JPS5514752A - Light multiple transmission system - Google Patents

Light multiple transmission system

Info

Publication number
JPS5514752A
JPS5514752A JP8751578A JP8751578A JPS5514752A JP S5514752 A JPS5514752 A JP S5514752A JP 8751578 A JP8751578 A JP 8751578A JP 8751578 A JP8751578 A JP 8751578A JP S5514752 A JPS5514752 A JP S5514752A
Authority
JP
Japan
Prior art keywords
transmission
information
frequency diffusion
frequency
optical
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
JP8751578A
Other languages
Japanese (ja)
Inventor
Shuichi Samejima
Seiichi Kurokawa
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP8751578A priority Critical patent/JPS5514752A/en
Publication of JPS5514752A publication Critical patent/JPS5514752A/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)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To increase the degree of multiplexing for light transmission by setting the band width of the transmission signal larger than the transmission information band width via the frequency diffusion code, varying the frequency diffusion code by the information source and then multiplying different information into a single transmission line for transmission. CONSTITUTION:The information given from various types of information sources 11-14 of end office 11 are modulated each through normal modulators 71-74. And these modulation output receive each the frequency diffusion through frequency diffusion circuits 91-94 and by the frequency diffusion codes given from frequency diffusion code generators 81-84. Then the band is increased than the transmission information band width, and each output is modulated through optical modulators 131-135 to be transmitted to optical transmission line 24 in the form of the light multiplex signal and via optical compounding unit 23. This light multiplex signal is branched by optical branching filter 24 of receiver 15, and part of branched signal is converted into the electric signal via optical detector 161. This converted electric signal is diffused reversely through frequency reverse diffusion circuit 251 and via the frequency diffusion code of generator 85 synchronized with the frequency diffusion code of the transmission side, and then the information is regenerated by demodulator 261.
JP8751578A 1978-07-17 1978-07-17 Light multiple transmission system Pending JPS5514752A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8751578A JPS5514752A (en) 1978-07-17 1978-07-17 Light multiple transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8751578A JPS5514752A (en) 1978-07-17 1978-07-17 Light multiple transmission system

Publications (1)

Publication Number Publication Date
JPS5514752A true JPS5514752A (en) 1980-02-01

Family

ID=13917118

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8751578A Pending JPS5514752A (en) 1978-07-17 1978-07-17 Light multiple transmission system

Country Status (1)

Country Link
JP (1) JPS5514752A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0240124A2 (en) * 1986-02-28 1987-10-07 AT&T Corp. Lightwave communication system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0240124A2 (en) * 1986-02-28 1987-10-07 AT&T Corp. Lightwave communication system

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