一种用于二维DOA估计的新颖Unitary ESPRIT算法  

New 2-D Unitary ESPRIT algorithm for DOA estimation

作　　者：杨涛[1] 喻晓红[2] 甘露[3] 

机构地区：[1]成都大学实验技术中心,成都610106 [2]成都大学电子信息工程学院,成都610106 [3]电子科技大学电子工程学院,成都611731

出　　处：《计算机工程与应用》2012年第15期123-128,共6页Computer Engineering and Applications

摘　　要：提出了一种基于双均匀线阵的特性新颖的Unitary ESPRIT算法。算法根据阵列接收数据,构造了一种实值数据形式,对其作实值奇异值分解,获得信号子空间。算法利用阵元几何的平移不变特性,构造了包含入射信号方位角和俯仰角的估计量。利用构造的估计量的特征值估计俯仰角信息,利用其对应的特征向量估计方位角信息,自动完成角度的配对。所提方法不仅保持了矩阵DOA估计算法和二维ESPRIT算法的优点,如自动的参数配对、不需要二维谱峰搜索等,而且能够在实数域中直接获得信号子空间,能够有效降低运算量。算法可以增加估计信号个数。仿真实验验证了算法的有效性。A new 2-D Unitary ESPRIT algorithm is proposed based on the characteristics of two parallel Uniform Linear Arrays（ULAs）. The method constructs a real data style based on the data arrays received, and gains the signal subspace by performing real eigenvalue decomposition. The shift invariance property of the array geometry is employed. A new estimator that contains the azimuth and elevation angles of the incidents signals is reconstructed. The algorithm can utilize both the eigenvalues and eigenvectors to obtain the azimuth and elevation angles. The pro- posed method can not only hold the advantages of DOA matrix about automatical parameter alignment and no need of peak searching, but also can deal with the data in real number field to obtain the subspace, which can decrease the amount of calculation. This algorithm can estimate more signal than array number. Simulation experiments verify the effectiveness of the algorithm.

关 键 词：双平行阵 二维到达方向(DOA)估计 Unitary旋转不变子空间(ESPRIT)算法 参数自动配对 

分 类 号：TN957[电子电信—信号与信息处理]