JPS5631246A - Spread spectrum communication system - Google Patents

Spread spectrum communication system

Info

Publication number
JPS5631246A
JPS5631246A JP10726179A JP10726179A JPS5631246A JP S5631246 A JPS5631246 A JP S5631246A JP 10726179 A JP10726179 A JP 10726179A JP 10726179 A JP10726179 A JP 10726179A JP S5631246 A JPS5631246 A JP S5631246A
Authority
JP
Japan
Prior art keywords
signal
input
adder
output
false
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
JP10726179A
Other languages
Japanese (ja)
Inventor
Nobuo Tsukamoto
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP10726179A priority Critical patent/JPS5631246A/en
Publication of JPS5631246A publication Critical patent/JPS5631246A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems

Landscapes

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

Abstract

PURPOSE:To shorten the synchronization establishing time in the search mode, by using two carrier waves different in frequency and two false noise codes different in code. CONSTITUTION:Transmission data S17 and false signal code S16 are added by binary adder 3, and carrier wave S11 is phase-modulated by output S18 and is input to adder 16. Carrier wave S11 is input to phase modulator 14 and is modulated by false noise signal S13 and is input to adder 16. False signal noise code S13 is input to binary adder 13, and exclusive OR between this signal and start pulse S12 is operated to output polarity-inverted pulse S14. Carrier wave S10 is modulated in phase modulator 15 by this signal to output signal S15, and this signal is input to adder 16. These three kinds of signal are mixed and are output from antenna 8. Radio waves received by antenna 20 are separated by filter circuits 41 and 21 and are input to the phase modulator to take out frequency components S19 of the difference between outputs of circuits 41 and 21.
JP10726179A 1979-08-24 1979-08-24 Spread spectrum communication system Pending JPS5631246A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10726179A JPS5631246A (en) 1979-08-24 1979-08-24 Spread spectrum communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10726179A JPS5631246A (en) 1979-08-24 1979-08-24 Spread spectrum communication system

Publications (1)

Publication Number Publication Date
JPS5631246A true JPS5631246A (en) 1981-03-30

Family

ID=14454556

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10726179A Pending JPS5631246A (en) 1979-08-24 1979-08-24 Spread spectrum communication system

Country Status (1)

Country Link
JP (1) JPS5631246A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6323717A (en) * 1986-07-16 1988-02-01 ニーロ、アクティーゼルスカップ Removal of mercury vapor and/or vapor of harmful organic substance and/or nitrogen oxide from flue gas generated fromincinerator equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6323717A (en) * 1986-07-16 1988-02-01 ニーロ、アクティーゼルスカップ Removal of mercury vapor and/or vapor of harmful organic substance and/or nitrogen oxide from flue gas generated fromincinerator equipment

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