• Title/Summary/Keyword: Radar Warning Receiver

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Noise Cancelling Automatic Threshold Control Method for Radar Signal Detection (레이더 신호 탐지를 위한 잡음제거 임계레벨 자동제어 기법)

  • Lee, Chi-Hun
    • Journal of the Korea Institute of Military Science and Technology
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    • v.16 no.2
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    • pp.214-217
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    • 2013
  • In this paper, we proposed an automatic threshold control method for radar warning receiver. Considering the noise level of the environment, this technique can effectively adjust sensitivity level of radar warning receiver and can offer more accurate radar information for aircraft pilot in noisy circumstances.

Algorithm for Threat Data Integration of Multiple Sensor and selection of CounterMeasures (이기종 다중센서 위협데이터 통합 및 대응책 선정 알고리즘)

  • Go, Eun-Kyoung;Woo, Sang-Min;Jeong, Un-Seob
    • Journal of the Korea Institute of Military Science and Technology
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    • v.14 no.3
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    • pp.474-481
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    • 2011
  • The Electronic Warfare Computer for the Aircraft Survivability Equipment will improve the ability for countermeasures by analysis about threat information. This paper suggests method that threat data integration of multiple sensors(Radar Warning Receiver, Laser Warning Receiver, Missile Warning Receiver). The algorithm of threat data integration is based on detected threat sequence and azimuth information. The threat sequence information is analyzed in advance and the azimuth data is received from sensors. The suggested method is evaluated through simulation under the environment like real helicopter.

L-band Pulsed Doppler Radar Development for Main Battle Tank (전차 탑재 L-밴드 펄수 도플러 레이더 설계 및 제작)

  • Park, Gyu-Churl;Ha, Jong-Soo
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.20 no.6
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    • pp.580-588
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    • 2009
  • A Missile Warning Radar is an essential sensor for active protection system to detect antitank missile in all weather environments. This paper presents the design, development, and test results of L-band pulsed Doppler radar system for main battle tank. This radar system consists of 3 LRUs, which include antenna unit, transmitter and receiver unit and radar signal & data processing unit. The developed core technologies include the patch antenna, SSPA transmitter, coherent I/Q detector, DSP based Doppler FFT filter, adaptive CFAR, SIW tracking capability, and threat decision. The design performance of the developed radar system is verified through various ground fixed and moving vehicle test.

Source Localization Technique for Radar Pulse Emission by Using Scanning Method of Interest Area (관심영역 스캐닝기법을 이용한 레이더 펄스 발생원 위치 추정기법)

  • Choi, Kyong-Sik;Kim, Jong-Pil;Won, Hyeon-Kwon;Park, Jae-Hyun;Kim, In-Gyu
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.39 no.9
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    • pp.889-895
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    • 2011
  • In recent days, some techniques to prevent from radar detection have been applied on aircraft system. RWR(Radar Warning Receiver) can be used for estimating the source location of the aircraft which emits radar pulse. Current existing method of localizing radar pulse emission source is using AOA(Angle Of Arrival) and most techniques are focused on finding exact AOA to find exact location. In this case, however, the exact AOA does not always result in finding exact source location while target aircraft is moving fast. In this paper, a localization method using the phase delay of the radar pulse's low frequency applies and so a scanning method for the interest area does in order to estimate exact source location by using phase delay.

Development and Performance Test of Ka-Band Pulsed Doppler Radar System for Road Obstacle Warning (도로 장애물 경보를 위한 Ka-대역 펄스 도플러 레이다 시스템 개발 및 성능시험)

  • Jung, Jung-Soo;Seo, Young-Ho;Kwag, Young-Kil
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.25 no.1
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    • pp.99-107
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    • 2014
  • Abruptly occurred obstacles on highway threaten driving safety. Radar draws the attention to the collision avoidance system because it can be fully operational in all weather, and day and night condition. This paper presents the design, implementation and performance test results of pulsed Doppler radar system for detection and warning of road obstacles. The system is designed to consider highway environment and detection capability about various fixed and moving obstacles. The system consists of 4 subsystems, which include antenna unit, transmitter and receiver unit, radar signal & data processing unit, and controller & display unit. The core technologies include clutter map based change detection for fixed obstacles detection, Doppler estimation for velocity detection of moving targets, and azimuth angle estimation method using monopulse for lane estimation and tracking. The design performance of the developed radar system is verified through experiments using a fixed reference target and moving vehicles in test highway.

Signal Processing Algorithm to Reduce RWR Electro-Magnetic Interference with Tail Rotor Blade of Helicopter

  • Im, Hyo-Bin;Go, Eun-Kyoung;Jeong, Un-Seob;Lyu, Si-Chan
    • International Journal of Aeronautical and Space Sciences
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    • v.10 no.2
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    • pp.117-124
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    • 2009
  • In the environment where various and complicated threat signals exist, RWR (Radar Warning Receiver), which can warn pilot of the existence of threats, has long been a necessary electronic warfare (EW) system to improve survivability of aircraft. The angle of arrival (AOA) information, the most reliable sorting parameter in the RWR, is measured by means of four-quadrant amplitude comparison direction finding (DF) technique. Each of four antennas (usually spiral antenna) of DF unit covers one of four quadrant zones, with 90 degrees apart with nearby antenna. According to the location of antenna installed in helicopter, RWR is subject to signal loss and interference by helicopter body and structures including tail bumper, rotor blade, and so on, causing a difficulty of detecting hostile emitters. In this paper, the performance degradation caused by signal interference by tail rotor blades has been estimated by measuring amplitude video signals into which RWR converts RF signals in case a part of antenna is screened by real tail rotor blade in anechoic chamber. The results show that corruption of pulse amplitude (PA) is main cause of DF error. We have proposed two algorithms for resolving the interference by tail rotor blades as below: First, expand the AOA group range for pulse grouping at the first signal analysis phase. Second, merge each of pulse trains with the other, that signal parameter except PRI and AOA is similar, after the first signal analysis phase. The presented method makes it possible to use RWR by reducing interference caused by blade screening in case antenna is screened by tail rotor blades.

