JPS56157150A - Composite digital communication system - Google Patents

Composite digital communication system

Info

Publication number
JPS56157150A
JPS56157150A JP6093680A JP6093680A JPS56157150A JP S56157150 A JPS56157150 A JP S56157150A JP 6093680 A JP6093680 A JP 6093680A JP 6093680 A JP6093680 A JP 6093680A JP S56157150 A JPS56157150 A JP S56157150A
Authority
JP
Japan
Prior art keywords
signals
circuit
modulated
demodulated
group
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.)
Granted
Application number
JP6093680A
Other languages
Japanese (ja)
Other versions
JPH0250663B2 (en
Inventor
Toshitake Noguchi
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 JP6093680A priority Critical patent/JPS56157150A/en
Publication of JPS56157150A publication Critical patent/JPS56157150A/en
Publication of JPH0250663B2 publication Critical patent/JPH0250663B2/ja
Granted 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)

Abstract

PURPOSE:To ensure a reproduction of only the required signal group with a simple demodulator, by giving a different digital modulating system to the signals to be transmitted with every group and then transmitting them with a time-division multiplication given with every group. CONSTITUTION:The signals supplied to the input terminals 11 and 12 are grouped in time division through a multiplying circuit 13. One of the grouped signals is modulated by an FSK modulator 21, and the other one is modulated by a double- phase modulator 22. These modulated signals receive a time-division multiplication through a synthesizing circuit 23 to be turned into a row of signals. At the reception side, the FSK modulated wave is demodulated by a demodulator 24, and the double-phase modulated wave is demodulated by a synchronizing circuit 25. The demodulated signal is applied to a reproducing circuit 26 to reproduce a code, and at the same time selected for only the necessary signal through the circuit 25 to be delivered to a terminal 27.
JP6093680A 1980-05-08 1980-05-08 Composite digital communication system Granted JPS56157150A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6093680A JPS56157150A (en) 1980-05-08 1980-05-08 Composite digital communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6093680A JPS56157150A (en) 1980-05-08 1980-05-08 Composite digital communication system

Publications (2)

Publication Number Publication Date
JPS56157150A true JPS56157150A (en) 1981-12-04
JPH0250663B2 JPH0250663B2 (en) 1990-11-05

Family

ID=13156753

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6093680A Granted JPS56157150A (en) 1980-05-08 1980-05-08 Composite digital communication system

Country Status (1)

Country Link
JP (1) JPS56157150A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015523015A (en) * 2012-06-16 2015-08-06 天地融科技股▲ふん▼有限公司 Audio data transmission system, audio data transmission apparatus, and electronic signature key
JP2018516501A (en) * 2015-04-17 2018-06-21 ホアウェイ・テクノロジーズ・カンパニー・リミテッド Digital representation of analog signals and control words using different multilevel modulation formats
US10205522B2 (en) 2015-06-18 2019-02-12 Futurewei Technologies, Inc. Cascaded waveform modulation with an embedded control signal for high-performance mobile fronthaul

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015523015A (en) * 2012-06-16 2015-08-06 天地融科技股▲ふん▼有限公司 Audio data transmission system, audio data transmission apparatus, and electronic signature key
JP2018516501A (en) * 2015-04-17 2018-06-21 ホアウェイ・テクノロジーズ・カンパニー・リミテッド Digital representation of analog signals and control words using different multilevel modulation formats
US10205522B2 (en) 2015-06-18 2019-02-12 Futurewei Technologies, Inc. Cascaded waveform modulation with an embedded control signal for high-performance mobile fronthaul

Also Published As

Publication number Publication date
JPH0250663B2 (en) 1990-11-05

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