JPS5647136A - Automatic equalizer - Google Patents

Automatic equalizer

Info

Publication number
JPS5647136A
JPS5647136A JP12357679A JP12357679A JPS5647136A JP S5647136 A JPS5647136 A JP S5647136A JP 12357679 A JP12357679 A JP 12357679A JP 12357679 A JP12357679 A JP 12357679A JP S5647136 A JPS5647136 A JP S5647136A
Authority
JP
Japan
Prior art keywords
equalizer
error
automatic
signal
discrimination
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
JP12357679A
Other languages
Japanese (ja)
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 JP12357679A priority Critical patent/JPS5647136A/en
Publication of JPS5647136A publication Critical patent/JPS5647136A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/24—Testing correct operation
    • H04L1/245—Testing correct operation by using the properties of transmission codes
    • H04L1/247—Testing correct operation by using the properties of transmission codes three-level transmission codes, e.g. ternary

Landscapes

  • Engineering & Computer Science (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 widen sufficiently the acquisition range of automatic equalization by providing an error correcting method that makes use of the regularity of a bipolar code. CONSTITUTION:A received signal from terminal 1 is inputted to automatic equalizer 2 and an equalized output signal is discriminated by threshold detecting circuit 3, which outputs a discrimination signal, consisting of three levels corresponding to [1], [0] and [-1], to comparing-correcting circuit 4. Comparing-correcting circuit 4 detects and corrects an error of the discrimination signal by making use of the regularity of the bipolar code to output a corrected discrimination signal. Then, the corrected discrimination signal and equalized output signal are inputted to automatic-equalizer correcting circuit 5, which suppies a corrected variable gain to automatic equalizer 2. Consequently, no error gain adjustment is made even if a discrimination error is generated while the equalizer does not provide sufficient equalization, so that stable acquisition operation will be performed.
JP12357679A 1979-09-26 1979-09-26 Automatic equalizer Pending JPS5647136A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12357679A JPS5647136A (en) 1979-09-26 1979-09-26 Automatic equalizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12357679A JPS5647136A (en) 1979-09-26 1979-09-26 Automatic equalizer

Publications (1)

Publication Number Publication Date
JPS5647136A true JPS5647136A (en) 1981-04-28

Family

ID=14863994

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12357679A Pending JPS5647136A (en) 1979-09-26 1979-09-26 Automatic equalizer

Country Status (1)

Country Link
JP (1) JPS5647136A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54158804A (en) * 1978-06-06 1979-12-15 Nippon Telegr & Teleph Corp <Ntt> Automatic bipolar equalization system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54158804A (en) * 1978-06-06 1979-12-15 Nippon Telegr & Teleph Corp <Ntt> Automatic bipolar equalization system

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