• Title/Summary/Keyword: 속도기만 재밍

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Implementation of VGPO/VGPI Velocity Deception Jamming Technique using Phase Sampled DRFM (위상 샘플방식 DRFM을 이용한 VGPO/VGPI 속도기만 재밍기법 구현)

  • Kim, Yo-Han;Moon, Byung-Jin;Hong, Sang-Guen;Sung, Ki-Min;Jeon, Young-Il;Na, In-Seok
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.25 no.7
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    • pp.955-961
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    • 2021
  • In modern warfare, the importance of electronic warfare, which carries out a mission that using radio wave to find out enemy information or to protect ally information, has increased. Radar jamming technique is one of the most representative techniques of EA(Electronic Attack), it disturbs and deceives enemy radar system in order to secure ally location information. Velocity deception jamming technique, which is one of the radar jamming techniques, generally operate against pulse-doppler radar which use doppler effect in order to track target's velocity and location. Velocity Deception Jamming Technique can be implemented using DRFM(Digital Radio Frequency Memory) that performs Frequency Modulation. In this paper, I describe implementation method of VGPO/VGPI(Velocity Gate Pull-Off/Pull-In) velocity deception jamming technique using phase-sampled DRFM, and verify the operation of VGPO/VGPI velocity deception jamming technique with board test under signal injection condition.

A Study on the Radar Jamming Signal Simulator Design for the Test & Evaluation (시험평가용 레이다 재밍신호 시뮬레이터 설계 연구)

  • 최성린;이상훈;정회인
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.27 no.2B
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    • pp.160-169
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    • 2002
  • While radar operator recognizes and tracks threat targets through the scope, it is essential to overcome the jamming signal that disturbs the normal operation of the radar. Therefore, to train operator and test the EW capability of the radar, this paper proposed the jamming signal simulation algorithm and design results to generate the deception jamming(range, velocity, angle deception and multiple false targets) and noise jamming signals(spot, barrage, swept spot and cover pulse noise). And also, the radar jamming signal simulator composed of the 6 constituents is developed on basis of the proposed algorithm and digital circuit design technique and confirmed the validity of the developed simulator by means of the test results to generate the various jamming signal.

Radar Countermeasure and Effect Analysis for the Pull-Off Deceptive Jamming Signal (Pull-Off 기만 재밍 신호에 대한 레이다 대응기법 및 효과 분석)

  • Jang, Sunghoon;Kim, Seonjoo
    • Journal of the Korea Institute of Military Science and Technology
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    • v.23 no.3
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    • pp.221-228
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    • 2020
  • This paper presents the radar counter jamming algorithm and ground far-field test results for the pull-off deceptive jamming signals like RGPO(Range Gate Pull Off) and VGPO(Velocity Gate Pull Off). We designed the radar counter jamming algorithm according to the characteristics of the deceptive jamming signals. This algorithm is validated by simulation before ground far-field test. The existing X-band AESA radar demonstrator was used to test the proposed algorithm. The proposed algorithm was applied to the radar processor software. The deceptive jamming signals generated using the commercial jamming signal generator. We performed the repeated ground far-field test with the test scenario. Test results show that the proposed counter deceptive jamming algorithm works in the real radar system.

Development of Real-Time Vision Aided Navigation Using EO/IR Image Information of Tactical Unmanned Aerial System in GPS Denied Environment (GPS 취약 환경에서 전술급 무인항공기의 주/야간 영상정보를 기반으로 한 실시간 비행체 위치 보정 시스템 개발)

  • Choi, SeungKie;Cho, ShinJe;Kang, SeungMo;Lee, KilTae;Lee, WonKeun;Jeong, GilSun
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.48 no.6
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    • pp.401-410
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    • 2020
  • In this study, a real-time Tactical UAS position compensation system based on image information developed to compensate for the weakness of location navigation information during GPS signal interference and jamming / spoofing attack is described. The Tactical UAS (KUS-FT) is capable of automatic flight by switching the mode from GPS/INS integrated navigation to DR/AHRS when GPS signal is lost. However, in the case of location navigation, errors accumulate over time due to dead reckoning (DR) using airspeed and azimuth which causes problems such as UAS positioning and data link antenna tracking. To minimize the accumulation of position error, based on the target data of specific region through image sensor, we developed a system that calculates the position using the UAS attitude, EO/IR (Electric Optic/Infra-Red) azimuth and elevation and numerical map data and corrects the calculated position in real-time. In addition, function and performance of the image information based real-time UAS position compensation system has been verified by ground test using GPS simulator and flight test in DR mode.