JPS56152359A - Orthogonal modulator for fm - Google Patents

Orthogonal modulator for fm

Info

Publication number
JPS56152359A
JPS56152359A JP5437780A JP5437780A JPS56152359A JP S56152359 A JPS56152359 A JP S56152359A JP 5437780 A JP5437780 A JP 5437780A JP 5437780 A JP5437780 A JP 5437780A JP S56152359 A JPS56152359 A JP S56152359A
Authority
JP
Japan
Prior art keywords
circuit
precision
input terminal
stability
output
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
JP5437780A
Other languages
Japanese (ja)
Inventor
Hiroshi Suzuki
Yasushi Yamao
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP5437780A priority Critical patent/JPS56152359A/en
Publication of JPS56152359A publication Critical patent/JPS56152359A/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
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
    • H04L27/12—Modulator circuits; Transmitter circuits

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 improve stability and precision to be used for general purpose, by introducing the constitution divided into a waveform generating circuit and a phase integrating circuit for the orthogonal modulator superior in stability and modulation precision. CONSTITUTION:The binary data code is inputted from input terminal 1, and output data of waveform generating circuit 11 is integrated by integrating circuit 12. Adding circuit 12-1 has one input terminal connected to the output terminal of circuit 11 and has the other input terminal connected to the output terminal of circuit 12-1 through delay circuit 12-2 of internal clock period tau. Since the output of circuit 12 can be regarded as phase components of the complex envelope of the FM modulation wave, the FM modulation wave superior in stability and precision is obtained if complex envelope generating circuit 8 and orthogonal modulating circuit 9 are connected.
JP5437780A 1980-04-25 1980-04-25 Orthogonal modulator for fm Pending JPS56152359A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5437780A JPS56152359A (en) 1980-04-25 1980-04-25 Orthogonal modulator for fm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5437780A JPS56152359A (en) 1980-04-25 1980-04-25 Orthogonal modulator for fm

Publications (1)

Publication Number Publication Date
JPS56152359A true JPS56152359A (en) 1981-11-25

Family

ID=12968980

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5437780A Pending JPS56152359A (en) 1980-04-25 1980-04-25 Orthogonal modulator for fm

Country Status (1)

Country Link
JP (1) JPS56152359A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61263302A (en) * 1985-05-17 1986-11-21 Nippon Telegr & Teleph Corp <Ntt> Digital analog shared orthogonal modulator
JPH0360502A (en) * 1989-07-29 1991-03-15 Sharp Corp Digital fm modulator
US5751198A (en) * 1995-11-24 1998-05-12 Oki Electric Industry Co., Ltd. Angular modulator with a phase variation divided and integrated
JP2007243950A (en) * 2006-03-09 2007-09-20 Princeton Technology Corp Digital gaussian frequency shift keying/frequency shift keying modulation circuit and associated method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61263302A (en) * 1985-05-17 1986-11-21 Nippon Telegr & Teleph Corp <Ntt> Digital analog shared orthogonal modulator
JPH0360502A (en) * 1989-07-29 1991-03-15 Sharp Corp Digital fm modulator
US5751198A (en) * 1995-11-24 1998-05-12 Oki Electric Industry Co., Ltd. Angular modulator with a phase variation divided and integrated
JP2007243950A (en) * 2006-03-09 2007-09-20 Princeton Technology Corp Digital gaussian frequency shift keying/frequency shift keying modulation circuit and associated method
US7933358B2 (en) 2006-03-09 2011-04-26 Princeton Technology Corporation GFSK/FSK modulation circuit and related method implemented in a digital manner

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