WO2009059250A3 - Synchronization in a broadcast ofdm system using time division multiplexed pilots - Google Patents

Synchronization in a broadcast ofdm system using time division multiplexed pilots Download PDF

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Publication number
WO2009059250A3
WO2009059250A3 PCT/US2008/082155 US2008082155W WO2009059250A3 WO 2009059250 A3 WO2009059250 A3 WO 2009059250A3 US 2008082155 W US2008082155 W US 2008082155W WO 2009059250 A3 WO2009059250 A3 WO 2009059250A3
Authority
WO
WIPO (PCT)
Prior art keywords
pilot
tdm pilot
subbands
ofdm system
synchronization
Prior art date
Application number
PCT/US2008/082155
Other languages
French (fr)
Other versions
WO2009059250A2 (en
Inventor
Fuyun Ling
Alok Kumar Gupta
Raghuraman Krishnamoorthi
Murali Ramaswamy Chari
Rajiv Vijayan
Bojan Vrcelj
Original Assignee
Qualcomm Inc
Fuyun Ling
Alok Kumar Gupta
Raghuraman Krishnamoorthi
Murali Ramaswamy Chari
Rajiv Vijayan
Bojan Vrcelj
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, Fuyun Ling, Alok Kumar Gupta, Raghuraman Krishnamoorthi, Murali Ramaswamy Chari, Rajiv Vijayan, Bojan Vrcelj filed Critical Qualcomm Inc
Priority to CN200880112781A priority Critical patent/CN101836410A/en
Priority to EP08844052A priority patent/EP2225844A2/en
Priority to JP2010532309A priority patent/JP2011502454A/en
Publication of WO2009059250A2 publication Critical patent/WO2009059250A2/en
Publication of WO2009059250A3 publication Critical patent/WO2009059250A3/en

Links

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
    • H04L27/2602—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
    • 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
    • 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
    • H04L27/2656—Frame synchronisation, e.g. packet synchronisation, time division duplex [TDD] switching point detection or subframe synchronisation
    • 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

Abstract

In an OFDM system, a transmitter broadcasts a first TDM pilot on a first set of subbands followed by a second TDM pilot on a second set of subbands in each frame. The subbands in each set are selected from among N total subbands such that (1) an OFDM symbol for the first TDM pilot contains at least Si identical pilot- 1 sequences of length Li and (2) an OFDM symbol for the second TDM pilot contains at least S2 identical pilot-2 sequences of length L2, where L2 > L1, S1 • L1 = N, and S2 • L2 = N. The transmitter may also broadcast an FDM pilot. A receiver processes the first TDM pilot to obtain frame timing (e.g., by performing correlation between different pilot- 1 sequences) and further processes the second TDM pilot to obtain symbol timing (e.g., by detecting for the start of a channel impulse response estimate derived from the second TDM pilot).
PCT/US2008/082155 2007-10-31 2008-10-31 Synchronization in a broadcast ofdm system using time division multiplexed pilots WO2009059250A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN200880112781A CN101836410A (en) 2007-10-31 2008-10-31 Use time division multiplexed pilots in the broadcasting ofdm system synchronously
EP08844052A EP2225844A2 (en) 2007-10-31 2008-10-31 Synchronization in a broadcast ofdm system using time division multiplexed pilots
JP2010532309A JP2011502454A (en) 2007-10-31 2008-10-31 Synchronization in broadcast OFDM systems using time division multiplexed pilots

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US93321307A 2007-10-31 2007-10-31
US11/933,213 2007-10-31

Publications (2)

Publication Number Publication Date
WO2009059250A2 WO2009059250A2 (en) 2009-05-07
WO2009059250A3 true WO2009059250A3 (en) 2009-07-02

Family

ID=40524563

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2008/082155 WO2009059250A2 (en) 2007-10-31 2008-10-31 Synchronization in a broadcast ofdm system using time division multiplexed pilots

Country Status (6)

Country Link
EP (1) EP2225844A2 (en)
JP (1) JP2011502454A (en)
KR (1) KR20100070377A (en)
CN (1) CN101836410A (en)
TW (1) TW200935854A (en)
WO (1) WO2009059250A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8477795B2 (en) * 2009-08-24 2013-07-02 Telefonaktiebolaget L M Ericsson (Publ) LDP IGP synchronization for broadcast networks
US8665976B2 (en) 2011-03-31 2014-03-04 Saankhya Labs Pvt. Ltd. Blind symbol synchronization scheme for OFDM system
JP5908307B2 (en) * 2012-03-06 2016-04-26 シャープ株式会社 Precoding device, wireless transmission device, wireless reception device, wireless communication system, and integrated circuit
JP2021114677A (en) * 2020-01-17 2021-08-05 株式会社東芝 Communication relay device, control method, and program

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998000946A2 (en) * 1996-06-20 1998-01-08 The Board Of Trustees Of The Leland Stanford Junior University Timing and frequency synchronization of ofdm signals
WO2005022797A2 (en) * 2003-09-02 2005-03-10 Qualcomm, Incorporated Synchronization in a broadcast ofdm system using time division multiplexed pilots
US20060209927A1 (en) * 2004-06-18 2006-09-21 Qualcomm Incorporated Signal acquisition in a wireless communication system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3690293B2 (en) * 2001-03-06 2005-08-31 株式会社日立製作所 Multi-carrier modulation synchronization method
US7548506B2 (en) * 2001-10-17 2009-06-16 Nortel Networks Limited System access and synchronization methods for MIMO OFDM communications systems and physical layer packet and preamble design
GB2420953B (en) * 2004-12-16 2008-12-03 Fujitsu Ltd Symbol timing estimation in communication systems

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998000946A2 (en) * 1996-06-20 1998-01-08 The Board Of Trustees Of The Leland Stanford Junior University Timing and frequency synchronization of ofdm signals
WO2005022797A2 (en) * 2003-09-02 2005-03-10 Qualcomm, Incorporated Synchronization in a broadcast ofdm system using time division multiplexed pilots
US20060209927A1 (en) * 2004-06-18 2006-09-21 Qualcomm Incorporated Signal acquisition in a wireless communication system

Also Published As

Publication number Publication date
JP2011502454A (en) 2011-01-20
KR20100070377A (en) 2010-06-25
CN101836410A (en) 2010-09-15
EP2225844A2 (en) 2010-09-08
TW200935854A (en) 2009-08-16
WO2009059250A2 (en) 2009-05-07

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