GB1100157A - Improvements relating to pulse radar systems - Google Patents

Improvements relating to pulse radar systems

Info

Publication number
GB1100157A
GB1100157A GB2488965A GB2488965A GB1100157A GB 1100157 A GB1100157 A GB 1100157A GB 2488965 A GB2488965 A GB 2488965A GB 2488965 A GB2488965 A GB 2488965A GB 1100157 A GB1100157 A GB 1100157A
Authority
GB
United Kingdom
Prior art keywords
quantum
time
signals
clutter
quantized
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
GB2488965A
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.)
Electronique & Radio Ind
Original Assignee
Electronique & Radio Ind
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 Electronique & Radio Ind filed Critical Electronique & Radio Ind
Publication of GB1100157A publication Critical patent/GB1100157A/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
    • 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
    • G01S7/28—Details of pulse systems
    • G01S7/285—Receivers
    • G01S7/292—Extracting wanted echo-signals
    • G01S7/2923—Extracting wanted echo-signals based on data belonging to a number of consecutive radar periods
    • 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
    • G01S13/50—Systems of measurement based on relative movement of target
    • G01S13/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
    • G01S13/64—Velocity measuring systems using range gates
    • 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
    • G01S7/28—Details of pulse systems
    • G01S7/285—Receivers
    • G01S7/292—Extracting wanted echo-signals
    • G01S7/2921—Extracting wanted echo-signals based on data belonging to one radar period
    • 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

1,100,157. Pulse radar. SOCIETE NOUVELLE D'ELECTRONIQUE ET DE LA RADIO-INDUSTRIE. 11 June, 1965 [16 June, 1964], No. 24889/65. Heading H4D. In an arrangement for deciding whether a pulse radar echo signal in a range-time quantum Q is in a clutter zone, the video echo train is amplitude-quantized in a binary manner, the ensuing " 1 " signals are quantized in duration and time-position, the signals thus quantized are stored, and the quantized " 1 " signals from n time quanta preceding quantum Q in a current pulse repetition period (p.r.p.) are utilized together with similar signals in n time quanta following quantum Q in the previous p.r.p. are utilized to make the decision. The signal in quantum Q itself may also be used. In a store 12 each ferrite toroid corresponds to a time quantum; writing-in and reading-out from the store are controlled by an addressing circuit 13 actuated by pulses. Read-out is as described in Specification 1,071,692 such as to feed into a shift register 16 the signals from the " previous " p.r.p. Another shift register 17 is fed directly from the duration and time-position quantizer 10. Parallel read-out from the shift registers enables a logic unit 18 to totalize the " 1 " data in 2n time quanta and this total is compared with a predetermined threshold; if exceeded, and if the further criterion that there is a " 1 " signal in one of the two time quanta adjacent to quantum. Q is met, the input video signal is blocked from the utilization circuit or the latter is fed from a logarithmic receiver. The P.P.I. may be marked to indicate the clutter zones, Fig. 2 (not shown), and the logic unit decision may be cancelled manually over selectable zones. A decision may be taken as regards azimuth: the clutter zone positions found during an aerial revolution are stored and the clutter sector positions are maintained even if during the next aerial revolution a clutter decision does not arise in a p.r.p. in a particular direction. The invention is stated to be particularly useful when echo amplitude may vary from one p.r.p. to the next as in a radar utilizing random carrier frequencies.
GB2488965A 1964-06-16 1965-06-11 Improvements relating to pulse radar systems Expired GB1100157A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR978445A FR1407165A (en) 1964-06-16 1964-06-16 Improvements to devices eliminating dense areas

Publications (1)

Publication Number Publication Date
GB1100157A true GB1100157A (en) 1968-01-24

Family

ID=8832488

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2488965A Expired GB1100157A (en) 1964-06-16 1965-06-11 Improvements relating to pulse radar systems

Country Status (6)

Country Link
CH (1) CH436404A (en)
DE (1) DE1279132B (en)
FR (1) FR1407165A (en)
GB (1) GB1100157A (en)
NL (1) NL154834B (en)
SE (1) SE344639B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0014495A1 (en) * 1979-02-09 1980-08-20 Hollandse Signaalapparaten B.V. Video extractor for use in pulse radar apparatus

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1591294B1 (en) * 1966-11-01 1970-08-27 Mitsubishi Electric Corp Method for two- or three-dimensional correlation of radar video quanta as well as means for carrying out the same
US3611369A (en) * 1969-05-27 1971-10-05 Burroughs Corp Quantizer system with adaptive automatic clutter elimination
NO136812C (en) * 1969-12-15 1977-11-09 Iotron Corp M} L EVALUATOR.
DE3046010C2 (en) * 1980-12-05 1982-11-04 Siemens AG, 1000 Berlin und 8000 München Radar device for monitoring an airspace
DE3112323A1 (en) * 1981-03-28 1982-10-07 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Method for adaptive threshold value definition for radar signals
CH681257A5 (en) * 1990-09-18 1993-02-15 Jfs Electronic Sturtzel & Co A

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1365972A (en) * 1963-02-19 1964-07-10 Thomson Houston Comp Francaise Improvements to pulsed radiodetection methods with elimination of long echoes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0014495A1 (en) * 1979-02-09 1980-08-20 Hollandse Signaalapparaten B.V. Video extractor for use in pulse radar apparatus

Also Published As

Publication number Publication date
SE344639B (en) 1972-04-24
DE1279132B (en) 1968-10-03
FR1407165A (en) 1965-07-30
CH436404A (en) 1967-05-31
NL154834B (en) 1977-10-17
NL6507612A (en) 1965-12-17

Similar Documents

Publication Publication Date Title
GB1372470A (en) Radar systems
GB1058823A (en) Radar target detection installation
US3614316A (en) Secure communication system
GB1100157A (en) Improvements relating to pulse radar systems
GB1278451A (en) Discriminating signaling system
GB1300157A (en) Doppler correlation radar system
GB1264888A (en)
US2777059A (en) Echo suppression beacons
US3368151A (en) Continuous antenna selection system
US4510497A (en) Ramark beacon apparatus
GB1058667A (en) Improvements in pulse radar systems
GB1220321A (en) Improvements to radio-detection methods
US3646556A (en) Reflected iff interrogation rejector
US4034371A (en) Apparatus and methods for differentiating between synchronous and asynchronous response signals in secondary radar devices
GB1113022A (en) Improvements to pulse-doppler radars
GB1055417A (en) Synchronous time interval detector
GB1156183A (en) Improvements in Systems for Transmitting Digital Information Signals and for Distance Measurement
US3944965A (en) Overflow threshold control for sonar
US3154783A (en) Pulse storage system
GB1218341A (en) Pulse radar system
US4586046A (en) Automatic reprogramming means for countermeasures system
GB1390824A (en) Echo-sounding device
GB1114531A (en) Improvements relating to radar
GB1221802A (en) Means and techniques useful in blanking interference
GB1285622A (en) Threshold detector circuit