Journal of the Korea Convergence Society (한국융합학회논문지)

Korea Convergence Society (한국융합학회)
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An investigation of the Azimuth Error for Correlative Interferometer Direction Finding

상관형 위상비교 방향 탐지의 고도차에 대한 방위각 오차분석

  • Kim, Young-Ho (Department of Electronics, Hongik University) ;
  • Lim, Joong-Soo (Division of Information Communication Eng., Baekseok University) ;
  • Chae, Gyoo-Soo (Division of Information Communication Eng., Baekseok University) ;
  • Kim, Kichul (Agency for Defense Development)
  • Received : 2015.07.29
  • Accepted : 2015.10.20
  • Published : 2015.10.31
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Abstract

In this paper, we present an azimuth error analysis for the correlative interferometer direction finding. The correlative interferometer is a direction finding method that compares the theoretical and measured phase differences. The direction of the radio transmitter can be estimated by obtaining the maximum correlation between two data sets. We used a 5-element circular array antennas arranged in a circle. To derive the correlation function between antenna elements, we assume that the incident plane wave arrives from a certain angle and the phase difference of each antenna can be derived by comparing with the reference. The suggested direction finding gives a relatively accurate result even if the radio transmitter is located in the higher altitude.

본 논문에서는 상관형 위상비교(correlative interferometer) 방향탐지의 방위각 오차에 대해서 기술하였다. 상관형 위상비교 방식은 잡음이 없는 이상적인 환경에서 계산한 위상과 잡음이 있는 실제 환경에서 측정한 위상을 상호 비교하여 상관계수가 가장 큰 방위각을 전파 발신기의 방향으로 추정하는 방식이다. 5개의 안테나를 원형으로 배치하는 원형 배열안테나(circular array antenna)를 이용하여 각 안테나 사이의 상관함수를 유도하여 잡음에 의한 방향탐지 오차를 유도하였다. 이 방법은 잡음에 대한 방탐오차가 매우 작고, 특히 전파 발사체와 방향탐지 장치의 고도 차이가 큰 경우에도 방향탐지 오차가 작은 것으로 나타났다.

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