JPS56116336A - Overall duplicate communication system - Google Patents
Overall duplicate communication systemInfo
- Publication number
- JPS56116336A JPS56116336A JP2026580A JP2026580A JPS56116336A JP S56116336 A JPS56116336 A JP S56116336A JP 2026580 A JP2026580 A JP 2026580A JP 2026580 A JP2026580 A JP 2026580A JP S56116336 A JPS56116336 A JP S56116336A
- Authority
- JP
- Japan
- Prior art keywords
- line
- enters
- hybrid circuit
- carrier
- modulated
- 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
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
- H04L5/143—Two-way operation using the same type of signal, i.e. duplex for modulated signals
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
- Bidirectional Digital Transmission (AREA)
Abstract
PURPOSE:To enable duplicate communication without increasing the line and spreading the band, by forming transmission waves each other transmitted from the both bidirectional communication lines with the same carrier and different modulation axes by 90 deg.. CONSTITUTION:The transmission data input to an input terminal 1 is modulated and added with a pilot signal, and enters a hybrid circuit 4 and is delivered to a line 5. The signal at the reception side from the line 5 enters a demodulator 8 via the hybrid circuit 4 and the demodulated reception data is fed to the output terminal through the synchronous detection by using carrier phase-shifted at a 90 deg. phase shifter 9. At the reception side, the transmission data is inputted to an input terminal 19 and enters a modulator 18, and it is modulated with the modulation carrier phase-shifted by 90 deg. for the carrier played back from the pilot signal and transmitted to the line 10 via a hybrid circuit 11. Two apparent communication lines have different modulation axes by 90 deg., and they do not give any interference, allowing independent overall duplicate communication.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2026580A JPS56116336A (en) | 1980-02-19 | 1980-02-19 | Overall duplicate communication system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2026580A JPS56116336A (en) | 1980-02-19 | 1980-02-19 | Overall duplicate communication system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56116336A true JPS56116336A (en) | 1981-09-12 |
Family
ID=12022360
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2026580A Pending JPS56116336A (en) | 1980-02-19 | 1980-02-19 | Overall duplicate communication system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56116336A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54157003A (en) * | 1978-05-31 | 1979-12-11 | Nippon Telegr & Teleph Corp <Ntt> | Polarization multiplex two-way optical transmission system |
-
1980
- 1980-02-19 JP JP2026580A patent/JPS56116336A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54157003A (en) * | 1978-05-31 | 1979-12-11 | Nippon Telegr & Teleph Corp <Ntt> | Polarization multiplex two-way optical transmission system |
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