FR895986A - Improvements to dual-stream voice-frequency telegraph transmission systems - Google Patents

Improvements to dual-stream voice-frequency telegraph transmission systems

Info

Publication number
FR895986A
FR895986A FR895986DA FR895986A FR 895986 A FR895986 A FR 895986A FR 895986D A FR895986D A FR 895986DA FR 895986 A FR895986 A FR 895986A
Authority
FR
France
Prior art keywords
dual
transmission systems
telegraph transmission
stream voice
frequency telegraph
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.)
Expired
Application number
Other languages
French (fr)
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.)
Alcatel Lucent SAS
Original Assignee
Compagnie Generale dElectricite SA
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 Compagnie Generale dElectricite SA filed Critical Compagnie Generale dElectricite SA
Application granted granted Critical
Publication of FR895986A publication Critical patent/FR895986A/en
Expired 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
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/227—Demodulator circuits; Receiver circuits using coherent demodulation
    • H04L27/2275—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses the received modulated signals
    • 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
    • H04L27/20—Modulator circuits; Transmitter circuits
    • H04L27/2032—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner
    • H04L27/2035—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using a single or unspecified number of carriers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
FR895986D 1943-03-12 1943-03-12 Improvements to dual-stream voice-frequency telegraph transmission systems Expired FR895986A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR895986T 1943-03-12

Publications (1)

Publication Number Publication Date
FR895986A true FR895986A (en) 1945-02-08

Family

ID=9390980

Family Applications (1)

Application Number Title Priority Date Filing Date
FR895986D Expired FR895986A (en) 1943-03-12 1943-03-12 Improvements to dual-stream voice-frequency telegraph transmission systems

Country Status (5)

Country Link
BE (1) BE454533A (en)
CH (1) CH256126A (en)
FR (1) FR895986A (en)
GB (1) GB618589A (en)
NL (1) NL61637C (en)

Also Published As

Publication number Publication date
CH256126A (en) 1948-07-31
BE454533A (en)
NL61637C (en)
GB618589A (en) 1949-02-24

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