CA1244886A - Systeme de communication sur - Google Patents

Systeme de communication sur

Info

Publication number
CA1244886A
CA1244886A CA000486105A CA486105A CA1244886A CA 1244886 A CA1244886 A CA 1244886A CA 000486105 A CA000486105 A CA 000486105A CA 486105 A CA486105 A CA 486105A CA 1244886 A CA1244886 A CA 1244886A
Authority
CA
Canada
Prior art keywords
frequency
receiver
information signal
transmitter
signal
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
CA000486105A
Other languages
English (en)
Inventor
William N. Waggener
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.)
Fairchild Weston Systems Inc
Original Assignee
Fairchild Weston Systems Inc
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 Fairchild Weston Systems Inc filed Critical Fairchild Weston Systems Inc
Application granted granted Critical
Publication of CA1244886A publication Critical patent/CA1244886A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/003—Secret communication by varying carrier frequency at or within predetermined or random intervals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Selective Calling Equipment (AREA)
  • Communication Control (AREA)
CA000486105A 1984-06-29 1985-06-28 Systeme de communication sur Expired CA1244886A (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US62588584A 1984-06-29 1984-06-29
US625,885 1984-06-29

Publications (1)

Publication Number Publication Date
CA1244886A true CA1244886A (fr) 1988-11-15

Family

ID=24508031

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000486105A Expired CA1244886A (fr) 1984-06-29 1985-06-28 Systeme de communication sur

Country Status (3)

Country Link
EP (1) EP0167442A3 (fr)
CA (1) CA1244886A (fr)
IL (1) IL75670A (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL82561A (en) * 1986-05-27 1991-12-15 Fairchild Weston Systems Inc Secure communication system for multiple remote units
AU6978794A (en) * 1993-06-23 1995-01-17 Colebrand Limited Identification beacon
GB2307624B (en) * 1995-11-23 2000-02-09 Motorola Israel Ltd Data transmission method for a channel hopping communication system
GB2456534A (en) * 2008-01-17 2009-07-22 Vodafone Plc Changing communication channels for secure encrypted communications
US8792640B2 (en) 2008-01-29 2014-07-29 Sony Corporation Systems and methods for securing a digital communications link
US8457175B2 (en) 2008-01-29 2013-06-04 Sony Corporation Systems and methods for securing a digital communications link
US8319615B2 (en) 2009-12-21 2012-11-27 Continental Automotive Systems, Inc. Apparatus and method for detecting jamming of communications
US8896431B2 (en) 2009-12-21 2014-11-25 Continental Automotive Systems, Inc. Apparatus and method for compromised vehicle tracking
US10027682B2 (en) 2009-12-21 2018-07-17 Continental Automotive Systems, Inc. Apparatus and method for detecting a cloned base station
US8320872B2 (en) 2009-12-21 2012-11-27 Continental Automotive Systems, Inc. Apparatus and method for broadcasting the detection of RF jammer presence
US8639209B2 (en) 2009-12-21 2014-01-28 Continental Automotive Systems, Inc. Apparatus and method for detecting a cloned base station
US9102293B2 (en) 2009-12-21 2015-08-11 Continental Automotive Systems, Inc. Apparatus and method for reducing false alarms in stolen vehicle tracking
US8611847B2 (en) 2009-12-21 2013-12-17 Continental Automotive Systems, Inc. Apparatus and method for detecting communication interference
US8175573B2 (en) * 2009-12-21 2012-05-08 Continental Automotive Systems, Inc. Apparatus and method for maintaining communications with a vehicle in the presence of jamming
US8159336B2 (en) 2009-12-21 2012-04-17 Continental Automotive Systems Us, Inc. Apparatus and method for maintaining communication with a stolen vehicle tracking device
US8884821B2 (en) 2009-12-21 2014-11-11 Continental Automotive Systems, Inc. Apparatus and method for determining vehicle location
GB2485142A (en) 2010-10-27 2012-05-09 Nds Ltd Secure broadcast/multicast of media content
US9031538B2 (en) 2012-02-16 2015-05-12 Continental Automotive Systems, Inc. Method and apparatus to determine if a cellular jamming signal is malicious or non-malicious based on received signal strength
US9119064B2 (en) * 2013-11-20 2015-08-25 At&T Intellectual Property I, L.P. Method and apparatus for providing broadcast channel encryption to enhance cellular network security

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4005428A (en) * 1975-05-15 1977-01-25 Sound Technology, Inc. Secure remote control communication systems
JPS6036143B2 (ja) * 1978-08-24 1985-08-19 松島工業株式会社 通信方式
IL63102A (en) * 1980-06-19 1984-03-30 Oak Industries Inc System for enciphering messages
DE3230726A1 (de) * 1982-08-18 1984-02-23 Siemens AG, 1000 Berlin und 8000 München Verfahren zur stoerresistenten funkuebertragung auf kurzwelle

Also Published As

Publication number Publication date
IL75670A (en) 1989-06-30
EP0167442A3 (fr) 1986-12-30
EP0167442A2 (fr) 1986-01-08

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Legal Events

Date Code Title Description
MKEX Expiry