SE2000153A1 - Radar electronic protection method against DRFM false target jamming - Google Patents

Radar electronic protection method against DRFM false target jamming

Info

Publication number
SE2000153A1
SE2000153A1 SE2000153A SE2000153A SE2000153A1 SE 2000153 A1 SE2000153 A1 SE 2000153A1 SE 2000153 A SE2000153 A SE 2000153A SE 2000153 A SE2000153 A SE 2000153A SE 2000153 A1 SE2000153 A1 SE 2000153A1
Authority
SE
Sweden
Prior art keywords
pulse
radar
drfm
pulses
main
Prior art date
Application number
SE2000153A
Inventor
Anders Widman
Original Assignee
Anders Widman
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 Anders Widman filed Critical Anders Widman
Priority to SE2000153A priority Critical patent/SE2000153A1/en
Publication of SE2000153A1 publication Critical patent/SE2000153A1/en

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
    • G01S7/36—Means for anti-jamming, e.g. ECCM, i.e. electronic counter-counter measures
    • 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

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

Radar electronic protection method against DRFM false target jammingAbstractDRFM false target generation is a serious jamming threat to radar. The DRFM captures and copy the radar pulses making jamming pulses identical to the pulses the radar transmit. The invention explore drawbacks common in DRFM jammers in order to protect the radar from being deceived by false targets.The invention is a method to be used in a radar device. The method is to transmit an extra pulse at the same frequency as the main pulse but the second pulse shall be amplitude attenuated typically around 6 dB. The second pulse, called secondary pulse, shall be delayed approximately two pulse widths from the main pulse. Alternatively the secondary pulse can be transmitted before the main pulse.The radar will expect to receive this extra attenuated pulse at the right distance from a normal target echo. The DRFM jammer employing one of the mentioned drawbacks will fail to produce this extra pulse and hence echoes without it or with non attenuated secondary pulse can be indicated being a jammer false target.Background and problem descriptionDRFM false target generation is a serious jamming threat to radar. The DRFM captures and copy the radar pulses making jamming pulses identical to the pulses the radar transmit. Traditionally a guard antenna is used to prevent false targets in the sidelobe and backlobe regions but it does not protect against main lobe false targets. The invention explore drawbacks common in DRFM jammers. The first drawback is that the latest recorded pulse for a radar is used in the false target generation and the second drawback is that the DRFM input signal is amplitude limited to improve jamming signal quality and handle a large dynamic range input vs. output. The invention explore either of the drawbacks.Figure descriptionFigure 1 shows part of a radar block diagram. The Modulator must be able to attenuate pulses which is shown in the figure by a controlled attenuator. The Modulator and Signal processing must be tailored to the invention.Figure 2 shows a pulse pair with main pulse and secondary pulse.Description of the inventionThe invention is a method to be used in a radar device. The method is to transmit an extra pulse at the same frequency as the main pulse but the second pulse shall be amplitude attenuated typically around 6 dB. The second pulse, hereafter called secondary pulse, shall be delayed approximately two pulse widths from the main pulse. Alternatively the secondary pulse can be transmitted before the main pulseThe radar will expect to receive this extra attenuated pulse at the right distance from a normal target echo. The DRFM jammer employing one of the mentioned drawbacks will fail to produce this extra pulse
SE2000153A 2020-09-08 2020-09-08 Radar electronic protection method against DRFM false target jamming SE2000153A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE2000153A SE2000153A1 (en) 2020-09-08 2020-09-08 Radar electronic protection method against DRFM false target jamming

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE2000153A SE2000153A1 (en) 2020-09-08 2020-09-08 Radar electronic protection method against DRFM false target jamming

Publications (1)

Publication Number Publication Date
SE2000153A1 true SE2000153A1 (en) 2022-03-09

Family

ID=81000022

Family Applications (1)

Application Number Title Priority Date Filing Date
SE2000153A SE2000153A1 (en) 2020-09-08 2020-09-08 Radar electronic protection method against DRFM false target jamming

Country Status (1)

Country Link
SE (1) SE2000153A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4143375A (en) * 1976-05-20 1979-03-06 Messerschmitt-Bolkow-Blohm Method and apparatus for preventing jamming of locating and transmission systems
JPS5669570A (en) * 1979-11-09 1981-06-10 Toshiba Corp Radar
US4546356A (en) * 1981-08-21 1985-10-08 Lmt-Radio Professionnelle Process for the protection of a radar against jamming and radar for putting this process into effect
CN106443597B (en) * 2016-12-06 2019-03-15 上海机电工程研究所 Fight the adaptive anti-spoofing system and its anti-spoofing method of active decoy interference

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4143375A (en) * 1976-05-20 1979-03-06 Messerschmitt-Bolkow-Blohm Method and apparatus for preventing jamming of locating and transmission systems
JPS5669570A (en) * 1979-11-09 1981-06-10 Toshiba Corp Radar
US4546356A (en) * 1981-08-21 1985-10-08 Lmt-Radio Professionnelle Process for the protection of a radar against jamming and radar for putting this process into effect
CN106443597B (en) * 2016-12-06 2019-03-15 上海机电工程研究所 Fight the adaptive anti-spoofing system and its anti-spoofing method of active decoy interference

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