JPS57142040A - Variable equalizing system - Google Patents

Variable equalizing system

Info

Publication number
JPS57142040A
JPS57142040A JP2777181A JP2777181A JPS57142040A JP S57142040 A JPS57142040 A JP S57142040A JP 2777181 A JP2777181 A JP 2777181A JP 2777181 A JP2777181 A JP 2777181A JP S57142040 A JPS57142040 A JP S57142040A
Authority
JP
Japan
Prior art keywords
codes
circuit
gain
interference
amount
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.)
Granted
Application number
JP2777181A
Other languages
Japanese (ja)
Other versions
JPS6411172B2 (en
Inventor
Masanori Arai
Koji Nishizaki
Tadao Ogawa
Masami Mizuguchi
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP2777181A priority Critical patent/JPS57142040A/en
Publication of JPS57142040A publication Critical patent/JPS57142040A/en
Publication of JPS6411172B2 publication Critical patent/JPS6411172B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
    • H04L25/03019—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception

Abstract

PURPOSE:To equalize the loss of a transmission cable to low frequencies with high accuracy and to reduce the error in discrimination of a reception signal, by changing the gain of a flat amplifier or an equalizer based on the amount of interference between codes and the amplitude of an input and output signal. CONSTITUTION:An input signal is given to an AGC controlling circuit 2 via a f1/2AGC1, a waveform shaping circuit 11 and a flat amplifier 4 for automatic equalization. Interference between codes 9 and 10 at a time T2 on time slot after the center of a pulse of equalization waveform are detected at a detection circuit between codes 3 and the gain of the flat amplifier 4 is controlled with a control circuit 5 depending on the amount of detection.
JP2777181A 1981-02-27 1981-02-27 Variable equalizing system Granted JPS57142040A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2777181A JPS57142040A (en) 1981-02-27 1981-02-27 Variable equalizing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2777181A JPS57142040A (en) 1981-02-27 1981-02-27 Variable equalizing system

Publications (2)

Publication Number Publication Date
JPS57142040A true JPS57142040A (en) 1982-09-02
JPS6411172B2 JPS6411172B2 (en) 1989-02-23

Family

ID=12230236

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2777181A Granted JPS57142040A (en) 1981-02-27 1981-02-27 Variable equalizing system

Country Status (1)

Country Link
JP (1) JPS57142040A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57197935A (en) * 1981-05-29 1982-12-04 Nec Corp Line equalizer
JPS62274936A (en) * 1986-05-23 1987-11-28 Meidensha Electric Mfg Co Ltd Waveform reproducing circuit for transmission signal
FR2602383A1 (en) * 1986-08-04 1988-02-05 Simon Jean Louis Autoadaptive equaliser for heterogeneous sections of line
FR2665808A1 (en) * 1990-08-10 1992-02-14 Thomson Csf Auto-adaptive equaliser

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53137614A (en) * 1977-05-09 1978-12-01 Nippon Telegr & Teleph Corp <Ntt> Automatic equalizing system for data delivery

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53137614A (en) * 1977-05-09 1978-12-01 Nippon Telegr & Teleph Corp <Ntt> Automatic equalizing system for data delivery

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57197935A (en) * 1981-05-29 1982-12-04 Nec Corp Line equalizer
JPS62274936A (en) * 1986-05-23 1987-11-28 Meidensha Electric Mfg Co Ltd Waveform reproducing circuit for transmission signal
FR2602383A1 (en) * 1986-08-04 1988-02-05 Simon Jean Louis Autoadaptive equaliser for heterogeneous sections of line
FR2665808A1 (en) * 1990-08-10 1992-02-14 Thomson Csf Auto-adaptive equaliser

Also Published As

Publication number Publication date
JPS6411172B2 (en) 1989-02-23

Similar Documents

Publication Publication Date Title
GB1411668A (en) Automatic equalizers
JPS57142040A (en) Variable equalizing system
EP0203757A3 (en) Digital transmission system using an auxiliary low-frequency channel
EP0388895A3 (en) Variable transmission power type transmitter
JPS53147409A (en) Gain control system with variable sampling frequency
JPS56111331A (en) Two-dimentionally applied type automatic equalizer
JPS5469005A (en) Automatic gain adjusting circuit
JPS5564447A (en) Digital signal transmission system
JPS54132153A (en) Automatic equalizer circuit
JPS5769915A (en) Automatic gain control circuit
JPS57166722A (en) Automatic equalizer
JPS5690634A (en) Automatic equalization system of photodetector
JPS5675731A (en) Automatic equalizer
JPS5634155A (en) Automatic recording system
JPS5628551A (en) Carrier frequency multiplex terminal station adding unit
JPS57154950A (en) Compensating system for inter-code interference
JPS5772446A (en) Multibranch connection system
JPS56136055A (en) Agc system of time-division multidirectional communication
JPS56156029A (en) Ssb multidirectional multiplex communication device
JPS53116057A (en) Automatic cain control system
JPS57210733A (en) Receiver
JPS57188163A (en) Signal discriminator
JPS573409A (en) Agc circuit
JPS57159155A (en) Photo reception module
JPS5614967A (en) Automatic gain control circuit of radar receiver