DE3886070T2 - Schaltung zur vollständigen oder teilweisen Annullierung einer Wellenform mit nichtrekursiven und rekursiven Filtern. - Google Patents

Schaltung zur vollständigen oder teilweisen Annullierung einer Wellenform mit nichtrekursiven und rekursiven Filtern.

Info

Publication number
DE3886070T2
DE3886070T2 DE88103169T DE3886070T DE3886070T2 DE 3886070 T2 DE3886070 T2 DE 3886070T2 DE 88103169 T DE88103169 T DE 88103169T DE 3886070 T DE3886070 T DE 3886070T DE 3886070 T2 DE3886070 T2 DE 3886070T2
Authority
DE
Germany
Prior art keywords
recursive
waveform
complete
circuit
partial cancellation
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
DE88103169T
Other languages
English (en)
Other versions
DE3886070D1 (de
Inventor
Shin Ichi Koike
Masaru Yamaguchi
Masanobu Arai
Takenori C O Nec Miyagi Ogata
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.)
NEC Corp
Original Assignee
NEC 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
Priority claimed from JP62046740A external-priority patent/JPH0771029B2/ja
Priority claimed from JP25928287A external-priority patent/JPH0693598B2/ja
Priority claimed from JP62260227A external-priority patent/JPH0748631B2/ja
Application filed by NEC Corp filed Critical NEC Corp
Application granted granted Critical
Publication of DE3886070D1 publication Critical patent/DE3886070D1/de
Publication of DE3886070T2 publication Critical patent/DE3886070T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
    • H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers
    • H04B3/235—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers combined with adaptive equaliser
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • H03H17/0283—Filters characterised by the filter structure
    • H03H17/0286—Combinations of filter structures
    • H03H17/0288—Recursive, non-recursive, ladder, lattice structures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
    • H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers
    • H04B3/238—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers using initial training sequence

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Mathematical Physics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
DE88103169T 1987-03-03 1988-03-02 Schaltung zur vollständigen oder teilweisen Annullierung einer Wellenform mit nichtrekursiven und rekursiven Filtern. Expired - Fee Related DE3886070T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP62046740A JPH0771029B2 (ja) 1987-03-03 1987-03-03 エコ−消去器
JP25928287A JPH0693598B2 (ja) 1987-10-14 1987-10-14 判定帰還等化器
JP62260227A JPH0748631B2 (ja) 1987-10-14 1987-10-14 巡回型フィルタを内蔵した判定帰還等化器

Publications (2)

Publication Number Publication Date
DE3886070D1 DE3886070D1 (de) 1994-01-20
DE3886070T2 true DE3886070T2 (de) 1994-04-14

Family

ID=27292723

Family Applications (1)

Application Number Title Priority Date Filing Date
DE88103169T Expired - Fee Related DE3886070T2 (de) 1987-03-03 1988-03-02 Schaltung zur vollständigen oder teilweisen Annullierung einer Wellenform mit nichtrekursiven und rekursiven Filtern.

Country Status (5)

Country Link
US (1) US5042026A (de)
EP (1) EP0281101B1 (de)
AU (1) AU606392B2 (de)
CA (1) CA1288826C (de)
DE (1) DE3886070T2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19955596A1 (de) * 1999-11-18 2001-06-13 Infineon Technologies Ag Vorrichtung und Verfahren zur Echokompensation bei Gleichlage-Übertragungsverfahren im Duplex-Betrieb über eine Zweidrahtleitung

