JPS573449A - Error correcting system - Google Patents

Error correcting system

Info

Publication number
JPS573449A
JPS573449A JP7728780A JP7728780A JPS573449A JP S573449 A JPS573449 A JP S573449A JP 7728780 A JP7728780 A JP 7728780A JP 7728780 A JP7728780 A JP 7728780A JP S573449 A JPS573449 A JP S573449A
Authority
JP
Japan
Prior art keywords
data
correct
frequency
transmitted
reception side
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
JP7728780A
Other languages
Japanese (ja)
Inventor
Toshiyuki Fujiwara
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.)
Japan Radio Co Ltd
Original Assignee
Japan Radio 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 Japan Radio Co Ltd filed Critical Japan Radio Co Ltd
Priority to JP7728780A priority Critical patent/JPS573449A/en
Publication of JPS573449A publication Critical patent/JPS573449A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

PURPOSE:To correct the error due to fading and radio interference normally in an FDM system, by frequency-dividing transmission data, transmitting it >=3 times by shifting time and modulated frequency, and discriminating it by majority decision at demodulation at reception side. CONSTITUTION:Transmission data is frequency-divided at transmission side each subchannel, the data is transmitted >=3 times by shifting time and modulation frequency without duplication, it is demodulated at the reception side and correct data is obtained by a majority decision method. For example, a serial digital data as shown in Figure, is fed to a code converter, where serial-parallel conversion is made to form the data as shown in Figure, and further it is fed to an FDM modulator and then transmitted by modulating it by PSK etc. At the reception side, this signal is demodulated at an FDM demodulator to reproduce the original data, and this is applied to a majority decision discriminator, and if the transmission data is transmitted consecutively 3 times, when the data of twice or more is correct, this is outputted as a correct data.
JP7728780A 1980-06-09 1980-06-09 Error correcting system Pending JPS573449A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7728780A JPS573449A (en) 1980-06-09 1980-06-09 Error correcting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7728780A JPS573449A (en) 1980-06-09 1980-06-09 Error correcting system

Publications (1)

Publication Number Publication Date
JPS573449A true JPS573449A (en) 1982-01-08

Family

ID=13629650

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7728780A Pending JPS573449A (en) 1980-06-09 1980-06-09 Error correcting system

Country Status (1)

Country Link
JP (1) JPS573449A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61228791A (en) * 1985-04-02 1986-10-11 Matsushita Electric Ind Co Ltd Method for transmitting/receiving data of catv system
JPH02101836A (en) * 1988-10-11 1990-04-13 Kokusai Electric Co Ltd High speed synchronizing circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5472609A (en) * 1977-11-21 1979-06-11 Nec Corp Digital communication system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5472609A (en) * 1977-11-21 1979-06-11 Nec Corp Digital communication system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61228791A (en) * 1985-04-02 1986-10-11 Matsushita Electric Ind Co Ltd Method for transmitting/receiving data of catv system
JPH02101836A (en) * 1988-10-11 1990-04-13 Kokusai Electric Co Ltd High speed synchronizing circuit

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