Root-music based direction-of-arrival estimation methods for arbitrary non-uniform arrays
Root-music based direction-of-arrival estimation methods for arbitrary non-uniform arrays
复制标题
基于根音乐的任意非均匀阵列的到达方向估计方法
DOI：
--
复制
发表时间：
2008
期刊：
影响因子：
--
通讯作者：
A. Gershman
中科院分区：
文献类型：
--
作者：
M. Rübsamen;A. Gershman
针对任意非均匀传感器阵列，提出了两种计算效率较高的高分辨率到达方向估计方法。我们的第一个算法是基于谱MUSIC函数在角度上是周期性的这一事实。利用傅里叶级数展开该函数，我们将DOA估计问题重新表述为一个等价多项式生根问题。我们的第二种方法将傅里叶反变换应用于获得的根music多项式，使用简单的直线搜索，在没有任何多项式生根的情况下计算零谱。与适用于非均匀数组的现有root- music类型方法相比，所提出的技术显示出大大改进了性能与复杂性之间的权衡。
Two computationally efficient high-resolution methods are proposed for direction-of-arrival (DOA) estimation in arbitrary nonuniform sensor arrays. Our first algorithm is based on the fact that the spectral MUSIC function is periodic in angle. Expanding this function using Fourier series, we reformulate the DOA estimation problem as an equivalent polynomial rooting problem. Our second approach applies the inverse Fourier transform to the so-obtained root-MUSIC polynomial to compute the null-spectrum without any polynomial rooting, using a simple line search. The proposed techniques are shown to offer substantially improved performance-to- complexity tradeoffs as compared to the existing root-MUSIC-type methods applicable to non-uniform arrays.