DE2967301D1 - Method and arrangement for initiating an adaptive equalizer starting from an unknown data signal in a transmission system utilizing quadrature amplitude modulation - Google Patents

Method and arrangement for initiating an adaptive equalizer starting from an unknown data signal in a transmission system utilizing quadrature amplitude modulation

Info

Publication number
DE2967301D1
DE2967301D1 DE7979101385T DE2967301T DE2967301D1 DE 2967301 D1 DE2967301 D1 DE 2967301D1 DE 7979101385 T DE7979101385 T DE 7979101385T DE 2967301 T DE2967301 T DE 2967301T DE 2967301 D1 DE2967301 D1 DE 2967301D1
Authority
DE
Germany
Prior art keywords
initiating
starting
arrangement
data signal
transmission system
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.)
Expired
Application number
DE7979101385T
Other languages
English (en)
Inventor
Dominique Godard
Philippe Thirion
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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 International Business Machines Corp filed Critical International Business Machines Corp
Application granted granted Critical
Publication of DE2967301D1 publication Critical patent/DE2967301D1/de
Expired 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
    • H04L25/03038—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception with a non-recursive structure
    • H04L25/0305—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception with a non-recursive structure using blind adaptation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/38—Demodulator circuits; Receiver circuits
DE7979101385T 1978-06-13 1979-05-07 Method and arrangement for initiating an adaptive equalizer starting from an unknown data signal in a transmission system utilizing quadrature amplitude modulation Expired DE2967301D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7818478A FR2428946A1 (fr) 1978-06-13 1978-06-13 Procede et dispositif pour initialiser un egaliseur adaptatif a partir d'un signal de donnees inconnu dans un systeme de transmission utilisant la modulation d'amplitude en quadrature

Publications (1)

Publication Number Publication Date
DE2967301D1 true DE2967301D1 (en) 1985-01-03

Family

ID=9209763

Family Applications (1)

Application Number Title Priority Date Filing Date
DE7979101385T Expired DE2967301D1 (en) 1978-06-13 1979-05-07 Method and arrangement for initiating an adaptive equalizer starting from an unknown data signal in a transmission system utilizing quadrature amplitude modulation

Country Status (5)

Country Link
US (1) US4227152A (de)
EP (1) EP0006121B1 (de)
JP (1) JPS5924568B2 (de)
DE (1) DE2967301D1 (de)
FR (1) FR2428946A1 (de)

