등간격 사각형 배열을 이용한 효율적인 직접 신호-기반의 도래각 추정
An Efficient Direct Signal-Based Direction of Arrival Estimation Using Uniform Rectangular Array
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초록
이 논문에서는 등간격 사각형 배열(Uniform Rectangular Array: URA)을 사용하는, 계산상 효율적인 2차원 도래각(Direction of Arrival: DoA) 추정 방법을 제안한다. 제안된 방법은 안테나에 도달한수신 신호들간의 상관행렬 대신 그들 사이의 위상 관계에 직접적으로 기반하고 있기 때문에 직접신호-기반 방법이라고 한다. 시뮬레이션 결과에 따르면 직접 신호-기반의 방법이 기존의 어느 방법들보다 현저히 적은 계산량으로도 평균 제곱근 오차(Root-Mean-Squared Error: RMSE)와 최대 절대 오차 측면에서 다중 신호 분류(MUltiple SIgnal Classification: MUSIC) 방법과 비교할 만한 성능을 보여준다.
Abstract
This paper proposes a computationally efficient 2-D direction-of-arrival (DoA) estimation method with a uniform rectangular array (URA). This method is called the direct signal-based method in the sense that it is based directly on the phase relationships among the signals arriving at each antenna of an antenna array rather than their correlation matrix. According to the simulation results, it has be shown that the direct signal-based method, with much less computations than any existing methods, yields the performance comparable to that of the MUSIC (MUltiple SIgnal Classification) method in terms of the root-mean-squared error (RMSE) and the maximum absolute error.
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