FI850056A0 - Adaptivt digitalfilter. - Google Patents

Adaptivt digitalfilter.

Info

Publication number: FI850056A0
Authority: FI; Finland
Prior art keywords: adaptivt; digitalfilter; adaptivt digitalfilter
Prior art date: 1984-01-12

Application number

FI850056A

Other languages

English (en)

Other versions

FI87863B (fi

FI850056L (fi

FI87863C (fi

Inventor

Peter Frank Adams

Original Assignee

British Telecomm

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.)

1984-01-12

Filing date

1985-01-07

Publication date

1985-01-07

1985-01-07 Application filed by British Telecomm filed Critical British Telecomm

1985-01-07 Publication of FI850056A0 publication Critical patent/FI850056A0/fi

1985-07-13 Publication of FI850056L publication Critical patent/FI850056L/fi

1992-11-13 Publication of FI87863B publication Critical patent/FI87863B/fi

1993-02-25 Application granted granted Critical

1993-02-25 Publication of FI87863C publication Critical patent/FI87863C/fi

Links

Classifications

- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H21/00—Adaptive networks
- H03H21/0012—Digital adaptive filters
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H17/00—Networks using digital techniques
- H03H17/02—Frequency selective networks
- H03H17/06—Non-recursive filters
- H03H17/0607—Non-recursive filters comprising a ROM addressed by the input data signals
- 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
- H04B3/231—Echo cancellers using readout of a memory to provide the echo replica
- 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)
Computer Networks & Wireless Communication (AREA)
Signal Processing (AREA)
Physics & Mathematics (AREA)
Computer Hardware Design (AREA)
Mathematical Physics (AREA)
Filters That Use Time-Delay Elements (AREA)
Complex Calculations (AREA)
Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

FI850056A 1984-01-12 1985-01-07 Adaptivt digitalfilter FI87863C (fi)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
GB8400791		1984-01-12
GB848400791A GB8400791D0 (en)	1984-01-12	1984-01-12	Digital filter

Publications (4)

Publication Number	Publication Date
FI850056A0 true FI850056A0 (fi)	1985-01-07
FI850056L FI850056L (fi)	1985-07-13
FI87863B FI87863B (fi)	1992-11-13
FI87863C FI87863C (fi)	1993-02-25

Family

ID=10554887

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FI850056A FI87863C (fi)	1984-01-12	1985-01-07	Adaptivt digitalfilter

Country Status (7)

Country	Link
US (1)	US4694451A (fi)
EP (1)	EP0152172A1 (fi)
JP (1)	JPS60160721A (fi)
AU (1)	AU564747B2 (fi)
CA (1)	CA1241382A (fi)
FI (1)	FI87863C (fi)
GB (1)	GB8400791D0 (fi)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB8400791D0 (en) *	1984-01-12	1984-02-15	British Telecomm	Digital filter
GB8427165D0 (en) *	1984-10-26	1984-12-05	British Telecomm	Adaptive recognising device
GB8511835D0 (en) *	1985-05-10	1985-06-19	British Telecomm	Adaptive digital filter
NL8600817A (nl) *	1986-03-28	1987-10-16	At & T & Philips Telecomm	Adaptief filter voor het vormen van een echokompensatiesignaal in een zend-ontvangstelsel voor het in duplexvorm bedrijven van digitale communicatie over een enkel geleiderpaar.
EP0280898A1 (de) *	1987-02-18	1988-09-07	Siemens Aktiengesellschaft	Schaltungsanordnung zum Unterdrücken von Echosignalen
US6272241B1 (en)	1989-03-22	2001-08-07	British Telecommunications Public Limited Company	Pattern recognition
US5146494A (en) *	1989-07-31	1992-09-08	At&T Bell Laboratories	Overlapping look-up-and-add echo canceller requiring a smaller memory size
GB2248532A (en) *	1990-10-01	1992-04-08	Philips Electronic Associated	Digital filters
DE69020568D1 (de) *	1990-10-30	1995-08-03	Ibm	Selbsttrainierendes adaptives Entzerrungsverfahren und -vorrichtung.
JPH04270510A (ja) *	1990-12-28	1992-09-25	Advantest Corp	ディジタルフィルタ及び送信機
US5384806A (en) *	1991-09-23	1995-01-24	At&T Bell Laboratories	Modem with time-invariant echo path
US5329586A (en) *	1992-05-29	1994-07-12	At&T Bell Laboratories	Nonlinear echo canceller for data signals using a non-redundant distributed lookup-table architecture
US5424881A (en)	1993-02-01	1995-06-13	Cirrus Logic, Inc.	Synchronous read channel
FR2701784B1 (fr) *	1993-02-18	1995-05-12	Matra Sep Imagerie Inf	Procédé et dispositif d'amortissement actif de vibrations.
KR0181165B1 (ko) *	1995-06-29	1999-04-01	김광호	유한장 임펄스응답 필터 및 그 필터링 방법
US5793820A (en) *	1996-07-10	1998-08-11	Intellon Corporation	Automatic adaptive filtering according to frequency modulation rate
US7079498B2 (en) *	2002-06-14	2006-07-18	Intel Corporation	Method, apparatus, and system for reducing memory requirements for echo cancellers
US9616713B2 (en) *	2010-08-30	2017-04-11	The Goodyear Tire & Rubber Company	Non-pneumatic tire

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2118410A5 (fi) *	1970-12-17	1972-07-28	Ibm France
FR2379946A1 (fr) *	1977-02-04	1978-09-01	Labo Cent Telecommunicat	Filtre numerique
JPS5646320A (en) *	1979-09-22	1981-04-27	Kokusai Denshin Denwa Co Ltd <Kdd>	Digital filter
US4435823A (en) *	1980-12-29	1984-03-06	Harris Corporation	Adaptive equalizer capable of linear and nonlinear weighting
GB8400791D0 (en) *	1984-01-12	1984-02-15	British Telecomm	Digital filter

1984
- 1984-01-12 GB GB848400791A patent/GB8400791D0/en active Pending
1985
- 1985-01-07 FI FI850056A patent/FI87863C/fi not_active IP Right Cessation
- 1985-01-10 US US06/690,193 patent/US4694451A/en not_active Expired - Lifetime
- 1985-01-10 EP EP85300173A patent/EP0152172A1/en not_active Withdrawn
- 1985-01-10 AU AU37592/85A patent/AU564747B2/en not_active Ceased
- 1985-01-11 JP JP60003134A patent/JPS60160721A/ja active Pending
- 1985-01-11 CA CA000471952A patent/CA1241382A/en not_active Expired

Also Published As

Publication number	Publication date
JPS60160721A (ja)	1985-08-22
EP0152172A1 (en)	1985-08-21
US4694451A (en)	1987-09-15
GB8400791D0 (en)	1984-02-15
AU3759285A (en)	1985-07-18
FI87863B (fi)	1992-11-13
CA1241382A (en)	1988-08-30
FI850056L (fi)	1985-07-13
AU564747B2 (en)	1987-08-27
FI87863C (fi)	1993-02-25

Legal Events

Date	Code	Title	Description
2004-08-31	MM	Patent lapsed	Owner name: BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY

Publication	Publication Date	Title
DE3583455D1 (de)	1991-08-22	Salbenbase.
DE3581430D1 (de)	1991-02-28	Detergens.
DE3576268D1 (de)	1990-04-05	Hoergeraet.
ATE41922T1 (de)	1989-04-15	Alkylsulfonamidophenylalkylamine.
DE3585265D1 (de)	1992-03-05	Fibronektinpraeparate.
FI860488A (fi)	1986-02-03	Anordning foer membrandestillation.
DE3581707D1 (de)	1991-03-14	Neigungsmesser.
DE3583080D1 (de)	1991-07-11	Mikrorechner.
FI850056L (fi)	1985-07-13	Adaptivt digitalfilter.
FI854906A0 (fi)	1985-12-11	Pesticider.
IT8523000A0 (it)	1985-11-27	Colecalciferol-derivati.
FI853689A0 (fi)	1985-09-25	Inskjutbar elektrisk byggenhet.
DE3578421D1 (de)	1990-08-02	Glycidyloxydiketone.
DE3582060D1 (de)	1991-04-11	Homopropargylamine.
FI73926B (fi)	1987-08-31	Standardhastighetsregulator foer motorfordon.
FI853661A0 (fi)	1985-09-24	Skruv.
DE3577708D1 (de)	1990-06-21	Diphenylhexafluorpropanabkoemmlinge.
DE3584628D1 (de)	1991-12-12	Xenocoumacine.
FI851192L (fi)	1985-10-03	Foerdelningsanordning foer suspensioner.
DE3579862D1 (de)	1990-10-31	Mikrorechner.
DE3587711D1 (de)	1994-02-10	Minaktivin.
DE3574867D1 (de)	1990-01-25	Aminokarnitine.
DE3574494D1 (de)	1990-01-04	Selbstzerlegerzuender.
FI861307A0 (fi)	1986-03-26	Snoehinderanordning.
DE3576291D1 (de)	1990-04-12	Entaester.