BR7507723A - MULTI-MODE MODULATOR, MULTI-LINE USING BANDWIDTH REDUCTION FOR DIGITAL FSK AND DPSK MODULATION - Google Patents

MULTI-MODE MODULATOR, MULTI-LINE USING BANDWIDTH REDUCTION FOR DIGITAL FSK AND DPSK MODULATION

Info

Publication number
BR7507723A
BR7507723A BR7507723A BR7507723A BR7507723A BR 7507723 A BR7507723 A BR 7507723A BR 7507723 A BR7507723 A BR 7507723A BR 7507723 A BR7507723 A BR 7507723A BR 7507723 A BR7507723 A BR 7507723A
Authority
BR
Brazil
Prior art keywords
line
bandwidth reduction
dpsk modulation
mode modulator
digital fsk
Prior art date
Application number
BR7507723A
Other languages
Portuguese (pt)
Inventor
G Jones
Original Assignee
Ibm
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
Priority claimed from US05/525,699 external-priority patent/US3958191A/en
Application filed by Ibm filed Critical Ibm
Publication of BR7507723A publication Critical patent/BR7507723A/en

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
    • H04L27/122—Modulator circuits; Transmitter circuits using digital generation of carrier signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0008—Modulated-carrier systems arrangements for allowing a transmitter or receiver to use more than one type of modulation
    • 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
    • H04L5/02—Channels characterised by the type of signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
BR7507723A 1974-11-21 1975-11-21 MULTI-MODE MODULATOR, MULTI-LINE USING BANDWIDTH REDUCTION FOR DIGITAL FSK AND DPSK MODULATION BR7507723A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/525,699 US3958191A (en) 1974-11-21 1974-11-21 Multi-line, multi-mode modulator using bandwidth reduction for digital fsk and dpsk modulation

Publications (1)

Publication Number Publication Date
BR7507723A true BR7507723A (en) 1976-08-10

Family

ID=24094283

Family Applications (1)

Application Number Title Priority Date Filing Date
BR7507723A BR7507723A (en) 1974-11-21 1975-11-21 MULTI-MODE MODULATOR, MULTI-LINE USING BANDWIDTH REDUCTION FOR DIGITAL FSK AND DPSK MODULATION

Country Status (7)

Country Link
JP (1) JPS5429334B2 (en)
BR (1) BR7507723A (en)
CA (1) CA1079857A (en)
DE (1) DE2542474C2 (en)
FR (1) FR2292372A1 (en)
GB (3) GB1488435A (en)
IT (1) IT1042772B (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1075364A (en) * 1975-11-26 1980-04-08 David N. Sherman Multiport programmable digital data set
US4142245A (en) * 1977-08-22 1979-02-27 Texas Instruments Incorporated Multi-frequency digital wave synthesizer for providing analog output signals
DE2953707A1 (en) * 1979-06-08 1982-02-25 Ericsson Telefon Ab L M CONVERTER INCLUDED IN A PHASE MODULATOR
US4320361A (en) * 1979-07-20 1982-03-16 Marconi Instruments Limited Amplitude and frequency modulators using a switchable component controlled by data signals
FR2477801A1 (en) * 1980-03-05 1981-09-11 Thomson Csf METHOD FOR PHASE MODULATION BY A BINARY SIGNAL AND DEVICE USING THE SAME
AT377462B (en) * 1981-06-20 1985-03-25 Union Carbide Corp METHOD FOR THERMOCHEMICALLY FLAMEING A METAL WORKPIECE
GB2116795A (en) * 1982-03-02 1983-09-28 Racal Mesl Microwave Electrical signal generation
GB2160728A (en) * 1984-06-21 1985-12-24 Motorola Israel Ltd Waveform synthesizer
DE3514664A1 (en) * 1985-04-23 1986-10-30 Josef Dipl.-Ing. Dirr (FH), 8000 München Method for coding data by means of the phase of an alternating current, in particular for telecommunications systems
DE3716060C2 (en) * 1987-05-14 1996-06-13 Daimler Benz Aerospace Ag Modulator for generating a frequency shift keyed RF signal
DE3716054C2 (en) * 1987-05-14 1996-06-13 Daimler Benz Aerospace Ag modulator
US4794621A (en) * 1987-08-26 1988-12-27 Josef Dirr Apparatus for transmitting information by angle modulation
US4757519A (en) * 1987-10-02 1988-07-12 Hewlett-Packard Digital premodulation filter
JPH03253151A (en) * 1990-03-02 1991-11-12 Fujitsu Denso Ltd Frequency shift modulation control system
GB2368244A (en) * 2000-10-10 2002-04-24 Seiko Epson Corp Signal processor with look-up table for modulating data
TWM578052U (en) * 2018-11-14 2019-05-11 國家中山科學研究院 Frequency shift keying modulation and demodulation structure for communication transceiver

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3497625A (en) * 1965-07-15 1970-02-24 Sylvania Electric Prod Digital modulation and demodulation in a communication system
US3633017A (en) * 1970-01-07 1972-01-04 Sperry Rand Corp Digital waveform generator
FR2110845A5 (en) * 1970-10-29 1972-06-02 Ibm France
US3697892A (en) * 1971-02-19 1972-10-10 Bell Telephone Labor Inc Digital frequency-shift modulator using a read-only-memory
FR2208584A5 (en) * 1972-11-29 1974-06-21 Ibm France
US3890581A (en) * 1972-12-27 1975-06-17 Rixon Digital FM (FSK) modulator

Also Published As

Publication number Publication date
CA1079857A (en) 1980-06-17
GB1488434A (en) 1977-10-12
GB1488435A (en) 1977-10-12
IT1042772B (en) 1980-01-30
FR2292372A1 (en) 1976-06-18
DE2542474A1 (en) 1976-05-26
FR2292372B1 (en) 1977-12-16
JPS5429334B2 (en) 1979-09-22
JPS5171767A (en) 1976-06-21
GB1488433A (en) 1977-10-12
DE2542474C2 (en) 1983-02-24

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