Communication Noise Dynamic Cancellation Method for Radar Pulse Detection (레이더 펄스 탐지를 위한 통신 전자파잡음 동적제거 기법)

  • Jeong, Un-Seob;Lee, Chi-Hun;Choi, Chae-Taek;Choi, Seung-Ho
    • Proceedings of the Korea Information Processing Society Conference
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    • 2012.11a
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    • pp.732-735
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    • 2012
  • 본 논문은 지상에서 발생하는 전자파 잡음 신호의 유입에 의해 많은 영향을 받을 수 있는 헬기 등 항공기의 레이더경보수신기(Radar Warning Receiver)에서도 레이더 펄스 신호를 탐지할 수 있는 통신전자파잡음 동적제거 기법을 제안하였다. 본 논문은 지상의 노이즈 신호를 분류하는 방법을 제시하였고, 노이즈 신호 레벨을 판단하여 효과적으로 잡음을 제거하는 알고리즘을 제안하였다.

Detection, Identification and Surveillance System Development of Illegal Fishing Vessels in Inshore Fishing Ground (연안 어장에서의 불법 조업 어선의 탐지, 식별 및 감시 시스템 개발)

  • LEE Dae-Jae;KIM Kwang-Sik
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.37 no.4
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    • pp.337-344
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    • 2004
  • A real-time surveillance system of the inshore fishing ground was constructed to identify and detect discrete targets, such as illegal fishing vessels. This paper describes measurements made with a combination of sensors, such as radar, CCTV camera, and GPS receivers, for monitoring the fishing activity of small vessels within the fishing limit zones of the inshore waters. The CCTV camera system was used to confirm detection and to classify the type of target. The location of legal vessels distributed in coastal waters was acquired from each GPS system of ships connected to commercial satellite communication network. The surveillance system was networked via LAN to one host PC with the use of electronic navigational charts (ENC) and a radar link. Radar Target Extractor (RTX) for radar signal processing can be remotely accessed and controlled on existing PC via the internet, from anywhere, at any time. Results are presented that demonstrate the effectiveness of the newly constructed fisheries monitoring system for conducting continuous surveillance of illegal fishing vessels in the inshore fishing ground. The identification of illegal fishing vessels was achieved by comparing radar positions of illegal fishing vessels exceeding the warning limits in the surveillance area with GPS position reports transmitted from legal fishing vessels, and the illegal fishing vessels were marked with red symbols on the ENC screen of a PC. The methods to track the activities of all vessels intruding or leaving the fishing limit zones also were discussed.

Study of the UCAS Susceptibility Parameters and Sensitivities by using Monte-Carlo Simulation (몬테카를로 모사법을 이용한 무인전투기의 위약도에 영향을 미치는 파라미터와 민감도에 대한 연구)

  • Choi, Kwang-Sik;Lee, Kyung-Tae
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.39 no.3
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    • pp.242-253
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    • 2011
  • The typical missions for the current stand-off UAVs are surveillance and reconnaissance. On the other hand, the primary mission for the future UCAS will be combat mission such as SEAD under the man-made ultimately hostile environment including SAM, antiaircraft artillery, threat radar, etc. Therefore, one of the most important challenges in UCAS design is improvement of survivability. The current studies for aircraft combat survivability are focused on the improvement of susceptibility and vulnerability of manned aircraft system. Although the survivability design methodology for UCAS might be very similar to the manned combat system but there are some differences in mission environment, system configuration, performance between manned and unmanned systems. So the parameters and their sensitivities which affect aircraft combat survivability are different in qualitatively and quantitatively. The susceptibility related parameters for F-16 C/D and X-45A as an example of manned and unmanned system are identified and the susceptibility parameter sensitivities are analyzed by using Monte-Carlo Simulation in this study.

Research on the Layered Architecture for Electronic Warfare System Software based on Attribute-Driven Design 3.0 (ADD 3.0 기반 전자전 소프트웨어의 계층적 아키텍처 연구)

  • Jeongwoo Lee;Sujin Kim;Jinhyuk Heo;Hyojeong Jang;Jinwoo Han
    • Journal of the Korea Institute of Military Science and Technology
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    • v.27 no.2
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    • pp.247-255
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    • 2024
  • Development of electronic warfare(EW) software has become increasingly challenging due to stricter regulations, shorter development cycles, and increased reliability testing. Consequently, software development often proceeds without proper architecture design, which can lead to missing critical quality requirements and potential system redesigns. In this study, we propose using Attribute-Driven Design(ADD) 3.0 to design software architecture specifically tailored for EW systems, enabling a more systematic approach to address quality requirements. The paper presents an overview of EW software and ADD 3.0 methodology, followed by an analysis of the architecture design results using static and dynamic views. The paper concludes by discussing the effectiveness of the proposed architecture design.