WO2008073756A3 - Automatic frequency offset compensation in a tdd wireless ofdm communication system - Google Patents

Automatic frequency offset compensation in a tdd wireless ofdm communication system Download PDF

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Publication number
WO2008073756A3
WO2008073756A3 PCT/US2007/086340 US2007086340W WO2008073756A3 WO 2008073756 A3 WO2008073756 A3 WO 2008073756A3 US 2007086340 W US2007086340 W US 2007086340W WO 2008073756 A3 WO2008073756 A3 WO 2008073756A3
Authority
WO
WIPO (PCT)
Prior art keywords
communication system
frequency offset
offset compensation
automatic frequency
ofdm communication
Prior art date
Application number
PCT/US2007/086340
Other languages
French (fr)
Other versions
WO2008073756A2 (en
Inventor
Haito Wang
Original Assignee
Adaptix Inc
Haito Wang
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
Priority claimed from CNA2006101623109A external-priority patent/CN101202725A/en
Application filed by Adaptix Inc, Haito Wang filed Critical Adaptix Inc
Publication of WO2008073756A2 publication Critical patent/WO2008073756A2/en
Publication of WO2008073756A3 publication Critical patent/WO2008073756A3/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
    • H04L27/2657—Carrier synchronisation
    • H04L27/2659—Coarse or integer frequency offset determination and 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
    • H04L27/2657—Carrier synchronisation
    • H04L27/266—Fine or fractional frequency offset determination and 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
    • H04L27/2675—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
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing
    • H04L5/1484—Two-way operation using the same type of signal, i.e. duplex using time-sharing operating bytewise
    • 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

Abstract

Offsets in the transmit clock in a wireless communication system are corrected by using data distributed over many frequencies. In the time domain the system uses separate copies of the same signal transmitted with a known spacing in terms of transmit clock signals. The variation of timing between the received signals yields an initial estimate that then is used in a closed loop tracking arrangement to yield and compensate for unpredictable rate changes caused by, for example, jitter, Doppler or thermal drift. The frequency offset for one channel can then be used to calculate the offset for other channels.
PCT/US2007/086340 2006-12-11 2007-12-04 Automatic frequency offset compensation in a tdd wireless ofdm communication system WO2008073756A2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CNA2006101623109A CN101202725A (en) 2006-12-11 2006-12-11 Auto frequency offset compensation in TDD wireless OFDM communication system
CN200610162310.9 2006-12-11
US11/651,249 2007-01-09
US11/651,249 US7782985B2 (en) 2006-12-11 2007-01-09 Automatic frequency offset compensation in a TDD wireless OFDM communication system

Publications (2)

Publication Number Publication Date
WO2008073756A2 WO2008073756A2 (en) 2008-06-19
WO2008073756A3 true WO2008073756A3 (en) 2008-09-12

Family

ID=39512400

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/086340 WO2008073756A2 (en) 2006-12-11 2007-12-04 Automatic frequency offset compensation in a tdd wireless ofdm communication system

Country Status (1)

Country Link
WO (1) WO2008073756A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110392007A (en) * 2018-04-16 2019-10-29 晨星半导体股份有限公司 Nonlinear Transformation in Frequency Offset Estimation device and carrier frequency bias estimation

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6175555B1 (en) * 1997-02-24 2001-01-16 At&T Wireless Svcs. Inc. Transmit/receive compensation
US20030231728A1 (en) * 2002-06-17 2003-12-18 Oki Techno Centre (Singapore) Pte Ltd. Frequency estimation in a burst radio receiver
US20040042385A1 (en) * 2002-08-31 2004-03-04 Ki-Yun Kim Preamble design for frequency offset estimation and channel equalization in burst OFDM transmission system
US20050201268A1 (en) * 2004-03-12 2005-09-15 Tsuguhide Aoki OFDM signal transmission method and apparatus
US20060176802A1 (en) * 2005-02-04 2006-08-10 Samsung Electronics Co., Ltd. Apparatus and method for compensating for frequency offset in wireless communication system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6175555B1 (en) * 1997-02-24 2001-01-16 At&T Wireless Svcs. Inc. Transmit/receive compensation
US20030231728A1 (en) * 2002-06-17 2003-12-18 Oki Techno Centre (Singapore) Pte Ltd. Frequency estimation in a burst radio receiver
US20040042385A1 (en) * 2002-08-31 2004-03-04 Ki-Yun Kim Preamble design for frequency offset estimation and channel equalization in burst OFDM transmission system
US20050201268A1 (en) * 2004-03-12 2005-09-15 Tsuguhide Aoki OFDM signal transmission method and apparatus
US20060176802A1 (en) * 2005-02-04 2006-08-10 Samsung Electronics Co., Ltd. Apparatus and method for compensating for frequency offset in wireless communication system

Also Published As

Publication number Publication date
WO2008073756A2 (en) 2008-06-19

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