JPS5552646A - Odd multilevel adaptive automatic equalizer - Google Patents

Odd multilevel adaptive automatic equalizer

Info

Publication number
JPS5552646A
JPS5552646A JP12655278A JP12655278A JPS5552646A JP S5552646 A JPS5552646 A JP S5552646A JP 12655278 A JP12655278 A JP 12655278A JP 12655278 A JP12655278 A JP 12655278A JP S5552646 A JPS5552646 A JP S5552646A
Authority
JP
Japan
Prior art keywords
signal
odd
multilevel
circuit
reversible counter
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
JP12655278A
Other languages
Japanese (ja)
Inventor
Takuya Iwagami
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 JP12655278A priority Critical patent/JPS5552646A/en
Publication of JPS5552646A publication Critical patent/JPS5552646A/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

Landscapes

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

Abstract

PURPOSE:To obtain an odd multilevel transmission automatic equalizer which does not cause reduction of a lead-in range, lowering of a convergence speed, etc., by not using error signals at a time, when the decision result of an odd multilevel discrimination circuit indicates a center value, as control signals. CONSTITUTION:The weight coefficient of each tap of transversal filter 201 is corrected by reversible counter 214. Odd multilevel discrimination circuit 202 receives output 203 of filter 201 and outputs multilevel decision signal 205, output polarity signal 205 an difference between signals 203 and 205, namely, error signal 207. Signal 207 is inputted to shift register 209 and controls reversible counter 214 through exclusive OR circuit 211 together with signal which passed through delay circuit 210. Center value discrimination signal 215 outputted from circuit 202 stops the control of reversible counter 214 through delay circuit 208 and gate 216.
JP12655278A 1978-10-13 1978-10-13 Odd multilevel adaptive automatic equalizer Pending JPS5552646A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12655278A JPS5552646A (en) 1978-10-13 1978-10-13 Odd multilevel adaptive automatic equalizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12655278A JPS5552646A (en) 1978-10-13 1978-10-13 Odd multilevel adaptive automatic equalizer

Publications (1)

Publication Number Publication Date
JPS5552646A true JPS5552646A (en) 1980-04-17

Family

ID=14937988

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12655278A Pending JPS5552646A (en) 1978-10-13 1978-10-13 Odd multilevel adaptive automatic equalizer

Country Status (1)

Country Link
JP (1) JPS5552646A (en)

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