Journal of Convergence for Information Technology (융합정보논문지)

Convergence Society for SMB (중소기업융합학회)
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A Detection Algorithm for Modulation Types of Radar Signals Using Autocorrelation Comparison Ranges

자기상관 비교 범위를 활용한 레이더 신호의 펄스 변조 형태 검출 알고리즘

  • Kim, Gwan-Tae (Department of Computer Science, Chungbuk National University) ;
  • Ju, Youngkwan (Department of Computer Science, Chungbuk National University) ;
  • Jeon, Joongnam (Department of Computer Science, Chungbuk National University)
  • 김관태 (충북대학교 전자정보대학 소프트웨어학과) ;
  • 주영관 (충북대학교 전자정보대학 소프트웨어학과) ;
  • 전중남 (충북대학교 전자정보대학 소프트웨어학과)
  • Received : 2018.09.18
  • Accepted : 2018.10.20
  • Published : 2018.10.31
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Abstract

Generally, a radar signal is modulated and transmitted in order to avoid signal detection. In electronic warfare, the specification of a radar is recognized by analysing the received radar pulses. In this paper, we propose an algorithm to recognize the PRI (Pulse Repetition Interval) type of radar signals. This algorithm uses the autocorrelation technique applying different comparison ranges according to the PRI type. It applies a short comparison window to stable and staggered PRI, and a relatively large comparison range to jittered PRI. The experiment shows that the proposed algorithm can discriminate the PRI type of radar pulses correctly. For the more, it can find out the stagger level of staggered type of radar signals.

일반적으로 레이더는 신호 탐지를 회피하기 위해 신호를 변조해 송신한다. 전자전에서는 수신된 레이더 펄스를 분석하여 신호를 방사한 레이더의 제원을 식별한다. 본 논문에서는 자기상관계수를 활용하여 레이더 신호 변조 형태를 식별하는 알고리즘을 제안한다. 레이더 신호의 펄스반복주기 특성에 따라 자기상관을 계산할 때 비교 범위를 다르게 적용한다. 고정 펄스반복주기와 스태거 펄스반복주기에 대하여 좁은 오차 범위를 적용하고, 지터 펄스반복주기에는 넓은 오차 범위를 적용하여 자기상관계수를 계산한다. 실험에 의하여 제안하는 알고리즘은 고정 펄스반복주기, 스태거 펄스반복주기, 지터 펄스반복주기를 정확하게 구분함과 동시에 스태거의 레벨도 정확히 찾을 수 있음을 확인하였다.

Keywords

References

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