KR840002599A - 전기통신 계통에서 송수신기에 설치되는 유한 임펄스 응답형 평형용 여파기 - Google Patents
전기통신 계통에서 송수신기에 설치되는 유한 임펄스 응답형 평형용 여파기 Download PDFInfo
- 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
- Authority
- KR
- South Korea
- Prior art keywords
- filter
- group
- balanced
- memory device
- output signal
- Prior art date
Links
- 230000004044 response Effects 0.000 claims description 2
- 230000003111 delayed effect Effects 0.000 claims 2
- 239000004020 conductor Substances 0.000 claims 1
- 238000000605 extraction Methods 0.000 claims 1
- 230000005577 local transmission Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
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)
Abstract
내용 없음.
Description
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.
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 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) | ES8308178A1 (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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1186764A (en) * | 1982-06-23 | 1985-05-07 | Akira Kanemasa | Echo canceler |
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)
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 |
CA1173128A (en) * | 1981-10-13 | 1984-08-21 | Pok F. Lee | 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 IT IT24026/82A patent/IT1153339B/it active
- 1982-11-02 US US06/514,824 patent/US4571719A/en not_active Expired - Lifetime
- 1982-11-02 EP EP82903351A patent/EP0092569B1/en not_active Expired
- 1982-11-02 DE DE8282903351T patent/DE3261072D1/de not_active Expired
- 1982-11-02 WO PCT/SE1982/000362 patent/WO1983001715A1/en active IP Right Grant
- 1982-11-02 AU AU91221/82A patent/AU553371B2/en not_active Ceased
- 1982-11-02 KR KR8204930A patent/KR870000629B1/ko active
- 1982-11-02 BR BR8207952A patent/BR8207952A/pt not_active IP Right Cessation
- 1982-11-02 JP JP82503354A patent/JPS58501849A/ja active Pending
-
1983
- 1983-06-17 FI FI832229A patent/FI73104C/sv not_active IP Right Cessation
- 1983-06-30 DK DK301783A patent/DK301783A/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 |
---|---|
BR8207952A (pt) | 1983-10-04 |
JPS58501849A (ja) | 1983-10-27 |
FI832229L (fi) | 1983-06-17 |
AU9122182A (en) | 1983-05-18 |
DK301783D0 (da) | 1983-06-30 |
MX152128A (es) | 1985-05-30 |
MY100485A (en) | 1985-12-31 |
SE426765B (sv) | 1983-02-07 |
YU244382A (en) | 1985-03-20 |
IE53760B1 (en) | 1989-02-01 |
KR870000629B1 (ko) | 1987-03-26 |
FI73104B (fi) | 1987-04-30 |
FI73104C (sv) | 1987-08-10 |
DK301783A (da) | 1983-06-30 |
ES516966A0 (es) | 1983-08-01 |
US4571719A (en) | 1986-02-18 |
NO157239C (no) | 1988-02-10 |
EP0092569A1 (en) | 1983-11-02 |
ES8308178A1 (es) | 1983-08-01 |
WO1983001715A1 (en) | 1983-05-11 |
FI832229A0 (fi) | 1983-06-17 |
IT1153339B (it) | 1987-01-14 |
NO157239B (no) | 1987-11-02 |
AU553371B2 (en) | 1986-07-10 |
IE822606L (en) | 1983-05-02 |
NO832421L (no) | 1983-07-01 |
DE3261072D1 (en) | 1984-11-29 |
IT8224026A0 (it) | 1982-11-02 |
EP0092569B1 (en) | 1984-10-24 |
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