KR100474765B1 - 적응등화기의고속블라인드등화방법 - Google Patents

적응등화기의고속블라인드등화방법 Download PDF

Info

Publication number
KR100474765B1
KR100474765B1 KR1019950032017A KR19950032017A KR100474765B1 KR 100474765 B1 KR100474765 B1 KR 100474765B1 KR 1019950032017 A KR1019950032017 A KR 1019950032017A KR 19950032017 A KR19950032017 A KR 19950032017A KR 100474765 B1 KR100474765 B1 KR 100474765B1
Authority
KR
South Korea
Prior art keywords
coefficients
adaptive equalizer
taps
subset
blind equalization
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 - Fee Related
Application number
KR1019950032017A
Other languages
English (en)
Korean (ko)
Other versions
KR960013027A (ko
Inventor
바베쉬발칸드라바트
아돌프사우자
Original Assignee
톰슨 콘슈머 일렉트로닉스, 인코포레이티드
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 톰슨 콘슈머 일렉트로닉스, 인코포레이티드 filed Critical 톰슨 콘슈머 일렉트로닉스, 인코포레이티드
Publication of KR960013027A publication Critical patent/KR960013027A/ko
Application granted granted Critical
Publication of KR100474765B1 publication Critical patent/KR100474765B1/ko
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/21—Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
    • H04N5/211—Ghost signal cancellation
    • 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
    • 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
    • H04L2025/03535—Variable structures
    • H04L2025/03547—Switching between time domain structures
    • H04L2025/03566—Switching between time domain structures between different tapped delay line structures
    • H04L2025/03585—Modifying the length
    • 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
    • H04L2025/03726—Switching between algorithms
    • H04L2025/03732—Switching between algorithms according to the convergence state

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Picture Signal Circuits (AREA)
KR1019950032017A 1994-09-29 1995-09-27 적응등화기의고속블라인드등화방법 Expired - Fee Related KR100474765B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/315,050 1994-09-29
US08/315,050 US5517213A (en) 1994-09-29 1994-09-29 Process for fast blind equalization of an adaptive equalizer

Publications (2)

Publication Number Publication Date
KR960013027A KR960013027A (ko) 1996-04-20
KR100474765B1 true KR100474765B1 (ko) 2005-08-01

Family

ID=23222662

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950032017A Expired - Fee Related KR100474765B1 (ko) 1994-09-29 1995-09-27 적응등화기의고속블라인드등화방법

Country Status (11)

