Journal of the Institute of Convergence Signal Processing (융합신호처리학회논문지)

The Korea Institute of Convergence Signal Processing (한국융합신호처리학회)
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A method for automatically adjusting threshold to improve the intercept pulse detection performance of submarine

잠수함의 방수펄스탐지 성능 향상을 위한 문턱값 자동 조절 방법

  • Received : 2021.11.29
  • Accepted : 2021.12.30
  • Published : 2021.12.31
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Abstract

The submarine's intercept pulse detection detects pulses radiated from enemy surface ships, submarines, and torpedoes, and performs an important function of providing maneuverability and survivability of submarine. Whether or not the intercept pulse is detected is determined by comparing the size of the received pulse with the threshold value by the operator. In the case of intercept pulses, the intensity of the pulses is frequently reduced under the influence of various environmental factors. In the situation, if detection is performed with a fixed threshold, a non-detection problem occurs and persists until the operator sets a low threshold. In this paper, we proposed method for automatically adjusting threshold to reduce the non-detection problem caused by a fixed threshold. Simulation were preformed on 4 cases with different pulse level fluctuation widths, and it was confirmed that the detection performance was improved by increasing the number of detections when a method for automatically adjusting threshold was applied to all cases. Through the proposed method, it is expected that the intercept pulse detection performance will be improved in the marine environment the large fluctuations in pulse level in the future.

잠수함의 방수펄스탐지는 적 수상함 및 잠수함, 어뢰 등에서 방사하는 펄스를 탐지하여 자함의 기동 및 생존성을 제공하는 중요한 기능을 수행한다. 방수펄스탐지 여부는 수신한 펄스의 크기와 운용자가 설정한 문턱값의 비교를 통해 결정된다. 방수펄스는 다양한 해양 환경요인의 영향으로 펄스의 세기가 작아지는 경우가 빈번하게 발생한다. 이런 상황에서 고정 문턱값으로 탐지를 수행할 경우 미탐지 문제가 발생되며 운용자가 낮은 문턱값을 설정하기 전까지 지속된다. 본 논문은 고정 문턱값으로 발생하는 미탐지 문제를 줄이기 위한 문턱값 자동 조절 방법을 제안하였다. 펄스 레벨 변동 폭이 다른 4가지 케이스로 시뮬레이션을 수행하였고 모든 케이스에서 문턱값 자동 조절 방법을 적용했을 때 탐지 개수가 증가하여 탐지 성능이 향상됨을 확인하였다. 제안한 방법을 통해 향후 펄스 레벨의 변동이 큰 해양환경에서 방수펄스탐지 성능 향상을 기대해본다.

Keywords

References

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