JPS5654131A - Automatic equalizer - Google Patents

Automatic equalizer

Info

Publication number
JPS5654131A
JPS5654131A JP13101379A JP13101379A JPS5654131A JP S5654131 A JPS5654131 A JP S5654131A JP 13101379 A JP13101379 A JP 13101379A JP 13101379 A JP13101379 A JP 13101379A JP S5654131 A JPS5654131 A JP S5654131A
Authority
JP
Japan
Prior art keywords
signal
output
identifying
circuits
accumulator
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
JP13101379A
Other languages
Japanese (ja)
Other versions
JPS6316931B2 (en
Inventor
Fumio Akashi
Toru Koyama
Masaru Yamaguchi
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 JP13101379A priority Critical patent/JPS5654131A/en
Publication of JPS5654131A publication Critical patent/JPS5654131A/en
Publication of JPS6316931B2 publication Critical patent/JPS6316931B2/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
    • H04L25/03057—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception with a recursive structure

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 enable equalization wide in drawing-in range, by combining the first adjusting means using reception signals and the second adjusting means using identifying signals. CONSTITUTION:The reception signal 1 is converted into an identifying signal 4 via an accumulator 2 and a threshold value circuit 3. Further, the signal 1 is fed to integrators 11, 12 via delay elements 24, 25 and multipliers 9, 10 to obtain the self- correlation at the output. The signal 4 is subtracted from the accumulator 2 at a subtractor 15 to obtain an error signal. This error signal is added with the output of variable gain hold circuits 22, 23 at adders 21, 22 and is input to switching circuits 13, 14. The output of the circuits 13, 14 feeds the adjusted tap gain adjusted via tap gain hold circuits 22, 23 to a variable equalizer. Further, with the combination of rough control by a correlator and accurate control by the identifying signal, the equalization wide in drawing-range and high in the accuracy can be made.
JP13101379A 1979-10-11 1979-10-11 Automatic equalizer Granted JPS5654131A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13101379A JPS5654131A (en) 1979-10-11 1979-10-11 Automatic equalizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13101379A JPS5654131A (en) 1979-10-11 1979-10-11 Automatic equalizer

Publications (2)

Publication Number Publication Date
JPS5654131A true JPS5654131A (en) 1981-05-14
JPS6316931B2 JPS6316931B2 (en) 1988-04-12

Family

ID=15047936

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13101379A Granted JPS5654131A (en) 1979-10-11 1979-10-11 Automatic equalizer

Country Status (1)

Country Link
JP (1) JPS5654131A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2422989A (en) * 2005-02-03 2006-08-09 Agilent Technologies Inc Correlating a received data signal with a time delayed version of the signal to obtain a measurement of inter-symbol interference

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2422989A (en) * 2005-02-03 2006-08-09 Agilent Technologies Inc Correlating a received data signal with a time delayed version of the signal to obtain a measurement of inter-symbol interference

Also Published As

Publication number Publication date
JPS6316931B2 (en) 1988-04-12

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