JPS54133812A - Phase synchronous circuit - Google Patents

Phase synchronous circuit

Info

Publication number
JPS54133812A
JPS54133812A JP4167278A JP4167278A JPS54133812A JP S54133812 A JPS54133812 A JP S54133812A JP 4167278 A JP4167278 A JP 4167278A JP 4167278 A JP4167278 A JP 4167278A JP S54133812 A JPS54133812 A JP S54133812A
Authority
JP
Japan
Prior art keywords
signal
data signal
phase
sub
psk
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
JP4167278A
Other languages
Japanese (ja)
Other versions
JPS6313381B2 (en
Inventor
Yasuharu Yoshida
Yoshimi Tagashira
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 JP4167278A priority Critical patent/JPS54133812A/en
Publication of JPS54133812A publication Critical patent/JPS54133812A/en
Publication of JPS6313381B2 publication Critical patent/JPS6313381B2/ja
Granted 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
    • H04L27/2271—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals
    • H04L27/2272—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals using phase locked loops

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 realize a general carrier digital tranamission system by preventing a phase synchronous circuit from having an undesirable phase lead-in stabilization point even when a modulated wave is a continous wave. CONSTITUTION:To the input of the phase synchronous circuit, a composite PSK/ PSK-modulated signal is supplied which is obtained by two-phase-PSK-modulating a signal, two-phase-PSK-modulated by a main data signal, by a sub-data signal. This input signal is detected by taking the output signal of voltage control oscillator 20 as a reference carrier. While sub-data signal S6 from this detection output is regenerated, two main data signal S9 and sub-data signal S10 bearing the cross relation after the sub-data signal is removed are obtained from analog switches 12 and 13 on the basis of the obtained sub-data signal S6. Those signals are multiplied 18 by two to obtain phase error signal S11, which is used as the control signal of voltage control oscillator 20, thereby attaining the phase synchronization.
JP4167278A 1978-04-07 1978-04-07 Phase synchronous circuit Granted JPS54133812A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4167278A JPS54133812A (en) 1978-04-07 1978-04-07 Phase synchronous circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4167278A JPS54133812A (en) 1978-04-07 1978-04-07 Phase synchronous circuit

Publications (2)

Publication Number Publication Date
JPS54133812A true JPS54133812A (en) 1979-10-17
JPS6313381B2 JPS6313381B2 (en) 1988-03-25

Family

ID=12614883

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4167278A Granted JPS54133812A (en) 1978-04-07 1978-04-07 Phase synchronous circuit

Country Status (1)

Country Link
JP (1) JPS54133812A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0094058A2 (en) * 1982-05-07 1983-11-16 Nec Corporation Demodulation device for composite PSK-PSK modulated waves
JPS59196651A (en) * 1983-04-23 1984-11-08 Nec Corp Demodulator
US7110476B1 (en) 1999-02-24 2006-09-19 Nec Corporation Demodulation and modulation circuit and demodulation and modulation method
JP2009038553A (en) * 2007-08-01 2009-02-19 Nippon Telegr & Teleph Corp <Ntt> Digital transmission system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4934764A (en) * 1972-07-31 1974-03-30
JPS5336412A (en) * 1976-09-17 1978-04-04 Fujitsu Ltd Synchronous lead-in system for false 4-phase modulation signal

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4934764A (en) * 1972-07-31 1974-03-30
JPS5336412A (en) * 1976-09-17 1978-04-04 Fujitsu Ltd Synchronous lead-in system for false 4-phase modulation signal

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0094058A2 (en) * 1982-05-07 1983-11-16 Nec Corporation Demodulation device for composite PSK-PSK modulated waves
US4498050A (en) * 1982-05-07 1985-02-05 Nec Corporation Demodulation device for composite PSK-PSK modulated waves
JPS59196651A (en) * 1983-04-23 1984-11-08 Nec Corp Demodulator
JPH024184B2 (en) * 1983-04-23 1990-01-26 Nippon Electric Co
US7110476B1 (en) 1999-02-24 2006-09-19 Nec Corporation Demodulation and modulation circuit and demodulation and modulation method
JP2009038553A (en) * 2007-08-01 2009-02-19 Nippon Telegr & Teleph Corp <Ntt> Digital transmission system

Also Published As

Publication number Publication date
JPS6313381B2 (en) 1988-03-25

Similar Documents

Publication Publication Date Title
KR890702350A (en) Receiving method and receiving antenna system executing the method
JPS5222866A (en) Demodulation system for angle modulated signal wave
JPS54117671A (en) Carrier wave reproducing circuit
JPS54133812A (en) Phase synchronous circuit
DE3669970D1 (en) DIGITAL DEMODULATOR.
IE791644L (en) Carrier regeneration
JPS53128257A (en) Artificial lead-in evasion circuit for reference carrier reproduction circuit
JPS5336412A (en) Synchronous lead-in system for false 4-phase modulation signal
JPS5384670A (en) Demodulating system for multilevel carrier digital signal
JPS5361A (en) Fm modulation circuit
JPS5634203A (en) Fm demodulator
JPS53103362A (en) Digital phase synchronous loop
JPS5434747A (en) Fm demodulation circuit of phase tracking loop system
JPS5335495A (en) Signal detector
JPS55149554A (en) Carrier reproducing circuit
JPS52136551A (en) Carrier wave reproduction unit
JPS5480030A (en) Process circuit for carrier chrominance signal
JPS5616354A (en) Fsk modulating system
JPS53136949A (en) N-phase psk carrier reproducing circuit
FR2397098A1 (en) Compatible multi-channel AM modulator - has source of carrier signal modulated with two signals to produce composite signal
JPS535559A (en) Synchronous demodulation system
JPS52123112A (en) Demodulator automatic phase control unit of multi-direction multiple c ommunication system
JPS57143906A (en) Fm demodulator for composite modulation system
JPS52110514A (en) Signal pressure transmission system by am-pm modulation
JPS54558A (en) Modulation and demodulation system