Country Link
US (1) US5517213A (https=)
EP (1) EP0705009B1 (https=)
JP (2) JPH08125585A (https=)
KR (1) KR100474765B1 (https=)
CN (1) CN1112030C (https=)
DE (1) DE69529256T2 (https=)
MX (1) MX9504159A (https=)
MY (1) MY112483A (https=)
SG (1) SG42775A1 (https=)
TR (1) TR199501191A2 (https=)
TW (1) TW318296B (https=)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5793807A (en) * 1996-05-07 1998-08-11 Lucent Technologies Inc. Multimodulus blind eqalization using piecewise linear contours
US5712873A (en) * 1996-06-04 1998-01-27 Thomson Consumer Electronics, Inc. Multi-mode equalizer in a digital video signal processing system
US6005640A (en) * 1996-09-27 1999-12-21 Sarnoff Corporation Multiple modulation format television signal receiver system
US6421393B1 (en) 1997-10-16 2002-07-16 Clearcube Technology, Inc. Technique to transfer multiple data streams over a wire or wireless medium
US6016374A (en) * 1997-11-04 2000-01-18 Lucent Technologies Inc. Optical fiber communications system with adaptive data equalizer
US6178201B1 (en) * 1998-03-11 2001-01-23 Agilent Technologies Inc. Controlling an adaptive equalizer in a demodulator
US6546047B1 (en) * 1998-10-08 2003-04-08 Altima Communications, Inc. Methods and circuits for optimal equalization
US6418164B1 (en) * 1999-01-14 2002-07-09 Nxtwave Communications, Inc. Adaptive equalizer with enhanced error quantization
US6389064B1 (en) * 1999-03-08 2002-05-14 International Business Machines Corporation Modems, methods, and computer program products for identifying a signaling alphabet in variance with an ideal alphabet due to digital impairments
US6487243B1 (en) 1999-03-08 2002-11-26 International Business Machines Corporation Modems, methods, and computer program products for recovering from errors in a tone reversal sequence between two modems
US6381267B1 (en) 1999-03-08 2002-04-30 International Business Machines Corporation Modems, methods, and computer program products for falling back to a lower data rate protocol upon detecting abnormal line conditions during startup
US6553518B1 (en) 1999-03-08 2003-04-22 International Business Machines Corporation Severe error detectors, methods and computer program products that use constellation specific error event thresholds to detect severe error events during demodulation of a signal comprising symbols from a plurality of symbol constellations
US7003030B2 (en) 1999-03-08 2006-02-21 Lenovo (Singapore) Pte. Ltd. Receivers, methods, and computer program products for an analog modem that receives data signals from a digital modem
US6661837B1 (en) 1999-03-08 2003-12-09 International Business Machines Corporation Modems, methods, and computer program products for selecting an optimum data rate using error signals representing the difference between the output of an equalizer and the output of a slicer or detector
US6341360B1 (en) * 1999-03-08 2002-01-22 International Business Machines Corporation Decision feedback equalizers, methods, and computer program products for detecting severe error events and preserving equalizer filter characteristics in response thereto
US6661847B1 (en) 1999-05-20 2003-12-09 International Business Machines Corporation Systems methods and computer program products for generating and optimizing signal constellations
JP3560138B2 (ja) * 1999-12-06 2004-09-02 松下電器産業株式会社 波形等化器とこれを用いた移動局無線装置、基地局無線装置及び移動通信システム
US7068736B2 (en) * 2001-07-11 2006-06-27 Agere Systems Inc. Methods and devices for shortening the convergence time of blind, adaptive equalizers
US7391834B2 (en) * 2002-10-01 2008-06-24 Intel Corporation Pulse amplitude modulated system with reduced intersymbol interference
US7293055B2 (en) * 2003-04-07 2007-11-06 Pmc-Sierra, Inc. Flexible adaptation engine for adaptive transversal filters
US20050047779A1 (en) * 2003-09-02 2005-03-03 Harris Corporation Post-detection, fiber optic dispersion compensation using adjustable inverse distortion operator employing trained or decision-based parameter adaptation (estimation)
US20050047802A1 (en) * 2003-09-02 2005-03-03 Harris Corporation Post-detection, fiber optic dispersion compensation using adjustable infinite impulse response filter employing trained or decision-directed adaptation
JP4331641B2 (ja) * 2004-04-09 2009-09-16 富士通株式会社 等化回路を有する受信回路
US7852912B2 (en) * 2005-03-25 2010-12-14 Agilent Technologies, Inc. Direct determination equalizer system
WO2013051244A1 (ja) 2011-10-05 2013-04-11 日本電気株式会社 信号処理装置及び信号処理方法
US9049069B2 (en) * 2013-03-21 2015-06-02 Broadcom Corporation Sparse equalizer system
US10069653B1 (en) * 2017-05-12 2018-09-04 Seagate Technology Llc Blind partial response equalization

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0524559A2 (en) * 1991-07-26 1993-01-27 General Instrument Corporation Of Delaware Carrier phase recovery for an adaptive equalizer

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2354003A1 (fr) * 1976-06-04 1977-12-30 Anvar Perfectionnements aux systemes de transmission de donnees
JPS58161415A (ja) * 1982-03-18 1983-09-26 Ricoh Co Ltd 自動等化器
JPS60206232A (ja) * 1984-03-30 1985-10-17 Hitachi Denshi Ltd 自動等化方式
US5134464A (en) * 1990-11-16 1992-07-28 North American Philips Corporation Method and apparatus for the transmission and reception of a multicarrier digital television signal
US5263033A (en) * 1990-06-22 1993-11-16 At&T Bell Laboratories Joint data and channel estimation using fast blind trellis search
US5157690A (en) * 1990-10-30 1992-10-20 Level One Communications, Inc. Adaptive convergent decision feedback equalizer
US5282225A (en) * 1992-02-04 1994-01-25 Northeastern University Adaptive blind channel equalizer system
US5267266A (en) * 1992-05-11 1993-11-30 Bell Communications Research, Inc. Fast converging adaptive equalizer using pilot adaptive filters
US5297166A (en) * 1992-07-02 1994-03-22 National Semiconductor Corporation Method and apparatus for decision feedback equalization with reduced convergence time

