SE426765B - Balansfilter av fir-typ ingaende i sendar-mottagarenheten i ett telekommunikationssystem - Google Patents

Balansfilter av fir-typ ingaende i sendar-mottagarenheten i ett telekommunikationssystem

Info

Publication number
SE426765B
SE426765B SE8106445A SE8106445A SE426765B SE 426765 B SE426765 B SE 426765B SE 8106445 A SE8106445 A SE 8106445A SE 8106445 A SE8106445 A SE 8106445A SE 426765 B SE426765 B SE 426765B
Authority
SE
Sweden
Prior art keywords
filter
output
group
unit
signal
Prior art date
Application number
SE8106445A
Other languages
English (en)
Swedish (sv)
Inventor
T Svensson
B Carlqvist
Original Assignee
Ellemtel Utvecklings Ab
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 Ellemtel Utvecklings Ab filed Critical Ellemtel Utvecklings Ab
Priority to SE8106445A priority Critical patent/SE426765B/sv
Priority to MX194979A priority patent/MX152128A/es
Priority to ES516966A priority patent/ES516966A0/es
Priority to IE2606/82A priority patent/IE53760B1/en
Priority to YU02443/82A priority patent/YU244382A/xx
Priority to BR8207952A priority patent/BR8207952A/pt
Priority to US06/514,824 priority patent/US4571719A/en
Priority to KR8204930A priority patent/KR870000629B1/ko
Priority to DE8282903351T priority patent/DE3261072D1/de
Priority to JP82503354A priority patent/JPS58501849A/ja
Priority to PCT/SE1982/000362 priority patent/WO1983001715A1/en
Priority to IT24026/82A priority patent/IT1153339B/it
Priority to AU91221/82A priority patent/AU553371B2/en
Priority to EP82903351A priority patent/EP0092569B1/en
Publication of SE426765B publication Critical patent/SE426765B/sv
Priority to FI832229A priority patent/FI73104C/sv
Priority to DK3017/83A priority patent/DK301783D0/da
Priority to NO83832421A priority patent/NO157239C/no
Priority to MY1004/85A priority patent/MY100485A/xx

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
    • 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)
SE8106445A 1981-11-02 1981-11-02 Balansfilter av fir-typ ingaende i sendar-mottagarenheten i ett telekommunikationssystem SE426765B (sv)

Priority Applications (18)

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
MX194979A MX152128A (es) 1981-11-02 1982-10-28 Mejoras en filtro equilibrador para un sistema de telecomunicaciones
ES516966A ES516966A0 (es) 1981-11-02 1982-10-29 Un filtro de equilibrio del tipo de respuesta de impulsos finitos, destinado a utilizarse en un sistema de telecomunicacion.
IE2606/82A IE53760B1 (en) 1981-11-02 1982-10-29 A balance filter for a telecommunication system
YU02443/82A YU244382A (en) 1981-11-02 1982-11-01 Balance filter for a final pulse interrogation built into the retrieving unit of a tele retrieving unit of a telecommunication system
JP82503354A JPS58501849A (ja) 1981-11-02 1982-11-02 電気通信システムにおける送受信装置に組み込まれたｆｉｒ型平衡フイルタ
AU91221/82A AU553371B2 (en) 1981-11-02 1982-11-02 An fir-type balance filter incorporated in the transmitter- receiver unit in a telecommunication system
KR8204930A KR870000629B1 (ko) 1981-11-02 1982-11-02 장거리 통신 시스템의 송수신기에 포함되는 유한 임펄스응답형 평형용 여파기
DE8282903351T DE3261072D1 (en) 1981-11-02 1982-11-02 A fir-type balance filter incorporated in the transmitter-receiver unit in a telecommunication system
BR8207952A BR8207952A (pt) 1981-11-02 1982-11-02 Um filtro de equilibrio tipo"fir"incorporado na unidade transmissora-receptora em um sistema de telecomunicacao
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
IT24026/82A IT1153339B (it) 1981-11-02 1982-11-02 Filtro di bilanciamento incorporato nell'unita' trasmittente ricevente di un sistema di telecomunicazioni
US06/514,824 US4571719A (en) 1981-11-02 1982-11-02 FIR-Type balance filter incorporated in the transmitter-receiver unit in a telecommunication system
EP82903351A EP0092569B1 (en) 1981-11-02 1982-11-02 A fir-type balance filter incorporated in the transmitter-receiver unit in a telecommunication system
FI832229A FI73104C (sv) 1981-11-02 1983-06-17 Balansfilter av FIR-typ ingående i sändar-mottagarenheten i ett telek ommunikationssystem.
DK3017/83A DK301783D0 (da) 1981-11-02 1983-06-30 Balancefilter af fir-type som indgar i sender-modtagerenheden i et telekommunikationsanlaeg
NO83832421A NO157239C (no) 1981-11-02 1983-07-01 Balansefilter av fir-type som inngaar i sender-mottaker-enheten i et telekommunikasjonssystem.
MY1004/85A MY100485A (en) 1981-11-02 1985-12-30 A fir-tyre balance filter incorporated in the transmitter-receiver unit in a telecommunication system

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
SE426765B true SE426765B (sv) 1983-02-07

Family

ID=20344931

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8106445A SE426765B (sv) 1981-11-02 1981-11-02 Balansfilter av fir-typ ingaende i sendar-mottagarenheten i ett telekommunikationssystem

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) ES516966A0 (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
DE3679190D1 (de) * 1986-08-07 1991-06-13 Itt Ind Gmbh Deutsche 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
US5062102A (en) * 1988-12-01 1991-10-29 Nec Corporation 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.
AU514263B2 (en) * 1977-01-17 1981-01-29 T.R.T. Digital echo canceller
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

Also Published As

Publication number Publication date
KR840002599A (ko) 1984-07-02
FI73104B (fi) 1987-04-30
WO1983001715A1 (en) 1983-05-11
AU9122182A (en) 1983-05-18
IT8224026A0 (it) 1982-11-02
KR870000629B1 (ko) 1987-03-26
FI832229L (fi) 1983-06-17
EP0092569A1 (en) 1983-11-02
IT8224026A1 (it) 1984-05-02
IE53760B1 (en) 1989-02-01
FI73104C (sv) 1987-08-10
JPS58501849A (ja) 1983-10-27
NO157239C (no) 1988-02-10
BR8207952A (pt) 1983-10-04
MX152128A (es) 1985-05-30
DK301783A (da) 1983-06-30
EP0092569B1 (en) 1984-10-24
IT1153339B (it) 1987-01-14
ES8308178A1 (es) 1983-08-01
US4571719A (en) 1986-02-18
DK301783D0 (da) 1983-06-30
IE822606L (en) 1983-05-02
MY100485A (en) 1985-12-31
NO832421L (no) 1983-07-01
YU244382A (en) 1985-03-20
NO157239B (no) 1987-11-02
FI832229A0 (fi) 1983-06-17
DE3261072D1 (en) 1984-11-29
ES516966A0 (es) 1983-08-01
AU553371B2 (en) 1986-07-10

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