JPS5586213A - Automatic equalizer - Google Patents

Automatic equalizer

Info

Publication number
JPS5586213A
JPS5586213A JP16383378A JP16383378A JPS5586213A JP S5586213 A JPS5586213 A JP S5586213A JP 16383378 A JP16383378 A JP 16383378A JP 16383378 A JP16383378 A JP 16383378A JP S5586213 A JPS5586213 A JP S5586213A
Authority
JP
Japan
Prior art keywords
decision
signal
circuit
soft
subtracter
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
JP16383378A
Other languages
Japanese (ja)
Other versions
JPS6256686B2 (en
Inventor
Yoichi Sato
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 JP16383378A priority Critical patent/JPS5586213A/en
Publication of JPS5586213A publication Critical patent/JPS5586213A/en
Publication of JPS6256686B2 publication Critical patent/JPS6256686B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H15/00—Transversal filters

Landscapes

  • Filters That Use Time-Delay Elements (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To enable a simple circuit to remove inter-code interference occurring on a transmission line by finding inter-code interference to be subtracted from a received signal by making use of soft-decision results of the received signal and corresponding tap gains. CONSTITUTION:One input signal is led to delay circuit 2-1, and the other to shift register 4-1 via soft-decision circuit 3. The product of a signal from tap gain memory circuit 5-1 and a soft-decision result from tape 6 is calculated by multiplier 7-1 and then inputted to subtracter 8 together with a signal from delay circuit 2-1. Next, hard-decision circuit 9 makes a decision upon its output and subtracter 10 finds a difference between the result and the signal from subtracter 8 to obtain the corrected value of a tap gain. Therefore, a signal inputted to a delay line can be substituted by the result of a soft decision on the input signal, so that while the circuit constitution is simplified, inter-code interference can be removed.
JP16383378A 1978-12-22 1978-12-22 Automatic equalizer Granted JPS5586213A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16383378A JPS5586213A (en) 1978-12-22 1978-12-22 Automatic equalizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16383378A JPS5586213A (en) 1978-12-22 1978-12-22 Automatic equalizer

Publications (2)

Publication Number Publication Date
JPS5586213A true JPS5586213A (en) 1980-06-28
JPS6256686B2 JPS6256686B2 (en) 1987-11-26

Family

ID=15781602

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16383378A Granted JPS5586213A (en) 1978-12-22 1978-12-22 Automatic equalizer

Country Status (1)

Country Link
JP (1) JPS5586213A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4881059A (en) * 1987-04-30 1989-11-14 American Telephone And Telegraph Company Manchester code receiver

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4917115A (en) * 1972-05-22 1974-02-15
JPS52147044A (en) * 1976-06-01 1977-12-07 Nec Corp Dc balancing unit
JPS5315040A (en) * 1976-07-28 1978-02-10 Toshiba Corp Automatic unit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4917115A (en) * 1972-05-22 1974-02-15
JPS52147044A (en) * 1976-06-01 1977-12-07 Nec Corp Dc balancing unit
JPS5315040A (en) * 1976-07-28 1978-02-10 Toshiba Corp Automatic unit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4881059A (en) * 1987-04-30 1989-11-14 American Telephone And Telegraph Company Manchester code receiver

Also Published As

Publication number Publication date
JPS6256686B2 (en) 1987-11-26

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