DK368082A - Fremgangsmaade og apparat til demodulering af differentieltkodede fasemodulerede datatransmissioner - Google Patents

Fremgangsmaade og apparat til demodulering af differentieltkodede fasemodulerede datatransmissioner Download PDF

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Publication number
DK368082A
DK368082A DK368082A DK368082A DK368082A DK 368082 A DK368082 A DK 368082A DK 368082 A DK368082 A DK 368082A DK 368082 A DK368082 A DK 368082A DK 368082 A DK368082 A DK 368082A
Authority
DK
Denmark
Prior art keywords
dibits
dibit clock
dibit
clock
phase
Prior art date
Application number
DK368082A
Other languages
Danish (da)
English (en)
Inventor
H V Driest
Original Assignee
Ncr Co
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 Ncr Co filed Critical Ncr Co
Publication of DK368082A publication Critical patent/DK368082A/da

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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
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/227—Demodulator circuits; Receiver circuits using coherent demodulation
    • H04L27/2271—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals
    • H04L27/2273—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals associated with quadrature demodulation, e.g. Costas loop

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Optical Communication System (AREA)
  • Amplifiers (AREA)
DK368082A 1980-12-18 1982-08-17 Fremgangsmaade og apparat til demodulering af differentieltkodede fasemodulerede datatransmissioner DK368082A (da)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/217,942 US4362997A (en) 1980-12-18 1980-12-18 Quadriphase differential demodulator
PCT/US1981/001677 WO1982002131A1 (en) 1980-12-18 1981-12-16 Method and apparatus for demodulating differentially encoded phase modulated data transmissions

Publications (1)

Publication Number Publication Date
DK368082A true DK368082A (da) 1982-08-17

Family

ID=22813113

Family Applications (1)

Application Number Title Priority Date Filing Date
DK368082A DK368082A (da) 1980-12-18 1982-08-17 Fremgangsmaade og apparat til demodulering af differentieltkodede fasemodulerede datatransmissioner

Country Status (10)

Country Link
US (1) US4362997A (enExample)
EP (1) EP0066622B1 (enExample)
JP (1) JPS57501987A (enExample)
AT (1) ATE9125T1 (enExample)
AU (1) AU539593B2 (enExample)
CA (1) CA1179744A (enExample)
DE (2) DE3165718D1 (enExample)
DK (1) DK368082A (enExample)
WO (1) WO1982002131A1 (enExample)
ZA (1) ZA818558B (enExample)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4573166A (en) * 1983-06-24 1986-02-25 Wolfdata, Inc. Digital modem with plural microprocessors
GB2209648B (en) * 1987-09-10 1991-10-23 Ncr Co Modem communication system having main and secondary channels
GB8800739D0 (en) * 1988-01-13 1988-02-10 Ncr Co Multipoint modem system having fast synchronization
GB8800740D0 (en) * 1988-01-13 1988-02-10 Ncr Co Data modem receiver
GB8805767D0 (en) * 1988-03-10 1988-04-07 Ncr Co Phase perturbation compensation system
JPH0983588A (ja) * 1995-09-18 1997-03-28 Mitsubishi Electric Corp 復調器及び変復調システム及び復調方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4301417A (en) * 1980-03-12 1981-11-17 Ncr Corporation Quadriphase differential demodulator

Also Published As

Publication number Publication date
ATE9125T1 (de) 1984-09-15
AU539593B2 (en) 1984-10-04
EP0066622A4 (en) 1983-03-04
DE3165718D1 (en) 1984-09-27
EP0066622B1 (en) 1984-08-22
JPS57501987A (enExample) 1982-11-04
WO1982002131A1 (en) 1982-06-24
US4362997A (en) 1982-12-07
AU8082982A (en) 1982-07-01
CA1179744A (en) 1984-12-18
EP0066622A1 (en) 1982-12-15
ZA818558B (en) 1982-10-27
DE66622T1 (de) 1983-03-17

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Legal Events

Date Code Title Description
AHB Application shelved due to non-payment