WO2003017607A3 - Iterative calculation of coefficients for a multicarrier equaliser - Google Patents

Iterative calculation of coefficients for a multicarrier equaliser Download PDF

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Publication number
WO2003017607A3
WO2003017607A3 PCT/CA2002/001251 CA0201251W WO03017607A3 WO 2003017607 A3 WO2003017607 A3 WO 2003017607A3 CA 0201251 W CA0201251 W CA 0201251W WO 03017607 A3 WO03017607 A3 WO 03017607A3
Authority
WO
WIPO (PCT)
Prior art keywords
multicarrier
equaliser
coefficients
iterative calculation
current symbol
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/CA2002/001251
Other languages
French (fr)
Other versions
WO2003017607A2 (en
Inventor
Octavian V Sarca
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.)
Redline Communications Inc
Original Assignee
Redline Communications Inc
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 Redline Communications Inc filed Critical Redline Communications Inc
Priority to AU2002322889A priority Critical patent/AU2002322889A1/en
Priority to EP02754028A priority patent/EP1419628A2/en
Publication of WO2003017607A2 publication Critical patent/WO2003017607A2/en
Publication of WO2003017607A3 publication Critical patent/WO2003017607A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • H04L2025/03592—Adaptation methods
    • H04L2025/03598—Algorithms
    • H04L2025/03611—Iterative algorithms
    • H04L2025/03617—Time recursive algorithms

Landscapes

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

Abstract

An multicarrier adaptive channel equalizer is provided, which has a coefficient adaptation branch that updates the filter coefficients based upon a weighted average of previous coefficient values and decisions for the current symbol. An override or nulling of the weighting factor is provided to mitigate the effects of noise on the current symbol. An embodiment of the OFDM adaptive channel equalizer requires only one coefficient memory port, and only two multipliers as in a non-adaptive equalizer thereby allowing a cost effective hardware implementation.
PCT/CA2002/001251 2001-08-14 2002-08-13 Iterative calculation of coefficients for a multicarrier equaliser Ceased WO2003017607A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2002322889A AU2002322889A1 (en) 2001-08-14 2002-08-13 Iterative calculation of coefficients for a multicarrier equaliser
EP02754028A EP1419628A2 (en) 2001-08-14 2002-08-13 Iterative calculation of coefficients for a multicarrier equaliser

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US31183301P 2001-08-14 2001-08-14
US60/311,833 2001-08-14

Publications (2)

Publication Number Publication Date
WO2003017607A2 WO2003017607A2 (en) 2003-02-27
WO2003017607A3 true WO2003017607A3 (en) 2003-05-30

Family

ID=23208696

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2002/001251 Ceased WO2003017607A2 (en) 2001-08-14 2002-08-13 Iterative calculation of coefficients for a multicarrier equaliser

Country Status (3)

Country Link
EP (1) EP1419628A2 (en)
AU (1) AU2002322889A1 (en)
WO (1) WO2003017607A2 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0653858A2 (en) * 1993-11-16 1995-05-17 Kabushiki Kaisha Toshiba OFDM Synchronization demodulation circuit
EP0898381A2 (en) * 1997-08-20 1999-02-24 Samsung Electronics Co., Ltd. Equalizing method and equalizer for ofdm receiver
EP0924905A2 (en) * 1997-12-19 1999-06-23 Nec Corporation Equaliser training for multicarrier transmission
EP0959596A1 (en) * 1998-05-15 1999-11-24 Nec Corporation Method and circuit for training an adaptive equalizer
EP1054538A2 (en) * 1999-05-19 2000-11-22 Motorola, Inc. Fast training of equalizers in discrete multi-tone (DMT) systems

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0653858A2 (en) * 1993-11-16 1995-05-17 Kabushiki Kaisha Toshiba OFDM Synchronization demodulation circuit
EP0898381A2 (en) * 1997-08-20 1999-02-24 Samsung Electronics Co., Ltd. Equalizing method and equalizer for ofdm receiver
EP0924905A2 (en) * 1997-12-19 1999-06-23 Nec Corporation Equaliser training for multicarrier transmission
EP0959596A1 (en) * 1998-05-15 1999-11-24 Nec Corporation Method and circuit for training an adaptive equalizer
EP1054538A2 (en) * 1999-05-19 2000-11-22 Motorola, Inc. Fast training of equalizers in discrete multi-tone (DMT) systems

Also Published As

Publication number Publication date
WO2003017607A2 (en) 2003-02-27
AU2002322889A1 (en) 2003-03-03
EP1419628A2 (en) 2004-05-19

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