任意整数倍间距排列的线阵阵列流型模糊研究

Study of manifold ambiguity of linear array arranged by arbitrarily integeral multiple of half-wavelength

分析了采用线阵进行来波方向估计时所带来的阵列流型模糊问题,提出了一种基于任意整数倍间距排列(即间距为λ/2的任意整数倍)的线阵阵列流型维数的计算方法.该方法可以给出任意整数倍间距排列的线阵阵列流型的维数,及多个信源入射到阵列时可能产生的所有模糊角度.仿真结果验证了该方法的正确性和有效性.

The manifold ambiguity caused by the direction of arrival（DOA） estimation of linear array was investigated . A novel algorithm for calculating manifold dimension of linear array arranged by arbitrarily integral multiple of half-wavelength was proposed, which can find out the manifold dimension and all the possible ambiguous angles due to the impinging of multi-signals. Through extensive simulations, the validity of this method is justified.