JPS5561164A - Signal transmission and reception system - Google Patents

Signal transmission and reception system

Info

Publication number
JPS5561164A
JPS5561164A JP13503578A JP13503578A JPS5561164A JP S5561164 A JPS5561164 A JP S5561164A JP 13503578 A JP13503578 A JP 13503578A JP 13503578 A JP13503578 A JP 13503578A JP S5561164 A JPS5561164 A JP S5561164A
Authority
JP
Japan
Prior art keywords
signal
circuit
phase
modulation
transmission
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
JP13503578A
Other languages
Japanese (ja)
Inventor
Tadaaki Ogata
Yasunobu Sueyasu
Kiyoshi Obara
Takayoshi Ueno
Noriaki Kakazu
Yoshinori Takiishi
Toshiyuki Taguchi
Kenji Kobayashi
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.)
TOKYO SOGO KEIBI HOSHIYOU KK
NEC Corp
Sohgo Security Services Co Ltd
Original Assignee
TOKYO SOGO KEIBI HOSHIYOU KK
NEC Corp
Sohgo Security Services Co Ltd
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 TOKYO SOGO KEIBI HOSHIYOU KK, NEC Corp, Sohgo Security Services Co Ltd, Nippon Electric Co Ltd filed Critical TOKYO SOGO KEIBI HOSHIYOU KK
Priority to JP13503578A priority Critical patent/JPS5561164A/en
Publication of JPS5561164A publication Critical patent/JPS5561164A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/227—Demodulator circuits; Receiver circuits using coherent demodulation
    • H04L27/2275—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses the received modulated signals

Landscapes

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

Abstract

PURPOSE:To narrower the transmission band and to enable reliable transmission and reception of signal, by transmitting the signal in two phase difference phase modulation from the transmission side and discriminating signal in phase comparison by the time of one modulation element at reception side. CONSTITUTION:To the switching of the contact of transmitter, transmission carrier is shifted for the different phase per one second corresponding to a given logic 0, 1, and the signal of phase modulation pulse code train is delivered on the line. The phase modulation signal from this transmitter is demodulated with the output of the clock oscillation circuit 15 at the demodulation circuit 12 and it is fed via LPF 13 to the phase discrimination circuit 16, demodulation carrier reproduction circuit 14 and timing reproduction circuit 17. The circuit 14 makes self running of the frequency of circuit 15 even if the demodulated signal is tentatively interrupted, and the carrier signal being the reference of the phase discrimination is delivered to the circuit 16 with a given period and phase, and the circuit 17 produces the timing signal at section point of one modulation element and signal is discriminated with phase comparison for the time of one modulation element.
JP13503578A 1978-11-01 1978-11-01 Signal transmission and reception system Pending JPS5561164A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13503578A JPS5561164A (en) 1978-11-01 1978-11-01 Signal transmission and reception system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13503578A JPS5561164A (en) 1978-11-01 1978-11-01 Signal transmission and reception system

Publications (1)

Publication Number Publication Date
JPS5561164A true JPS5561164A (en) 1980-05-08

Family

ID=15142412

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13503578A Pending JPS5561164A (en) 1978-11-01 1978-11-01 Signal transmission and reception system

Country Status (1)

Country Link
JP (1) JPS5561164A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018125700A (en) * 2017-01-31 2018-08-09 日本信号株式会社 Control system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51139241A (en) * 1975-04-26 1976-12-01 Koden Electronics Co Ltd Means for discriminating phase of synchronizing wave

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51139241A (en) * 1975-04-26 1976-12-01 Koden Electronics Co Ltd Means for discriminating phase of synchronizing wave

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018125700A (en) * 2017-01-31 2018-08-09 日本信号株式会社 Control system

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