WO2002067527A3 - Multicarrier equalisation using multiplication by a leakage matrix - Google Patents

Multicarrier equalisation using multiplication by a leakage matrix Download PDF

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Publication number
WO2002067527A3
WO2002067527A3 PCT/IB2002/000129 IB0200129W WO02067527A3 WO 2002067527 A3 WO2002067527 A3 WO 2002067527A3 IB 0200129 W IB0200129 W IB 0200129W WO 02067527 A3 WO02067527 A3 WO 02067527A3
Authority
WO
WIPO (PCT)
Prior art keywords
multiplication
receiver
amplitudes
multicarrier
multicarrier signal
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.)
Ceased
Application number
PCT/IB2002/000129
Other languages
French (fr)
Other versions
WO2002067527A2 (en
Inventor
Alexei Gorokhov
Johan P M G Linnartz
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.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
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 Koninklijke Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Priority to JP2002566927A priority Critical patent/JP2004519900A/en
Priority to EP02742450A priority patent/EP1364507A2/en
Priority to US10/078,952 priority patent/US7054354B2/en
Publication of WO2002067527A2 publication Critical patent/WO2002067527A2/en
Publication of WO2002067527A3 publication Critical patent/WO2002067527A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03159—Arrangements for removing intersymbol interference operating in the 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
    • 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
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L2025/0335—Arrangements for removing intersymbol interference characterised by the type of transmission
    • H04L2025/03375—Passband transmission
    • H04L2025/03414—Multicarrier
    • 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
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L2025/03433—Arrangements for removing intersymbol interference characterised by equaliser structure
    • H04L2025/03439—Fixed structures
    • H04L2025/03522—Frequency domain
    • 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
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L2025/03592—Adaptation methods
    • H04L2025/03598—Algorithms
    • H04L2025/03611—Iterative algorithms
    • H04L2025/03617—Time recursive algorithms
    • H04L2025/03624—Zero-forcing
    • 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
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L2025/03592—Adaptation methods
    • H04L2025/03598—Algorithms
    • H04L2025/03611—Iterative algorithms
    • H04L2025/03656—Initialisation
    • H04L2025/03662—Initialisation to a fixed value
    • 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
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L2025/03592—Adaptation methods
    • H04L2025/03598—Algorithms
    • H04L2025/03611—Iterative algorithms
    • H04L2025/03656—Initialisation
    • H04L2025/03668—Initialisation to the value at the end of a previous adaptation period

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Noise Elimination (AREA)
  • Radio Relay Systems (AREA)

Abstract

Described is a transmission system for transmitting a multicarrier signal from a transmitter (10) to a receiver (20). The multicarrier signal comprises a plurality of subcarriers. The receiver (20) comprises a channel estimator (28) for estimating amplitudes of the subcarriers and for estimating time derivatives of the amplitudes. The receiver (20) further comprises an equalizer (24) for canceling intercarrier interference included in the received multicarrier signal in dependence on the estimated amplitudes and derivatives (29). The receiver (20) comprises a multiplication by a leakage matrix , and the multiplication is implemented in the following sequence N-point IFFT (82), N pointwise multiplications (84) and an N-point FFT (86).
PCT/IB2002/000129 2001-02-22 2002-01-16 Multicarrier equalisation using multiplication by a leakage matrix Ceased WO2002067527A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2002566927A JP2004519900A (en) 2001-02-22 2002-01-16 Multicarrier transmission system with reduced computational leak matrix multiplier
EP02742450A EP1364507A2 (en) 2001-02-22 2002-01-16 Multicarrier transmission system with reduced complexity leakage matrix multiplication
US10/078,952 US7054354B2 (en) 2001-02-22 2002-02-19 Multicarrier transmission system with reduced complexity leakage matrix multiplication

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP01200686.2 2001-02-22
EP01200686 2001-02-22

Publications (2)

Publication Number Publication Date
WO2002067527A2 WO2002067527A2 (en) 2002-08-29
WO2002067527A3 true WO2002067527A3 (en) 2002-11-28

Family

ID=8179937

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2002/000129 Ceased WO2002067527A2 (en) 2001-02-22 2002-01-16 Multicarrier equalisation using multiplication by a leakage matrix

Country Status (5)

