JPS54138304A - Transmission unit of optical multiplex modulation - Google Patents

Transmission unit of optical multiplex modulation

Info

Publication number
JPS54138304A
JPS54138304A JP4702878A JP4702878A JPS54138304A JP S54138304 A JPS54138304 A JP S54138304A JP 4702878 A JP4702878 A JP 4702878A JP 4702878 A JP4702878 A JP 4702878A JP S54138304 A JPS54138304 A JP S54138304A
Authority
JP
Japan
Prior art keywords
circuit
signal
output
digital
given
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
JP4702878A
Other languages
Japanese (ja)
Inventor
Yasuhiro Kamikubo
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP4702878A priority Critical patent/JPS54138304A/en
Publication of JPS54138304A publication Critical patent/JPS54138304A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25—Arrangements specific to fibre transmission

Abstract

PURPOSE:To transmit the signal in mixture of analog and digital components by using one optical fiber, by transmitting the digital code after adding analogically at the transmission side, and by cancelling it through the addition of the pulse waveform in matching with the digital code after the level detection at the reception side. CONSTITUTION:The transmission side is constituted by providing the modulation circuit 3 modulating the analog input with a given bias, modulation circuir 4 modulating the logical product of digital signal with a given bias corresponding to it, addition circuit 5 adding the output of the circuits 3 and 4, and optical transmitter 6 transmitting the output of the circuit 5 and the addition circuit 5 adding the output of the circuits 3 and 4 to optical fiber 7 after converting the output to optical signal. Further, the optical receiver 8 detecting a given value level of the reception signal and demodulating it into electric signal, digital demodulation circuit 9 detecting a given level of the reception signal and demodulating digital signal, delay circuit 11 delaying the reception signal for a given time, and differential circuit 12 taking the difference between the output of the delay circuit 11 and the circuit 9 and that of the circuit 11 and demodulating the analog signal, are provided.
JP4702878A 1978-04-19 1978-04-19 Transmission unit of optical multiplex modulation Pending JPS54138304A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4702878A JPS54138304A (en) 1978-04-19 1978-04-19 Transmission unit of optical multiplex modulation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4702878A JPS54138304A (en) 1978-04-19 1978-04-19 Transmission unit of optical multiplex modulation

Publications (1)

Publication Number Publication Date
JPS54138304A true JPS54138304A (en) 1979-10-26

Family

ID=12763716

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4702878A Pending JPS54138304A (en) 1978-04-19 1978-04-19 Transmission unit of optical multiplex modulation

Country Status (1)

Country Link
JP (1) JPS54138304A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61267426A (en) * 1985-05-21 1986-11-27 エステイーシー・ピーエルシー Auxiliary low frequency channel demodulator for digital transmission system
JPH01233846A (en) * 1988-03-15 1989-09-19 Fujitsu Ltd Data transfer system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61267426A (en) * 1985-05-21 1986-11-27 エステイーシー・ピーエルシー Auxiliary low frequency channel demodulator for digital transmission system
JPH01233846A (en) * 1988-03-15 1989-09-19 Fujitsu Ltd Data transfer system

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