SE441720C - Duplexoverforing med en kompensationskrets for undertryckning av den del av mottagningssignalen som henfores till egen utsend signal - Google Patents

Duplexoverforing med en kompensationskrets for undertryckning av den del av mottagningssignalen som henfores till egen utsend signal

Info

Publication number: SE441720C
Authority: SE; Sweden
Prior art keywords: huk; compensation circuit; memory unit; memory; unit
Prior art date: 1977-10-24

Application number

SE7810979A

Other languages

English (en)

Swedish (sv)

Other versions

SE7810979L (sv

SE441720B (sv

Inventor

H E Bjor

B H Raad

Original Assignee

Elektrisk Bureau As

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.)

1977-10-24

Filing date

1978-10-20

Publication date

1987-11-09

1978-10-20 Application filed by Elektrisk Bureau As filed Critical Elektrisk Bureau As

1979-04-25 Publication of SE7810979L publication Critical patent/SE7810979L/xx

1985-10-28 Publication of SE441720B publication Critical patent/SE441720B/sv

1987-11-09 Publication of SE441720C publication Critical patent/SE441720C/sv

Links

238000012546 transfer Methods 0.000 title description 2
230000000754 repressing effect Effects 0.000 title 1
238000012937 correction Methods 0.000 claims description 10
230000005540 biological transmission Effects 0.000 claims description 5
239000003990 capacitor Substances 0.000 claims description 5
230000000694 effects Effects 0.000 claims description 5
102100034033 Alpha-adducin Human genes 0.000 claims description 4
101000799076 Homo sapiens Alpha-adducin Proteins 0.000 claims description 4
101000629598 Rattus norvegicus Sterol regulatory element-binding protein 1 Proteins 0.000 claims description 4
239000000853 adhesive Substances 0.000 claims 1
238000012986 modification Methods 0.000 description 5
230000004048 modification Effects 0.000 description 5
230000006870 function Effects 0.000 description 3
230000004044 response Effects 0.000 description 3
230000008859 change Effects 0.000 description 2
238000000034 method Methods 0.000 description 2
238000005070 sampling Methods 0.000 description 2
230000009471 action Effects 0.000 description 1
238000006243 chemical reaction Methods 0.000 description 1
230000008878 coupling Effects 0.000 description 1
238000010168 coupling process Methods 0.000 description 1
238000005859 coupling reaction Methods 0.000 description 1
230000001419 dependent effect Effects 0.000 description 1
238000010586 diagram Methods 0.000 description 1
230000010354 integration Effects 0.000 description 1
238000005259 measurement Methods 0.000 description 1
238000012856 packing Methods 0.000 description 1
238000012545 processing Methods 0.000 description 1
230000001360 synchronised effect Effects 0.000 description 1
230000009897 systematic effect 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
- H04B3/231—Echo cancellers using readout of a memory to provide the echo replica

Landscapes

Engineering & Computer Science (AREA)
Computer Networks & Wireless Communication (AREA)
Signal Processing (AREA)
Analogue/Digital Conversion (AREA)
Radar Systems Or Details Thereof (AREA)
Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Compression, Expansion, Code Conversion, And Decoders (AREA)
Bidirectional Digital Transmission (AREA)
Transceivers (AREA)
Dc Digital Transmission (AREA)

SE7810979A 1977-10-24 1978-10-20 Duplexoverforing med en kompensationskrets for undertryckning av den del av mottagningssignalen som henfores till egen utsend signal SE441720C (sv)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
NO773627A NO140648C (no)	1977-10-24	1977-10-24	Direktiv kobler.

Publications (3)

Publication Number	Publication Date
SE7810979L SE7810979L (sv)	1979-04-25
SE441720B SE441720B (sv)	1985-10-28
SE441720C true SE441720C (sv)	1987-11-09

Family

ID=19883789

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
SE7810979A SE441720C (sv)	1977-10-24	1978-10-20	Duplexoverforing med en kompensationskrets for undertryckning av den del av mottagningssignalen som henfores till egen utsend signal

Country Status (14)

