JPS548901A - Modulation and demodulation circuit - Google Patents

Modulation and demodulation circuit

Info

Publication number
JPS548901A
JPS548901A JP7462477A JP7462477A JPS548901A JP S548901 A JPS548901 A JP S548901A JP 7462477 A JP7462477 A JP 7462477A JP 7462477 A JP7462477 A JP 7462477A JP S548901 A JPS548901 A JP S548901A
Authority
JP
Japan
Prior art keywords
modulation
demodulation circuit
reception
data
shifting
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
JP7462477A
Other languages
Japanese (ja)
Inventor
Isao Watanabe
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 JP7462477A priority Critical patent/JPS548901A/en
Publication of JPS548901A publication Critical patent/JPS548901A/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
    • H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
    • H04L1/0083—Formatting with frames or packets; Protocol or part of protocol for error control

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To improve the data delivery quality of duplex communication by audio coupling system, by improving the reception S/N, through shifting the transmission frequency in data reception.
JP7462477A 1977-06-22 1977-06-22 Modulation and demodulation circuit Pending JPS548901A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7462477A JPS548901A (en) 1977-06-22 1977-06-22 Modulation and demodulation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7462477A JPS548901A (en) 1977-06-22 1977-06-22 Modulation and demodulation circuit

Publications (1)

Publication Number Publication Date
JPS548901A true JPS548901A (en) 1979-01-23

Family

ID=13552518

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7462477A Pending JPS548901A (en) 1977-06-22 1977-06-22 Modulation and demodulation circuit

Country Status (1)

Country Link
JP (1) JPS548901A (en)

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