JPS56158538A - Automatic equalizer - Google Patents

Automatic equalizer

Info

Publication number
JPS56158538A
JPS56158538A JP6293680A JP6293680A JPS56158538A JP S56158538 A JPS56158538 A JP S56158538A JP 6293680 A JP6293680 A JP 6293680A JP 6293680 A JP6293680 A JP 6293680A JP S56158538 A JPS56158538 A JP S56158538A
Authority
JP
Japan
Prior art keywords
output
given
value
discriminator
subtractor
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
JP6293680A
Other languages
Japanese (ja)
Other versions
JPS614225B2 (en
Inventor
Kazutomo Kobayashi
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 JP6293680A priority Critical patent/JPS56158538A/en
Publication of JPS56158538A publication Critical patent/JPS56158538A/en
Publication of JPS614225B2 publication Critical patent/JPS614225B2/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
    • H04L25/03038—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)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Filters That Use Time-Delay Elements (AREA)

Abstract

PURPOSE:To obtain an automatic equalizer without offset, by extracting the difference of input and output of a discriminator which obtains the estimated value of a transmission signal by taking the output of an equalizer as the input, and subtracting a value integrating it from the output of the equalizer. CONSTITUTION:An input signal 1 is given to a tapped delay line 2, and a value picked up via multipliers 3-5 to weight the output of each tap is added at an adder 6. The output of the adder 6 is outputted via a subtractor 11 and a discriminator 12. The transmission data estimated at the discriminator 12 and the input to the discriminator are given to a subtractor 13 to extract the error component, the value is given to multipliers 22-24, this is multiplied with the output of each tap of the delay line 2, the result is fed to integrators 28-30 via attenuators 25- 27 respectively, and the output of the integrators is given to the multipliers 3-5. Further, the output of the subtractor 13 is given to the subtractor 11 for the offset value integrating at 15 it via an attenuator 14. Thus, the multipliers 3-5 controls the weight of each tap of the delay line 2 automatically so that the output error is made smaller, and output is made from the adder 6 by the subtraction of the offset value.
JP6293680A 1980-05-13 1980-05-13 Automatic equalizer Granted JPS56158538A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6293680A JPS56158538A (en) 1980-05-13 1980-05-13 Automatic equalizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6293680A JPS56158538A (en) 1980-05-13 1980-05-13 Automatic equalizer

Publications (2)

Publication Number Publication Date
JPS56158538A true JPS56158538A (en) 1981-12-07
JPS614225B2 JPS614225B2 (en) 1986-02-07

Family

ID=13214673

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6293680A Granted JPS56158538A (en) 1980-05-13 1980-05-13 Automatic equalizer

Country Status (1)

Country Link
JP (1) JPS56158538A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59115611A (en) * 1982-12-22 1984-07-04 Nec Corp Non-linear automatic equalizer
JPS59115612A (en) * 1982-12-22 1984-07-04 Nec Corp Non-linear automatic equalizer
US20190030979A1 (en) * 2016-03-30 2019-01-31 Nhk Spring Co., Ltd. Hollow spring member

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59115611A (en) * 1982-12-22 1984-07-04 Nec Corp Non-linear automatic equalizer
JPS59115612A (en) * 1982-12-22 1984-07-04 Nec Corp Non-linear automatic equalizer
US20190030979A1 (en) * 2016-03-30 2019-01-31 Nhk Spring Co., Ltd. Hollow spring member

Also Published As

Publication number Publication date
JPS614225B2 (en) 1986-02-07

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