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GB1087614A - Improvements in or relating to secret radio and like transmitters and transmission systems - Google Patents

Improvements in or relating to secret radio and like transmitters and transmission systems

Info

Publication number
GB1087614A
GB1087614A GB4510463A GB4510463A GB1087614A GB 1087614 A GB1087614 A GB 1087614A GB 4510463 A GB4510463 A GB 4510463A GB 4510463 A GB4510463 A GB 4510463A GB 1087614 A GB1087614 A GB 1087614A
Authority
GB
United Kingdom
Prior art keywords
noise
pulse
transmitters
relating
secret
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
GB4510463A
Inventor
Oswald Edward Keall
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconi Co 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 Marconi Co Ltd filed Critical Marconi Co Ltd
Priority to GB4510463A priority Critical patent/GB1087614A/en
Publication of GB1087614A publication Critical patent/GB1087614A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/08—Systems for measuring distance only
    • G01S13/10—Systems for measuring distance only using transmission of interrupted, pulse modulated waves
    • G01S13/106—Systems for measuring distance only using transmission of interrupted, pulse modulated waves using transmission of pulses having some particular characteristics
    • 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
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/08—Systems for measuring distance only
    • G01S13/10—Systems for measuring distance only using transmission of interrupted, pulse modulated waves
    • G01S13/26—Systems for measuring distance only using transmission of interrupted, pulse modulated waves wherein the transmitted pulses use a frequency- or phase-modulated carrier wave
    • G01S13/28—Systems for measuring distance only using transmission of interrupted, pulse modulated waves wherein the transmitted pulses use a frequency- or phase-modulated carrier wave with time compression of received pulses
    • G01S13/284—Systems for measuring distance only using transmission of interrupted, pulse modulated waves wherein the transmitted pulses use a frequency- or phase-modulated carrier wave with time compression of received pulses using coded pulses
    • G01S13/286—Systems for measuring distance only using transmission of interrupted, pulse modulated waves wherein the transmitted pulses use a frequency- or phase-modulated carrier wave with time compression of received pulses using coded pulses frequency shift keyed
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

1,087,614. Pulse radar; radio signalling. MARCONI CO. Ltd. May 19, 1964 [Nov. 14, 1963], No. 45104/63. Headings H4D and H4L. In a pulsed, frequency-modulated radar system, the transmission is rendered secret by means of superimposed random noise. A compression type Gaussian weighting filter at the receiver converts each long input pulse into a short duration pulse. The noise, having a random frequency distribution is attenuated at its peak valves by the filter and a high signal to noise ratio is produced. On the other hand, an unauthorized receiver receives the pulses together with the superimposed noise unattenuated.
GB4510463A 1963-11-14 1963-11-14 Improvements in or relating to secret radio and like transmitters and transmission systems Expired GB1087614A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4510463A GB1087614A (en) 1963-11-14 1963-11-14 Improvements in or relating to secret radio and like transmitters and transmission systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4510463A GB1087614A (en) 1963-11-14 1963-11-14 Improvements in or relating to secret radio and like transmitters and transmission systems

Publications (1)

Publication Number Publication Date
GB1087614A true GB1087614A (en) 1967-10-18

Family

ID=10435897

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4510463A Expired GB1087614A (en) 1963-11-14 1963-11-14 Improvements in or relating to secret radio and like transmitters and transmission systems

Country Status (1)

Country Link
GB (1) GB1087614A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2043665A1 (en) * 1969-05-26 1971-02-19 Int Standard Electric Corp
RU1841337C (en) * 1977-03-23 2022-10-25 Акционерное общество "Центральный научно-исследовательский радиотехнический институт имени академика А.И. Берга" The method of radio protection of groups of aircraft

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2043665A1 (en) * 1969-05-26 1971-02-19 Int Standard Electric Corp
RU1841337C (en) * 1977-03-23 2022-10-25 Акционерное общество "Центральный научно-исследовательский радиотехнический институт имени академика А.И. Берга" The method of radio protection of groups of aircraft

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