NO822531L - System for digital basisbaandtransmisjon i begge retningene til en to-traadsledning - Google Patents
System for digital basisbaandtransmisjon i begge retningene til en to-traadsledningInfo
- Publication number
- NO822531L NO822531L NO82822531A NO822531A NO822531L NO 822531 L NO822531 L NO 822531L NO 82822531 A NO82822531 A NO 82822531A NO 822531 A NO822531 A NO 822531A NO 822531 L NO822531 L NO 822531L
- Authority
- NO
- Norway
- Prior art keywords
- line
- directions
- wire
- transmission system
- base transmission
- Prior art date
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
- H04B3/235—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 combined with adaptive equaliser
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
- H04L5/1423—Two-way operation using the same type of signal, i.e. duplex for simultaneous baseband signals
-
- 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)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Bidirectional Digital Transmission (AREA)
- Transmitters (AREA)
Abstract
Systemet skal bli anvendt på digital basisbåndtransmisjon i begge retninger. på en totrådsledning og nærmere bestemt på en abonnentlinje (3). Denne be-. virker annullering av ekkoet, på grunn av signalet sendt av en dataterminal,. fra signalet mottatt ved selve terminalen, slik at informasjon og tidssignaler kan bli gjenvunnet. En fast linjeutjevning, konstruert for en hovedsambands-linjelengde, og en krets (CE) som annullerer støyen ved en korrelasjon mellom mottatte og sendte signaler blir benyttet. Den statistiske uavhengigheten j mellom den digitale strømmen i begge retninger blir tilveiebrakt ved bruk av en. linjekode av binærtypen.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT8168023A IT1144423B (it) | 1981-07-23 | 1981-07-23 | Sistema per la trasmissione numerica bidirezionale in banda su linea a due fili |
Publications (1)
Publication Number | Publication Date |
---|---|
NO822531L true NO822531L (no) | 1983-01-24 |
Family
ID=11307265
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO82822531A NO822531L (no) | 1981-07-23 | 1982-07-22 | System for digital basisbaandtransmisjon i begge retningene til en to-traadsledning |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0071192A1 (no) |
JP (1) | JPS5859643A (no) |
IT (1) | IT1144423B (no) |
NO (1) | NO822531L (no) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1184949B (it) * | 1985-05-14 | 1987-10-28 | Sip | Perfezionamento ai sistemi per la trasmissione numerica bidirezionale con cancellazione d eco |
GB8616873D0 (en) * | 1986-07-10 | 1986-08-20 | British Telecomm | Optical telecommunications system |
EP0378695B1 (en) * | 1988-06-17 | 1994-12-07 | Fujitsu Limited | An initial training apparatus for use in a transmitter and receiver apparatus |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE416367B (sv) * | 1976-09-07 | 1980-12-15 | Western Electric Co | Ekoelimineringsanordning |
GB2041702A (en) * | 1979-02-01 | 1980-09-10 | Standard Telephones Cables Ltd | Digital transmission systems |
-
1981
- 1981-07-23 IT IT8168023A patent/IT1144423B/it active
-
1982
- 1982-07-16 JP JP57123036A patent/JPS5859643A/ja active Granted
- 1982-07-22 NO NO82822531A patent/NO822531L/no unknown
- 1982-07-22 EP EP82106619A patent/EP0071192A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
JPS5859643A (ja) | 1983-04-08 |
EP0071192A1 (en) | 1983-02-09 |
IT8168023A0 (it) | 1981-07-23 |
JPH039656B2 (no) | 1991-02-08 |
IT1144423B (it) | 1986-10-29 |
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