JPS55121758A - Decoder for cyclic code - Google Patents

Decoder for cyclic code

Info

Publication number
JPS55121758A
JPS55121758A JP2821779A JP2821779A JPS55121758A JP S55121758 A JPS55121758 A JP S55121758A JP 2821779 A JP2821779 A JP 2821779A JP 2821779 A JP2821779 A JP 2821779A JP S55121758 A JPS55121758 A JP S55121758A
Authority
JP
Japan
Prior art keywords
buffer
comparator
bit number
syndrome
amount equivalent
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
JP2821779A
Other languages
Japanese (ja)
Other versions
JPS625380B2 (en
Inventor
Keiichiro Koga
Yutaka Yasuda
Ryokichi Saga
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
KDDI Corp
Original Assignee
Kokusai Denshin Denwa KK
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 Kokusai Denshin Denwa KK, NEC Corp, Nippon Electric Co Ltd filed Critical Kokusai Denshin Denwa KK
Priority to JP2821779A priority Critical patent/JPS55121758A/en
Priority to US06/129,486 priority patent/US4320511A/en
Priority to CA000347495A priority patent/CA1148660A/en
Priority to GB8008302A priority patent/GB2050121B/en
Publication of JPS55121758A publication Critical patent/JPS55121758A/en
Publication of JPS625380B2 publication Critical patent/JPS625380B2/ja
Granted 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
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control

Abstract

PURPOSE:To obtain a decoder for the cyclic code which can perform the decoding by regarding that the zero precedes by the amount equivalent to the smaller bit number in case the information bit number is less than the amount equivalent to 1-block length. CONSTITUTION:Reception input data (a) is delivered via buffer 101 and also applied to syndrome generator 102. The syndrome grown reads out ROM table 104 possessing the error position pattern via address buffer 103. The pattern read out is given to comparator 106 via buffer 105, and the coincidence is obtained with the output of block counter 107 or 111 which is applied via switch circuit 108. And comparator 106 delivers error correction pulse (h). Timing control parts 110 and 112 receive timing signals CP1 and CP2 showing the head and the end of the reception data burst to give the control to counters 107 and 111 as well as to syndrome generator 102 via shortened block control part 113 in order to cope with the shortened signal.
JP2821779A 1979-03-13 1979-03-13 Decoder for cyclic code Granted JPS55121758A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2821779A JPS55121758A (en) 1979-03-13 1979-03-13 Decoder for cyclic code
US06/129,486 US4320511A (en) 1979-03-13 1980-03-11 Method and device for conversion between a cyclic and a general code sequence by the use of dummy zero bit series
CA000347495A CA1148660A (en) 1979-03-13 1980-03-12 Method and device for carrying out conversion between a cyclic and a general code sequence by the use of a hypothetical zero bit series
GB8008302A GB2050121B (en) 1979-03-13 1980-03-12 Method and device for carrying out conversion between a cyclic and a general code sequence by the use of a hypothetical zero bit series

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2821779A JPS55121758A (en) 1979-03-13 1979-03-13 Decoder for cyclic code

Publications (2)

Publication Number Publication Date
JPS55121758A true JPS55121758A (en) 1980-09-19
JPS625380B2 JPS625380B2 (en) 1987-02-04

Family

ID=12242455

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2821779A Granted JPS55121758A (en) 1979-03-13 1979-03-13 Decoder for cyclic code

Country Status (1)

Country Link
JP (1) JPS55121758A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01160118A (en) * 1987-12-16 1989-06-23 Fujitsu Ltd Bch decoder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01160118A (en) * 1987-12-16 1989-06-23 Fujitsu Ltd Bch decoder

Also Published As

Publication number Publication date
JPS625380B2 (en) 1987-02-04

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