synchronization using correlations with known pilot patterns WO2007069203A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200510136947.6 2005-12-15
CN200510136947 2005-12-15

Publications (2)

Publication Number Publication Date
WO2007069203A2 WO2007069203A2 (en) 2007-06-21
WO2007069203A3 true WO2007069203A3 (en) 2007-10-11

Family

ID=38080834

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2006/054791 WO2007069203A2 (en) 2005-12-15 2006-12-13 Ofdm system synchronization using correlations with known pilot patterns

Country Status (1)

Country Link
WO (1) WO2007069203A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8837616B2 (en) * 2012-07-31 2014-09-16 Exelis Inc. Equalization of a distributed pilot OFDM signal
US9882620B2 (en) * 2014-09-24 2018-01-30 Mediatek Inc. Synchronization in a beamforming system
US10396873B2 (en) 2014-09-24 2019-08-27 Mediatek Inc. Control signaling in a beamforming system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5867478A (en) * 1997-06-20 1999-02-02 Motorola, Inc. Synchronous coherent orthogonal frequency division multiplexing system, method, software and device
EP0938193A1 (en) * 1998-02-18 1999-08-25 Sony International (Europe) GmbH Header structure for TDD systems
US20030072255A1 (en) * 2001-10-17 2003-04-17 Jianglei Ma System access and synchronization methods for MIMO OFDM communications systems and physical layer packet and preamble design
EP1313283A2 (en) * 2001-11-16 2003-05-21 Mitsubishi Denki Kabushiki Kaisha Timing synchronization for OFDM-based wireless networks

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5867478A (en) * 1997-06-20 1999-02-02 Motorola, Inc. Synchronous coherent orthogonal frequency division multiplexing system, method, software and device
EP0938193A1 (en) * 1998-02-18 1999-08-25 Sony International (Europe) GmbH Header structure for TDD systems
US20030072255A1 (en) * 2001-10-17 2003-04-17 Jianglei Ma System access and synchronization methods for MIMO OFDM communications systems and physical layer packet and preamble design
EP1313283A2 (en) * 2001-11-16 2003-05-21 Mitsubishi Denki Kabushiki Kaisha Timing synchronization for OFDM-based wireless networks

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
HSIEH M-H ET AL: "CHANNEL ESTIMATION FOR OFDM SYSTEMS BASED ON COMB-TYPE PILOT ARRANGEMENT IN FREQUENCY SELECTIVE FADING CHANNELS", IEEE TRANSACTIONS ON CONSUMER ELECTRONICS, vol. 44, no. 1, 1 February 1998 (1998-02-01), IEEE SERVICE CENTER, NEW YORK, NY, US, pages 217 - 225, XP000779270, ISSN: 0098-3063 *
RAGHU MYSORE RAO ET AL: "Overhead optimization in a MIMO-OFDM testbed based on MMSE MIMO decoding", VEHICULAR TECHNOLOGY CONFERENCE, 2004, 26 September 2004 (2004-09-26) - 29 September 2004 (2004-09-29), IEEE, PISCATAWAY, NJ, USA, pages 1468 - 1472, XP010786868, ISBN: 0-7803-8521-7 *

Also Published As

Publication number Publication date
WO2007069203A2 (en) 2007-06-21

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