JPS57180248A - Data communication system - Google Patents

Data communication system

Info

Publication number
JPS57180248A
JPS57180248A JP6342981A JP6342981A JPS57180248A JP S57180248 A JPS57180248 A JP S57180248A JP 6342981 A JP6342981 A JP 6342981A JP 6342981 A JP6342981 A JP 6342981A JP S57180248 A JPS57180248 A JP S57180248A
Authority
JP
Japan
Prior art keywords
data
signal
transmission signal
samples
delayed
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
JP6342981A
Other languages
Japanese (ja)
Inventor
Yoichi Takahashi
Kazuo Oota
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP6342981A priority Critical patent/JPS57180248A/en
Publication of JPS57180248A publication Critical patent/JPS57180248A/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
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/04—Arrangements for detecting or preventing errors in the information received by diversity reception using frequency diversity

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Radio Transmission System (AREA)

Abstract

PURPOSE:To keep stable data communication without effect of noise, by frequency-dividing a transmission data into a plurality and processing the data with phase shift suitably, in a system selecting a sampling data for reception data. CONSTITUTION:Only the phase of one transmission signal TS2 is delayed by a half bit's share at a delay circuit 110. A transmission signal TS1 and the delayed transmission signal TS2 are respectively frequency-shift-modulated into an analog signal in different frequency band and mixed and superimposed on a commercial power of a distribution line TL. Thus, even if a sampling pulse SP1 samples a data A of a demodulation signal FSD1 in error, the sampling pulse SP2 samples the data A of the demodulation signal FSD2 at a correct part without external disturbance to reproduce correct data.
JP6342981A 1981-04-28 1981-04-28 Data communication system Pending JPS57180248A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6342981A JPS57180248A (en) 1981-04-28 1981-04-28 Data communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6342981A JPS57180248A (en) 1981-04-28 1981-04-28 Data communication system

Publications (1)

Publication Number Publication Date
JPS57180248A true JPS57180248A (en) 1982-11-06

Family

ID=13229019

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6342981A Pending JPS57180248A (en) 1981-04-28 1981-04-28 Data communication system

Country Status (1)

Country Link
JP (1) JPS57180248A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6751262B1 (en) 1999-01-07 2004-06-15 Polytrax Information Technology Akgiengesellschaft Data transmission method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6751262B1 (en) 1999-01-07 2004-06-15 Polytrax Information Technology Akgiengesellschaft Data transmission method

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