BR7507723A - Modulador multi-modo,multi-linha usando reducao de largura de faixa para modulacao fsk digital e dpsk - Google Patents

Modulador multi-modo,multi-linha usando reducao de largura de faixa para modulacao fsk digital e dpsk

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
English (en)
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/pt

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 Modulador multi-modo,multi-linha usando reducao de largura de faixa para modulacao fsk digital e dpsk BR7507723A (pt)

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 (pt) 1976-08-10

Family

ID=24094283

Family Applications (1)

Application Number Title Priority Date Filing Date
BR7507723A BR7507723A (pt) 1974-11-21 1975-11-21 Modulador multi-modo,multi-linha usando reducao de largura de faixa para modulacao fsk digital e dpsk

Country Status (7)

Country Link
JP (1) JPS5429334B2 (enExample)
BR (1) BR7507723A (enExample)
CA (1) CA1079857A (enExample)
DE (1) DE2542474C2 (enExample)
FR (1) FR2292372A1 (enExample)
GB (3) GB1488434A (enExample)
IT (1) IT1042772B (enExample)

Families Citing this family (17)

* 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
GB2071966B (en) * 1979-06-08 1983-10-26 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 (fr) * 1980-03-05 1981-09-11 Thomson Csf Procede de modulation de phase par un signal binaire et dispositif mettant en oeuvre ce procede
AT377462B (de) * 1981-06-20 1985-03-25 Union Carbide Corp Verfahren zum thermochemischen flaemmen eines metallischen werkstueckes
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 (de) * 1985-04-23 1986-10-30 Josef Dipl.-Ing. Dirr (FH), 8000 München Verfahren fuer eine codierung von daten durch die phase eines wechselstromes, insbesondere fuer fernmeldeanlagen
DE3716060C2 (de) * 1987-05-14 1996-06-13 Daimler Benz Aerospace Ag Modulator zur Erzeugung eines frequenzumgetasteten HF-Signals
DE3716054C2 (de) * 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 (ja) * 1990-03-02 1991-11-12 Fujitsu Denso Ltd 周波数シフト変調方法
US5103459B1 (en) * 1990-06-25 1999-07-06 Qualcomm Inc System and method for generating signal waveforms in a cdma cellular telephone system
GB2368244A (en) * 2000-10-10 2002-04-24 Seiko Epson Corp Signal processor with look-up table for modulating data
TWM578052U (zh) * 2018-11-14 2019-05-11 國家中山科學研究院 Frequency shift button modulation and demodulation structure of 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 (enExample) * 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 (enExample) * 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
JPS5171767A (enExample) 1976-06-21
DE2542474C2 (de) 1983-02-24
GB1488434A (en) 1977-10-12
GB1488433A (en) 1977-10-12
FR2292372B1 (enExample) 1977-12-16
DE2542474A1 (de) 1976-05-26
CA1079857A (en) 1980-06-17
IT1042772B (it) 1980-01-30
FR2292372A1 (fr) 1976-06-18
GB1488435A (en) 1977-10-12
JPS5429334B2 (enExample) 1979-09-22

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