전자공학회논문지 (Journal of the Institute of Electronics and Information Engineers)

  • 제52권1호
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  • Pages.121-131
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  • 2015
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  • 2287-5026(pISSN)
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  • 2288-159X(eISSN)
대한전자공학회 (The Institute of Electronics and Information Engineers)
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이동 수신기 환경에서 연속된 T/FDOA와 DOA를 이용한 고정 신호원의 위치 추정 방법

Estimation and Analysis of Two Moving Platform Passive Emitter Location Using T/FDOA and DOA

  • 투고 : 2014.06.16
  • 심사 : 2014.12.24
  • 발행 : 2015.01.25
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초록

현대의 수동형 위치 추정(passive emitter localization) 분야에서는 수신기 운용의 효율성을 위해 적은 수의 수신기를 이용한 원거리 신호원의 정밀한 위치추정을 지향한다. 적은 수의 수신기로 정밀한 위치추정을 위해서 연속적이고, 측정 정보들의 복합적 활용을 통해 위치 추정 성능 향상을 기대할 수 있다. 본 논문에서는 제한된 환경의 2개의 이동하는 수신기 환경에서 측정 정보별 이론적 위치추정 성능을 분석하고, 위치추정 성능이 우수할 것으로 예상되는 TDOA (time difference of arrival)와 FDOA (frequency difference of arrival), 그리고 DOA (direction of arrival) 복합 측정 정보기반으로 비선형 최소자승법 중 하나인 LM (Levenberg-Marquardt) 방법을 이용하여 지상 고정 신호원의 위치를 추정하는 방법을 제안한다. 구체적으로 TDOA를 이용하여 산출한 방위 모호성이 포함된 DOA들을 이용하여 신호원의 초기 위치를 산출하고, 해당 신호원의 초기 위치와 T/F/DOA를 이용하여 위치추정 성능을 향상 시킨다.

Passive emitter localization is preferred to use a small number of receivers as possible for the efficiency of strategic management in the field of modern electronic warfare support. Accurate emitter localization can be expected when utilizing continuous measurable parameters and a appropriate combination of theirs. For this reason, we compare CRLB (Cramer-Rao lower bound) of two moving platform with various measurable parameters to choose a appropriate combination of parameters for a better localization performance. And we propose the passive emitter localization method based on Levenberg-Marquardt algorithm with combined TDOA/FDOA and DOA to achieve better accuracy of emitter localization which is located on the ground and stationary. In addition, we present a method for determining the initial emitter position for LM algorithm's input to avoid the divergence of estimation and local minimum.

키워드

참고문헌

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피인용 문헌

  1. 회전안테나를 이용한 고정 신호원 위치탐지 시스템 vol.19, pp.6, 2015, https://doi.org/10.9766/kimst.2016.19.6.681
  2. 다수 정보들의 비선형 최적화에 의한 수중 음원 위치 추정 성능 향상 vol.36, pp.6, 2015, https://doi.org/10.7776/ask.2017.36.6.419