JPS5498507A - Transmission and reception method for information signal - Google Patents

Transmission and reception method for information signal

Info

Publication number
JPS5498507A
JPS5498507A JP595078A JP595078A JPS5498507A JP S5498507 A JPS5498507 A JP S5498507A JP 595078 A JP595078 A JP 595078A JP 595078 A JP595078 A JP 595078A JP S5498507 A JPS5498507 A JP S5498507A
Authority
JP
Japan
Prior art keywords
signal
information
frequency
reception
carrier
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
JP595078A
Other languages
Japanese (ja)
Inventor
Takashi Kamata
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 JP595078A priority Critical patent/JPS5498507A/en
Publication of JPS5498507A publication Critical patent/JPS5498507A/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
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying

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)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Radio Transmission System (AREA)

Abstract

PURPOSE:To avoid the reception of mis-signal, by transmitting the carrier of the first and second frequency depending of ''1'' and ''0'' of the input signal through the selection of types of information to be transmitted, selecting the information signal at the reception side, transmitting error signal and re-requesting the signal. CONSTITUTION:At transmission side, the synchronizing signal transmission circuit 11 transmits the carrier of the first frequency for a given period, succeedingly the types A,B,C of the information to be transmitted are generated 20...22, they are selected depending on the setting either of FF4...6, and the frequency f1 is delivered with FSK modulation circuit 4 when the input signal is ''1'' and the frequency f0 is delivered with ''0''. On the other hand, at the reception side, the frequency is synchronized with the bit pulse of the transmitter with the synchronizing clock generating circuit, and the signal to the carrier of frequencies f1 and f0 determined with this receiving point, and the types of information is separated. Further, after the information signal transmisstion stage ends, error signal is transmitted from the reception side and retransmission of signal is requested. Thus, the information signal is selected and the reception of error signal can be avoided.
JP595078A 1978-01-23 1978-01-23 Transmission and reception method for information signal Pending JPS5498507A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP595078A JPS5498507A (en) 1978-01-23 1978-01-23 Transmission and reception method for information signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP595078A JPS5498507A (en) 1978-01-23 1978-01-23 Transmission and reception method for information signal

Publications (1)

Publication Number Publication Date
JPS5498507A true JPS5498507A (en) 1979-08-03

Family

ID=11625164

Family Applications (1)

Application Number Title Priority Date Filing Date
JP595078A Pending JPS5498507A (en) 1978-01-23 1978-01-23 Transmission and reception method for information signal

Country Status (1)

Country Link
JP (1) JPS5498507A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63232650A (en) * 1987-03-20 1988-09-28 Fujitsu Ltd Frame synchronization control system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63232650A (en) * 1987-03-20 1988-09-28 Fujitsu Ltd Frame synchronization control system

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