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JPS57162857A - Digital data transmitter - Google Patents

Digital data transmitter

Info

Publication number
JPS57162857A
JPS57162857A JP4798081A JP4798081A JPS57162857A JP S57162857 A JPS57162857 A JP S57162857A JP 4798081 A JP4798081 A JP 4798081A JP 4798081 A JP4798081 A JP 4798081A JP S57162857 A JPS57162857 A JP S57162857A
Authority
JP
Japan
Prior art keywords
pulse
data
leading
period
width
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
JP4798081A
Other languages
Japanese (ja)
Inventor
Toshitaka Tsuda
Takafumi Nakajo
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP4798081A priority Critical patent/JPS57162857A/en
Publication of JPS57162857A publication Critical patent/JPS57162857A/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)

Abstract

PURPOSE:To reproduce the original data through the discrimination of 1 and 0, by detecting and decoding a pulse width at the leading of a pulse through the encoding so that the changing point of 1, 0 and the leading of pulse in FSK code can be coincident without delay. CONSTITUTION:When a data is 1, a transmission line code repeats a pulse P1 in pulse width TM at a period Tp, and the generation of the pulse P1 is stopped at the period T1 just before the data changes from 1 to 0, and the generation of pulse P2 in width Ts(TM>Ts) is stopped at the period T1 just before the data changes from 0 to 1. When the data changes from 0 to 1 or 1 to 0, coding is made so that the point of time of change and the leading of pulse of pulsed FSK code can be coincident without delay, and the pulse width is detected at the leading of the pulse of the FSK code and discrimination is made if the data is 0 or 1, allowing to reproduce the original data.
JP4798081A 1981-03-31 1981-03-31 Digital data transmitter Pending JPS57162857A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4798081A JPS57162857A (en) 1981-03-31 1981-03-31 Digital data transmitter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4798081A JPS57162857A (en) 1981-03-31 1981-03-31 Digital data transmitter

Publications (1)

Publication Number Publication Date
JPS57162857A true JPS57162857A (en) 1982-10-06

Family

ID=12790453

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4798081A Pending JPS57162857A (en) 1981-03-31 1981-03-31 Digital data transmitter

Country Status (1)

Country Link
JP (1) JPS57162857A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01179545A (en) * 1988-01-09 1989-07-17 Yamatake Honeywell Co Ltd Pulse train signal transmission device
JPH02281849A (en) * 1989-04-24 1990-11-19 Japan Aviation Electron Ind Ltd Optical signal transmission equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01179545A (en) * 1988-01-09 1989-07-17 Yamatake Honeywell Co Ltd Pulse train signal transmission device
JPH02281849A (en) * 1989-04-24 1990-11-19 Japan Aviation Electron Ind Ltd Optical signal transmission equipment

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