Country Link
US (1) US7054354B2 (en)
EP (1) EP1364507A2 (en)
JP (1) JP2004519900A (en)
CN (1) CN1224228C (en)
WO (1) WO2002067527A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7428279B2 (en) 2003-03-03 2008-09-23 Interdigital Technology Corporation Reduced complexity sliding window based equalizer
US7609794B2 (en) 2003-03-03 2009-10-27 Interdigital Technology Corporation Reduced complexity sliding window based equalizer

Families Citing this family (58)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001063870A1 (en) * 2000-02-22 2001-08-30 Koninklijke Philips Electronics N.V. Multicarrier receiver with channel estimator
US7418026B2 (en) * 2002-05-09 2008-08-26 Sony United Kingdom Limited Receiver for a multi-carrier modulated symbol
US7212569B1 (en) * 2002-06-28 2007-05-01 At&T Corp. Frequency domain decision feedback equalizer
US7161896B1 (en) * 2002-08-12 2007-01-09 Cisco Systems Wireless Networking (Australia) Pty Limited Channel estimation in a multicarrier radio receiver
EP1396971A1 (en) * 2002-09-05 2004-03-10 Abb Research Ltd. Method for demodulating OFDM signals with sampling rate mismatch
US7715508B2 (en) * 2005-11-15 2010-05-11 Tensorcomm, Incorporated Iterative interference cancellation using mixed feedback weights and stabilizing step sizes
US8005128B1 (en) 2003-09-23 2011-08-23 Rambus Inc. Methods for estimation and interference cancellation for signal processing
KR100983297B1 (en) * 2003-01-10 2010-09-24 인터디지탈 테크날러지 코포레이션 Generalized Two-stage Data Estimation
JP3998685B2 (en) * 2003-03-05 2007-10-31 富士通株式会社 Multicarrier signal reception processing method and multicarrier reception apparatus to which the method is applied
CN1802828A (en) * 2003-06-11 2006-07-12 皇家飞利浦电子股份有限公司 Receiver for a multi-carrier communication system
US20050190800A1 (en) * 2003-12-17 2005-09-01 Intel Corporation Method and apparatus for estimating noise power per subcarrier in a multicarrier system
CN1961548A (en) * 2004-05-28 2007-05-09 皇家飞利浦电子股份有限公司 A method for signal processing and a signal processor in an OFDM system
BRPI0511591A (en) * 2004-05-28 2008-01-02 Koninkl Philips Electronics Nv method for processing ofdm encoded digital signals, signal processor and receiver arranged to receive ofdm encoded digital signals, mobile device, and telecommunication system
RU2006146805A (en) * 2004-05-28 2008-07-10 Конинклейке Филипс Электроникс Н.В. (Nl) SIGNAL PROCESSING METHOD AND SIGNAL PROCESSOR IN OFDM SYSTEM
US7660340B2 (en) * 2004-06-22 2010-02-09 Alcatel-Lucent Usa Inc. Method of receiver processing of CDMA signals in a CDMA system
WO2006006238A1 (en) * 2004-07-14 2006-01-19 Fujitsu Limited Multicarrier receiving method and multicarrier receiving apparatus
TWI256219B (en) * 2004-08-09 2006-06-01 Realtek Semiconductor Corp Interference alleviation equalizer of multi-carrier communication system and method thereof
GB2420953B (en) * 2004-12-16 2008-12-03 Fujitsu Ltd Symbol timing estimation in communication systems
US7711075B2 (en) 2005-11-15 2010-05-04 Tensorcomm Incorporated Iterative interference cancellation using mixed feedback weights and stabilizing step sizes
US7991088B2 (en) 2005-11-15 2011-08-02 Tommy Guess Iterative interference cancellation using mixed feedback weights and stabilizing step sizes
US7826516B2 (en) 2005-11-15 2010-11-02 Rambus Inc. Iterative interference canceller for wireless multiple-access systems with multiple receive antennas
US7706428B2 (en) * 2005-04-21 2010-04-27 Telefonaktiebolaget L M Ericsson (Publ) Low complexity inter-carrier interference cancellation
US7668269B2 (en) * 2005-05-09 2010-02-23 Ati Technologies, Inc. Systems, methods, and apparatus for phase noise mitigation
WO2006134527A1 (en) 2005-06-16 2006-12-21 Koninklijke Philips Electronics N.V. Ofdm receiver with csi based llr metrics
JP2009503944A (en) * 2005-07-19 2009-01-29 メディアフィー・コーポレーション Symbol synchronization for OFDM
US20070030914A1 (en) * 2005-08-02 2007-02-08 Samsung Electronics Co., Ltd. Method and system for channel estimation and interference cancellation in an orthogonal frequency division multiple access network
US7702048B2 (en) * 2005-11-15 2010-04-20 Tensorcomm, Incorporated Iterative interference cancellation using mixed feedback weights and stabilizing step sizes
