JPS57180248A - Data communication system - Google Patents
Data communication systemInfo
- 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
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.
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6751262B1 (en) | 1999-01-07 | 2004-06-15 | Polytrax Information Technology Akgiengesellschaft | Data transmission method |
-
1981
- 1981-04-28 JP JP6342981A patent/JPS57180248A/en active Pending
Cited By (1)
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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