• Title/Summary/Keyword: Electronic Support(ES)

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Analysis of the ES detection loss related to the circular scan of radars (레이더의 원형 스캔에 따른 ES 탐지손실 분석)

  • Ryoo, Young-Jin;Kim, Whan-Woo
    • Journal of the Institute of Electronics Engineers of Korea SP
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    • v.42 no.6
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    • pp.159-166
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    • 2005
  • The pulse amplitude of a search radar signal received by an ES system is not constant pulse by pulse because of the radar's scan characteristics. The variation of the pulse amplitude causes the ES detection loss in the ES system. Therefore, the ES detection range equation should consider the ES detection loss caused by the search radar's scan characteristics. In this paper, we theoretically analyze the ES detection loss for the circular scar and propose the model to evaluate it quantitatively. The experiment results for the real search radar signals demonstrate that the proposed model is suitable for the evaluation model of the ES detection loss related to the circular scan of radars.

A Study on EMI Shield Optimization for Improvement of EMI between MIL-SATCOM and ES on a Surface Ship (수상함 MIL-SATCOM과 ES간의 전자기 간섭 개선을 위한 EMI 차폐판 최적설계 연구)

  • Chang, Hoseong;Ham, Younghoon;Jo, Kwanjun
    • Journal of the Korea Institute of Military Science and Technology
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    • v.20 no.1
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    • pp.63-71
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    • 2017
  • During the sea trial test, we discovered EMI(Electromagnetic Interference) between MIL-SATCOM parabolic antenna and ES(Electronic Warfare Support) omni antenna. Emitted side lobe of CW(Continuous Wave) from MIL-SATCOM raises the threshold level of ES omni antenna. Therefore detection rate of ES is decreased. To solve this problem, the path of side lobe of CW from MIL-SATCOM should be blocked using EMI shield. This paper presents the method how to calculate the size of EMI shield, material, and optimized deployment. The test of the EMI shield effect was performed on a surface ship. After installing EMI shield, EMI has been decreased significantly. This paper will provide a method how to design EMI shield and a way to verify the result.

A Study on the Improvement of Direction Error for Electronic Warfare System (전자전장비의 방향탐지 오차 개선에 관한 연구)

  • Choi, Jae-In;Kim, Seung-Woo;Chin, Hui-Cheol;Choi, Woo-Hyuk
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.18 no.6
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    • pp.567-575
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    • 2017
  • The direction finder is an important device for an electronic support(ES) system because it is responsible for finding the direction of an emitter. The higher the accuracy of the direction finding, the higher the vitality of the weapon system with the ES system. Recently, the direction error occurred in the operating shipboard ES system when direction finding was performed for the signal with a pulse width of 200 ns. Therefore, this paper proposes, an improved method to reduce the direction error for shipboard ES systems. The proposed method was applied to the operating shipboard ES system and a field test was performed. The results of the field test showed that the direction error was reduced significantly for the signal with a pulse width of 200 ns.

Recognition of PRI modulation types of radar signals using the autocorrelation (자기상관관계를 이용한 레이더 신호의 PRI 변조형태 인식 기법)

  • Ryoo Young-Jin;Kim Whan-Woo
    • Journal of the Institute of Electronics Engineers of Korea SP
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    • v.43 no.3 s.309
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    • pp.61-67
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    • 2006
  • In electronic support systems, the analysis of PRI modulation characteristics for radar signals has attracted much interest because of the problem of the identification ambiguity in dense electronic warfare signal environments. A new method of recognizing the PRI modulation types of radar pulse signals is proposed for electronic support. The proposed method recognizes the PRI modulation types using the classifiers which are based on the property of the linear autocorrelation of the PRI sequences for each PRI modulation type. In addition, the proposed method estimates the PRI modulation period for the PRI modulation types with the periodicity. Simulation results are presented to show the performance of the proposed method.

An adaptive clustering scheme for ES (전자전 지원을 위한 적응적 그룹화 기법)

  • Han, Jin-Woo;Song, Kyu-Ha;Lee, Dong-Woen
    • Proceedings of the KIEE Conference
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    • 2006.10c
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    • pp.366-368
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    • 2006
  • Electronic warfare Support(ES) system measures pulse characteristics for received RF signals that received from all directions. ES system discriminates the pulse trains that have a rule, correlationship, continuance from collected data and analyze the characteristics of the data, and identify the emitters by comparison with emitter identification data(EID). Because pulse density is very high and various signal source exists at modem signal environments, high-speed and accurate signal analysis is needed for realtime countermeasure to emitters. Grouping alleviates the load of signal analysis process and supports reliable analysis. In this paper, we suggest an adaptive clustering scheme regarding signal patterns.

