JPS54114028A - Direct phase reproducing device - Google Patents

Direct phase reproducing device

Info

Publication number
JPS54114028A
JPS54114028A JP2120878A JP2120878A JPS54114028A JP S54114028 A JPS54114028 A JP S54114028A JP 2120878 A JP2120878 A JP 2120878A JP 2120878 A JP2120878 A JP 2120878A JP S54114028 A JPS54114028 A JP S54114028A
Authority
JP
Japan
Prior art keywords
frequency
signal
phase
output
input
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
JP2120878A
Other languages
Japanese (ja)
Other versions
JPS5814112B2 (en
Inventor
Shozo Komaki
Satoru Akeyama
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP2120878A priority Critical patent/JPS5814112B2/en
Publication of JPS54114028A publication Critical patent/JPS54114028A/en
Publication of JPS5814112B2 publication Critical patent/JPS5814112B2/en
Expired 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

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 perform the direct phase reproduction simultaneously with the frequency conversion by carrying out the frequency conversion of the input signal with use of the frequency signal featuring the same frequency as the input or output signal plus the reference signal featuring the phase synchronization with the input or output signal. CONSTITUTION:The frequency mixture is given between the output of oscillator 13 which oscilltates with frequency f0 identical to the input signal frequency and the reference signal sent from terminal 15 and featuring the phase synchronization with output frequency f1 through 1st conversion part 14. And output f0+ or -f1 is applied to 2nd conversion part 16 in the form of the local signal. The frequency mixture is given at part 16 between the double-phase modulation input signal of frequency f0 which underwent the phase deviation by the noise given from input terminal 11 and the above mentioned local signal, and these mixed signals are then applied to band pass filter 17 featuring frequency f1. As a result, the phase reproduction signal which is fixed to the phase of 0 or pi is obtained at output terminal 18 via the phase of the input signal.
JP2120878A 1978-02-24 1978-02-24 direct phase regenerator Expired JPS5814112B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2120878A JPS5814112B2 (en) 1978-02-24 1978-02-24 direct phase regenerator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2120878A JPS5814112B2 (en) 1978-02-24 1978-02-24 direct phase regenerator

Publications (2)

Publication Number Publication Date
JPS54114028A true JPS54114028A (en) 1979-09-05
JPS5814112B2 JPS5814112B2 (en) 1983-03-17

Family

ID=12048563

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2120878A Expired JPS5814112B2 (en) 1978-02-24 1978-02-24 direct phase regenerator

Country Status (1)

Country Link
JP (1) JPS5814112B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02120970U (en) * 1989-03-16 1990-10-01

Also Published As

Publication number Publication date
JPS5814112B2 (en) 1983-03-17

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