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 systemsInfo
- 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
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.
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)
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 |
-
1963
- 1963-11-14 GB GB4510463A patent/GB1087614A/en not_active Expired
Cited By (2)
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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