JPS55150646A - Radio data transmission system - Google Patents

Radio data transmission system

Info

Publication number
JPS55150646A
JPS55150646A JP5890879A JP5890879A JPS55150646A JP S55150646 A JPS55150646 A JP S55150646A JP 5890879 A JP5890879 A JP 5890879A JP 5890879 A JP5890879 A JP 5890879A JP S55150646 A JPS55150646 A JP S55150646A
Authority
JP
Japan
Prior art keywords
wave
antenna
transmitted
input
data signal
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
JP5890879A
Other languages
Japanese (ja)
Inventor
Ryuhei Fujiwara
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP5890879A priority Critical patent/JPS55150646A/en
Publication of JPS55150646A publication Critical patent/JPS55150646A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying

Landscapes

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

Abstract

PURPOSE:To transmit a waveform near the square wave to be transmitted with the maximum modulation degree to secure always the maximum signal level, by utilizing the instantaneous deviation control circuit equipped in the PM transmitter. CONSTITUTION:The data signal input from input terminal 1 is amplified sufficiently by amplifier 2 and becomes always a triangular wave at output end 4 of instantaneous deviation control IDC circuit 3 even for level fluctuation and passes through splatter filter 5 and is modulated with an allowable maximum modulation degree by PM modulator 6 and is transmitted from antenna 7. Meanwhile, this radio wave input from antenna 8 is received by FM receiver 9 and is detected as a waveform near the square wave, which includes fundamental wave components most out of waveforms of the same peak-to-peak, and is output as a data signal through BPF11.
JP5890879A 1979-05-14 1979-05-14 Radio data transmission system Pending JPS55150646A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5890879A JPS55150646A (en) 1979-05-14 1979-05-14 Radio data transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5890879A JPS55150646A (en) 1979-05-14 1979-05-14 Radio data transmission system

Publications (1)

Publication Number Publication Date
JPS55150646A true JPS55150646A (en) 1980-11-22

Family

ID=13097903

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5890879A Pending JPS55150646A (en) 1979-05-14 1979-05-14 Radio data transmission system

Country Status (1)

Country Link
JP (1) JPS55150646A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61263329A (en) * 1985-05-17 1986-11-21 Matsushita Electric Ind Co Ltd Radio transmitter-receiver
JPS61265930A (en) * 1985-05-21 1986-11-25 Matsushita Electric Ind Co Ltd Radio transmission and reception equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61263329A (en) * 1985-05-17 1986-11-21 Matsushita Electric Ind Co Ltd Radio transmitter-receiver
JPS61265930A (en) * 1985-05-21 1986-11-25 Matsushita Electric Ind Co Ltd Radio transmission and reception equipment

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