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0524559A2 (en) * 1991-07-26 1993-01-27 General Instrument Corporation Of Delaware Carrier phase recovery for an adaptive equalizer

Also Published As

Publication number Publication date
DE69529256D1 (de) 2003-02-06
JP2007318800A (ja) 2007-12-06
SG42775A1 (en) 1997-10-17
JP4540692B2 (ja) 2010-09-08
TW318296B (https=) 1997-10-21
EP0705009A1 (en) 1996-04-03
US5517213A (en) 1996-05-14
DE69529256T2 (de) 2003-08-28
TR199501191A2 (tr) 1996-06-21
KR960013027A (ko) 1996-04-20
MY112483A (en) 2001-06-30
JPH08125585A (ja) 1996-05-17
EP0705009B1 (en) 2003-01-02
MX9504159A (es) 1997-02-28
CN1112030C (zh) 2003-06-18
CN1129880A (zh) 1996-08-28

Similar Documents

Publication Publication Date Title
KR100474765B1 (ko) 적응등화기의고속블라인드등화방법
US5452015A (en) Method and apparatus for combating co-channel NTSC interference for digital TV transmission
AU646618B2 (en) Method and apparatus for updating coefficients in a complex adaptive equalizer
JP4845246B2 (ja) トレーニングモードを有する適応チャネル等化器
KR100270893B1 (ko) 디지털 텔레비전 신호에서의 동일채널 혼신의 검출
KR100985486B1 (ko) 결정 피드백 등화기에서 표준 자동 스위칭 모드와 소프트 자동 스위칭 모드 중 하나를 자동으로 선택하기 위한 모드 선택기 장치 및 방법
US5602583A (en) NTSC rejection filter with switched tomlinson precoder for reducing NTSC co-channel interference in ATV receivers
US5661528A (en) Apparatus and method for controlling operation of a high defination television adaptive equalizer
JP2000507067A (ja) ディジタル受信機
US6907065B2 (en) Real/complex dual combination channel equalizer
US6573948B1 (en) Equalizing intermediate-frequency signals before demodulating them in a digital television receiver
JP2000500958A (ja) Ｉｉｒフィルタから確定的シーケンスを発生する方法及び装置
US6388701B1 (en) Device and method for removing co-channel interference signal in modulation/demodulation receiver having reference signal
KR20020081075A (ko) 채널간 간섭이 존재하는 경우에 ｖｓｂ 고선명 텔레비전신호를 등화시키기 위한 방법
US20040091070A1 (en) Equalizer for a single-carrier receiver and equalization method therefor
JP2004112792A (ja) 単一搬送波受信機のチャンネル等化器及びその等化方法
JP4425520B2 (ja) 高精細度テレビジョン信号用のブラインド等化装置
US6163572A (en) Method of reducing coefficient leakage noise introduced to an equalizer during steady state operation
US20040042546A1 (en) Single carrier receiver with an equalizer for improving equalization quality and equalization method thereof
KR100281390B1 (ko) ８-vsb 적응 채널등화기 및 계수 갱신방법
US20090262795A1 (en) Adaptive equalizer tap stepsize
MXPA99003975A (en) Device and method for eliminating channel interference signs from contiguo in modulation / demodulation receivers having a reference sign
EP1397894A1 (en) Pre-equalizer correcting the magnitude of a received signal without regard to phase distortions
HK1114722A (en) Adaptive equalizer tap stepsize

