JPS56103562A - Delay wave detecting circuit - Google Patents

Delay wave detecting circuit

Info

Publication number
JPS56103562A
JPS56103562A JP592180A JP592180A JPS56103562A JP S56103562 A JPS56103562 A JP S56103562A JP 592180 A JP592180 A JP 592180A JP 592180 A JP592180 A JP 592180A JP S56103562 A JPS56103562 A JP S56103562A
Authority
JP
Japan
Prior art keywords
circuit
phase
wave
output
modulated
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
JP592180A
Other languages
Japanese (ja)
Inventor
Saburo Aoki
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 JP592180A priority Critical patent/JPS56103562A/en
Publication of JPS56103562A publication Critical patent/JPS56103562A/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
    • H04L27/2277—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses the received modulated signals using remodulation

Abstract

PURPOSE:To facilitate an easy delay wave detection for the double-phase PSK modulated wave that is modulated by a low-speed data, by keeping constant via a phase varying circuit the difference of phase between the carrier wave obtained by modulating the input modulated wave by the phase detection output and the modulated wave that is delayed by a slot time. CONSTITUTION:The modulated wave supplied through the input terminal A is delayed by the delay circuit 1 by a time slot necessary for the delay wave detection system and applied to the phase comparator 3 via the phase varying circuit 1. The modulated wave supplied is also applied to the reverse modulator circuit 4 and phase detecting circuit 6, and a carrier wave is obtained by the output of the circuit 6 through the circuit 4. Then a comparison is carried out between the carrier wave and the signal passed through the circuit 2. The output of comparison is applied to the circuit 2 to keep a constant difference of phase. The output of the circuit 2 is applied to the circuit 6 via the phase device 5 for a fine adjustment of phase. Thus the phase detection output signal B is obtained.
JP592180A 1980-01-22 1980-01-22 Delay wave detecting circuit Pending JPS56103562A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP592180A JPS56103562A (en) 1980-01-22 1980-01-22 Delay wave detecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP592180A JPS56103562A (en) 1980-01-22 1980-01-22 Delay wave detecting circuit

Publications (1)

Publication Number Publication Date
JPS56103562A true JPS56103562A (en) 1981-08-18

Family

ID=11624353

Family Applications (1)

Application Number Title Priority Date Filing Date
JP592180A Pending JPS56103562A (en) 1980-01-22 1980-01-22 Delay wave detecting circuit

Country Status (1)

Country Link
JP (1) JPS56103562A (en)

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