JPS56111351A - Synchronization system - Google Patents

Synchronization system

Info

Publication number
JPS56111351A
JPS56111351A JP1420680A JP1420680A JPS56111351A JP S56111351 A JPS56111351 A JP S56111351A JP 1420680 A JP1420680 A JP 1420680A JP 1420680 A JP1420680 A JP 1420680A JP S56111351 A JPS56111351 A JP S56111351A
Authority
JP
Japan
Prior art keywords
signal
synchronizing
diffusion
band
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.)
Pending
Application number
JP1420680A
Other languages
Japanese (ja)
Inventor
Hideji Nishimura
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 JP1420680A priority Critical patent/JPS56111351A/en
Publication of JPS56111351A publication Critical patent/JPS56111351A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/04—Speed or phase control by synchronisation signals
    • H04L7/041—Speed or phase control by synchronisation signals using special codes as synchronising signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

PURPOSE:To realize brief and stable synchronization by performing diffusion modulation with wide-band diffusion codes and by separating respective circuits while sharing the same frequency band. CONSTITUTION:A received signal (Rx Signal) is passed through an antenna and high-frequency amplifier and then converted by mixer 21 into an intermediate- frequency signal. A synchronizing signal, included in the received signal, is separated from a diffusion information signal by narrow-band filter 22, amplified by amplifier 23 and phase-synchronously detected by synchronous detector 25 to be extracted as the synchronizing signal. The output of this detector 25 is applied to multiplier 26 to generate the bit-synchronizing clock of diffused codes and while the clock tracking loop consisting of position detector 27 and VCO28 is controlled, controller 30 which controls the start of reverse diffusing code generator 29 is controlled. Consequently, the synchronized signal is correlatively detected by the correlator composed of multiplier 31, etc., and demodulated by demodulator 34 to a high-pitched tone.
JP1420680A 1980-02-07 1980-02-07 Synchronization system Pending JPS56111351A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1420680A JPS56111351A (en) 1980-02-07 1980-02-07 Synchronization system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1420680A JPS56111351A (en) 1980-02-07 1980-02-07 Synchronization system

Publications (1)

Publication Number Publication Date
JPS56111351A true JPS56111351A (en) 1981-09-03

Family

ID=11854626

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1420680A Pending JPS56111351A (en) 1980-02-07 1980-02-07 Synchronization system

Country Status (1)

Country Link
JP (1) JPS56111351A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021245718A1 (en) * 2020-05-30 2021-12-09 公立大学法人公立諏訪東京理科大学 Wireless transmission method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021245718A1 (en) * 2020-05-30 2021-12-09 公立大学法人公立諏訪東京理科大学 Wireless transmission method

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