JPS5799815A - Automatic equalizer - Google Patents

Automatic equalizer

Info

Publication number
JPS5799815A
JPS5799815A JP17688580A JP17688580A JPS5799815A JP S5799815 A JPS5799815 A JP S5799815A JP 17688580 A JP17688580 A JP 17688580A JP 17688580 A JP17688580 A JP 17688580A JP S5799815 A JPS5799815 A JP S5799815A
Authority
JP
Japan
Prior art keywords
circuit
value
logical
automatic equalizer
output
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.)
Pending
Application number
JP17688580A
Other languages
Japanese (ja)
Inventor
Mikiro Eguchi
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
Original Assignee
NEC 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 Electric Co Ltd filed Critical NEC Corp
Priority to JP17688580A priority Critical patent/JPS5799815A/en
Publication of JPS5799815A publication Critical patent/JPS5799815A/en
Pending 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
    • H04L25/03038—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception with a non-recursive structure

Landscapes

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

Abstract

PURPOSE:To prevent overcorrection of an automatic equalizer or divergence of the system even if an impulse noise occurs in the transmission line, by inhibiting the correction of the automatic equalizer for a constant time when the average value of the amplitude of receiving data exceeds a constant value. CONSTITUTION:Receiving data RD is given to an averaging circuit 7; and if receiving data having an abnormally large amplitude is given to the circuit 7, a large value appears in the output. The output of the circuit 7 is inputted to a discriminating circuit 8 and is compared with a predetermined constant value. When the average value exceeds the constant value as the result of the comparison, the circuit 8 outputs logical 1 to a timer circuit 9. When receiving the output of logical 1 of the circuit 8, the circuit 9 transmits logical 0 for a constant time. A gate circuit 10 is closed for the time of logical 0 to prevent the excessive error quantity from a discriminator 6 from being inputted to an adder 7. Thus, correction of the automatic equalizer is inhibited to hold the correction quantity, which is stored in a register 2, in the value just before abnormality.
JP17688580A 1980-12-15 1980-12-15 Automatic equalizer Pending JPS5799815A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17688580A JPS5799815A (en) 1980-12-15 1980-12-15 Automatic equalizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17688580A JPS5799815A (en) 1980-12-15 1980-12-15 Automatic equalizer

Publications (1)

Publication Number Publication Date
JPS5799815A true JPS5799815A (en) 1982-06-21

Family

ID=16021459

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17688580A Pending JPS5799815A (en) 1980-12-15 1980-12-15 Automatic equalizer

Country Status (1)

Country Link
JP (1) JPS5799815A (en)

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