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KR840002599A - 전기통신 계통에서 송수신기에 설치되는 유한 임펄스 응답형 평형용 여파기 - Google Patents

전기통신 계통에서 송수신기에 설치되는 유한 임펄스 응답형 평형용 여파기 Download PDF

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Publication number
KR840002599A
KR840002599A KR1019820004930A KR820004930A KR840002599A KR 840002599 A KR840002599 A KR 840002599A KR 1019820004930 A KR1019820004930 A KR 1019820004930A KR 820004930 A KR820004930 A KR 820004930A KR 840002599 A KR840002599 A KR 840002599A
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KR
South Korea
Prior art keywords
filter
group
balanced
memory device
output signal
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KR1019820004930A
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KR870000629B1 (ko
Inventor
로오란드 칼그비스트(외1) 벵트
Original Assignee
케이-에이 루우넬, 벵크 겜스토오프
테레포오낙리이에보라켓트 엘 엠 엘리크썬
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Publication of KR840002599A publication Critical patent/KR840002599A/ko
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Publication of KR870000629B1 publication Critical patent/KR870000629B1/ko
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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

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  • 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)
  • Bidirectional Digital Transmission (AREA)
  • Selective Calling Equipment (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

내용 없음.

Description

전기통신 계통에서 송수신기에 설치되는 유한 임펄스 응답형 평형용 여파기
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 데이타(data)의 동시 송수통신을 위한 송수신기의 구성도.
제2도는 본 발명에 따른 평형용 여파기(Balance Filter)의 구성도.
제3도는 제2도에 도시된 평형용 여파기의 다른 구조에 포함된 유한 임펄스 응답(FIR:Finite Impulse response) 여파기의 구성도.

Claims (3)

1쌍의 도선으로 전기통신 계통에서 디지탈 정보를 동시 송수통신하도록 된 송수신기에 포함되어진 다수의 지연링크와 평형용 여파기의 출력신호(yk)가 발췌시간(k=1,2,…)에서 지역송신측에서 수신측으로 흐르는 누설신호와 동일해지도록 하여 여파기매개변수(cj)를 보정하는 최소한 하나의 보정기(KB1)와 여파기에 있는 지연링크(T1,T2,…)의 총수는 최소한 2개의 군으로 분리되어 제1군에(N1) 제2군에 (N2)를구성하며, 변지기(AE1)가 제1군의 링크에 연결되어 데이타(bk, k=1,2,… N1)에 의하여 번지를 형성하고, 변지기(AE1)에 연결되는 기억소자(M1)와 상기한 기억소자는 다수의 출력신호의 값들을 지정하며 상기한 출력신호는 여파기 매개변수를 형성하고 번지게 의하여 추출되며 상기한 보정기에 의하여 새롭게 변화되도록 배열되어지는 유한 임펄스 응답형 평형용 여파기.
특허청구의 범위 제1항에 따른 평형용 여파기로서 (N2)의 지연링크로 형성되는 제2군은 번지기(AE2)에 연결되어 (N1)의 데이타가 여파기로 인입된 후 N2=N-N1의 전송된 데이타(bk, k=N1+1,···, N)로부터 번지를 형성하며, 상기한 번지기(AE2)에 연결되는 기억소자(M2)와 상기한 기억소자(M2)는 번지기(AE2)으로부터 추출되며 여파기의 매개변수를 형성하는 (N2)의 출력신호를 저항하도록 된 평형용 여파기.
특허청구의 범위 제1항에 따른 평형용 여파기로서 기억소자에 저장된 계수(cj)에 의하여 여파기 군으로 인입되는 값(bk)을 벡터 급하는 트랜스버설 여파기의 일부를 구성하는 제2군의 지연링크로 이루어진 평형용 여파기.
※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR8204930A 1981-11-02 1982-11-02 장거리 통신 시스템의 송수신기에 포함되는 유한 임펄스응답형 평형용 여파기 Expired KR870000629B1 (ko)

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
SE8106445-3 1981-11-02

Publications (2)

Publication Number Publication Date
KR840002599A true KR840002599A (ko) 1984-07-02
KR870000629B1 KR870000629B1 (ko) 1987-03-26

Family

ID=20344931

Family Applications (1)

Application Number Title Priority Date Filing Date
KR8204930A Expired KR870000629B1 (ko) 1981-11-02 1982-11-02 장거리 통신 시스템의 송수신기에 포함되는 유한 임펄스응답형 평형용 여파기

Country Status (18)

Country Link
US (1) US4571719A (ko)
EP (1) EP0092569B1 (ko)
JP (1) JPS58501849A (ko)
KR (1) KR870000629B1 (ko)
AU (1) AU553371B2 (ko)
BR (1) BR8207952A (ko)
DE (1) DE3261072D1 (ko)
DK (1) DK301783A (ko)
ES (1) ES516966A0 (ko)
FI (1) FI73104C (ko)
IE (1) IE53760B1 (ko)
IT (1) IT1153339B (ko)
MX (1) MX152128A (ko)
MY (1) MY100485A (ko)
NO (1) NO157239C (ko)
SE (1) SE426765B (ko)
WO (1) WO1983001715A1 (ko)
YU (1) YU244382A (ko)

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
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

Also Published As

Publication number Publication date
FI832229L (fi) 1983-06-17
FI73104C (sv) 1987-08-10
DE3261072D1 (en) 1984-11-29
US4571719A (en) 1986-02-18
ES8308178A1 (es) 1983-08-01
JPS58501849A (ja) 1983-10-27
YU244382A (en) 1985-03-20
EP0092569A1 (en) 1983-11-02
KR870000629B1 (ko) 1987-03-26
SE426765B (sv) 1983-02-07
EP0092569B1 (en) 1984-10-24
WO1983001715A1 (en) 1983-05-11
DK301783D0 (da) 1983-06-30
FI73104B (fi) 1987-04-30
AU553371B2 (en) 1986-07-10
IT8224026A0 (it) 1982-11-02
DK301783A (da) 1983-06-30
IE822606L (en) 1983-05-02
FI832229A0 (fi) 1983-06-17
IT1153339B (it) 1987-01-14
ES516966A0 (es) 1983-08-01
NO157239C (no) 1988-02-10
MY100485A (en) 1985-12-31
MX152128A (es) 1985-05-30
NO832421L (no) 1983-07-01
NO157239B (no) 1987-11-02
IE53760B1 (en) 1989-02-01
BR8207952A (pt) 1983-10-04
AU9122182A (en) 1983-05-18

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