JPH039656B2 - - Google Patents

Info

Publication number
JPH039656B2
JPH039656B2 JP57123036A JP12303682A JPH039656B2 JP H039656 B2 JPH039656 B2 JP H039656B2 JP 57123036 A JP57123036 A JP 57123036A JP 12303682 A JP12303682 A JP 12303682A JP H039656 B2 JPH039656 B2 JP H039656B2
Authority
JP
Japan
Prior art keywords
signal
circuit
line
output
digital
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
JP57123036A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5859643A (ja
Inventor
Panarotsuto Janfuranko
Tofuaneri Adoreru
Baretsuto Ruiji
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHITSUPU SOC ITARIAANA PERU RESERUCHITSUIO TEREFUONIKO PII AA
Original Assignee
SHITSUPU SOC ITARIAANA PERU RESERUCHITSUIO TEREFUONIKO PII AA
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 SHITSUPU SOC ITARIAANA PERU RESERUCHITSUIO TEREFUONIKO PII AA filed Critical SHITSUPU SOC ITARIAANA PERU RESERUCHITSUIO TEREFUONIKO PII AA
Publication of JPS5859643A publication Critical patent/JPS5859643A/ja
Publication of JPH039656B2 publication Critical patent/JPH039656B2/ja
Granted legal-status Critical Current

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)
JP57123036A 1981-07-16 1982-07-16 ２線式ワイヤ・ライン上で両方向のベ−スバンド・デイジタル送信方式 Granted JPS5859643A (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT68023-A/81 1981-07-16
IT8168023A IT1144423B (it) 1981-07-23 1981-07-23 Sistema per la trasmissione numerica bidirezionale in banda su linea a due fili

Publications (2)

Publication Number Publication Date
JPS5859643A JPS5859643A (ja) 1983-04-08
JPH039656B2 true JPH039656B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1991-02-08

Family

ID=11307265

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57123036A Granted JPS5859643A (ja) 1981-07-16 1982-07-16 ２線式ワイヤ・ライン上で両方向のベ−スバンド・デイジタル送信方式

Country Status (4)

Country Link
EP (1) EP0071192A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS5859643A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
IT (1) IT1144423B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NO (1) NO822531L (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
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
US5353305A (en) * 1988-06-17 1994-10-04 Fujitsu Limited Initial training apparatus for use in a transmitter and receiver apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
IT1144423B (it) 1986-10-29
IT8168023A0 (it) 1981-07-23
JPS5859643A (ja) 1983-04-08
EP0071192A1 (en) 1983-02-09
NO822531L (no) 1983-01-24

Similar Documents

Publication Publication Date Title
US3962637A (en) Ultrafast adaptive digital modem
USRE37826E1 (en) Ethernet system
US4351062A (en) Method and apparatus for suppressing digital error noise in digital communication
JPH07114403B2 (ja) データ伝送装置における同期維持方法
JPS5923497B2 (ja) エコ−キヤンセラ
JPS62204633A (ja) 送配電網の線路を介してのデ−タ伝送方法
US4734920A (en) High speed modem for multiple communication circuits
EP0145022B1 (en) Method and apparatus for cancelling echo
JPS5842665B2 (ja) エコ−・順方向一体等化装置
US5521949A (en) Synchronization scheme for digital communications systems transporting data at a customer-controlled rate
JPS58173937A (ja) 電話回線式デ−タ送信装置及び方法
JPS594336A (ja) 複合伝送システムに於けるタ−ミナル装置
US4398062A (en) Apparatus for privacy transmission in system having bandwidth constraint
US4334128A (en) Echo canceler for homochronous data transmission systems
US4769808A (en) Method of cancelling echoes in full-duplex data transmission system
US4686703A (en) System for bidirectional digital transmission with echo cancellation
US5297163A (en) Method for processing signals for signal transmission in the base band
EP0304081B1 (en) Digital communication system using partial response and bipolar coding techniques
US4539674A (en) Method of providing adaptive echo cancellation in transmission of digital information in duplex, and apparatus for performing the method
US4011405A (en) Digital data transmission systems
JPH039655B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
WO1989012359A1 (en) Signal processor
JPH039656B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
US6404357B1 (en) Digital/analogue communication system for increasing transfer efficiency of digital sample data
US5359656A (en) Adaptive echo cancellation apparatus