JPS5684020A - Automatic equalizer - Google Patents

Automatic equalizer

Info

Publication number
JPS5684020A
JPS5684020A JP16195479A JP16195479A JPS5684020A JP S5684020 A JPS5684020 A JP S5684020A JP 16195479 A JP16195479 A JP 16195479A JP 16195479 A JP16195479 A JP 16195479A JP S5684020 A JPS5684020 A JP S5684020A
Authority
JP
Japan
Prior art keywords
impulse response
delayed
correlation
circuits
basis
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
JP16195479A
Other languages
Japanese (ja)
Inventor
Masaru Yamaguchi
Toru Koyama
Fumio Akashi
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 JP16195479A priority Critical patent/JPS5684020A/en
Publication of JPS5684020A publication Critical patent/JPS5684020A/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)
  • Filters That Use Time-Delay Elements (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To eliminate code-to-code interference by laying emphasis by detecting the correlation of impulse response at an adequate frequency in the base band. CONSTITUTION:A signal having the output level flattened by variable gain circuit 2 is delayed by delay circuits 61-6N by times tau1-tauN. Then, correlations between those delayed signals and the original signal are detected. On the basis of those correlation results, emphasizing circuits 91-9N whose center frequencies have been determined according to the delay times are automatically controlled. Next, gains of emphasizing circuits are controlled on the basis of the theory that when transmitted data arrive at random, the correlation between one impulse response and impulse response delayed by time (tau) is constant.
JP16195479A 1979-12-13 1979-12-13 Automatic equalizer Pending JPS5684020A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16195479A JPS5684020A (en) 1979-12-13 1979-12-13 Automatic equalizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16195479A JPS5684020A (en) 1979-12-13 1979-12-13 Automatic equalizer

Publications (1)

Publication Number Publication Date
JPS5684020A true JPS5684020A (en) 1981-07-09

Family

ID=15745206

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16195479A Pending JPS5684020A (en) 1979-12-13 1979-12-13 Automatic equalizer

Country Status (1)

Country Link
JP (1) JPS5684020A (en)

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