JPS5690648A - Auxiliary signal transmission system - Google Patents

Auxiliary signal transmission system

Info

Publication number
JPS5690648A
JPS5690648A JP16694479A JP16694479A JPS5690648A JP S5690648 A JPS5690648 A JP S5690648A JP 16694479 A JP16694479 A JP 16694479A JP 16694479 A JP16694479 A JP 16694479A JP S5690648 A JPS5690648 A JP S5690648A
Authority
JP
Japan
Prior art keywords
signal
auxiliary signal
auxiliary
main signal
received
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
JP16694479A
Other languages
Japanese (ja)
Inventor
Takayuki Ozaki
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP16694479A priority Critical patent/JPS5690648A/en
Publication of JPS5690648A publication Critical patent/JPS5690648A/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)
  • Radio Transmission System (AREA)

Abstract

PURPOSE:To realize application to a system whose fixed deterioration increases due to frequency modulation, by transmitting an auxiliary signal by diffusing its frequency band to a frequency band assigned to a main signal by using a spectrum diffusion system. CONSTITUTION:Main signal (a) is modulated by modulator 11 and at the same time, auxiliary signal (b) is also modulated by modulator 12 by using spurious noise carrier source 13. Composite signal (c) of main signal (a) and auxiliary signal (b) is received by receiver 2. This received signal (c) is demodulated by main signal demodulator 21 to extract main signal (a). Further, the received signal (c) is transferred to correlator 23 via detector 22 to find the correlation to the output signal of spurious noise carrier source 24 generating the same signal with spurious carrier source 13 of transmitter 1. Then, auxiliary signal (b) is extracted by the output of correlator 23.
JP16694479A 1979-12-24 1979-12-24 Auxiliary signal transmission system Pending JPS5690648A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16694479A JPS5690648A (en) 1979-12-24 1979-12-24 Auxiliary signal transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16694479A JPS5690648A (en) 1979-12-24 1979-12-24 Auxiliary signal transmission system

Publications (1)

Publication Number Publication Date
JPS5690648A true JPS5690648A (en) 1981-07-22

Family

ID=15840521

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16694479A Pending JPS5690648A (en) 1979-12-24 1979-12-24 Auxiliary signal transmission system

Country Status (1)

Country Link
JP (1) JPS5690648A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0098300A1 (en) * 1982-01-08 1984-01-18 Applied Spectrum Tech Simultaneous transmission of two information signals within a band-limited communications channel.
US4682327A (en) * 1984-02-03 1987-07-21 Nippon Telegraph And Telephone Corp. Polyphase phase lock oscillator
JPS62176232A (en) * 1986-01-29 1987-08-03 Nippon Telegr & Teleph Corp <Ntt> Multiplex transmission system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0098300A1 (en) * 1982-01-08 1984-01-18 Applied Spectrum Tech Simultaneous transmission of two information signals within a band-limited communications channel.
US4682327A (en) * 1984-02-03 1987-07-21 Nippon Telegraph And Telephone Corp. Polyphase phase lock oscillator
JPS62176232A (en) * 1986-01-29 1987-08-03 Nippon Telegr & Teleph Corp <Ntt> Multiplex transmission system

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