In this work, we tackle the difficulty of direction-of-arrival estimation (DOA) for a uniform linear array (ULA). Furthermore, a spectrum estimation method using a new two-dimensional (2D) ULA is devised. This 2D-ULA conquers the ULA’s inability to estimate the narrow-band sources impinging at grazing incidence. This configuration has doubly crossed ULAs and hence has an array size equals to 2L, where L is the array element. We use the multiple signal classification (MUSIC) algorithm for the estimation of DOAs. This proposed method is dubbed as “2D-ULA-MUSIC” which has the potential to reliably estimate the direction-of-arrivals (DOAs) which are close to an array end-fire. A comprehensive study between the proposed method and the other popular few popular methods is conducted employing simulations over a different number of scatterers, signal-to-noise ratio (SNR), and several samples (snapshots). Computer simulations show that the proposed method circumvents the problem of ULA in many scenarios.

在这项工作中，我们解决了均匀线性阵列 (ULA) 的到达方向估计 (DOA) 的难题。此外，还设计了一种使用新的二维 (2D) ULA 的频谱估计方法。这种 2D-ULA 克服了 ULA 无法估计以掠入射撞击的窄带源。此配置具有双重交叉 ULA，因此数组大小等于 2 L，其中L是数组元素。我们使用多信号分类 (MUSIC) 算法来估计 DOA。这种提议的方法被称为“2D-ULA-MUSIC”，它有可能可靠地估计接近阵列端火的到达方向 (DOA)。通过对不同数量的散射体、信噪比 (SNR) 和多个样本（快照）进行模拟，对所提出的方法和其他几种流行的方法进行了综合研究。计算机模拟表明，所提出的方法在许多情况下规避了 ULA 的问题。