Country	Link
US (1)	US4237463A (pt)
AR (1)	AR217116A1 (pt)
BR (1)	BR7807005A (pt)
DE (1)	DE2846105C2 (pt)
DK (1)	DK147564C (pt)
ES (1)	ES474858A1 (pt)
FI (1)	FI73552C (pt)
GB (1)	GB2007946B (pt)
GR (1)	GR65007B (pt)
IN (1)	IN149319B (pt)
MY (1)	MY8300052A (pt)
NL (1)	NL185968C (pt)
NO (1)	NO140648C (pt)
SE (1)	SE441720C (pt)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE2920575C2 (de) *	1979-05-21	1981-09-17	Siemens AG, 1000 Berlin und 8000 München	Digital-Fernmeldesystem mit mindestens einem Vierdrahtleitungsabschnitt
GB2083977B (en) *	1980-08-26	1984-08-22	Standard Telephones Cables Ltd	Single channel duplex radio system
IT1144154B (it) *	1981-03-09	1986-10-29	Cselt Centro Studi Lab Telecom	Sistema di trasmissione simultanea bidirezionale su linea a due conduttori per telefono numerico
DE3116863C2 (de) *	1981-04-28	1985-08-08	Siemens AG, 1000 Berlin und 8000 München	Schaltungsanordnung zur Digitalsignal-Echokompensation
DE3121545C2 (de) *	1981-05-29	1986-12-04	Siemens AG, 1000 Berlin und 8000 München	Übersprech- u./o. Echo-Kompensationsschaltung
GB2123259A (en) *	1982-06-25	1984-01-25	Philips Electronic Associated	Digital duplex communication system
GB8427165D0 (en) *	1984-10-26	1984-12-05	British Telecomm	Adaptive recognising device
US4638473A (en) *	1984-12-28	1987-01-20	Gte Laboratories Incorporated	Two wire bidirectional digital transmission system
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.
NL8600815A (nl) *	1986-03-28	1987-10-16	At & T & Philips Telecomm	Inrichting voor het kompenseren van niet-lineaire vervorming in een te digitaliseren ingangssignaal en een echokompensatiestelsel voorzien van een dergelijke inrichting.
SE453627B (sv) *	1986-06-17	1988-02-15	Ellemtel Utvecklings Ab	Anordning for adaptiv ekoeliminering
NO875147L (no) *	1987-05-12	1988-11-14	Elektrisk Bureau As	Fremgangsmaate for konvertering av signalnivaaer, samt anordning for utfoerelse av fremgangsmaaten.
GB8719307D0 (en) *	1987-08-14	1987-09-23	Gen Electric Co Plc	Echo canceller
US5719856A (en) *	1995-04-07	1998-02-17	Motorola, Inc.	Transmitter/receiver interface apparatus and method for a bi-directional transmission path
US5887032A (en) *	1996-09-03	1999-03-23	Amati Communications Corp.	Method and apparatus for crosstalk cancellation
US6901070B2 (en) *	2000-12-04	2005-05-31	Gautam Nag Kavipurapu	Dynamically programmable integrated switching device using an asymmetric 5T1C cell
US11862194B1 (en)	2022-12-01	2024-01-02	International Business Machines Corporation	Adaptive data detection on a nonlinear channel

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3535473A (en) *	1966-10-31	1970-10-20	Bell Telephone Labor Inc	Self-adjusting echo canceller
US3566031A (en) *	1968-12-23	1971-02-23	Bell Telephone Labor Inc	Direct-current data set arranged for polar signaling and full duplex operation
US3696429A (en) *	1971-05-24	1972-10-03	Cutler Hammer Inc	Signal cancellation system
US3821494A (en) *	1972-07-14	1974-06-28	Ibm	Digital echo suppressor with direct table look up control by delta coded signals
US4144417A (en) *	1975-03-07	1979-03-13	Kokusai Denshin Denwa Kabushiki Kaisha	Echo cancelling system
US4126770A (en) *	1975-11-07	1978-11-21	Kokusai Denshin Denwa Kabushiki Kaisha	Echo canceller
US4087654A (en) *	1975-11-28	1978-05-02	Bell Telephone Laboratories, Incorporated	Echo canceller for two-wire full duplex data transmission

1977
- 1977-10-24 NO NO773627A patent/NO140648C/no unknown
1978
- 1978-10-17 IN IN766/DEL/78A patent/IN149319B/en unknown
- 1978-10-20 FI FI783206A patent/FI73552C/fi not_active IP Right Cessation
- 1978-10-20 SE SE7810979A patent/SE441720C/sv not_active IP Right Cessation
- 1978-10-20 US US05/952,984 patent/US4237463A/en not_active Expired - Lifetime
- 1978-10-23 DE DE2846105A patent/DE2846105C2/de not_active Expired
- 1978-10-23 ES ES474858A patent/ES474858A1/es not_active Expired
- 1978-10-23 DK DK471078A patent/DK147564C/da not_active IP Right Cessation
- 1978-10-23 NL NLAANVRAGE7810554,A patent/NL185968C/xx not_active IP Right Cessation
- 1978-10-23 AR AR274187A patent/AR217116A1/es active
- 1978-10-24 BR BR7807005A patent/BR7807005A/pt unknown
- 1978-10-24 GR GR57494A patent/GR65007B/el unknown
- 1978-10-24 GB GB7841742A patent/GB2007946B/en not_active Expired
1983
- 1983-12-30 MY MY52/83A patent/MY8300052A/xx unknown

Also Published As

Publication number	Publication date
ES474858A1 (es)	1979-03-16
NL7810554A (nl)	1979-04-26
SE7810979L (sv)	1979-04-25
SE441720B (sv)	1985-10-28
DK147564B (da)	1984-10-01
AR217116A1 (es)	1980-02-29
GR65007B (en)	1980-06-12
NO140648C (no)	1983-03-29
NO773627L (no)	1979-04-25
FI783206A (fi)	1979-04-25
DK471078A (da)	1979-04-25
GB2007946A (en)	1979-05-23
DE2846105A1 (de)	1979-04-26
US4237463A (en)	1980-12-02
NL185968B (nl)	1990-03-16
DK147564C (da)	1989-10-23
DE2846105C2 (de)	1985-03-21
FI73552C (fi)	1987-10-09
MY8300052A (en)	1983-12-31
BR7807005A (pt)	1979-05-08
FI73552B (fi)	1987-06-30
IN149319B (pt)	1981-10-24
NL185968C (nl)	1990-08-16
GB2007946B (en)	1982-03-24
NO140648B (no)	1979-07-02

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1995-01-31

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1999-01-18

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