JPS5481705A - Error correction unit - Google Patents

Error correction unit

Info

Publication number
JPS5481705A
JPS5481705A JP14953477A JP14953477A JPS5481705A JP S5481705 A JPS5481705 A JP S5481705A JP 14953477 A JP14953477 A JP 14953477A JP 14953477 A JP14953477 A JP 14953477A JP S5481705 A JPS5481705 A JP S5481705A
Authority
JP
Japan
Prior art keywords
circuit
output
alpha
register
module
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
JP14953477A
Other languages
Japanese (ja)
Other versions
JPS617653B2 (en
Inventor
Iwao Eguchi
Yukio Takimoto
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 JP14953477A priority Critical patent/JPS5481705A/en
Publication of JPS5481705A publication Critical patent/JPS5481705A/en
Publication of JPS617653B2 publication Critical patent/JPS617653B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/03—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words
    • H03M13/05—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits
    • H03M13/13—Linear codes
    • H03M13/15—Cyclic codes, i.e. cyclic shifts of codewords produce other codewords, e.g. codes defined by a generator polynomial, Bose-Chaudhuri-Hocquenghem [BCH] codes

Landscapes

  • Physics & Mathematics (AREA)
  • Algebra (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Pure & Applied Mathematics (AREA)
  • Probability & Statistics with Applications (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Detection And Correction Of Errors (AREA)
  • Error Detection And Correction (AREA)

Abstract

PURPOSE:To obtain the error position of the double error correction BCH code with a simple circuit constitution, by checking the syndrome obtained from the reception signal and the condition of the result of module 2 addition with the specified value prepared at the reception side. CONSTITUTION:The syndrme S1 is obtained for the reception signal r<0>-r14 of one block length with the division circuit 1 and it is stored in the register 3, and the syndrome S3 is obtained with the operation circuit 2 and the module 2 addition circuit 11, and it is stored in the register 4. On the other hand, the production circuit 5 of alpha<i> produces output every one clock shift, and this output and the output of the register 3 are made for the module 2 addition with the circuits 12 to 15 into alpha<j>. It is into third power at the circuit 7, and the output of the production circuit 6 of alpha<3i> and the output of the register 4 are made for the module 2 addition in the circuits 16 to 19 into alpha<1>. The output and the output of the circuit 7 are compared 8 and when the agreement pulse is obtained, the circuit 20 performs the correction for the recption data.
JP14953477A 1977-12-12 1977-12-12 Error correction unit Granted JPS5481705A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14953477A JPS5481705A (en) 1977-12-12 1977-12-12 Error correction unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14953477A JPS5481705A (en) 1977-12-12 1977-12-12 Error correction unit

Publications (2)

Publication Number Publication Date
JPS5481705A true JPS5481705A (en) 1979-06-29
JPS617653B2 JPS617653B2 (en) 1986-03-07

Family

ID=15477230

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14953477A Granted JPS5481705A (en) 1977-12-12 1977-12-12 Error correction unit

Country Status (1)

Country Link
JP (1) JPS5481705A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59149545A (en) * 1983-02-16 1984-08-27 Canon Inc Data error correcting system
JPH03179923A (en) * 1989-12-08 1991-08-05 Matsushita Electric Ind Co Ltd Method and device for decoding bch code

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59149545A (en) * 1983-02-16 1984-08-27 Canon Inc Data error correcting system
JPH03179923A (en) * 1989-12-08 1991-08-05 Matsushita Electric Ind Co Ltd Method and device for decoding bch code

Also Published As

Publication number Publication date
JPS617653B2 (en) 1986-03-07

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