JPS5469314A - Subsignal superpostion transmission system and unit - Google Patents

Subsignal superpostion transmission system and unit

Info

Publication number
JPS5469314A
JPS5469314A JP13704377A JP13704377A JPS5469314A JP S5469314 A JPS5469314 A JP S5469314A JP 13704377 A JP13704377 A JP 13704377A JP 13704377 A JP13704377 A JP 13704377A JP S5469314 A JPS5469314 A JP S5469314A
Authority
JP
Japan
Prior art keywords
signal
output
modulator
signals
subsignal
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
JP13704377A
Other languages
Japanese (ja)
Inventor
Kazumasa Tsukada
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 JP13704377A priority Critical patent/JPS5469314A/en
Publication of JPS5469314A publication Critical patent/JPS5469314A/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)

Abstract

PURPOSE:To superpose subsignals on the main signal band to transmit them effectively by regarding output signals of the discrimination circuit as modulation signals, transmitting the modulated signals regarded as the output of modulator, regenerating main signal pulses from received pulses in the receiving side and by demodulating subsignals. CONSTITUTION:Pulse width modulator 1 makes the pulse width of a main signal pulse consisting of rundom code sequence change by a modulation signal and LPF 3 selects low frequency component from a modulated signal regarted as the output of modulator 1. Then, the arrangement of the selected component with the output of LPF 3 is made and dicrimination circuit 3 outputs the signal shown by alpha value according to the difference of level between supervisory signals and the subsignal; by regarding the output signal as a modulation signal, the modulated signal regarded as the output of modulator 1 is transmitted, In the receiving side, a main signal pulse is regenerated from the received signal and the subsignal is demodulated. As the result, subsignals are superposed in the main signal region by simple constitution and can be transmitted effectively.
JP13704377A 1977-11-14 1977-11-14 Subsignal superpostion transmission system and unit Pending JPS5469314A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13704377A JPS5469314A (en) 1977-11-14 1977-11-14 Subsignal superpostion transmission system and unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13704377A JPS5469314A (en) 1977-11-14 1977-11-14 Subsignal superpostion transmission system and unit

Publications (1)

Publication Number Publication Date
JPS5469314A true JPS5469314A (en) 1979-06-04

Family

ID=15189520

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13704377A Pending JPS5469314A (en) 1977-11-14 1977-11-14 Subsignal superpostion transmission system and unit

Country Status (1)

Country Link
JP (1) JPS5469314A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09247111A (en) * 1996-03-06 1997-09-19 Nec Corp Method for multiplexing sub-signal and its circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09247111A (en) * 1996-03-06 1997-09-19 Nec Corp Method for multiplexing sub-signal and its circuit

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