FR2159375A1 - - Google Patents

Info

Publication number
FR2159375A1
FR2159375A1 FR7239554A FR7239554A FR2159375A1 FR 2159375 A1 FR2159375 A1 FR 2159375A1 FR 7239554 A FR7239554 A FR 7239554A FR 7239554 A FR7239554 A FR 7239554A FR 2159375 A1 FR2159375 A1 FR 2159375A1
Authority
FR
France
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
FR7239554A
Other languages
French (fr)
Other versions
FR2159375B1 (enrdf_load_stackoverflow
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.)
Allard Way Holdings Ltd
Original Assignee
Elliott Brothers London Ltd
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 Elliott Brothers London Ltd filed Critical Elliott Brothers London Ltd
Publication of FR2159375A1 publication Critical patent/FR2159375A1/fr
Application granted granted Critical
Publication of FR2159375B1 publication Critical patent/FR2159375B1/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/02—Secret communication by adding a second signal to make the desired signal unintelligible
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/76—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted
    • G01S13/78—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted discriminating between different kinds of targets, e.g. IFF-radar, i.e. identification of friend or foe
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/36—Means for anti-jamming, e.g. ECCM, i.e. electronic counter-counter measures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/10—Secret communication by using two signals transmitted simultaneously or successively
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/80—Jamming or countermeasure characterized by its function
    • H04K3/82—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection
    • H04K3/827—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection using characteristics of target signal or of transmission, e.g. using direct sequence spread spectrum or fast frequency hopping
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K2203/00—Jamming of communication; Countermeasures
    • H04K2203/30—Jamming or countermeasure characterized by the infrastructure components
    • H04K2203/32—Jamming or countermeasure characterized by the infrastructure components including a particular configuration of antennas

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar Systems Or Details Thereof (AREA)
FR7239554A 1971-11-09 1972-11-08 Expired FR2159375B1 (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5204771 1971-11-09

Publications (2)

Publication Number Publication Date
FR2159375A1 true FR2159375A1 (enrdf_load_stackoverflow) 1973-06-22
FR2159375B1 FR2159375B1 (enrdf_load_stackoverflow) 1976-06-04

Family

ID=10462445

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7239554A Expired FR2159375B1 (enrdf_load_stackoverflow) 1971-11-09 1972-11-08

Country Status (3)

Country Link
DE (1) DE2254785A1 (enrdf_load_stackoverflow)
FR (1) FR2159375B1 (enrdf_load_stackoverflow)
IT (1) IT991535B (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2397642A1 (fr) * 1976-05-20 1979-02-09 Messerschmitt Boelkow Blohm Procede et dispositif destines a empecher le brouillage intentionnel des systemes de reperage et de transmission

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3248544C2 (de) * 1982-12-29 1984-11-22 Siemens AG, 1000 Berlin und 8000 München System zur Informationsübertragung mittels Infrarotstrahlung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2426992A (en) * 1942-05-27 1947-09-09 Sperry Gyroscope Co Inc Glide path transmitter
US2463502A (en) * 1942-05-21 1949-03-08 Tung Sol Lamp Works Inc Method and system of secret communication
US2476337A (en) * 1943-01-22 1949-07-19 Sperry Corp Secret radio communication
US2792493A (en) * 1950-01-05 1957-05-14 Westinghouse Electric Corp Secrecy transmission system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2463502A (en) * 1942-05-21 1949-03-08 Tung Sol Lamp Works Inc Method and system of secret communication
US2426992A (en) * 1942-05-27 1947-09-09 Sperry Gyroscope Co Inc Glide path transmitter
US2476337A (en) * 1943-01-22 1949-07-19 Sperry Corp Secret radio communication
US2792493A (en) * 1950-01-05 1957-05-14 Westinghouse Electric Corp Secrecy transmission system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2397642A1 (fr) * 1976-05-20 1979-02-09 Messerschmitt Boelkow Blohm Procede et dispositif destines a empecher le brouillage intentionnel des systemes de reperage et de transmission

Also Published As

Publication number Publication date
IT991535B (it) 1975-08-30
DE2254785A1 (de) 1973-05-17
FR2159375B1 (enrdf_load_stackoverflow) 1976-06-04

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Legal Events

Date Code Title Description
ST Notification of lapse