WO2006036662A3 - Feed forward equalizer for a communication system - Google Patents

Feed forward equalizer for a communication system Download PDF

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Publication number
WO2006036662A3
WO2006036662A3 PCT/US2005/033656 US2005033656W WO2006036662A3 WO 2006036662 A3 WO2006036662 A3 WO 2006036662A3 US 2005033656 W US2005033656 W US 2005033656W WO 2006036662 A3 WO2006036662 A3 WO 2006036662A3
Authority
WO
WIPO (PCT)
Prior art keywords
filter
feed forward
forward equalizer
multipliers
multiplier
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/US2005/033656
Other languages
French (fr)
Other versions
WO2006036662A2 (en
Inventor
Benny Christensen
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.)
Intel Corp
Original Assignee
Intel Corp
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 Intel Corp filed Critical Intel Corp
Priority to DE602005021233T priority Critical patent/DE602005021233D1/en
Priority to EP05798312A priority patent/EP1794965B1/en
Priority to AT05798312T priority patent/ATE467967T1/en
Publication of WO2006036662A2 publication Critical patent/WO2006036662A2/en
Publication of WO2006036662A3 publication Critical patent/WO2006036662A3/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
    • H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
    • H04L25/03019—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception
    • H04L25/03057—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception with a recursive structure
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H21/00—Adaptive networks
    • H03H21/0001—Analogue adaptive filters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H21/00—Adaptive networks
    • H03H21/0001—Analogue adaptive filters
    • H03H2021/0009—Details
    • H03H2021/001—Analog multipliers
    • 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
    • H04L2025/03356—Baseband transmission
    • 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
    • H04L2025/03445—Time domain
    • H04L2025/03471—Tapped delay lines
    • H04L2025/03484—Tapped delay lines time-recursive
    • H04L2025/0349—Tapped delay lines time-recursive as a feedback filter
    • 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
    • H04L2025/03445—Time domain
    • H04L2025/03471—Tapped delay lines
    • H04L2025/03509—Tapped delay lines fractionally spaced
    • 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
    • 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

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)
  • Amplifiers (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Dc Digital Transmission (AREA)

Abstract

Analogue feed forward equalizer using same delay elements for filter adaptive weight control circuit. Three embodiments.1: locking up due to all coefficients being zero during initialisation avoided by centre spike initialisation method. Current source offsets gain range of centre tap filter multiplier thus forcing output of the filter multiplier to be always non-zero. 2: dc bypass circuit used in filter multipliers thus avoiding reduction in voltage swing in summer of filter due to dc offsets in filter multipliers. 3: First delay stage in each delay element receives input data.
PCT/US2005/033656 2004-09-27 2005-09-16 Feed forward equalizer for a communication system Ceased WO2006036662A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE602005021233T DE602005021233D1 (en) 2004-09-27 2005-09-16 Feedforward equalizer for a communication system
EP05798312A EP1794965B1 (en) 2004-09-27 2005-09-16 Feed forward equalizer for a communication system
AT05798312T ATE467967T1 (en) 2004-09-27 2005-09-16 FORWARD COUPLING EQUALIZER FOR A COMMUNICATIONS SYSTEM

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/952,192 2004-09-27
US10/952,192 US7738546B2 (en) 2004-09-27 2004-09-27 Feed forward equalizer for a communication system

Publications (2)

Publication Number Publication Date
WO2006036662A2 WO2006036662A2 (en) 2006-04-06
WO2006036662A3 true WO2006036662A3 (en) 2006-07-13

Family

ID=35539522

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2005/033656 Ceased WO2006036662A2 (en) 2004-09-27 2005-09-16 Feed forward equalizer for a communication system

Country Status (6)

Country Link
US (1) US7738546B2 (en)
EP (1) EP1794965B1 (en)
AT (1) ATE467967T1 (en)
DE (1) DE602005021233D1 (en)
TW (1) TWI312251B (en)
WO (1) WO2006036662A2 (en)

