JPS5484952A - Automatic equalizer - Google Patents

Automatic equalizer

Info

Publication number
JPS5484952A
JPS5484952A JP15338377A JP15338377A JPS5484952A JP S5484952 A JPS5484952 A JP S5484952A JP 15338377 A JP15338377 A JP 15338377A JP 15338377 A JP15338377 A JP 15338377A JP S5484952 A JPS5484952 A JP S5484952A
Authority
JP
Japan
Prior art keywords
circuit
output
interferrence
line
code
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
JP15338377A
Other languages
Japanese (ja)
Other versions
JPS592410B2 (en
Inventor
Masaharu Shimada
Tatsuo Fujita
Yoshiya Hidaka
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.)
NEC Corp
Nippon Telegraph and Telephone Corp
Original Assignee
NEC Corp
Nippon Telegraph and Telephone Corp
Nippon Electric Co 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 NEC Corp, Nippon Telegraph and Telephone Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP15338377A priority Critical patent/JPS592410B2/en
Publication of JPS5484952A publication Critical patent/JPS5484952A/en
Publication of JPS592410B2 publication Critical patent/JPS592410B2/en
Expired 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Networks Using Active Elements (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To correct the wave distortion due to line frequency loss performance, by performing line primary equlization with the output of the peak detection circuit, performing secondary line equalization with the output of the in-code interferrence detection circuit, and adding the function zeroing the in-code interferrence to the AGC circuit system. CONSTITUTION:In the atomatic equalizer compensating the wave distortion due to the line frequency loss characteristics, the variable equalizer 1 having the line approximate frequency characteristic gain opposite to the line frequency characteristics in advance is provided, and further, the filter 7 wave-shaping or band limiting and the peak detection circuit 2 detecting the peak value of the output waveform of the filter 7 are provided. The automatic equalizer is constituted with the clock pick up circuit 8 picking up the clock included in the input waveform component, interferrence amount detection circiut 9 detecting the in-code interferrence from the filter 7 with the clock of the circuit 8, peak value change identification circuit 10 judging the change in the output of the circuit 2, memory circuit 11 storing the output of the circut 10, and adder 13 adding the output of the circuit 11 and that of the circuit 2.
JP15338377A 1977-12-20 1977-12-20 automatic equalizer Expired JPS592410B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15338377A JPS592410B2 (en) 1977-12-20 1977-12-20 automatic equalizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15338377A JPS592410B2 (en) 1977-12-20 1977-12-20 automatic equalizer

Publications (2)

Publication Number Publication Date
JPS5484952A true JPS5484952A (en) 1979-07-06
JPS592410B2 JPS592410B2 (en) 1984-01-18

Family

ID=15561265

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15338377A Expired JPS592410B2 (en) 1977-12-20 1977-12-20 automatic equalizer

Country Status (1)

Country Link
JP (1) JPS592410B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58131812A (en) * 1982-02-01 1983-08-05 Yokogawa Hokushin Electric Corp Variable ramp burst filter device
JPS62143341U (en) * 1986-03-04 1987-09-10
JPS62143340U (en) * 1986-03-04 1987-09-10

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58131812A (en) * 1982-02-01 1983-08-05 Yokogawa Hokushin Electric Corp Variable ramp burst filter device
JPH0143488B2 (en) * 1982-02-01 1989-09-21 Yokogawa Electric Corp
JPS62143341U (en) * 1986-03-04 1987-09-10
JPS62143340U (en) * 1986-03-04 1987-09-10

Also Published As

Publication number Publication date
JPS592410B2 (en) 1984-01-18

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