FR2371099A1 - TELEGRAPHIC SIGNAL ELEMENT - Google Patents

TELEGRAPHIC SIGNAL ELEMENT

Info

Publication number
FR2371099A1
FR2371099A1 FR7734004A FR7734004A FR2371099A1 FR 2371099 A1 FR2371099 A1 FR 2371099A1 FR 7734004 A FR7734004 A FR 7734004A FR 7734004 A FR7734004 A FR 7734004A FR 2371099 A1 FR2371099 A1 FR 2371099A1
Authority
FR
France
Prior art keywords
signal element
alpha
telegraphic signal
telegraphic
passband
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.)
Granted
Application number
FR7734004A
Other languages
French (fr)
Other versions
FR2371099B1 (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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of FR2371099A1 publication Critical patent/FR2371099A1/en
Application granted granted Critical
Publication of FR2371099B1 publication Critical patent/FR2371099B1/fr
Granted 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
    • H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

Elément de signal télégraphique pour modulation à bande latérale résiduelle et suppression de porteuse. L'élément de signal présente une courbe en cos**2 dans le domaine des fréquences. Le spectre est décalé de alpha B/2 vers les fréquences positives (B étant la bande passante - 6 dB de l'élement de signal) et le paramètre alpha est égal à 0,7 afin de minimiser la modulation d'amplitude résiduelle.Telegraph signal element for residual sideband modulation and carrier suppression. The signal element has a cos ** 2 curve in the frequency domain. The spectrum is shifted from alpha B / 2 to positive frequencies (B being the passband - 6 dB of the signal element) and the alpha parameter is equal to 0.7 in order to minimize residual amplitude modulation.

FR7734004A 1976-11-11 1977-11-10 TELEGRAPHIC SIGNAL ELEMENT Granted FR2371099A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762651450 DE2651450C2 (en) 1976-11-11 1976-11-11 Elementary symbols for telegraphy processes

Publications (2)

Publication Number Publication Date
FR2371099A1 true FR2371099A1 (en) 1978-06-09
FR2371099B1 FR2371099B1 (en) 1983-03-25

Family

ID=5992901

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7734004A Granted FR2371099A1 (en) 1976-11-11 1977-11-10 TELEGRAPHIC SIGNAL ELEMENT

Country Status (3)

Country Link
DE (1) DE2651450C2 (en)
FR (1) FR2371099A1 (en)
GB (1) GB1581294A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3124678A (en) * 1964-03-10 Agent
US3443229A (en) * 1966-04-13 1969-05-06 Bell Telephone Labor Inc Quadrature-carrier vestigial-sideband data transmission

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1353019A (en) * 1970-04-21 1974-05-15 Xerox Corp Channel-shaping filter
US3835391A (en) * 1971-05-21 1974-09-10 Ibm Vestigial sideband signal generator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3124678A (en) * 1964-03-10 Agent
US3443229A (en) * 1966-04-13 1969-05-06 Bell Telephone Labor Inc Quadrature-carrier vestigial-sideband data transmission

Also Published As

Publication number Publication date
DE2651450A1 (en) 1978-05-18
DE2651450C2 (en) 1985-03-14
FR2371099B1 (en) 1983-03-25
GB1581294A (en) 1980-12-10

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Legal Events

Date Code Title Description
DL Decision of the director general to leave to make available licences of right
ST Notification of lapse