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US7738546B2 (en) 2004-09-27 2010-06-15 Intel Corporation Feed forward equalizer for a communication system
US7551667B2 (en) * 2004-09-27 2009-06-23 Intel Corporation Feed forward equalizer
TWI257222B (en) * 2004-09-30 2006-06-21 Faraday Tech Corp Equalizer for a serial data communication receiver
US7710188B1 (en) 2006-01-13 2010-05-04 Marvell International Ltd. Low-noise, temperature-insensitive, voltage or current input, analog front end architecture
TWI495275B (en) * 2008-01-31 2015-08-01 Realtek Semiconductor Corp Signal processing device utilized in communication system
JP2009257842A (en) * 2008-04-14 2009-11-05 Ttc:Kk Examination method of osteoarthritis and diagnostic kit
US7974336B2 (en) * 2008-04-23 2011-07-05 Mediatek Inc. Equalization system and method thereof
US20100020862A1 (en) * 2008-07-25 2010-01-28 Taiwan Semiconductor Manufacturing Co., Ltd. Input control circuit for the summer of a decision feedback equalizer
US8466712B1 (en) * 2010-01-11 2013-06-18 Marvell Israel (M.I.S.L) Ltd. Direct current (DC) coupling with rail to rail common mode
US8379702B2 (en) * 2010-03-16 2013-02-19 Micrel, Inc. High bandwidth programmable transmission line pre-emphasis method and circuit
US8379701B2 (en) * 2010-03-16 2013-02-19 Micrel, Inc. High bandwidth dual programmable transmission line pre-emphasis method and circuit
US8687770B2 (en) * 2010-04-29 2014-04-01 Ikanos Communications, Inc. Systems and methods for performing line imbalance measurement and mitigation based on a common mode sensor
US8289062B2 (en) 2010-09-16 2012-10-16 Micron Technology, Inc. Analog delay lines and adaptive biasing
US8873612B1 (en) * 2012-06-20 2014-10-28 MagnaCom Ltd. Decision feedback equalizer with multiple cores for highly-spectrally-efficient communications
US8781008B2 (en) 2012-06-20 2014-07-15 MagnaCom Ltd. Highly-spectrally-efficient transmission using orthogonal frequency division multiplexing
US9166834B2 (en) 2012-06-20 2015-10-20 MagnaCom Ltd. Method and system for corrupt symbol handling for providing high reliability sequences
US8737458B2 (en) 2012-06-20 2014-05-27 MagnaCom Ltd. Highly-spectrally-efficient reception using orthogonal frequency division multiplexing
TWI462538B (en) * 2012-06-21 2014-11-21 Hon Hai Prec Ind Co Ltd Equalizer
US8929428B2 (en) * 2012-10-30 2015-01-06 International Business Machines Corporation Feed-forward equalization in a receiver
US9088400B2 (en) 2012-11-14 2015-07-21 MagnaCom Ltd. Hypotheses generation based on multidimensional slicing
US8811548B2 (en) 2012-11-14 2014-08-19 MagnaCom, Ltd. Hypotheses generation based on multidimensional slicing
US9385898B2 (en) * 2013-05-30 2016-07-05 Avago Technologies General Ip (Singapore) Pte. Ltd. Pipelined programmable feed forward equalizer (FFE) for a receiver
US9118519B2 (en) 2013-11-01 2015-08-25 MagnaCom Ltd. Reception of inter-symbol-correlated signals using symbol-by-symbol soft-output demodulator
US8804879B1 (en) 2013-11-13 2014-08-12 MagnaCom Ltd. Hypotheses generation based on multidimensional slicing
US9130637B2 (en) 2014-01-21 2015-09-08 MagnaCom Ltd. Communication methods and systems for nonlinear multi-user environments
US9496900B2 (en) 2014-05-06 2016-11-15 MagnaCom Ltd. Signal acquisition in a multimode environment
US8891701B1 (en) 2014-06-06 2014-11-18 MagnaCom Ltd. Nonlinearity compensation for reception of OFDM signals
US9246523B1 (en) 2014-08-27 2016-01-26 MagnaCom Ltd. Transmitter signal shaping
US9276619B1 (en) 2014-12-08 2016-03-01 MagnaCom Ltd. Dynamic configuration of modulation and demodulation
US9191247B1 (en) 2014-12-09 2015-11-17 MagnaCom Ltd. High-performance sequence estimation system and method of operation

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Also Published As

Publication number Publication date
US20060067396A1 (en) 2006-03-30
TWI312251B (en) 2009-07-11
ATE467967T1 (en) 2010-05-15
US7738546B2 (en) 2010-06-15
DE602005021233D1 (en) 2010-06-24
EP1794965A2 (en) 2007-06-13
WO2006036662A2 (en) 2006-04-06
EP1794965B1 (en) 2010-05-12
TW200627880A (en) 2006-08-01

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