WO2007096663A3 - Ofdem channel estimation systems - Google Patents

Ofdem channel estimation systems Download PDF

Info

Publication number
WO2007096663A3
WO2007096663A3 PCT/GB2007/050054 GB2007050054W WO2007096663A3 WO 2007096663 A3 WO2007096663 A3 WO 2007096663A3 GB 2007050054 W GB2007050054 W GB 2007050054W WO 2007096663 A3 WO2007096663 A3 WO 2007096663A3
Authority
WO
WIPO (PCT)
Prior art keywords
input
filter
coupled
phase rotation
ofdem
Prior art date
Application number
PCT/GB2007/050054
Other languages
French (fr)
Other versions
WO2007096663A2 (en
Inventor
Conor Mcnally
Original Assignee
Frontier Silicon Ltd
Conor Mcnally
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 EP20060075405 external-priority patent/EP1821407B8/en
Application filed by Frontier Silicon Ltd, Conor Mcnally filed Critical Frontier Silicon Ltd
Publication of WO2007096663A2 publication Critical patent/WO2007096663A2/en
Publication of WO2007096663A3 publication Critical patent/WO2007096663A3/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • H03H17/04—Recursive filters
    • H03H17/0416—Recursive filters with input-sampling frequency and output-delivery frequency which differ, e.g. extrapolation; Anti-aliasing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
    • H04L25/023—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols
    • H04L25/0232—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols by interpolation between sounding 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
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2657—Carrier synchronisation

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Mathematical Physics (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Analogue/Digital Conversion (AREA)

Abstract

A digital filter, the filter comprising: an input to receive complex-valued input samples; an up-sampler coupled to said input to provide an up-sampled output comprising an increased number of said input samples; a filter coupled to said up-sampler to filter said up-sampled output and provide a filtered output; a phase rotation estimator coupled to said input and to said filtered output to estimate a phase rotation of a said input sample by said filter; and a phase compensator coupled to said filtered output and to said phase rotation estimator to compensate said filtered output for said estimated phase rotation.
PCT/GB2007/050054 2006-02-21 2007-02-09 Ofdem channel estimation systems WO2007096663A2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP06075405.8 2006-02-21
EP20060075405 EP1821407B8 (en) 2006-02-21 2006-02-21 OFDM channel estimation systems
US77703206P 2006-02-27 2006-02-27
US60/777,032 2006-02-27

Publications (2)

Publication Number Publication Date
WO2007096663A2 WO2007096663A2 (en) 2007-08-30
WO2007096663A3 true WO2007096663A3 (en) 2007-11-01

Family

ID=37969974

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2007/050054 WO2007096663A2 (en) 2006-02-21 2007-02-09 Ofdem channel estimation systems

Country Status (1)

Country Link
WO (1) WO2007096663A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101729469B (en) * 2009-11-25 2013-01-23 北京天碁科技有限公司 Multi-rate processing system

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009043200A1 (en) * 2007-09-30 2009-04-09 Thomson Licensing Interpolation method and apparatus using tracking filter in multi-carrier receiver
WO2009108090A1 (en) * 2008-02-27 2009-09-03 Telefonaktiebolaget Lm Ericsson (Publ) Correction of a frequency offset in an ofdm system
JP5926680B2 (en) 2009-07-28 2016-05-25 リガセプト・エルエルシー Broad range of ErbB ligand binding molecules and methods for preparing and using the same
CN113037590B (en) * 2021-03-02 2022-06-17 成都爱瑞无线科技有限公司 Time delay estimation method and device used in communication system
CN113253214B (en) * 2021-04-23 2022-07-15 中国电子科技集团公司第二十九研究所 Inter-channel phase correction method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999060940A1 (en) * 1998-05-28 1999-12-02 Glenayre Electronics, Inc. Forward-backward channel interpolator
WO2003105432A1 (en) * 2002-06-10 2003-12-18 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V. Method and device for carrying out a channel estimation in the presence of phase shifts
EP1580948A2 (en) * 2004-03-26 2005-09-28 Sony United Kingdom Limited Receiver

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999060940A1 (en) * 1998-05-28 1999-12-02 Glenayre Electronics, Inc. Forward-backward channel interpolator
WO2003105432A1 (en) * 2002-06-10 2003-12-18 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V. Method and device for carrying out a channel estimation in the presence of phase shifts
EP1580948A2 (en) * 2004-03-26 2005-09-28 Sony United Kingdom Limited Receiver

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
HUTTER A A ET AL: "Channel estimation for mobile OFDM systems", VEHICULAR TECHNOLOGY CONFERENCE, 1999. VTC 1999 - FALL. IEEE VTS 50TH AMSTERDAM, NETHERLANDS 19-22 SEPT. 1999, PISCATAWAY, NJ, USA,IEEE, US, vol. 1, 19 September 1999 (1999-09-19), pages 305 - 309, XP010352881, ISBN: 0-7803-5435-4 *
KIM C W ET AL: "Approximately linear phase IIR polyphase filter design", SPEECH PROCESSING 2, VLSI, UNDERWATER SIGNAL PROCESSING. TORONTO, MAY 14 - 17, 1991, INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH & SIGNAL PROCESSING. ICASSP, NEW YORK, IEEE, US, vol. VOL. 2 CONF. 16, 14 April 1991 (1991-04-14), pages 1621 - 1624, XP010043211, ISBN: 0-7803-0003-3 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101729469B (en) * 2009-11-25 2013-01-23 北京天碁科技有限公司 Multi-rate processing system

Also Published As

Publication number Publication date
WO2007096663A2 (en) 2007-08-30

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