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JPH061908B2 (ja) * 1988-02-02 1994-01-05 郵政省通信総合研究所長 伝送路歪補償方式
SE462942B (sv) * 1989-01-26 1990-09-17 Ericsson Telefon Ab L M Saett och anordning foer snabb frekvensstyrning av en koherent radiomottagare
SE462943B (sv) * 1989-01-26 1990-09-17 Ericsson Telefon Ab L M Saett och anordning foer frekvensstyrning av en koherent radiomottagare
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JP2586169B2 (ja) * 1990-03-06 1997-02-26 日本電気株式会社 復調システム
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EP0577901B1 (de) * 1992-07-10 2000-04-26 International Business Machines Corporation Verfahren und Einrichtung zur adaptiven Entzerrung
US5432818A (en) * 1993-02-16 1995-07-11 Lou; Yuang Method and apparatus of joint adaptive channel encoding, adaptive system filtering, and maximum likelihood sequence estimation process by means of an unknown data training
US5471508A (en) * 1993-08-20 1995-11-28 Hitachi America, Ltd. Carrier recovery system using acquisition and tracking modes and automatic carrier-to-noise estimation
US5835532A (en) * 1994-03-21 1998-11-10 Rca Thomson Licensing Corporation Blind equalizer for a vestigial sideband signal
US5754591A (en) * 1994-08-03 1998-05-19 Broadcom Corporation System for, and method of, processing quadrature amplitude modulated signals
EP0737394A1 (de) * 1994-10-21 1996-10-16 Koninklijke Philips Electronics N.V. Bei phasenrauschen robuste qam-konstellation sowie kodierer und dekodierer dafür
US5970093A (en) * 1996-01-23 1999-10-19 Tiernan Communications, Inc. Fractionally-spaced adaptively-equalized self-recovering digital receiver for amplitude-Phase modulated signals
US5793807A (en) * 1996-05-07 1998-08-11 Lucent Technologies Inc. Multimodulus blind eqalization using piecewise linear contours
US5940440A (en) * 1996-05-07 1999-08-17 Lucent Technologies Inc. Generalized multimodulus technique for blind equalization
US5712873A (en) * 1996-06-04 1998-01-27 Thomson Consumer Electronics, Inc. Multi-mode equalizer in a digital video signal processing system
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US6704317B1 (en) 1998-05-27 2004-03-09 3Com Corporation Multi-carrier LAN modem server
US6891887B1 (en) 1998-05-27 2005-05-10 3Com Corporation Multi-carrier LAN adapter device using interpolative equalizer
US6603811B1 (en) 1998-05-29 2003-08-05 3Com Corporation Low complexity frequency domain equalizer having fast re-lock
US6377683B1 (en) 1998-05-29 2002-04-23 3Com Corporation Low complexity frequency domain echo canceller for DMT transceivers
US6259743B1 (en) * 1998-07-02 2001-07-10 Lucent Technologies Inc. Automatic constellation phase recovery in blind start-up of a dual mode CAP-QAM receiver
US6493381B1 (en) * 1999-06-24 2002-12-10 Agere Systems Inc. Blind equalization algorithm with the joint use of the constant R and the sliced symbols
US6490318B1 (en) * 1999-06-24 2002-12-03 Agere Systems Inc. Phase-compensating constant modulus algorithm
US7110923B2 (en) * 1999-11-04 2006-09-19 Verticalband, Limited Fast, blind equalization techniques using reliable symbols
US7143013B2 (en) * 1999-11-04 2006-11-28 Verticalband, Limited Reliable symbols as a means of improving the performance of information transmission systems
US7085691B2 (en) * 1999-11-04 2006-08-01 Verticalband, Limited Reliable symbols as a means of improving the performance of information transmission systems
FI108265B (fi) * 2000-02-21 2001-12-14 Tellabs Oy Menetelmä ja laitteisto adaptiivisen kanavakorjauksen opetusvaiheen toteuttamiseksi digitaalisella tietoliikenneyhteydellä
CA2557425C (en) * 2004-03-31 2014-09-16 British Telecommunications Public Limited Company Apparatus and method for compensating for data degardation
EP1592191B1 (de) * 2004-04-30 2007-06-06 Sony Deutschland GmbH Entzerrerschaltung und Verfahren mit Maximalwahrscheinlichkeitsdetektion
US20060251181A1 (en) * 2005-03-22 2006-11-09 Beceem Communications, Inc. Method and system for signal detection using a reduced transmitter constellation
WO2017019002A1 (en) * 2015-07-24 2017-02-02 Halliburton Energy Services, Inc. Channel estimation in mud pulse telemetry
US10790929B2 (en) * 2018-10-12 2020-09-29 Samsung Electronics Co., Ltd. Nested lookup table for symbol detection with initial candidate reduction
JP2020191578A (ja) * 2019-05-23 2020-11-26 日本電気株式会社 受信機、受信方法、及び、受信プログラム

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US3978407A (en) * 1975-07-23 1976-08-31 Codex Corporation Fast start-up adaptive equalizer communication system using two data transmission rates
FR2335109A1 (fr) * 1975-12-09 1977-07-08 Ibm France Procede et dispositif de detection statistique de donnees
FR2358061A1 (fr) * 1976-07-08 1978-02-03 Ibm France Procede et dispositif d'egalisation utilisant la transformee de fourier

Also Published As

Publication number Publication date
EP0006121A1 (de) 1980-01-09
JPS55700A (en) 1980-01-07
FR2428946B1 (de) 1980-10-24
US4227152A (en) 1980-10-07
FR2428946A1 (fr) 1980-01-11
JPS5924568B2 (ja) 1984-06-11
EP0006121B1 (de) 1984-11-21

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Legal Events

Date Code Title Description
8339 Ceased/non-payment of the annual fee