一种基于余弦函数的相位干涉仪阵列DOA估计算法

An Algorithm of Estimation Direction of Arrival for Phase Interferometer Array Using Cosine Function

该文针对相位干涉仪阵列估计波达角过程中的相位差模糊问题,提出一种基于余弦函数的波达角估计算法,并分析了该算法的估计值唯一性条件,该条件比相位差解模糊算法的唯一性条件更宽松。不同情况下的仿真结果表明,只要阵列的基线距离满足估计值唯一性条件,采用该算法能够有效进行高精度的波达角估计。

In the background of phase ambiguity in using phase interferometer to estimate the direction of arrival, a new algorithm is proposed for estimation Direction Of Arrival （DOA） using phase interferometer array with cosine function. The condition on the uniqueness of the estimation direction of arrival is obtained, which is looser than the one of the other algorithms. Simulation results under different condition show that as far as the uniqueness is satisfied, this new algorithm is available for the estimation direction of arrival.