JPS57159136A - Data transmission system - Google Patents

Data transmission system

Info

Publication number
JPS57159136A
JPS57159136A JP4452781A JP4452781A JPS57159136A JP S57159136 A JPS57159136 A JP S57159136A JP 4452781 A JP4452781 A JP 4452781A JP 4452781 A JP4452781 A JP 4452781A JP S57159136 A JPS57159136 A JP S57159136A
Authority
JP
Japan
Prior art keywords
signal
error correction
output
error
automatic equalizer
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
JP4452781A
Other languages
Japanese (ja)
Inventor
Koji Aoki
Hiroshi Yamada
Koji Ikuta
Naoki Watanabe
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP4452781A priority Critical patent/JPS57159136A/en
Publication of JPS57159136A publication Critical patent/JPS57159136A/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)
  • Dc Digital Transmission (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To achieve data transmission even with large transmission distortion, by comparing an input and an output of an error correction decoder and controllling an automatic equalizer according to the result. CONSTITUTION:A tranmission section converts a digital signal into an octal signal for output. At a reception section, a signal at a transmision band only is applied to a demodulator DEM with a band pass filter RBPH for demodulation. A base band signal in the demodulation signal is applied to an automatic equalizer. The equalized output is applied to an AD converter ACD to to convert the octal signal into 4 bits. The least significant bit is set to an error bit and other 3 bits is applied to error correction decoders DEC1-DEC3. The error correction decoders correct the transmission error by using the error correction code included in each grame. The comparison circuit COMP corrects the error bit from the AD converter ADC and apply the result to the automatic equalizer AEQ from the difference between the input and output of the error correction decoder.
JP4452781A 1981-03-26 1981-03-26 Data transmission system Pending JPS57159136A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4452781A JPS57159136A (en) 1981-03-26 1981-03-26 Data transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4452781A JPS57159136A (en) 1981-03-26 1981-03-26 Data transmission system

Publications (1)

Publication Number Publication Date
JPS57159136A true JPS57159136A (en) 1982-10-01

Family

ID=12693983

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4452781A Pending JPS57159136A (en) 1981-03-26 1981-03-26 Data transmission system

Country Status (1)

Country Link
JP (1) JPS57159136A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62214736A (en) * 1986-03-14 1987-09-21 Nec Corp Equalizer
JPS62242425A (en) * 1986-04-15 1987-10-23 Nec Corp Equalizer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62214736A (en) * 1986-03-14 1987-09-21 Nec Corp Equalizer
JPS62242425A (en) * 1986-04-15 1987-10-23 Nec Corp Equalizer

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