JPS57168542A - Synchronizing method of digital communication system - Google Patents

Synchronizing method of digital communication system

Info

Publication number
JPS57168542A
JPS57168542A JP57038603A JP3860382A JPS57168542A JP S57168542 A JPS57168542 A JP S57168542A JP 57038603 A JP57038603 A JP 57038603A JP 3860382 A JP3860382 A JP 3860382A JP S57168542 A JPS57168542 A JP S57168542A
Authority
JP
Japan
Prior art keywords
counter
pattern
frame
ultraframe
detector
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
JP57038603A
Other languages
Japanese (ja)
Other versions
JPS5912059B2 (en
Inventor
Yukio Takimoto
Iwao Eguchi
Hiroaki Shioda
Yoshiro Watanabe
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
Nippon Telegraph and Telephone Corp
Original Assignee
NEC Corp
Nippon Telegraph and Telephone 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 Telegraph and Telephone Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP57038603A priority Critical patent/JPS5912059B2/en
Publication of JPS57168542A publication Critical patent/JPS57168542A/en
Publication of JPS5912059B2 publication Critical patent/JPS5912059B2/en
Expired 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

Abstract

PURPOSE:To assuredly perform the multiplication, separation, scramble and discramble of information with a small error factor, by distributing the frame synchronizing codes for every integer-fold value of ultraframe synchronization and performing the ultra-frame synchronization with use of the ultraframe synchronizing code. CONSTITUTION:An input signal is supplied to a detector 2 of pattern A as well as to a detector 3 of pattern B in parallel. A frame synchronizing circuit 4 functions so that the pattern A is detected at the time expected by a frame counter 5. Then the frame synchronization is estabilished at the counter 5 when the pattern A is stabilized. On the other hand, an ultraframe counter 6 has the free running with period Tp by the frame pulse supplied from the counter 5. The detector 3 detects an ultraframe synchronizing pattern at a time point expected by the counter 5. At this moment, the detector 3 applies the reset pulse to the counter 6 to ensure the working with a correct phase.
JP57038603A 1982-03-11 1982-03-11 How to synchronize digital communication methods Expired JPS5912059B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57038603A JPS5912059B2 (en) 1982-03-11 1982-03-11 How to synchronize digital communication methods

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57038603A JPS5912059B2 (en) 1982-03-11 1982-03-11 How to synchronize digital communication methods

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP13393777A Division JPS5467310A (en) 1977-11-08 1977-11-08 Synchronizing method and circuit for digital communication system

Publications (2)

Publication Number Publication Date
JPS57168542A true JPS57168542A (en) 1982-10-16
JPS5912059B2 JPS5912059B2 (en) 1984-03-21

Family

ID=12529846

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57038603A Expired JPS5912059B2 (en) 1982-03-11 1982-03-11 How to synchronize digital communication methods

Country Status (1)

Country Link
JP (1) JPS5912059B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61274538A (en) * 1985-05-30 1986-12-04 Nec Corp Method for transmitting control signal in digital transmission system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61274538A (en) * 1985-05-30 1986-12-04 Nec Corp Method for transmitting control signal in digital transmission system
JPH0588580B2 (en) * 1985-05-30 1993-12-22 Nippon Denki Kk

Also Published As

Publication number Publication date
JPS5912059B2 (en) 1984-03-21

Similar Documents

Publication Publication Date Title
JPS53118303A (en) Display unit for plural information
JPS57168542A (en) Synchronizing method of digital communication system
JPS5451512A (en) Tape running direction display system of tape recorders
JPS5461406A (en) Pulse delivery system
JPS5245846A (en) Error correction detection system
JPS5392641A (en) Trouble recorvery processing system of computing control unit
JPS5745646A (en) Information processing system
JPS5231629A (en) Data communiction system
JPS55102952A (en) Mutual synchronization system
JPS5397348A (en) Correctable timing device
JPS5762647A (en) Synchronizing circuit
JPS53122353A (en) Drawing in system for frame synchronism
JPS52116035A (en) Data processing unit
JPS52148A (en) Control unit for information processing apparatus
JPS5467310A (en) Synchronizing method and circuit for digital communication system
JPS57179668A (en) Detecting circuit for frequency
JPS51144539A (en) Synchronized method of plural digital circuits
JPS5385136A (en) Computer undefined instruction detector circuit
JPS52106260A (en) Skip detection circuit of signal reception system
JPS548908A (en) Correstion system of delay detection error
JPS53113577A (en) Setting time output system of timer
JPS53127245A (en) Recovery system for electronic computer
JPS5348774A (en) Electronic watch
JPS5352017A (en) Frequency detector
JPS547846A (en) Discrimination system for digital amplitude, polarity and code