一种快速二维到来方向估计算法

讨论了无线网络通信中多径窄带信号的二维到来方向估计算法的特点和性能,提出了一种基于双平行线阵列结构的二维到来方向估计的快速算法.与以前的工作相比,该算法在求解过程中只需要对较小维数的数据矩阵进行特征值分解,具有较低的计算复杂性,并且能够解决具有相近的方位角或仰角的入射波束问题.该算法利用特征值估计二维到来方向,利用特征向量的对应关系解决二维到来方向的配对问题.仿真试验表明提出的算法具有较小的估计误差,对信噪比的变化具有更好的鲁棒性等优点.

Fast Algorithm for 2-D DOA Estimation

Proposes a fast algorithm for two-dimensional(2D) direction-of-arrival(DOA) estimation of multipath narrow-band sources impinging on the far field of a twin parallel uniform linear array(ULA),analyzing the features and performance of the 2-D DOA estimation algorithms in wireless network communication environment.Compared with the previous work,the proposed algorithm requires a lower computational complexity because the relevant eigenvalue decomposition needed is just for smaller size matrices,and it is available to get the incident beams to which the different azimuth or elevation angles are close with each other.It utilizes the eigenvalues to estimate 2-D DOAs and their corresponding eigenvectors to solve the pairing problem of the estimated 2-D DOAs.Simulation results showed the effectiveness of the proposed algorithm, such as smaller estimation error and higher robustness to SNR.