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A Search Band Implementation Considering the Receivers of the Electronic Warfare Support System (전자전 ES 시스템의 수신기를 고려한 탐색대역 생성)

  • Yoon, In-Bok;Jeong, Chang-Min
    • Journal of the Korea Institute of Military Science and Technology
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    • v.14 no.6
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    • pp.1091-1096
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    • 2011
  • The main factors of radar signals used in electronic warfare are Radio Frequency(RF), Pulse Repetition Interval(PRI), Pulse Width(PW), Scan Parameter(SP) and so on. This radar signals may have some important information for the electronic warfare. So, there is a necessity for making a threat database to decide whether the radar signal is a threat or not. When the electronic support system collects some threat radar signals, it needs the search band to control the receivers and filter banks of the system. In this paper we propose search band implementation considering the type and center frequency of the receivers of the electronic support system.

Radar Signal Pattern Recognition Using PRI Status Matrix and Statistics (PRI 상태행렬과 통계값을 이용한 레이더 PRI 신호패턴 인식)

  • Lee, Chang-ho;Sung, Tae-kyung
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2016.10a
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    • pp.775-778
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    • 2016
  • In this paper, we propose a new method to automatically recognize PRI modulation type of radar signal at ES(Electronic Support) in electronic singal environment. The propose method stores pattern of PRI(Pulse Repetition Interval) of radar signal and uses statistic data, which firstly classifies into 2 classes. Then the proposed method recognizes each PRI signal using statistic characteristic of PRI. We apply various 5 kinds of PRI signal such as constant PRI, jitter PRI, D&S(dwell & switch) PRI, stagger PRI, sliding PRI, etc. The result shows the proposed method correctly identifies various PRI signals.

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A Study on Optimal Deployment for Improvement of EMI between MOSCOS and ES DF Antenna on a Surface Ship (수상함 MOSCOS와 ES 방향탐지 안테나간의 전자기 간섭 개선을 위한 최적배치 연구)

  • Chang, Hoseong;Son, Yoonjun
    • Journal of the Korea Institute of Military Science and Technology
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    • v.20 no.2
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    • pp.197-205
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    • 2017
  • During the sea trial, we discovered EMI between MOSCOS and ES DF antenna. CW emitted by MOSCOS raised the threshold level of ES DF antenna. As a result, direction finding rate of ES has been decreased. This is a study for the improvement of EMI between the antennas mounted on a surface ship. An analysis is accomplished for MOSCOS, ES DF antenna and Jamming transmitter. This paper presents the method how to solve EMI based on the measurements and calculations about the ES DF antenna receiving level, MOSCOS radiation pattern and Jamming transmitter thermal noise. The test was performed with optimal deployment of MOSCOS on a surface ship. After changing the position of MOSCOS, EMI has been decreased significantly.

A Kernel Density Signal Grouping Based on Radar Frequency Distribution (레이더 주파수 분포 기반 커널 밀도 신호 그룹화 기법)

  • Lee, Dong-Weon;Han, Jin-Woo;Lee, Won-Don
    • Journal of the Institute of Electronics Engineers of Korea SP
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    • v.48 no.6
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    • pp.124-132
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    • 2011
  • In a modern electronic warfare, radar signal environments become more denser and complex. Therefor the capability of reliable signal analysis techniques is required for ES(Electronic warfare Support) system to identify and analysis individual emitter signals from received signals. In this paper, we propose the new signal grouping algorithm to ensure the reliable signal analysis and to reduce the cost of the signal processing steps in the ES. The proposed grouping algorithm uses KDE(Kernel Density Estimator) and its CDF(Cumulative Distribution Function) to compose windows considering the statistical distribution characteristics based on the radar frequency modulation type. Simulation results show the good performance of the proposed technique in the signal grouping.

Novel Radar Signal Blanking Method for Electronic warfare Support (전자전지원을 위한 새로운 레이더 신호 수신 블랭킹 기법)

  • Song, Kyu-Ha;Lee, Dong-Weon;Han, Jin-Woo;Lyu, Si-Chan
    • Proceedings of the IEEK Conference
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    • 2007.07a
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    • pp.335-336
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    • 2007
  • The blanking interface between an ES system and a radar system on the same platform cause the unwanted radar signal separation in the process of the signal measurement of the ES system. In this paper, we propose the novel radar signal blanking method for ES. The proposed method extracts a standard of judgement which we can decide whether a radar signal is separated by the blanking interface and presents how to merge the separated signals. Test result is presented to show the performance of the proposed method.

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