JPS56116336A - Overall duplicate communication system - Google Patents

Overall duplicate communication system

Info

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
Application number
JP2026580A
Other languages
Japanese (ja)
Inventor
Yoshito Desaki
Yasuhiro Sugihara
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP2026580A priority Critical patent/JPS56116336A/en
Publication of JPS56116336A publication Critical patent/JPS56116336A/en
Pending legal-status Critical Current

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.
JP2026580A 1980-02-19 1980-02-19 Overall duplicate communication system Pending JPS56116336A (en)

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)

* Cited by examiner, † Cited by third party
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

Patent Citations (1)

* Cited by examiner, † Cited by third party
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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