The Journal of the Korea institute of electronic communication sciences (한국전자통신학회논문지)

Korea Institute of Electronic Communication Science (한국전자통신학회)
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Cascade AOA Estimation Using Uniform Rectangular Array Antenna

등간격 사각 배열 안테나를 적용한 캐스케이드 도래각 추정

  • 김태윤 (조선대학교 전자공학과) ;
  • 황석승 (조선대학교 전자공학부)
  • Received : 2018.08.25
  • Accepted : 2018.10.15
  • Published : 2018.10.31
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Abstract

In the wireless communication system based on an array antenna, the angle of arrival (AOA) information of signal is very important element and various AOA estimation algorithms have been studied. Although most AOA estimation algorithms employ the uniform linear array (ULA), some algorithms apply the planar array (PA) antenna. In this paper, we present an algorithm for efficiently estimating AOAs of adjacent multiple signals, based on the uniform rectangular array antenna. This approach has two steps; after approximately estimating AOA groups consisting of the closely located signal sources using CAPON, accurately estimating the individual AOA of each signal in the estimated AOA group using Beamsapce MUSIC. The estimation performance of the presented cascade AOA algorithm is illustrated through the computer simulation example.

안테나 어레이 기반의 무선 통신 시스템에서 신호의 도래각(: Angle-of-Arrival, AOA) 정보는 매우 중요한 요소이며, 이를 추정하기 위한 다수의 방법들이 존재한다. 대부분의 도래각 추정 알고리즘은 등간격 선형 배열(: Uniform Linear Array, ULA) 안테나를 기반으로 하고 있으며, 몇몇의 알고리즘은 평면 배열(: Planar Array, PA) 안테나를 적용하였다. 본 논문에서는 등간격 사각 어레이 안테나를 기반으로 인접하게 위치한 여러 개의 신호 도래각들을 효율적으로 추정하기 위한 알고리즘을 소개한다. 제시된 알고리즘은 두 단계를 거치는데, 가까운 신호원들이 모여 이루어진 대략적인 신호원 그룹을 CAPON 알고리즘을 사용하여 추정한 후, 추정된 그룹 안에 포함되어 있는 각 신호원의 상세한 도래각을 Beamspace MUSIC 알고리즘을 사용하여 추정한다. 시뮬레이션을 통해 제시된 도래각 추정 알고리즘의 성능을 평가하고 분석한다.

Keywords

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