EP1940062B1 (en) * 2005-10-21 2016-09-07 Panasonic Intellectual Property Management Co., Ltd. Inter-carrier interference removal device and reception device using the same
US7623602B2 (en) * 2005-11-15 2009-11-24 Tensorcomm, Inc. Iterative interference canceller for wireless multiple-access systems employing closed loop transmit diversity
US20070110135A1 (en) * 2005-11-15 2007-05-17 Tommy Guess Iterative interference cancellation for MIMO-OFDM receivers
SG141259A1 (en) * 2006-09-12 2008-04-28 Oki Techno Ct Singapore Pte Apparatus and method for receiving digital video signals
EP1903813B1 (en) * 2006-09-19 2016-06-22 Alcatel Lucent Method, server and base station for synchronization of multicast and broadcast frame portions in wimax systems
US7830994B2 (en) * 2006-10-18 2010-11-09 Analog Devices, Inc. Channel estimation system and method
US7844018B2 (en) * 2007-01-02 2010-11-30 Qualcomm Incorporated Methods and apparatuses for reducing inter-carrier interference in an OFDM system
US7995688B2 (en) * 2007-03-08 2011-08-09 Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of Industry, Through The Communications Research Centre Canada Channel estimation and ICI cancellation for OFDM
JP2008306318A (en) * 2007-06-05 2008-12-18 Toshiba Corp Wireless receiving apparatus, wireless receiving apparatus control method, wireless receiving apparatus control program, and semiconductor integrated circuit
CN101350800B (en) * 2007-07-20 2011-06-15 富士通株式会社 Apparatus and method for processing interference between carriers as well as receiver using the same
JP5314002B2 (en) * 2008-02-27 2013-10-16 パナソニック株式会社 Receiving device, integrated circuit, and receiving method
WO2010015101A1 (en) * 2008-08-04 2010-02-11 Nxp B. V. A radio channel model for ici cancellation in multi-carrier systems
US9020050B2 (en) * 2008-10-15 2015-04-28 Stmicroelectronics, Inc. Accounting for inter-carrier interference in determining a response of an OFDM communication channel
US8718208B2 (en) * 2008-10-15 2014-05-06 Stmicroelectronics, Inc. Recovery of data from a multi carrier signal
US9130788B2 (en) 2008-10-15 2015-09-08 Stmicroelectronics, Inc. Determining a response of a rapidly varying OFDM communication channel using an observation scalar
US9148311B2 (en) 2008-10-15 2015-09-29 Stmicroelectronics, Inc. Determining responses of rapidly varying MIMO-OFDM communication channels using observation scalars
US9240908B2 (en) 2008-10-15 2016-01-19 Stmicroelectronics, Inc. Pilot pattern for observation scalar MIMO-OFDM
US9137054B2 (en) 2008-10-15 2015-09-15 Stmicroelectronics, Inc. Pilot pattern for MIMO OFDM
US9596106B2 (en) 2008-10-15 2017-03-14 Stmicroelectronics, Inc. Pilot pattern for observation-scalar MIMO-OFDM
EP2387840B1 (en) 2009-01-16 2013-06-05 Abilis Systems Sarl Interpolated channel estimation for mobile ofdm systems
US8761274B2 (en) * 2009-02-04 2014-06-24 Acorn Technologies, Inc. Least squares channel identification for OFDM systems
US20100272169A1 (en) * 2009-04-24 2010-10-28 Vodafone Holding Gmbh Compensating carrier frequency offsets in ofdm systems
EP2244432A1 (en) * 2009-04-24 2010-10-27 Vodafone Holding GmbH Compensating carrier frequency offsets in OFDM systems
CN102118241A (en) * 2009-12-30 2011-07-06 凌阳科技股份有限公司 Sample phase selection system based on channel capacities
US8385387B2 (en) * 2010-05-20 2013-02-26 Harris Corporation Time dependent equalization of frequency domain spread orthogonal frequency division multiplexing using decision feedback equalization
TWI426733B (en) * 2010-11-15 2014-02-11 Univ Nat Chiao Tung A system and method for processing a frequency-division multiplexing signal
CN102143098B (en) * 2010-12-03 2014-03-05 无锡物联网产业研究院 Channel estimation method and channel estimation device in orthogonal frequency division multiplexing system
US9401826B2 (en) * 2012-02-17 2016-07-26 Sony Corporation Signal processing unit employing a blind channel estimation algorithm and method of operating a receiver apparatus
WO2014023355A1 (en) * 2012-08-09 2014-02-13 Telefonaktiebolaget L M Ericsson (Publ) A method and a node for detecting phase noise in mimo communication systems
US9794008B2 (en) * 2015-12-04 2017-10-17 Montage Technology (Shanghai) Co., Ltd. Noise power estimator, receiver and method for noise power estimation
CN108442969B (en) * 2018-02-28 2019-07-09 中国矿业大学 A joint robot and rescue method for underground rescue based on wireless CSI

