多径条件下阵列互耦自校正算法研究

在实际的阵列中,阵元间的互耦和相干信源的存在都会使得大多数高分辨的DOA估计算法的性能严重下降,甚至完全失效.针对这一问题,在应用子空间原理的基础上,利用均匀线阵互耦矩阵的带状循环特性及对称Toeplitz性,并结合前后向空间平滑算法,提出了一种阵元互耦条件下的相干信源的波达方向估计新算法.该算法无需阵元的互耦参数信息,就可准确地估计出相干信源的DOA,估计性能优良,且只需一维搜索,计算量较小.仿真结果验证了该算法的有效性.

Robust DOA estimation algorithm for coherent signals in the presence of array coupling

In real array antenna systems,mutual coupling between elements and the existence of coherent signals can significantly degrade the performance of most of the high resolution algorithms.To solve it,a robust subspace-based DOA estimation algorithm based on the special structure of coupling matrix in the presence of array coupling is proposed for ULA(Uniform Linear Array).The new algorithm provides a favorable DOA estimation without any knowledge of the array coupling.Because of only referring to the one-dimen...