Journal of Digital Convergence (디지털융복합연구)

The Society of Digital Policy and Management (한국디지털정책학회)
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Analysis of Direction Finding Accuracy for Amplitude-Phase Comparison and Correlative Interferometer Method

진폭-위상 복합비교 기법과 상관형 위상비교 기법의 방향탐지 정확도 분석

  • Lim, Joong-Soo (Division of Information & Communication Eng., Baekseok University/EWRC) ;
  • Chae, Gyoo-Soo (Division of Information & Communication Eng., Baekseok University/EWRC)
  • 임중수 (백석대학교 정보통신학부/전자전특화센터) ;
  • 채규수 (백석대학교 정보통신학부/전자전특화센터)
  • Received : 2015.11.30
  • Accepted : 2016.01.20
  • Published : 2016.01.28
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Abstract

In this paper, we present the direction finding accuracy of correlative interferometer method and amplitude-phase comparison method. Spiral antennas are used for amplitude-phase comparison method and blade antennas are used for correlative interferometer method. Those are made for uniform circular array (UCA) direction finding antenna systems. We simulate the accuracy of azimuth angle with 3 antennas UCA when SNR is 20 dB and baseline is 0.5 wave length. Correlative interferometer method has better accuracy than amplitude-phase comparison method.

본 논문에서는 진폭-위상 복합비교 방향탐지 방식과 상관형 위상비교 방향탐지 방식의 방향탐지 정확도에 대해서 기술하였다. 복합비교 방식은 지향성 빔 특성을 갖는 스파이럴 안테나를 사용하고 상관형 방식은 블레이드 안테나를 사용하여 방위각 $360^{\circ}$를 동시에 탐지할 수 있는 균일원형배열(UCA: uniform circular array) 구조로 안테나를 배치하고 방위각의 방향탐지 정확도를 분석하였다. 3개의 안테나를 배치하는 경우 신호잡음비(SNR)가 20dB이고 파장에 대한 안테나 사이의 거리($D/{\lambda}$)가 0.5인 경우 복합비교 방식은 방향탐지 정확도가 $4.0^{\circ}$, 상관형 위상비교 방식은 방향탐지 정확도가 $1.8^{\circ}$로 나타나서 상관형 위상비교 방식이 정확도가 높은 것을 확인하였다.

Keywords

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