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JPS55151833A - Data transmitting device - Google Patents

Data transmitting device

Info

Publication number
JPS55151833A
JPS55151833A JP6013479A JP6013479A JPS55151833A JP S55151833 A JPS55151833 A JP S55151833A JP 6013479 A JP6013479 A JP 6013479A JP 6013479 A JP6013479 A JP 6013479A JP S55151833 A JPS55151833 A JP S55151833A
Authority
JP
Japan
Prior art keywords
signal
nrzi
circuit
nrz
data
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
JP6013479A
Other languages
Japanese (ja)
Inventor
Yuichi Kato
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 JP6013479A priority Critical patent/JPS55151833A/en
Publication of JPS55151833A publication Critical patent/JPS55151833A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H04L25/4906—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using binary codes

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Dc Digital Transmission (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

PURPOSE:To facilitate the phase synchronism of the receiving timing signal and thus increase the transmission efficiency, by transmitting the data of the NRZ signal after converting into the signal of the NRZI type in case the data is tansmitted serially via the communication circuit. CONSTITUTION:The data terminal unit of the transmission side delivers the transmission data in the form the NRZ signal which synchronizes with the frequency of one to an optional integer of the carrier frequency. The polarity is converted through NRZI circuit 1 and at the center point of each bit to produce the NRZI signal, and the carrier is modulated with the output of the NRZI signal to be transmitted 2. On the other hand, receiving circuit 5 demodulates the received NRZI signal and then extracts the carrier signal to divide 7 it into one to an optical integer. Then the NRZI signal is converted into the NRZ signal through NRZ converting circuit 6, and at the same time the polarity converting point of the NRZI signal is delivered in the form of the synchronous signal. Receiving the synchronous signal, bit synchronous circuit 8 has the phase synchronism with circuit 7. And the outputs of circuits 8 and 6 are supplied to the data terminal unit of the reception side, and the supplied NRZ signal is decoded with the output of the synchronous circuit. Thus the transmission efficiency can be increased.
JP6013479A 1979-05-16 1979-05-16 Data transmitting device Pending JPS55151833A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6013479A JPS55151833A (en) 1979-05-16 1979-05-16 Data transmitting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6013479A JPS55151833A (en) 1979-05-16 1979-05-16 Data transmitting device

Publications (1)

Publication Number Publication Date
JPS55151833A true JPS55151833A (en) 1980-11-26

Family

ID=13133358

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6013479A Pending JPS55151833A (en) 1979-05-16 1979-05-16 Data transmitting device

Country Status (1)

Country Link
JP (1) JPS55151833A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0646066A (en) * 1983-02-15 1994-02-18 Unisys Corp Encoding system for serial data transmission

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0646066A (en) * 1983-02-15 1994-02-18 Unisys Corp Encoding system for serial data transmission

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