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JPS5530282A - Communication system - Google Patents

Communication system

Info

Publication number
JPS5530282A
JPS5530282A JP10420978A JP10420978A JPS5530282A JP S5530282 A JPS5530282 A JP S5530282A JP 10420978 A JP10420978 A JP 10420978A JP 10420978 A JP10420978 A JP 10420978A JP S5530282 A JPS5530282 A JP S5530282A
Authority
JP
Japan
Prior art keywords
frequency
carrier
invariably
transitions
repeating
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
JP10420978A
Other languages
Japanese (ja)
Other versions
JPS6036144B2 (en
Inventor
Joji Shimakawa
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.)
Matsushima Kogyo KK
Original Assignee
Matsushima Kogyo KK
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 Matsushima Kogyo KK filed Critical Matsushima Kogyo KK
Priority to JP53104209A priority Critical patent/JPS6036144B2/en
Publication of JPS5530282A publication Critical patent/JPS5530282A/en
Publication of JPS6036144B2 publication Critical patent/JPS6036144B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/003—Secret communication by varying carrier frequency at or within predetermined or random intervals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To improve secrecy of communication on a communication system where a carrier frequency varies invariably, by generating a carrier by repeating an infinite period which depends upon selections of transitions of several frequencies. CONSTITUTION:The high-frequency amplifier output frequency (fA) repeating an infinite period which depends upon the selection of the transitions of several frequencies. When the frequency changes, chirp-wave detecting electrodes 4, 5 and 6 generates their outputs. When pulses generated by detecting electrodes 4, 5 and 6 agree with the sequence of controller 8, detector 7 drives sequence generator 9 to generate signal (fB) with frequency transition via surface-wave compressor 2 and delay element 10 of the same constitution. Signals (fA) and (fB) are mixed together and then detected by way of mixer 16 and amplifier 18. Since the carrier frequency varies invariably, its secrecy is high and more communication circuits can be used.
JP53104209A 1978-08-25 1978-08-25 Communication method Expired JPS6036144B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53104209A JPS6036144B2 (en) 1978-08-25 1978-08-25 Communication method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53104209A JPS6036144B2 (en) 1978-08-25 1978-08-25 Communication method

Publications (2)

Publication Number Publication Date
JPS5530282A true JPS5530282A (en) 1980-03-04
JPS6036144B2 JPS6036144B2 (en) 1985-08-19

Family

ID=14374569

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53104209A Expired JPS6036144B2 (en) 1978-08-25 1978-08-25 Communication method

Country Status (1)

Country Link
JP (1) JPS6036144B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6333938A (en) * 1986-07-28 1988-02-13 Kyocera Corp spread spectrum system
JPH02172338A (en) * 1988-12-26 1990-07-03 G D S:Kk Continuous chirp modulation system spread spectrum communication equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6333938A (en) * 1986-07-28 1988-02-13 Kyocera Corp spread spectrum system
JPH02172338A (en) * 1988-12-26 1990-07-03 G D S:Kk Continuous chirp modulation system spread spectrum communication equipment

Also Published As

Publication number Publication date
JPS6036144B2 (en) 1985-08-19

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