JPS57171869A - Modulating system - Google Patents

Modulating system

Info

Publication number
JPS57171869A
JPS57171869A JP56057490A JP5749081A JPS57171869A JP S57171869 A JPS57171869 A JP S57171869A JP 56057490 A JP56057490 A JP 56057490A JP 5749081 A JP5749081 A JP 5749081A JP S57171869 A JPS57171869 A JP S57171869A
Authority
JP
Japan
Prior art keywords
signal
modulation
modulated
wave
carrier
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
JP56057490A
Other languages
Japanese (ja)
Inventor
Takanori Fujisawa
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP56057490A priority Critical patent/JPS57171869A/en
Publication of JPS57171869A publication Critical patent/JPS57171869A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/02—Channels characterised by the type of signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

PURPOSE:To transmit a signal wave in which two kinds of data signals are contained, by performing further amplitude modulation on FM-modulated signal wave. CONSTITUTION:An FM-modulated wave (a) is a signal which is obtained by modulating a carrier by a data signal. This FM-modulated wave (a) is AM-modulated by a data signal (b) as a carrier of an AM modulating circuit 3. Therefore, the FM modulation and the AM modulation are performed on the single carrier. When this signal is demodulated, the input signal of the FM modulation can regenerated by installing a limiter at the front step of an FM demodulating circuit. Moreover, an input signal subjected to amplitude modulation is demodulated easily by performing an envelope detection.
JP56057490A 1981-04-15 1981-04-15 Modulating system Pending JPS57171869A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56057490A JPS57171869A (en) 1981-04-15 1981-04-15 Modulating system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56057490A JPS57171869A (en) 1981-04-15 1981-04-15 Modulating system

Publications (1)

Publication Number Publication Date
JPS57171869A true JPS57171869A (en) 1982-10-22

Family

ID=13057155

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56057490A Pending JPS57171869A (en) 1981-04-15 1981-04-15 Modulating system

Country Status (1)

Country Link
JP (1) JPS57171869A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02253747A (en) * 1989-03-28 1990-10-12 Nec Corp Monitoring system for optical submarine cable system
JPH0484584A (en) * 1990-07-26 1992-03-17 Victor Co Of Japan Ltd Digital signal multiplex transmitter and receiver

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02253747A (en) * 1989-03-28 1990-10-12 Nec Corp Monitoring system for optical submarine cable system
JPH0484584A (en) * 1990-07-26 1992-03-17 Victor Co Of Japan Ltd Digital signal multiplex transmitter and receiver

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