JPS54112110A - Communication equipment - Google Patents

Communication equipment

Info

Publication number
JPS54112110A
JPS54112110A JP2011278A JP2011278A JPS54112110A JP S54112110 A JPS54112110 A JP S54112110A JP 2011278 A JP2011278 A JP 2011278A JP 2011278 A JP2011278 A JP 2011278A JP S54112110 A JPS54112110 A JP S54112110A
Authority
JP
Japan
Prior art keywords
frequency
signal
omega1
circuit
pilot signal
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
JP2011278A
Other languages
Japanese (ja)
Other versions
JPS5847896B2 (en
Inventor
Teruo Aoki
Takehiko Tachiki
Kazuhiro Chiba
Shigenori Kino
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP2011278A priority Critical patent/JPS5847896B2/en
Publication of JPS54112110A publication Critical patent/JPS54112110A/en
Publication of JPS5847896B2 publication Critical patent/JPS5847896B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising
    • H04B3/10—Control of transmission; Equalising by pilot signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

PURPOSE:To make digital communication possible with the phase distortion of a circuit removed, by constituting a communication equipment equipped with a circuit corrector correcting the variation in phase or frequency so that the phase variation can be eliminated easily by using a pilot signal. CONSTITUTION:Between modulator 11 and circuit 12 at the transmission side, pilot adding unit 21 is provided which adds a pilot signal with angular frequency (omegap) to a signal at the time when the signal modulated by modulator 11 is sent out to the reception side by using transmitter circuit 12. Further, the reception side is provided with pilot signal detector 23 equipped with frequency converter 45 which extracts the pilot signal from the received signal and then converts this signal into a frequency band centering on (omega1) using a frequency of (omega1)+(omegap) or (omega1)- (omegap), frequency converter 50 which attains frequency convertion by (omega1) using the pilot signal converted by the unit 45, and frequency converter 53 which frequency-converts the signal converted by unit 50 by (omega1), so that the output of this detector 23 will be outputted via switch unit 24 connected to circuit correction circuit 22.
JP2011278A 1978-02-22 1978-02-22 Communication device Expired JPS5847896B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2011278A JPS5847896B2 (en) 1978-02-22 1978-02-22 Communication device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2011278A JPS5847896B2 (en) 1978-02-22 1978-02-22 Communication device

Publications (2)

Publication Number Publication Date
JPS54112110A true JPS54112110A (en) 1979-09-01
JPS5847896B2 JPS5847896B2 (en) 1983-10-25

Family

ID=12018026

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2011278A Expired JPS5847896B2 (en) 1978-02-22 1978-02-22 Communication device

Country Status (1)

Country Link
JP (1) JPS5847896B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6468796A (en) * 1987-09-09 1989-03-14 Matsushita Electric Industrial Co Ltd Expression apparatus for electronic musical instrument

Also Published As

Publication number Publication date
JPS5847896B2 (en) 1983-10-25

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