JPS57140058A - Demodulation system for phase displacement modulation signal - Google Patents

Demodulation system for phase displacement modulation signal

Info

Publication number
JPS57140058A
JPS57140058A JP56025710A JP2571081A JPS57140058A JP S57140058 A JPS57140058 A JP S57140058A JP 56025710 A JP56025710 A JP 56025710A JP 2571081 A JP2571081 A JP 2571081A JP S57140058 A JPS57140058 A JP S57140058A
Authority
JP
Japan
Prior art keywords
fluctuation
phase
carrier wave
modulation signal
phase displacement
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
JP56025710A
Other languages
Japanese (ja)
Inventor
Masaaki Atobe
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 JP56025710A priority Critical patent/JPS57140058A/en
Priority to US06/351,258 priority patent/US4525676A/en
Priority to DE8282101361T priority patent/DE3267962D1/en
Priority to EP82101361A priority patent/EP0059415B1/en
Publication of JPS57140058A publication Critical patent/JPS57140058A/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 achieve stable communication, by detecting the phase fluctuation of carrier wave and controlling the phase of carrier wave passing through a band pass filter through the use of detected fluctuation. CONSTITUTION:In making automatic phase compensation, the fluctuation of phase of carrier wave is detected at a control circuit 8 from an output of a demodulation circuit 2, and a control signal (ec) is generated correspondingly. The polarity is inverted and given to a band pass filter 6, and the control is excercised so that the center frequency is followed to the fluctuation of frequency at the transmission side.
JP56025710A 1981-02-24 1981-02-24 Demodulation system for phase displacement modulation signal Pending JPS57140058A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP56025710A JPS57140058A (en) 1981-02-24 1981-02-24 Demodulation system for phase displacement modulation signal
US06/351,258 US4525676A (en) 1981-02-24 1982-02-22 PSK Demodulation system having carrier frequency variation compensation
DE8282101361T DE3267962D1 (en) 1981-02-24 1982-02-23 System for demodulation of phase-shift keying signals
EP82101361A EP0059415B1 (en) 1981-02-24 1982-02-23 System for demodulation of phase-shift keying signals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56025710A JPS57140058A (en) 1981-02-24 1981-02-24 Demodulation system for phase displacement modulation signal

Publications (1)

Publication Number Publication Date
JPS57140058A true JPS57140058A (en) 1982-08-30

Family

ID=12173340

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56025710A Pending JPS57140058A (en) 1981-02-24 1981-02-24 Demodulation system for phase displacement modulation signal

Country Status (1)

Country Link
JP (1) JPS57140058A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61179642A (en) * 1985-02-04 1986-08-12 Pioneer Electronic Corp Psk demodulaton circuit
JPS6442902A (en) * 1987-08-10 1989-02-15 Hitachi Electronics Carrier recovery device
JPH0613042U (en) * 1991-12-16 1994-02-18 日本高圧電気株式会社 Electric wire fuse

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61179642A (en) * 1985-02-04 1986-08-12 Pioneer Electronic Corp Psk demodulaton circuit
JPS6442902A (en) * 1987-08-10 1989-02-15 Hitachi Electronics Carrier recovery device
JPH0613042U (en) * 1991-12-16 1994-02-18 日本高圧電気株式会社 Electric wire fuse

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