FR2376574A1 - Systeme de radiotelephonie - Google Patents

Systeme de radiotelephonie

Info

Publication number
FR2376574A1
FR2376574A1 FR7738247A FR7738247A FR2376574A1 FR 2376574 A1 FR2376574 A1 FR 2376574A1 FR 7738247 A FR7738247 A FR 7738247A FR 7738247 A FR7738247 A FR 7738247A FR 2376574 A1 FR2376574 A1 FR 2376574A1
Authority
FR
France
Prior art keywords
radiotelephony
public
transmission
code
reception
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
FR7738247A
Other languages
English (en)
French (fr)
Other versions
FR2376574B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html
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.)
Siemens Corp
Original Assignee
Siemens Corp
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 Siemens Corp filed Critical Siemens Corp
Publication of FR2376574A1 publication Critical patent/FR2376574A1/fr
Application granted granted Critical
Publication of FR2376574B1 publication Critical patent/FR2376574B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/02—Secret communication by adding a second signal to make the desired signal unintelligible

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
FR7738247A 1976-12-30 1977-12-19 Systeme de radiotelephonie Granted FR2376574A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2659622A DE2659622C2 (de) 1976-12-30 1976-12-30 Funktelefoniesystem

Publications (2)

Publication Number Publication Date
FR2376574A1 true FR2376574A1 (fr) 1978-07-28
FR2376574B1 FR2376574B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1980-08-22

Family

ID=5997076

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7738247A Granted FR2376574A1 (fr) 1976-12-30 1977-12-19 Systeme de radiotelephonie

Country Status (10)

Country Link
JP (1) JPS5826864B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AT (1) AT360593B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1) BE862540A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH (1) CH625650A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2659622C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DK (1) DK148049B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2376574A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1584579A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
IT (1) IT1089194B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (1) NL176823C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2927885A1 (de) * 1979-07-11 1981-01-29 Bosch Gmbh Robert Funkanlage mit einer zentralstation und mehreren, vorzugsweise mobilen sende-/empfangsstationen
DE3150254A1 (de) * 1981-04-13 1983-07-14 Siemens AG, 1000 Berlin und 8000 München Einrichtung zur verschluesselten digitalen informationsuebertragung
US4549308A (en) * 1982-07-12 1985-10-22 At&T Bell Laboratories Secure mobile radio telephony
DE3335672A1 (de) * 1983-09-30 1985-04-04 Siemens AG, 1000 Berlin und 8000 München Verfahren zur verschluesselten nachrichtenuebertragung
DE3402467A1 (de) * 1984-01-25 1985-08-01 Philips Kommunikations Industrie AG, 8500 Nürnberg Gegen leistungserschleichung gesichertes waehlverfahren fuer die teilnehmer eines funknetzes, insbesondere mobilfunknetzes
DE3439159A1 (de) * 1984-01-25 1986-04-30 Philips Kommunikations Industrie AG, 8500 Nürnberg Gegen leistungserschleichung gesichertes waehlverfahren
DE3410936C2 (de) * 1984-03-24 1997-09-18 Philips Patentverwaltung Verfahren zum Erkennen der unerlaubten Benutzung einer, einer beweglichen Funkstation zugeordneten Identifizierung in einem Funkübertragungssystem
DE3420874A1 (de) * 1984-06-05 1985-12-05 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verfahren und anordnung zur kontrolle des netzzugangs in fernmeldenetzen
DE3439120A1 (de) * 1984-10-25 1986-05-07 Philips Kommunikations Industrie AG, 8500 Nürnberg Verfahren zur identifizierung einer teilnehmerstation eines fernmeldenetzes
JPS61199342A (ja) * 1985-02-28 1986-09-03 Tamura Electric Works Ltd コ−ドレス電話装置
DE4242151C1 (de) * 1992-12-14 1994-03-24 Detecon Gmbh Verfahren zur Sicherung eines Mobilfunkgerätes gegen unerlaubte Benutzung
DE4336995A1 (de) * 1993-10-29 1995-05-04 Sel Alcatel Ag Verfahren und Vorrichtung zur Bestimmung der Zuordnung eines Mobilfunkgerätes zu Geräte-Listen

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2220938A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1973-03-09 1974-10-04 Philips Nv

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2220938A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1973-03-09 1974-10-04 Philips Nv

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NV8027/72 *

Also Published As

Publication number Publication date
AT360593B (de) 1981-01-26
IT1089194B (it) 1985-06-18
NL176823C (nl) 1985-06-03
DE2659622C2 (de) 1979-01-04
JPS5826864B2 (ja) 1983-06-06
NL7714545A (nl) 1978-07-04
DK148049B (da) 1985-02-11
NL176823B (nl) 1985-01-02
CH625650A5 (en) 1981-09-30
DK585277A (da) 1978-07-01
GB1584579A (en) 1981-02-11
DE2659622B1 (de) 1978-05-11
JPS5384602A (en) 1978-07-26
BE862540A (fr) 1978-04-14
ATA938977A (de) 1980-06-15
FR2376574B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1980-08-22

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Legal Events

Date Code Title Description
ST Notification of lapse