Legal Events

Date Code Title Description
PA0109 Patent application

St.27 status event code: A-0-1-A10-A12-nap-PA0109

R17-X000 Change to representative recorded

St.27 status event code: A-3-3-R10-R17-oth-X000

PG1501 Laying open of application

St.27 status event code: A-1-1-Q10-Q12-nap-PG1501

PN2301 Change of applicant

St.27 status event code: A-3-3-R10-R13-asn-PN2301

St.27 status event code: A-3-3-R10-R11-asn-PN2301

A201 Request for examination
P11-X000 Amendment of application requested

St.27 status event code: A-2-2-P10-P11-nap-X000

P13-X000 Application amended

St.27 status event code: A-2-2-P10-P13-nap-X000

PA0201 Request for examination

St.27 status event code: A-1-2-D10-D11-exm-PA0201

E902 Notification of reason for refusal
PE0902 Notice of grounds for rejection

St.27 status event code: A-1-2-D10-D21-exm-PE0902

T11-X000 Administrative time limit extension requested

St.27 status event code: U-3-3-T10-T11-oth-X000

T11-X000 Administrative time limit extension requested

St.27 status event code: U-3-3-T10-T11-oth-X000

P11-X000 Amendment of application requested

St.27 status event code: A-2-2-P10-P11-nap-X000

P13-X000 Application amended

St.27 status event code: A-2-2-P10-P13-nap-X000

E601 Decision to refuse application
PE0601 Decision on rejection of patent

St.27 status event code: N-2-6-B10-B15-exm-PE0601

J201 Request for trial against refusal decision
PJ0201 Trial against decision of rejection

St.27 status event code: A-3-3-V10-V11-apl-PJ0201

J301 Trial decision

Free format text: TRIAL DECISION FOR APPEAL AGAINST DECISION TO DECLINE REFUSAL REQUESTED 20030224

Effective date: 20041231

PJ1301 Trial decision

St.27 status event code: A-3-3-V10-V15-crt-PJ1301

Decision date: 20041231

Appeal event data comment text: Appeal Kind Category : Appeal against decision to decline refusal, Appeal Ground Text : 1995 32017

Appeal request date: 20030224

Appellate body name: Patent Examination Board

Decision authority category: Office appeal board

Decision identifier: 2003101000636

PS0901 Examination by remand of revocation

St.27 status event code: A-6-3-E10-E12-rex-PS0901

S901 Examination by remand of revocation
GRNO Decision to grant (after opposition)
PS0701 Decision of registration after remand of revocation

St.27 status event code: A-3-4-F10-F13-rex-PS0701

GRNT Written decision to grant
PR0701 Registration of establishment

St.27 status event code: A-2-4-F10-F11-exm-PR0701

PR1002 Payment of registration fee

St.27 status event code: A-2-2-U10-U11-oth-PR1002

Fee payment year number: 1

PG1601 Publication of registration

St.27 status event code: A-4-4-Q10-Q13-nap-PG1601

PR1001 Payment of annual fee

St.27 status event code: A-4-4-U10-U11-oth-PR1001

Fee payment year number: 4

PR1001 Payment of annual fee

St.27 status event code: A-4-4-U10-U11-oth-PR1001

Fee payment year number: 5

PR1001 Payment of annual fee

St.27 status event code: A-4-4-U10-U11-oth-PR1001

Fee payment year number: 6

PR1001 Payment of annual fee

St.27 status event code: A-4-4-U10-U11-oth-PR1001

Fee payment year number: 7

FPAY Annual fee payment

Payment date: 20120207

Year of fee payment: 8

PR1001 Payment of annual fee

St.27 status event code: A-4-4-U10-U11-oth-PR1001

Fee payment year number: 8

LAPS Lapse due to unpaid annual fee
PC1903 Unpaid annual fee

St.27 status event code: A-4-4-U10-U13-oth-PC1903

Not in force date: 20130225

Payment event data comment text: Termination Category : DEFAULT_OF_REGISTRATION_FEE

PC1903 Unpaid annual fee

St.27 status event code: N-4-6-H10-H13-oth-PC1903

Ip right cessation event data comment text: Termination Category : DEFAULT_OF_REGISTRATION_FEE

Not in force date: 20130225

P22-X000 Classification modified

St.27 status event code: A-4-4-P10-P22-nap-X000