GB618589A - Improvements in or relating to double-current audio-frequency telegraphic transmission systems - Google Patents

Improvements in or relating to double-current audio-frequency telegraphic transmission systems

Info

Publication number
GB618589A
GB618589A GB16956/45A GB1695645A GB618589A GB 618589 A GB618589 A GB 618589A GB 16956/45 A GB16956/45 A GB 16956/45A GB 1695645 A GB1695645 A GB 1695645A GB 618589 A GB618589 A GB 618589A
Authority
GB
United Kingdom
Prior art keywords
phase
output
modulator
blocking circuit
demodulator
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
GB16956/45A
Other languages
English (en)
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
Publication of GB618589A publication Critical patent/GB618589A/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)
GB16956/45A 1943-03-12 1945-07-03 Improvements in or relating to double-current audio-frequency telegraphic transmission systems Expired GB618589A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
GB618589A true GB618589A (en) 1949-02-24

Family

ID=9390980

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16956/45A Expired GB618589A (en) 1943-03-12 1945-07-03 Improvements in or relating to double-current audio-frequency telegraphic transmission systems

Country Status (5)

Country Link
BE (1) BE454533A (US06573293-20030603-C00184.png)
CH (1) CH256126A (US06573293-20030603-C00184.png)
FR (1) FR895986A (US06573293-20030603-C00184.png)
GB (1) GB618589A (US06573293-20030603-C00184.png)
NL (1) NL61637C (US06573293-20030603-C00184.png)

Also Published As

Publication number Publication date
CH256126A (fr) 1948-07-31
BE454533A (US06573293-20030603-C00184.png)
FR895986A (fr) 1945-02-08
NL61637C (US06573293-20030603-C00184.png)

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