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0750863B2 (ja) * 1987-09-25 1995-05-31 日本電気株式会社 受信器
SE461308B (sv) * 1988-06-03 1990-01-29 Ericsson Telefon Ab L M Adaptivt digitalt filter omfattande en icke rekursiv del och en rekursiv del
JPH0748681B2 (ja) * 1989-02-23 1995-05-24 日本電気株式会社 エコー消去器の係数制御方法
US5388092A (en) * 1989-06-27 1995-02-07 Nec Corporation Echo canceller for two-wire full duplex digital data transmission
EP0420269A3 (en) * 1989-09-28 1992-12-30 Fujitsu Limited Adaptive digital filter including low-pass filter
JPH03262939A (ja) * 1990-03-14 1991-11-22 Fujitsu Ltd エコー経路変動検出方法およびその装置
DE4106858A1 (de) * 1991-03-04 1992-09-10 Siemens Ag Anordnung zum herausfiltern von grundlinienschwankungen aus physiologischen messsignalen
US5293402A (en) * 1991-05-02 1994-03-08 Bell Communications Research, Inc. Wideband digital equalizers for subscriber loops
JPH04369932A (ja) * 1991-06-19 1992-12-22 Hitachi Ltd エコーキャンセラ、および、それを用いた伝送装置
KR950006697B1 (ko) * 1992-06-09 1995-06-21 대우전자주식회사 적응적 하울링 제거 장치
FI97002C (fi) * 1993-12-17 1996-09-25 Eero Juhani Pajarre Suora FIR-suodatin, menetelmä pistetulon laskemiseksi FIR-suodattimessa ja menetelmä suoran FIR-suodattimen suunnittelemiseksi
FR2729024A1 (fr) * 1994-12-30 1996-07-05 Matra Communication Annuleur d'echo acoustique avec filtrage en sous-bandes
JP2728120B2 (ja) * 1995-01-24 1998-03-18 日本電気株式会社 エコーキャンセラ装置
US5682378A (en) * 1995-11-14 1997-10-28 Paradyne Corporation Echo cancellation for modems
US6249696B1 (en) 1999-01-15 2001-06-19 Medtronic Physio-Control Manufacturing Corp. Method and apparatus for increasing the low frequency dynamic range of a digital ECG measuring system
US6280391B1 (en) 1999-02-08 2001-08-28 Physio-Control Manufacturing Corporation Method and apparatus for removing baseline wander from an egg signal
KR100477638B1 (ko) * 2001-09-11 2005-03-23 삼성전자주식회사 ２ｄ／３ｄ 겸용 디스플레이
US7215765B2 (en) * 2002-06-24 2007-05-08 Freescale Semiconductor, Inc. Method and apparatus for pure delay estimation in a communication system
US6961423B2 (en) 2002-06-24 2005-11-01 Freescale Semiconductor, Inc. Method and apparatus for performing adaptive filtering
US7242762B2 (en) * 2002-06-24 2007-07-10 Freescale Semiconductor, Inc. Monitoring and control of an adaptive filter in a communication system
US7388954B2 (en) * 2002-06-24 2008-06-17 Freescale Semiconductor, Inc. Method and apparatus for tone indication
WO2015068106A1 (en) * 2013-11-08 2015-05-14 Koninklijke Philips N.V. Ecg high pass filter
US10305451B1 (en) * 2017-12-12 2019-05-28 Texas Instruments Incorporated Multiplier-based programmable filters

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7416480A (nl) * 1974-12-18 1976-06-22 Philips Nv Inrichting bevattende een integrerende digitale signaalbewerkingsinrichting.
US4057696A (en) * 1976-08-09 1977-11-08 Bell Telephone Laboratories, Incorporated Recursive-like adaptive echo canceller
US4321705A (en) * 1979-03-02 1982-03-23 Nippon Electronics Co., Ltd. Digital equalizer for a cross-polarization receiver
DE3414129A1 (de) * 1984-04-14 1985-10-24 Standard Elektrik Lorenz Ag, 7000 Stuttgart Adaptiver entzerrer fuer digitale nachrichtenuebertragungssysteme mit einer uebertragungsgeschwindigkeit oberhalb der nyquistfrequenz
GB2164827B (en) * 1984-09-19 1988-04-20 Nec Corp Method of cancelling echoes in full-duplex data transmission system
JPS61264825A (ja) * 1985-05-20 1986-11-22 Oki Electric Ind Co Ltd 適応予測形デイジタルエコ−キヤンセラ
AR241298A1 (es) * 1985-10-03 1992-04-30 Siemens Ag Ecualizador transversal adaptivo .
NL8502767A (nl) * 1985-10-10 1987-05-04 Philips Nv Zelfinstellend filter.
US4868874A (en) * 1986-04-18 1989-09-19 Hitachi, Ltd. Echo canceller

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19955596A1 (de) * 1999-11-18 2001-06-13 Infineon Technologies Ag Vorrichtung und Verfahren zur Echokompensation bei Gleichlage-Übertragungsverfahren im Duplex-Betrieb über eine Zweidrahtleitung
US6856684B1 (en) 1999-11-18 2005-02-15 Infineon Technologies Ag Device and method for echo compensation in a two-wire full duplex channel transmission method

Also Published As

Publication number Publication date
EP0281101A3 (en) 1990-01-31
AU1253988A (en) 1988-09-01
AU606392B2 (en) 1991-02-07
EP0281101A2 (de) 1988-09-07
US5042026A (en) 1991-08-20
EP0281101B1 (de) 1993-12-08
CA1288826C (en) 1991-09-10
DE3886070D1 (de) 1994-01-20

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee