DK301783A - Balancefilter af fir-type som indgaar i sender-modtagerenheden i et telekommunikationsanlaeg - Google Patents

Balancefilter af fir-type som indgaar i sender-modtagerenheden i et telekommunikationsanlaeg Download PDF

Info

Publication number: DK301783A
Authority: DK; Denmark
Prior art keywords: fir; receiver unit; telecommunication system; filter included; type balance
Prior art date: 1981-11-02

Application number

DK301783A

Other languages

English (en)

Other versions

DK301783D0 (da

Inventor

Bengt Roland Carlqvist

Lars Tommy Edvard Svensson

Original Assignee

Ericsson Telefon Ab L M

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.)

1981-11-02

Filing date

1983-06-30

Publication date

1983-06-30

1983-06-30 Application filed by Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M

1983-06-30 Publication of DK301783A publication Critical patent/DK301783A/da

1983-06-30 Publication of DK301783D0 publication Critical patent/DK301783D0/da

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
- 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
- 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
- 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)
Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Filters That Use Time-Delay Elements (AREA)
Circuits Of Receivers In General (AREA)
Selective Calling Equipment (AREA)
Bidirectional Digital Transmission (AREA)

DK3017/83A 1981-11-02 1983-06-30 Balancefilter af fir-type som indgar i sender-modtagerenheden i et telekommunikationsanlaeg DK301783D0 (da)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
SE8106445A SE426765B (sv)	1981-11-02	1981-11-02	Balansfilter av fir-typ ingaende i sendar-mottagarenheten i ett telekommunikationssystem
PCT/SE1982/000362 WO1983001715A1 (en)	1981-11-02	1982-11-02	An fir-type balance filter incorporated in the transmitter-receiver unit in a telecommunication system

Publications (2)

Publication Number	Publication Date
DK301783A true DK301783A (da)	1983-06-30
DK301783D0 DK301783D0 (da)	1983-06-30

Family

ID=20344931

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
DK3017/83A DK301783D0 (da)	1981-11-02	1983-06-30	Balancefilter af fir-type som indgar i sender-modtagerenheden i et telekommunikationsanlaeg

Country Status (18)

Country	Link
US (1)	US4571719A (da)
EP (1)	EP0092569B1 (da)
JP (1)	JPS58501849A (da)
KR (1)	KR870000629B1 (da)
AU (1)	AU553371B2 (da)
BR (1)	BR8207952A (da)
DE (1)	DE3261072D1 (da)
DK (1)	DK301783D0 (da)
ES (1)	ES8308178A1 (da)
FI (1)	FI73104C (da)
IE (1)	IE53760B1 (da)
IT (1)	IT1153339B (da)
MX (1)	MX152128A (da)
MY (1)	MY100485A (da)
NO (1)	NO157239C (da)
SE (1)	SE426765B (da)
WO (1)	WO1983001715A1 (da)
YU (1)	YU244382A (da)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4605826A (en) *	1982-06-23	1986-08-12	Nec Corporation	Echo canceler with cascaded filter structure
US4669116A (en) *	1982-12-09	1987-05-26	Regents Of The University Of California	Non-linear echo cancellation of data signals
IT1208769B (it) *	1983-10-12	1989-07-10	Cselt Centro Studi Lab Telecom	Teristiche varianti nel tempo procedimento e dispositivo per la cancellazione numerica dell eco generato in collegamenti con carat
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.
US4868874A (en) *	1986-04-18	1989-09-19	Hitachi, Ltd.	Echo canceller
EP0255554B1 (de) *	1986-08-07	1991-05-08	Deutsche ITT Industries GmbH	Nichtrekursives Digitalfilter
EP0280898A1 (de) *	1987-02-18	1988-09-07	Siemens Aktiengesellschaft	Schaltungsanordnung zum Unterdrücken von Echosignalen
JP2581763B2 (ja) *	1988-06-15	1997-02-12	株式会社日立製作所	エコーキャンセラ
CA1315356C (en) *	1988-07-20	1993-03-30	Seiji Miyoshi	Digital adaptive filter and method of convergence therein
CA2004379C (en) *	1988-12-01	1993-07-06	Tetsu Taguchi	Echo canceller with means for determining filter coefficients from autocorrelation and cross-correlation coefficients
US4982428A (en) *	1988-12-29	1991-01-01	At&T Bell Laboratories	Arrangement for canceling interference in transmission systems
DE19645054C2 (de) *	1996-10-31	1999-11-25	Sgs Thomson Microelectronics	Vorrichtung und Verfahren zur Selektion von Adressenwörtern
US8718474B2 (en) *	2011-05-27	2014-05-06	Nec Laboratories America, Inc.	Chromatic dispersion compensation using sign operations and lookup tables

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2277470A1 (fr) *	1974-07-03	1976-01-30	Cit Alcatel	Dispositif de centrage d'un filtre transversal d'un annuleur d'echo
NL170688C (nl) *	1976-06-28	1982-12-01	Philips Nv	Inrichting voor simultane tweerichtingsdatatransmissie over tweedraadsverbindingen.
DE2801375C3 (de) *	1977-01-17	1982-01-28	Télécommunications Radioélectriques et Téléphoniques T.R.T., 75013 Paris	Digitaler Echokompensator für einen Modem zur Datenübertragung mit Hilfe von Modulation eines Trägers
DE2729109A1 (de) *	1977-06-28	1979-01-11	Siemens Ag	Schaltungsanordnung zur kompensation von echos in nichtsynchronen traegerfrequenzsystemen
JPS54157407A (en) *	1978-06-02	1979-12-12	Hitachi Ltd	Level control unit for time-division exchange
US4268727A (en) *	1979-03-14	1981-05-19	International Telephone And Telegraph Corporation	Adaptive digital echo cancellation circuit
FR2479617A1 (fr) *	1980-03-26	1981-10-02	Trt Telecom Radio Electr	Annuleur d'echo pour signal d'echo a phase variable
US4425483A (en) *	1981-10-13	1984-01-10	Northern Telecom Limited	Echo cancellation using transversal filters

1981
- 1981-11-02 SE SE8106445A patent/SE426765B/sv not_active IP Right Cessation
1982
- 1982-10-28 MX MX194979A patent/MX152128A/es unknown
- 1982-10-29 IE IE2606/82A patent/IE53760B1/en unknown
- 1982-10-29 ES ES516966A patent/ES8308178A1/es not_active Expired
- 1982-11-01 YU YU02443/82A patent/YU244382A/xx unknown
- 1982-11-02 US US06/514,824 patent/US4571719A/en not_active Expired - Lifetime
- 1982-11-02 DE DE8282903351T patent/DE3261072D1/de not_active Expired
- 1982-11-02 EP EP82903351A patent/EP0092569B1/en not_active Expired
- 1982-11-02 AU AU91221/82A patent/AU553371B2/en not_active Ceased
- 1982-11-02 WO PCT/SE1982/000362 patent/WO1983001715A1/en not_active Ceased
- 1982-11-02 BR BR8207952A patent/BR8207952A/pt not_active IP Right Cessation
- 1982-11-02 JP JP82503354A patent/JPS58501849A/ja active Pending
- 1982-11-02 KR KR8204930A patent/KR870000629B1/ko not_active Expired
- 1982-11-02 IT IT24026/82A patent/IT1153339B/it active
1983
- 1983-06-17 FI FI832229A patent/FI73104C/sv not_active IP Right Cessation
- 1983-06-30 DK DK3017/83A patent/DK301783D0/da not_active Application Discontinuation
- 1983-07-01 NO NO83832421A patent/NO157239C/no unknown
1985
- 1985-12-30 MY MY1004/85A patent/MY100485A/xx unknown

Also Published As

Publication number	Publication date
SE426765B (sv)	1983-02-07
KR840002599A (ko)	1984-07-02
AU553371B2 (en)	1986-07-10
MX152128A (es)	1985-05-30
NO832421L (no)	1983-07-01
EP0092569B1 (en)	1984-10-24
FI832229A0 (fi)	1983-06-17
MY100485A (en)	1985-12-31
NO157239C (no)	1988-02-10
FI73104B (fi)	1987-04-30
EP0092569A1 (en)	1983-11-02
IT8224026A1 (it)	1984-05-02
IT1153339B (it)	1987-01-14
IE53760B1 (en)	1989-02-01
DK301783D0 (da)	1983-06-30
JPS58501849A (ja)	1983-10-27
BR8207952A (pt)	1983-10-04
AU9122182A (en)	1983-05-18
ES516966A0 (es)	1983-08-01
WO1983001715A1 (en)	1983-05-11
NO157239B (no)	1987-11-02
ES8308178A1 (es)	1983-08-01
FI832229L (fi)	1983-06-17
DE3261072D1 (en)	1984-11-29
US4571719A (en)	1986-02-18
IT8224026A0 (it)	1982-11-02
KR870000629B1 (ko)	1987-03-26
YU244382A (en)	1985-03-20
FI73104C (sv)	1987-08-10
IE822606L (en)	1983-05-02

Publication	Publication Date	Title
FI834633L (fi)	1985-06-17	Automatiskt reningssystem foer filter.
ES515913A0 (es)	1983-09-16	Perfeccionamientos en dispositivos de filtracion de multiples cartuchos.
DK22082A (da)	1982-07-21	Baandkassette af miniaturetype
DK490783D0 (da)	1983-10-26	Kommunikationsnet med multiprocessorsystemer
DE3486456D1 (de)	1997-11-06	Nachrichtennetzsystem
IT8467244A1 (it)	1985-09-16	Occhiali a frontale amovibile.
DK154068C (da)	1989-02-27	Addukt af cis-diklor-trans-dihydroxy-bis-(isopropylamin)-platin(iv)
DK301783A (da)	1983-06-30	Balancefilter af fir-type som indgaar i sender-modtagerenheden i et telekommunikationsanlaeg
NL192171B (nl)	1996-10-01	Optische demultiplexer.
DK378585A (da)	1985-08-20	Separatorer til separering af fluider
DK516784D0 (da)	1984-10-30	Roerformet filter, navnlig til filtrering af vaesker
GB2103445B (en)	1985-03-27	Saw filter network
ES530736A0 (es)	1985-02-01	Perfeccionamientos en los sistemas telefonicos
DK44885D0 (da)	1985-02-01	Indretning til tilberedning af porebeton
DK62181A (da)	1981-08-16	Praeparat til fjernelse af maling
DE3484728D1 (de)	1991-07-25	Optische empfaenger.
DK160070C (da)	1991-06-10	Apparatur til overfoering af data
ATA450680A (de)	1986-10-15	Rekonfigurierbares verbindungsnetzwerk
ES503894A0 (es)	1982-06-01	Mejoras en componentes de conexion a la red para televisores
JPS56136566A (en)	1981-10-24	Filtration type artificial kidney device
DK479381A (da)	1983-05-01	Fremgangsmaade til udligning af et vandvaerks filterspidsbelastning
ATE64673T1 (de)	1991-07-15	Optische empfaenger.
DK372483D0 (da)	1983-08-15	Apparat til ladning af lagre i en telekommunikationscentral
GB2108356B (en)	1984-12-12	Arrangement at telephone exchanges particularly for connecting such exchanges with each other for example through a line separated from the public telephone network
ATE36204T1 (de)	1988-08-15	Kleinbild-stereo-system.

Legal Events

Date	Code	Title	Description
1989-02-06	ATS	Application withdrawn