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0833484A1 (en) * 1996-09-30 1998-04-01 THOMSON multimedia Device and method for vector equalization of an OFDM signal
WO2001063870A1 (en) * 2000-02-22 2001-08-30 Koninklijke Philips Electronics N.V. Multicarrier receiver with channel estimator

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5802117A (en) * 1996-02-08 1998-09-01 Philips Electronics North America Corporation Method and apparatus for joint frequency offset and timing estimation of a multicarrier modulation system
SE517930C2 (en) * 1997-01-31 2002-08-06 Ericsson Telefon Ab L M Method and device for initial synchronization in a communication system
SG77607A1 (en) * 1997-08-26 2001-01-16 Univ Singapore A multi-user code division multiple access receiver
JP3319422B2 (en) * 1998-05-08 2002-09-03 日本電気株式会社 Multi-carrier transmission system and multi-carrier transmission method
US6456654B1 (en) * 1998-12-22 2002-09-24 Nortel Networks Limited Frame alignment and time domain equalization for communications systems using multicarrier modulation
US6526103B1 (en) * 1998-12-23 2003-02-25 Nortel Networks Limited Multi-stage receiver
US6765969B1 (en) * 1999-09-01 2004-07-20 Motorola, Inc. Method and device for multi-user channel estimation
CN1221083C (en) * 1999-10-19 2005-09-28 美商内数位科技公司 CDMA signal multi-user detection receiver
US6654408B1 (en) * 2000-10-27 2003-11-25 Wisconsin Alumni Research Foundation Method and system for multi-carrier multiple access reception in the presence of imperfections

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0833484A1 (en) * 1996-09-30 1998-04-01 THOMSON multimedia Device and method for vector equalization of an OFDM signal
WO2001063870A1 (en) * 2000-02-22 2001-08-30 Koninklijke Philips Electronics N.V. Multicarrier receiver with channel estimator

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
KOPPELAAR A G C: "MATRIX EQUALIZATION FOR OFDM SYSTEMS", SYMPOSIUM ON INFORMATION THEORY IN THE BENELUX, 17 May 1993 (1993-05-17), pages 236 - 243, XP000199843 *
LINNARTZ J-P M G ET AL: "DOPPLER-RESISTENT OFDM RECEIVERS FOR MOBILE MULTIMEDIA COMMUNICATIONS", PROCEEDINGS OF THE INTERNATIONAL SYMPOSIUM OF MOBILE MULTIMEDIA SYSTEMS AND APPLICATIONS, 9 November 2000 (2000-11-09) - 10 November 2000 (2000-11-10), DELFT, NL, pages 87 - 92, XP001014332 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7428279B2 (en) 2003-03-03 2008-09-23 Interdigital Technology Corporation Reduced complexity sliding window based equalizer
US7609794B2 (en) 2003-03-03 2009-10-27 Interdigital Technology Corporation Reduced complexity sliding window based equalizer

Also Published As

Publication number Publication date
EP1364507A2 (en) 2003-11-26
CN1224228C (en) 2005-10-19
US7054354B2 (en) 2006-05-30
WO2002067527A2 (en) 2002-08-29
CN1462531A (en) 2003-12-17
JP2004519900A (en) 2004-07-02
US20020146063A1 (en) 2002-10-10

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