JPS56134866A - Frame synchronizing circuit - Google Patents

Frame synchronizing circuit

Info

Publication number
JPS56134866A
JPS56134866A JP3716280A JP3716280A JPS56134866A JP S56134866 A JPS56134866 A JP S56134866A JP 3716280 A JP3716280 A JP 3716280A JP 3716280 A JP3716280 A JP 3716280A JP S56134866 A JPS56134866 A JP S56134866A
Authority
JP
Japan
Prior art keywords
frame
discrimination
stored
pattern
result
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
JP3716280A
Other languages
Japanese (ja)
Inventor
Yutaka Nakazawa
Masahiro Ko
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP3716280A priority Critical patent/JPS56134866A/en
Publication of JPS56134866A publication Critical patent/JPS56134866A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/0602—Systems characterised by the synchronising information used
    • H04J3/0605—Special codes used as synchronising signal
    • H04J3/0608—Detectors therefor, e.g. correlators, state machines

Abstract

PURPOSE:To shorten the time of synchronism recovery by providing a memory element stored with information to discriminate correlativity with a frame synchronizing code pattern at each digit position on the frame of a data string. CONSTITUTION:The output of a pattern detecting circuit, which is the result of bit-by-bit pattern discrimination, is stored in (m)-bit shift register 26. The result of pattern discrimination stored in shift register 26 is read out at the pulse position of the next frame and then compared with the detection result of pattern detecting circuit 12 and when the both agree, flip-flop 21 is reset. Therefore, the discrimination result up to the last frame stored in the shift register is collated with the detection result of the current frame for coincidence discrimination, so that the probability of artificial synchronism is lowered.
JP3716280A 1980-03-24 1980-03-24 Frame synchronizing circuit Pending JPS56134866A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3716280A JPS56134866A (en) 1980-03-24 1980-03-24 Frame synchronizing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3716280A JPS56134866A (en) 1980-03-24 1980-03-24 Frame synchronizing circuit

Publications (1)

Publication Number Publication Date
JPS56134866A true JPS56134866A (en) 1981-10-21

Family

ID=12489894

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3716280A Pending JPS56134866A (en) 1980-03-24 1980-03-24 Frame synchronizing circuit

Country Status (1)

Country Link
JP (1) JPS56134866A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58225755A (en) * 1982-06-24 1983-12-27 Matsushita Electric Ind Co Ltd Frame synchronizing device
JPS60249442A (en) * 1984-02-15 1985-12-10 エタブリシユメント　パブリツク　デ　デイフユ−ジヨン　デイツト“テレデイフユ−ジヨン　デ　フランス” Data pocket broadcasting system for mobile communication
JPS62224139A (en) * 1986-03-26 1987-10-02 Mitsubishi Electric Corp Frame synchronizing circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58225755A (en) * 1982-06-24 1983-12-27 Matsushita Electric Ind Co Ltd Frame synchronizing device
JPS60249442A (en) * 1984-02-15 1985-12-10 エタブリシユメント　パブリツク　デ　デイフユ−ジヨン　デイツト“テレデイフユ−ジヨン　デ　フランス” Data pocket broadcasting system for mobile communication
JPS62224139A (en) * 1986-03-26 1987-10-02 Mitsubishi Electric Corp Frame synchronizing circuit

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