JPS5776945A - Optical multiplex modulation system - Google Patents

Optical multiplex modulation system

Info

Publication number
JPS5776945A
JPS5776945A JP55151373A JP15137380A JPS5776945A JP S5776945 A JPS5776945 A JP S5776945A JP 55151373 A JP55151373 A JP 55151373A JP 15137380 A JP15137380 A JP 15137380A JP S5776945 A JPS5776945 A JP S5776945A
Authority
JP
Japan
Prior art keywords
pulse
pulse width
demodulator
pulse frequency
modulator
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
JP55151373A
Other languages
Japanese (ja)
Inventor
Taro Shibagaki
Takeshi Koseki
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP55151373A priority Critical patent/JPS5776945A/en
Publication of JPS5776945A publication Critical patent/JPS5776945A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J9/00—Multiplex systems in which each channel is represented by a different type of modulation of the carrier

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To achieve multiplex transmission very simply, by adding a pulse width modulator of an external synchronizing type and a pulse width demodulator to a conventional pulse frequency modulation transmission system. CONSTITUTION:A modulation light in optical pulse frequency modulation includes information only at leading edge of the pulse and includes no information at the pulse width. Taking notice of this fact, an output pulse width in pulse frequency modulation of a pulse frequency modulator 3 is modulated into binary value with a digital input signal at a pulse width modulator 4. This pulse train is received at a receiver 7 and inputted to a pulse frequency demodulator 8 and a pulse width demodulator 9 for demodulation. As a result, the use of a conventional analog signal filter with high performance is avoided, allowing to make multiplex transmission very simply.
JP55151373A 1980-10-30 1980-10-30 Optical multiplex modulation system Pending JPS5776945A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55151373A JPS5776945A (en) 1980-10-30 1980-10-30 Optical multiplex modulation system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55151373A JPS5776945A (en) 1980-10-30 1980-10-30 Optical multiplex modulation system

Publications (1)

Publication Number Publication Date
JPS5776945A true JPS5776945A (en) 1982-05-14

Family

ID=15517134

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55151373A Pending JPS5776945A (en) 1980-10-30 1980-10-30 Optical multiplex modulation system

Country Status (1)

Country Link
JP (1) JPS5776945A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0201971A2 (en) * 1985-05-10 1986-11-20 Philips Electronics Uk Limited Communication system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0201971A2 (en) * 1985-05-10 1986-11-20 Philips Electronics Uk Limited Communication system

Similar Documents

Publication Publication Date Title
BR9305988A (en) Demodulator for consumer uses
CA2037351A1 (en) Optical transmitter
JPS57201351A (en) Digital burst signal communicating system
WO1994007310A3 (en) Analogue to digital and digital to analogue converters
EP0364273A3 (en) Digital demodulator system
GB1519937A (en) Multistage selective differential pulse code modulation system
GB2003367A (en) High speed transmission of binary data over an fm communications system
JPS555516A (en) Code transmission system
JPS5776945A (en) Optical multiplex modulation system
EP0285252A3 (en) Digital signal demodulation
JPS5718145A (en) Signal separation system
JPS56152346A (en) Optical transmission and receiving device
FR2237358A1 (en) Angularly modulated carrier oscillation demodulator - for video disc reading involves using limiter differential amplifier
DE3377326D1 (en) Digital direct rf-modulation method and circuit arrangement for carrying out said method
EP0147008A3 (en) Bilateral digital fsk communication system interface using digital technique
IE790599L (en) Monitoring of signal quality
JPS54138304A (en) Transmission unit of optical multiplex modulation
JPS54134904A (en) Light transmission system
JPS56157150A (en) Composite digital communication system
JPS5469314A (en) Subsignal superpostion transmission system and unit
JPS53106108A (en) Signal transmitting circuit
JPS55120240A (en) Supervisory signal transmission system
JPS5538774A (en) Optical signal transmission system
JPS5711564A (en) Transmission system for burst signal
JPS6471337A (en) Optical transmission system